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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/iio/imu
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/iio/imu')
-rw-r--r--kernel/drivers/iio/imu/Kconfig53
-rw-r--r--kernel/drivers/iio/imu/Makefile18
-rw-r--r--kernel/drivers/iio/imu/adis.c440
-rw-r--r--kernel/drivers/iio/imu/adis16400.h215
-rw-r--r--kernel/drivers/iio/imu/adis16400_buffer.c100
-rw-r--r--kernel/drivers/iio/imu/adis16400_core.c957
-rw-r--r--kernel/drivers/iio/imu/adis16480.c882
-rw-r--r--kernel/drivers/iio/imu/adis_buffer.c171
-rw-r--r--kernel/drivers/iio/imu/adis_trigger.c89
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/Kconfig17
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/Makefile6
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c211
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c917
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h256
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c195
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c150
-rw-r--r--kernel/drivers/iio/imu/kmx61.c1579
17 files changed, 6256 insertions, 0 deletions
diff --git a/kernel/drivers/iio/imu/Kconfig b/kernel/drivers/iio/imu/Kconfig
new file mode 100644
index 000000000..5e610f7de
--- /dev/null
+++ b/kernel/drivers/iio/imu/Kconfig
@@ -0,0 +1,53 @@
+#
+# IIO imu drivers configuration
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Inertial measurement units"
+
+config ADIS16400
+ tristate "Analog Devices ADIS16400 and similar IMU SPI driver"
+ depends on SPI
+ select IIO_ADIS_LIB
+ select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
+ help
+ Say yes here to build support for Analog Devices adis16300, adis16344,
+ adis16350, adis16354, adis16355, adis16360, adis16362, adis16364,
+ adis16365, adis16400 and adis16405 triaxial inertial sensors
+ (adis16400 series also have magnetometers).
+
+config ADIS16480
+ tristate "Analog Devices ADIS16480 and similar IMU driver"
+ depends on SPI
+ select IIO_ADIS_LIB
+ select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
+ help
+ Say yes here to build support for Analog Devices ADIS16375, ADIS16480,
+ ADIS16485, ADIS16488 inertial sensors.
+
+config KMX61
+ tristate "Kionix KMX61 6-axis accelerometer and magnetometer"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build a driver for Kionix KMX61 6-axis
+ accelerometer and magnetometer.
+ To compile this driver as module, choose M here: the module will
+ be called kmx61.
+
+source "drivers/iio/imu/inv_mpu6050/Kconfig"
+
+endmenu
+
+config IIO_ADIS_LIB
+ tristate
+ help
+ A set of IO helper functions for the Analog Devices ADIS* device family.
+
+config IIO_ADIS_LIB_BUFFER
+ bool
+ select IIO_TRIGGERED_BUFFER
+ help
+ A set of buffer helper functions for the Analog Devices ADIS* device
+ family.
diff --git a/kernel/drivers/iio/imu/Makefile b/kernel/drivers/iio/imu/Makefile
new file mode 100644
index 000000000..e1e6e3d70
--- /dev/null
+++ b/kernel/drivers/iio/imu/Makefile
@@ -0,0 +1,18 @@
+#
+# Makefile for Inertial Measurement Units
+#
+
+# When adding new entries keep the list in alphabetical order
+adis16400-y := adis16400_core.o
+adis16400-$(CONFIG_IIO_BUFFER) += adis16400_buffer.o
+obj-$(CONFIG_ADIS16400) += adis16400.o
+obj-$(CONFIG_ADIS16480) += adis16480.o
+
+adis_lib-y += adis.o
+adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) += adis_trigger.o
+adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) += adis_buffer.o
+obj-$(CONFIG_IIO_ADIS_LIB) += adis_lib.o
+
+obj-y += inv_mpu6050/
+
+obj-$(CONFIG_KMX61) += kmx61.o
diff --git a/kernel/drivers/iio/imu/adis.c b/kernel/drivers/iio/imu/adis.c
new file mode 100644
index 000000000..911255d41
--- /dev/null
+++ b/kernel/drivers/iio/imu/adis.c
@@ -0,0 +1,440 @@
+/*
+ * Common library for ADIS16XXX devices
+ *
+ * Copyright 2012 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/imu/adis.h>
+
+#define ADIS_MSC_CTRL_DATA_RDY_EN BIT(2)
+#define ADIS_MSC_CTRL_DATA_RDY_POL_HIGH BIT(1)
+#define ADIS_MSC_CTRL_DATA_RDY_DIO2 BIT(0)
+#define ADIS_GLOB_CMD_SW_RESET BIT(7)
+
+int adis_write_reg(struct adis *adis, unsigned int reg,
+ unsigned int value, unsigned int size)
+{
+ unsigned int page = reg / ADIS_PAGE_SIZE;
+ int ret, i;
+ struct spi_message msg;
+ struct spi_transfer xfers[] = {
+ {
+ .tx_buf = adis->tx,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ .delay_usecs = adis->data->write_delay,
+ }, {
+ .tx_buf = adis->tx + 2,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ .delay_usecs = adis->data->write_delay,
+ }, {
+ .tx_buf = adis->tx + 4,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ .delay_usecs = adis->data->write_delay,
+ }, {
+ .tx_buf = adis->tx + 6,
+ .bits_per_word = 8,
+ .len = 2,
+ .delay_usecs = adis->data->write_delay,
+ }, {
+ .tx_buf = adis->tx + 8,
+ .bits_per_word = 8,
+ .len = 2,
+ .delay_usecs = adis->data->write_delay,
+ },
+ };
+
+ mutex_lock(&adis->txrx_lock);
+
+ spi_message_init(&msg);
+
+ if (adis->current_page != page) {
+ adis->tx[0] = ADIS_WRITE_REG(ADIS_REG_PAGE_ID);
+ adis->tx[1] = page;
+ spi_message_add_tail(&xfers[0], &msg);
+ }
+
+ switch (size) {
+ case 4:
+ adis->tx[8] = ADIS_WRITE_REG(reg + 3);
+ adis->tx[9] = (value >> 24) & 0xff;
+ adis->tx[6] = ADIS_WRITE_REG(reg + 2);
+ adis->tx[7] = (value >> 16) & 0xff;
+ case 2:
+ adis->tx[4] = ADIS_WRITE_REG(reg + 1);
+ adis->tx[5] = (value >> 8) & 0xff;
+ case 1:
+ adis->tx[2] = ADIS_WRITE_REG(reg);
+ adis->tx[3] = value & 0xff;
+ break;
+ default:
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ xfers[size].cs_change = 0;
+
+ for (i = 1; i <= size; i++)
+ spi_message_add_tail(&xfers[i], &msg);
+
+ ret = spi_sync(adis->spi, &msg);
+ if (ret) {
+ dev_err(&adis->spi->dev, "Failed to write register 0x%02X: %d\n",
+ reg, ret);
+ } else {
+ adis->current_page = page;
+ }
+
+out_unlock:
+ mutex_unlock(&adis->txrx_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(adis_write_reg);
+
+/**
+ * adis_read_reg() - read 2 bytes from a 16-bit register
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @val: The value read back from the device
+ */
+int adis_read_reg(struct adis *adis, unsigned int reg,
+ unsigned int *val, unsigned int size)
+{
+ unsigned int page = reg / ADIS_PAGE_SIZE;
+ struct spi_message msg;
+ int ret;
+ struct spi_transfer xfers[] = {
+ {
+ .tx_buf = adis->tx,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ .delay_usecs = adis->data->write_delay,
+ }, {
+ .tx_buf = adis->tx + 2,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ .delay_usecs = adis->data->read_delay,
+ }, {
+ .tx_buf = adis->tx + 4,
+ .rx_buf = adis->rx,
+ .bits_per_word = 8,
+ .len = 2,
+ .cs_change = 1,
+ .delay_usecs = adis->data->read_delay,
+ }, {
+ .rx_buf = adis->rx + 2,
+ .bits_per_word = 8,
+ .len = 2,
+ .delay_usecs = adis->data->read_delay,
+ },
+ };
+
+ mutex_lock(&adis->txrx_lock);
+ spi_message_init(&msg);
+
+ if (adis->current_page != page) {
+ adis->tx[0] = ADIS_WRITE_REG(ADIS_REG_PAGE_ID);
+ adis->tx[1] = page;
+ spi_message_add_tail(&xfers[0], &msg);
+ }
+
+ switch (size) {
+ case 4:
+ adis->tx[2] = ADIS_READ_REG(reg + 2);
+ adis->tx[3] = 0;
+ spi_message_add_tail(&xfers[1], &msg);
+ case 2:
+ adis->tx[4] = ADIS_READ_REG(reg);
+ adis->tx[5] = 0;
+ spi_message_add_tail(&xfers[2], &msg);
+ spi_message_add_tail(&xfers[3], &msg);
+ break;
+ default:
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ ret = spi_sync(adis->spi, &msg);
+ if (ret) {
+ dev_err(&adis->spi->dev, "Failed to read register 0x%02X: %d\n",
+ reg, ret);
+ goto out_unlock;
+ } else {
+ adis->current_page = page;
+ }
+
+ switch (size) {
+ case 4:
+ *val = get_unaligned_be32(adis->rx);
+ break;
+ case 2:
+ *val = get_unaligned_be16(adis->rx + 2);
+ break;
+ }
+
+out_unlock:
+ mutex_unlock(&adis->txrx_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(adis_read_reg);
+
+#ifdef CONFIG_DEBUG_FS
+
+int adis_debugfs_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg, unsigned int writeval, unsigned int *readval)
+{
+ struct adis *adis = iio_device_get_drvdata(indio_dev);
+
+ if (readval) {
+ uint16_t val16;
+ int ret;
+
+ ret = adis_read_reg_16(adis, reg, &val16);
+ *readval = val16;
+
+ return ret;
+ } else {
+ return adis_write_reg_16(adis, reg, writeval);
+ }
+}
+EXPORT_SYMBOL(adis_debugfs_reg_access);
+
+#endif
+
+/**
+ * adis_enable_irq() - Enable or disable data ready IRQ
+ * @adis: The adis device
+ * @enable: Whether to enable the IRQ
+ *
+ * Returns 0 on success, negative error code otherwise
+ */
+int adis_enable_irq(struct adis *adis, bool enable)
+{
+ int ret = 0;
+ uint16_t msc;
+
+ if (adis->data->enable_irq)
+ return adis->data->enable_irq(adis, enable);
+
+ ret = adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc);
+ if (ret)
+ goto error_ret;
+
+ msc |= ADIS_MSC_CTRL_DATA_RDY_POL_HIGH;
+ msc &= ~ADIS_MSC_CTRL_DATA_RDY_DIO2;
+ if (enable)
+ msc |= ADIS_MSC_CTRL_DATA_RDY_EN;
+ else
+ msc &= ~ADIS_MSC_CTRL_DATA_RDY_EN;
+
+ ret = adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc);
+
+error_ret:
+ return ret;
+}
+EXPORT_SYMBOL(adis_enable_irq);
+
+/**
+ * adis_check_status() - Check the device for error conditions
+ * @adis: The adis device
+ *
+ * Returns 0 on success, a negative error code otherwise
+ */
+int adis_check_status(struct adis *adis)
+{
+ uint16_t status;
+ int ret;
+ int i;
+
+ ret = adis_read_reg_16(adis, adis->data->diag_stat_reg, &status);
+ if (ret < 0)
+ return ret;
+
+ status &= adis->data->status_error_mask;
+
+ if (status == 0)
+ return 0;
+
+ for (i = 0; i < 16; ++i) {
+ if (status & BIT(i)) {
+ dev_err(&adis->spi->dev, "%s.\n",
+ adis->data->status_error_msgs[i]);
+ }
+ }
+
+ return -EIO;
+}
+EXPORT_SYMBOL_GPL(adis_check_status);
+
+/**
+ * adis_reset() - Reset the device
+ * @adis: The adis device
+ *
+ * Returns 0 on success, a negative error code otherwise
+ */
+int adis_reset(struct adis *adis)
+{
+ int ret;
+
+ ret = adis_write_reg_8(adis, adis->data->glob_cmd_reg,
+ ADIS_GLOB_CMD_SW_RESET);
+ if (ret)
+ dev_err(&adis->spi->dev, "Failed to reset device: %d\n", ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(adis_reset);
+
+static int adis_self_test(struct adis *adis)
+{
+ int ret;
+
+ ret = adis_write_reg_16(adis, adis->data->msc_ctrl_reg,
+ adis->data->self_test_mask);
+ if (ret) {
+ dev_err(&adis->spi->dev, "Failed to initiate self test: %d\n",
+ ret);
+ return ret;
+ }
+
+ msleep(adis->data->startup_delay);
+
+ return adis_check_status(adis);
+}
+
+/**
+ * adis_inital_startup() - Performs device self-test
+ * @adis: The adis device
+ *
+ * Returns 0 if the device is operational, a negative error code otherwise.
+ *
+ * This function should be called early on in the device initialization sequence
+ * to ensure that the device is in a sane and known state and that it is usable.
+ */
+int adis_initial_startup(struct adis *adis)
+{
+ int ret;
+
+ ret = adis_self_test(adis);
+ if (ret) {
+ dev_err(&adis->spi->dev, "Self-test failed, trying reset.\n");
+ adis_reset(adis);
+ msleep(adis->data->startup_delay);
+ ret = adis_self_test(adis);
+ if (ret) {
+ dev_err(&adis->spi->dev, "Second self-test failed, giving up.\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(adis_initial_startup);
+
+/**
+ * adis_single_conversion() - Performs a single sample conversion
+ * @indio_dev: The IIO device
+ * @chan: The IIO channel
+ * @error_mask: Mask for the error bit
+ * @val: Result of the conversion
+ *
+ * Returns IIO_VAL_INT on success, a negative error code otherwise.
+ *
+ * The function performs a single conversion on a given channel and post
+ * processes the value accordingly to the channel spec. If a error_mask is given
+ * the function will check if the mask is set in the returned raw value. If it
+ * is set the function will perform a self-check. If the device does not report
+ * a error bit in the channels raw value set error_mask to 0.
+ */
+int adis_single_conversion(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, unsigned int error_mask, int *val)
+{
+ struct adis *adis = iio_device_get_drvdata(indio_dev);
+ unsigned int uval;
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+
+ ret = adis_read_reg(adis, chan->address, &uval,
+ chan->scan_type.storagebits / 8);
+ if (ret)
+ goto err_unlock;
+
+ if (uval & error_mask) {
+ ret = adis_check_status(adis);
+ if (ret)
+ goto err_unlock;
+ }
+
+ if (chan->scan_type.sign == 's')
+ *val = sign_extend32(uval, chan->scan_type.realbits - 1);
+ else
+ *val = uval & ((1 << chan->scan_type.realbits) - 1);
+
+ ret = IIO_VAL_INT;
+err_unlock:
+ mutex_unlock(&indio_dev->mlock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(adis_single_conversion);
+
+/**
+ * adis_init() - Initialize adis device structure
+ * @adis: The adis device
+ * @indio_dev: The iio device
+ * @spi: The spi device
+ * @data: Chip specific data
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ *
+ * This function must be called, before any other adis helper function may be
+ * called.
+ */
+int adis_init(struct adis *adis, struct iio_dev *indio_dev,
+ struct spi_device *spi, const struct adis_data *data)
+{
+ mutex_init(&adis->txrx_lock);
+ adis->spi = spi;
+ adis->data = data;
+ iio_device_set_drvdata(indio_dev, adis);
+
+ if (data->has_paging) {
+ /* Need to set the page before first read/write */
+ adis->current_page = -1;
+ } else {
+ /* Page will always be 0 */
+ adis->current_page = 0;
+ }
+
+ return adis_enable_irq(adis, false);
+}
+EXPORT_SYMBOL_GPL(adis_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Common library code for ADIS16XXX devices");
diff --git a/kernel/drivers/iio/imu/adis16400.h b/kernel/drivers/iio/imu/adis16400.h
new file mode 100644
index 000000000..73b189c1c
--- /dev/null
+++ b/kernel/drivers/iio/imu/adis16400.h
@@ -0,0 +1,215 @@
+/*
+ * adis16400.h support Analog Devices ADIS16400
+ * 3d 18g accelerometers,
+ * 3d gyroscopes,
+ * 3d 2.5gauss magnetometers via SPI
+ *
+ * Copyright (c) 2009 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
+ * Copyright (c) 2007 Jonathan Cameron <jic23@kernel.org>
+ *
+ * Loosely based upon lis3l02dq.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef SPI_ADIS16400_H_
+#define SPI_ADIS16400_H_
+
+#include <linux/iio/imu/adis.h>
+
+#define ADIS16400_STARTUP_DELAY 290 /* ms */
+#define ADIS16400_MTEST_DELAY 90 /* ms */
+
+#define ADIS16400_FLASH_CNT 0x00 /* Flash memory write count */
+#define ADIS16400_SUPPLY_OUT 0x02 /* Power supply measurement */
+#define ADIS16400_XGYRO_OUT 0x04 /* X-axis gyroscope output */
+#define ADIS16400_YGYRO_OUT 0x06 /* Y-axis gyroscope output */
+#define ADIS16400_ZGYRO_OUT 0x08 /* Z-axis gyroscope output */
+#define ADIS16400_XACCL_OUT 0x0A /* X-axis accelerometer output */
+#define ADIS16400_YACCL_OUT 0x0C /* Y-axis accelerometer output */
+#define ADIS16400_ZACCL_OUT 0x0E /* Z-axis accelerometer output */
+#define ADIS16400_XMAGN_OUT 0x10 /* X-axis magnetometer measurement */
+#define ADIS16400_YMAGN_OUT 0x12 /* Y-axis magnetometer measurement */
+#define ADIS16400_ZMAGN_OUT 0x14 /* Z-axis magnetometer measurement */
+#define ADIS16400_TEMP_OUT 0x16 /* Temperature output */
+#define ADIS16400_AUX_ADC 0x18 /* Auxiliary ADC measurement */
+
+#define ADIS16350_XTEMP_OUT 0x10 /* X-axis gyroscope temperature measurement */
+#define ADIS16350_YTEMP_OUT 0x12 /* Y-axis gyroscope temperature measurement */
+#define ADIS16350_ZTEMP_OUT 0x14 /* Z-axis gyroscope temperature measurement */
+
+#define ADIS16300_PITCH_OUT 0x12 /* X axis inclinometer output measurement */
+#define ADIS16300_ROLL_OUT 0x14 /* Y axis inclinometer output measurement */
+#define ADIS16300_AUX_ADC 0x16 /* Auxiliary ADC measurement */
+
+#define ADIS16448_BARO_OUT 0x16 /* Barometric pressure output */
+#define ADIS16448_TEMP_OUT 0x18 /* Temperature output */
+
+/* Calibration parameters */
+#define ADIS16400_XGYRO_OFF 0x1A /* X-axis gyroscope bias offset factor */
+#define ADIS16400_YGYRO_OFF 0x1C /* Y-axis gyroscope bias offset factor */
+#define ADIS16400_ZGYRO_OFF 0x1E /* Z-axis gyroscope bias offset factor */
+#define ADIS16400_XACCL_OFF 0x20 /* X-axis acceleration bias offset factor */
+#define ADIS16400_YACCL_OFF 0x22 /* Y-axis acceleration bias offset factor */
+#define ADIS16400_ZACCL_OFF 0x24 /* Z-axis acceleration bias offset factor */
+#define ADIS16400_XMAGN_HIF 0x26 /* X-axis magnetometer, hard-iron factor */
+#define ADIS16400_YMAGN_HIF 0x28 /* Y-axis magnetometer, hard-iron factor */
+#define ADIS16400_ZMAGN_HIF 0x2A /* Z-axis magnetometer, hard-iron factor */
+#define ADIS16400_XMAGN_SIF 0x2C /* X-axis magnetometer, soft-iron factor */
+#define ADIS16400_YMAGN_SIF 0x2E /* Y-axis magnetometer, soft-iron factor */
+#define ADIS16400_ZMAGN_SIF 0x30 /* Z-axis magnetometer, soft-iron factor */
+
+#define ADIS16400_GPIO_CTRL 0x32 /* Auxiliary digital input/output control */
+#define ADIS16400_MSC_CTRL 0x34 /* Miscellaneous control */
+#define ADIS16400_SMPL_PRD 0x36 /* Internal sample period (rate) control */
+#define ADIS16400_SENS_AVG 0x38 /* Dynamic range and digital filter control */
+#define ADIS16400_SLP_CNT 0x3A /* Sleep mode control */
+#define ADIS16400_DIAG_STAT 0x3C /* System status */
+
+/* Alarm functions */
+#define ADIS16400_GLOB_CMD 0x3E /* System command */
+#define ADIS16400_ALM_MAG1 0x40 /* Alarm 1 amplitude threshold */
+#define ADIS16400_ALM_MAG2 0x42 /* Alarm 2 amplitude threshold */
+#define ADIS16400_ALM_SMPL1 0x44 /* Alarm 1 sample size */
+#define ADIS16400_ALM_SMPL2 0x46 /* Alarm 2 sample size */
+#define ADIS16400_ALM_CTRL 0x48 /* Alarm control */
+#define ADIS16400_AUX_DAC 0x4A /* Auxiliary DAC data */
+
+#define ADIS16334_LOT_ID1 0x52 /* Lot identification code 1 */
+#define ADIS16334_LOT_ID2 0x54 /* Lot identification code 2 */
+#define ADIS16400_PRODUCT_ID 0x56 /* Product identifier */
+#define ADIS16334_SERIAL_NUMBER 0x58 /* Serial number, lot specific */
+
+#define ADIS16400_ERROR_ACTIVE (1<<14)
+#define ADIS16400_NEW_DATA (1<<14)
+
+/* MSC_CTRL */
+#define ADIS16400_MSC_CTRL_MEM_TEST (1<<11)
+#define ADIS16400_MSC_CTRL_INT_SELF_TEST (1<<10)
+#define ADIS16400_MSC_CTRL_NEG_SELF_TEST (1<<9)
+#define ADIS16400_MSC_CTRL_POS_SELF_TEST (1<<8)
+#define ADIS16400_MSC_CTRL_GYRO_BIAS (1<<7)
+#define ADIS16400_MSC_CTRL_ACCL_ALIGN (1<<6)
+#define ADIS16400_MSC_CTRL_DATA_RDY_EN (1<<2)
+#define ADIS16400_MSC_CTRL_DATA_RDY_POL_HIGH (1<<1)
+#define ADIS16400_MSC_CTRL_DATA_RDY_DIO2 (1<<0)
+
+/* SMPL_PRD */
+#define ADIS16400_SMPL_PRD_TIME_BASE (1<<7)
+#define ADIS16400_SMPL_PRD_DIV_MASK 0x7F
+
+/* DIAG_STAT */
+#define ADIS16400_DIAG_STAT_ZACCL_FAIL 15
+#define ADIS16400_DIAG_STAT_YACCL_FAIL 14
+#define ADIS16400_DIAG_STAT_XACCL_FAIL 13
+#define ADIS16400_DIAG_STAT_XGYRO_FAIL 12
+#define ADIS16400_DIAG_STAT_YGYRO_FAIL 11
+#define ADIS16400_DIAG_STAT_ZGYRO_FAIL 10
+#define ADIS16400_DIAG_STAT_ALARM2 9
+#define ADIS16400_DIAG_STAT_ALARM1 8
+#define ADIS16400_DIAG_STAT_FLASH_CHK 6
+#define ADIS16400_DIAG_STAT_SELF_TEST 5
+#define ADIS16400_DIAG_STAT_OVERFLOW 4
+#define ADIS16400_DIAG_STAT_SPI_FAIL 3
+#define ADIS16400_DIAG_STAT_FLASH_UPT 2
+#define ADIS16400_DIAG_STAT_POWER_HIGH 1
+#define ADIS16400_DIAG_STAT_POWER_LOW 0
+
+/* GLOB_CMD */
+#define ADIS16400_GLOB_CMD_SW_RESET (1<<7)
+#define ADIS16400_GLOB_CMD_P_AUTO_NULL (1<<4)
+#define ADIS16400_GLOB_CMD_FLASH_UPD (1<<3)
+#define ADIS16400_GLOB_CMD_DAC_LATCH (1<<2)
+#define ADIS16400_GLOB_CMD_FAC_CALIB (1<<1)
+#define ADIS16400_GLOB_CMD_AUTO_NULL (1<<0)
+
+/* SLP_CNT */
+#define ADIS16400_SLP_CNT_POWER_OFF (1<<8)
+
+#define ADIS16334_RATE_DIV_SHIFT 8
+#define ADIS16334_RATE_INT_CLK BIT(0)
+
+#define ADIS16400_SPI_SLOW (u32)(300 * 1000)
+#define ADIS16400_SPI_BURST (u32)(1000 * 1000)
+#define ADIS16400_SPI_FAST (u32)(2000 * 1000)
+
+#define ADIS16400_HAS_PROD_ID BIT(0)
+#define ADIS16400_NO_BURST BIT(1)
+#define ADIS16400_HAS_SLOW_MODE BIT(2)
+#define ADIS16400_HAS_SERIAL_NUMBER BIT(3)
+#define ADIS16400_BURST_DIAG_STAT BIT(4)
+
+struct adis16400_state;
+
+struct adis16400_chip_info {
+ const struct iio_chan_spec *channels;
+ const int num_channels;
+ const long flags;
+ unsigned int gyro_scale_micro;
+ unsigned int accel_scale_micro;
+ int temp_scale_nano;
+ int temp_offset;
+ int (*set_freq)(struct adis16400_state *st, unsigned int freq);
+ int (*get_freq)(struct adis16400_state *st);
+};
+
+/**
+ * struct adis16400_state - device instance specific data
+ * @variant: chip variant info
+ * @filt_int: integer part of requested filter frequency
+ * @adis: adis device
+ **/
+struct adis16400_state {
+ struct adis16400_chip_info *variant;
+ int filt_int;
+
+ struct adis adis;
+ unsigned long avail_scan_mask[2];
+};
+
+/* At the moment triggers are only used for ring buffer
+ * filling. This may change!
+ */
+
+enum {
+ ADIS16400_SCAN_SUPPLY,
+ ADIS16400_SCAN_GYRO_X,
+ ADIS16400_SCAN_GYRO_Y,
+ ADIS16400_SCAN_GYRO_Z,
+ ADIS16400_SCAN_ACC_X,
+ ADIS16400_SCAN_ACC_Y,
+ ADIS16400_SCAN_ACC_Z,
+ ADIS16400_SCAN_MAGN_X,
+ ADIS16400_SCAN_MAGN_Y,
+ ADIS16400_SCAN_MAGN_Z,
+ ADIS16400_SCAN_BARO,
+ ADIS16350_SCAN_TEMP_X,
+ ADIS16350_SCAN_TEMP_Y,
+ ADIS16350_SCAN_TEMP_Z,
+ ADIS16300_SCAN_INCLI_X,
+ ADIS16300_SCAN_INCLI_Y,
+ ADIS16400_SCAN_ADC,
+ ADIS16400_SCAN_TIMESTAMP,
+};
+
+#ifdef CONFIG_IIO_BUFFER
+
+ssize_t adis16400_read_data_from_ring(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+
+
+int adis16400_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask);
+irqreturn_t adis16400_trigger_handler(int irq, void *p);
+
+#else /* CONFIG_IIO_BUFFER */
+
+#define adis16400_update_scan_mode NULL
+#define adis16400_trigger_handler NULL
+
+#endif /* CONFIG_IIO_BUFFER */
+
+#endif /* SPI_ADIS16400_H_ */
diff --git a/kernel/drivers/iio/imu/adis16400_buffer.c b/kernel/drivers/iio/imu/adis16400_buffer.c
new file mode 100644
index 000000000..90c24a23c
--- /dev/null
+++ b/kernel/drivers/iio/imu/adis16400_buffer.c
@@ -0,0 +1,100 @@
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+#include <linux/export.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#include "adis16400.h"
+
+int adis16400_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct adis16400_state *st = iio_priv(indio_dev);
+ struct adis *adis = &st->adis;
+ unsigned int burst_length;
+ u8 *tx;
+
+ if (st->variant->flags & ADIS16400_NO_BURST)
+ return adis_update_scan_mode(indio_dev, scan_mask);
+
+ kfree(adis->xfer);
+ kfree(adis->buffer);
+
+ /* All but the timestamp channel */
+ burst_length = (indio_dev->num_channels - 1) * sizeof(u16);
+ if (st->variant->flags & ADIS16400_BURST_DIAG_STAT)
+ burst_length += sizeof(u16);
+
+ adis->xfer = kcalloc(2, sizeof(*adis->xfer), GFP_KERNEL);
+ if (!adis->xfer)
+ return -ENOMEM;
+
+ adis->buffer = kzalloc(burst_length + sizeof(u16), GFP_KERNEL);
+ if (!adis->buffer)
+ return -ENOMEM;
+
+ tx = adis->buffer + burst_length;
+ tx[0] = ADIS_READ_REG(ADIS16400_GLOB_CMD);
+ tx[1] = 0;
+
+ adis->xfer[0].tx_buf = tx;
+ adis->xfer[0].bits_per_word = 8;
+ adis->xfer[0].len = 2;
+ adis->xfer[1].rx_buf = adis->buffer;
+ adis->xfer[1].bits_per_word = 8;
+ adis->xfer[1].len = burst_length;
+
+ spi_message_init(&adis->msg);
+ spi_message_add_tail(&adis->xfer[0], &adis->msg);
+ spi_message_add_tail(&adis->xfer[1], &adis->msg);
+
+ return 0;
+}
+
+irqreturn_t adis16400_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct adis16400_state *st = iio_priv(indio_dev);
+ struct adis *adis = &st->adis;
+ u32 old_speed_hz = st->adis.spi->max_speed_hz;
+ void *buffer;
+ int ret;
+
+ if (!adis->buffer)
+ return -ENOMEM;
+
+ if (!(st->variant->flags & ADIS16400_NO_BURST) &&
+ st->adis.spi->max_speed_hz > ADIS16400_SPI_BURST) {
+ st->adis.spi->max_speed_hz = ADIS16400_SPI_BURST;
+ spi_setup(st->adis.spi);
+ }
+
+ ret = spi_sync(adis->spi, &adis->msg);
+ if (ret)
+ dev_err(&adis->spi->dev, "Failed to read data: %d\n", ret);
+
+ if (!(st->variant->flags & ADIS16400_NO_BURST)) {
+ st->adis.spi->max_speed_hz = old_speed_hz;
+ spi_setup(st->adis.spi);
+ }
+
+ if (st->variant->flags & ADIS16400_BURST_DIAG_STAT)
+ buffer = adis->buffer + sizeof(u16);
+ else
+ buffer = adis->buffer;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+ pf->timestamp);
+
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
diff --git a/kernel/drivers/iio/imu/adis16400_core.c b/kernel/drivers/iio/imu/adis16400_core.c
new file mode 100644
index 000000000..2fd68f221
--- /dev/null
+++ b/kernel/drivers/iio/imu/adis16400_core.c
@@ -0,0 +1,957 @@
+/*
+ * adis16400.c support Analog Devices ADIS16400/5
+ * 3d 2g Linear Accelerometers,
+ * 3d Gyroscopes,
+ * 3d Magnetometers via SPI
+ *
+ * Copyright (c) 2009 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
+ * Copyright (c) 2007 Jonathan Cameron <jic23@kernel.org>
+ * Copyright (c) 2011 Analog Devices Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/bitops.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+
+#include "adis16400.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+static ssize_t adis16400_show_serial_number(struct file *file,
+ char __user *userbuf, size_t count, loff_t *ppos)
+{
+ struct adis16400_state *st = file->private_data;
+ u16 lot1, lot2, serial_number;
+ char buf[16];
+ size_t len;
+ int ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16334_LOT_ID1, &lot1);
+ if (ret < 0)
+ return ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16334_LOT_ID2, &lot2);
+ if (ret < 0)
+ return ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16334_SERIAL_NUMBER,
+ &serial_number);
+ if (ret < 0)
+ return ret;
+
+ len = snprintf(buf, sizeof(buf), "%.4x-%.4x-%.4x\n", lot1, lot2,
+ serial_number);
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+
+static const struct file_operations adis16400_serial_number_fops = {
+ .open = simple_open,
+ .read = adis16400_show_serial_number,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE,
+};
+
+static int adis16400_show_product_id(void *arg, u64 *val)
+{
+ struct adis16400_state *st = arg;
+ uint16_t prod_id;
+ int ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16400_PRODUCT_ID, &prod_id);
+ if (ret < 0)
+ return ret;
+
+ *val = prod_id;
+
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(adis16400_product_id_fops,
+ adis16400_show_product_id, NULL, "%lld\n");
+
+static int adis16400_show_flash_count(void *arg, u64 *val)
+{
+ struct adis16400_state *st = arg;
+ uint16_t flash_count;
+ int ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16400_FLASH_CNT, &flash_count);
+ if (ret < 0)
+ return ret;
+
+ *val = flash_count;
+
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(adis16400_flash_count_fops,
+ adis16400_show_flash_count, NULL, "%lld\n");
+
+static int adis16400_debugfs_init(struct iio_dev *indio_dev)
+{
+ struct adis16400_state *st = iio_priv(indio_dev);
+
+ if (st->variant->flags & ADIS16400_HAS_SERIAL_NUMBER)
+ debugfs_create_file("serial_number", 0400,
+ indio_dev->debugfs_dentry, st,
+ &adis16400_serial_number_fops);
+ if (st->variant->flags & ADIS16400_HAS_PROD_ID)
+ debugfs_create_file("product_id", 0400,
+ indio_dev->debugfs_dentry, st,
+ &adis16400_product_id_fops);
+ debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry,
+ st, &adis16400_flash_count_fops);
+
+ return 0;
+}
+
+#else
+
+static int adis16400_debugfs_init(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+#endif
+
+enum adis16400_chip_variant {
+ ADIS16300,
+ ADIS16334,
+ ADIS16350,
+ ADIS16360,
+ ADIS16362,
+ ADIS16364,
+ ADIS16400,
+ ADIS16448,
+};
+
+static int adis16334_get_freq(struct adis16400_state *st)
+{
+ int ret;
+ uint16_t t;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &t);
+ if (ret < 0)
+ return ret;
+
+ t >>= ADIS16334_RATE_DIV_SHIFT;
+
+ return 819200 >> t;
+}
+
+static int adis16334_set_freq(struct adis16400_state *st, unsigned int freq)
+{
+ unsigned int t;
+
+ if (freq < 819200)
+ t = ilog2(819200 / freq);
+ else
+ t = 0;
+
+ if (t > 0x31)
+ t = 0x31;
+
+ t <<= ADIS16334_RATE_DIV_SHIFT;
+ t |= ADIS16334_RATE_INT_CLK;
+
+ return adis_write_reg_16(&st->adis, ADIS16400_SMPL_PRD, t);
+}
+
+static int adis16400_get_freq(struct adis16400_state *st)
+{
+ int sps, ret;
+ uint16_t t;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &t);
+ if (ret < 0)
+ return ret;
+
+ sps = (t & ADIS16400_SMPL_PRD_TIME_BASE) ? 52851 : 1638404;
+ sps /= (t & ADIS16400_SMPL_PRD_DIV_MASK) + 1;
+
+ return sps;
+}
+
+static int adis16400_set_freq(struct adis16400_state *st, unsigned int freq)
+{
+ unsigned int t;
+ uint8_t val = 0;
+
+ t = 1638404 / freq;
+ if (t >= 128) {
+ val |= ADIS16400_SMPL_PRD_TIME_BASE;
+ t = 52851 / freq;
+ if (t >= 128)
+ t = 127;
+ } else if (t != 0) {
+ t--;
+ }
+
+ val |= t;
+
+ if (t >= 0x0A || (val & ADIS16400_SMPL_PRD_TIME_BASE))
+ st->adis.spi->max_speed_hz = ADIS16400_SPI_SLOW;
+ else
+ st->adis.spi->max_speed_hz = ADIS16400_SPI_FAST;
+
+ return adis_write_reg_8(&st->adis, ADIS16400_SMPL_PRD, val);
+}
+
+static const unsigned adis16400_3db_divisors[] = {
+ [0] = 2, /* Special case */
+ [1] = 6,
+ [2] = 12,
+ [3] = 25,
+ [4] = 50,
+ [5] = 100,
+ [6] = 200,
+ [7] = 200, /* Not a valid setting */
+};
+
+static int adis16400_set_filter(struct iio_dev *indio_dev, int sps, int val)
+{
+ struct adis16400_state *st = iio_priv(indio_dev);
+ uint16_t val16;
+ int i, ret;
+
+ for (i = ARRAY_SIZE(adis16400_3db_divisors) - 1; i >= 1; i--) {
+ if (sps / adis16400_3db_divisors[i] >= val)
+ break;
+ }
+
+ ret = adis_read_reg_16(&st->adis, ADIS16400_SENS_AVG, &val16);
+ if (ret < 0)
+ return ret;
+
+ ret = adis_write_reg_16(&st->adis, ADIS16400_SENS_AVG,
+ (val16 & ~0x07) | i);
+ return ret;
+}
+
+/* Power down the device */
+static int adis16400_stop_device(struct iio_dev *indio_dev)
+{
+ struct adis16400_state *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = adis_write_reg_16(&st->adis, ADIS16400_SLP_CNT,
+ ADIS16400_SLP_CNT_POWER_OFF);
+ if (ret)
+ dev_err(&indio_dev->dev,
+ "problem with turning device off: SLP_CNT");
+
+ return ret;
+}
+
+static int adis16400_initial_setup(struct iio_dev *indio_dev)
+{
+ struct adis16400_state *st = iio_priv(indio_dev);
+ uint16_t prod_id, smp_prd;
+ unsigned int device_id;
+ int ret;
+
+ /* use low spi speed for init if the device has a slow mode */
+ if (st->variant->flags & ADIS16400_HAS_SLOW_MODE)
+ st->adis.spi->max_speed_hz = ADIS16400_SPI_SLOW;
+ else
+ st->adis.spi->max_speed_hz = ADIS16400_SPI_FAST;
+ st->adis.spi->mode = SPI_MODE_3;
+ spi_setup(st->adis.spi);
+
+ ret = adis_initial_startup(&st->adis);
+ if (ret)
+ return ret;
+
+ if (st->variant->flags & ADIS16400_HAS_PROD_ID) {
+ ret = adis_read_reg_16(&st->adis,
+ ADIS16400_PRODUCT_ID, &prod_id);
+ if (ret)
+ goto err_ret;
+
+ sscanf(indio_dev->name, "adis%u\n", &device_id);
+
+ if (prod_id != device_id)
+ dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.",
+ device_id, prod_id);
+
+ dev_info(&indio_dev->dev, "%s: prod_id 0x%04x at CS%d (irq %d)\n",
+ indio_dev->name, prod_id,
+ st->adis.spi->chip_select, st->adis.spi->irq);
+ }
+ /* use high spi speed if possible */
+ if (st->variant->flags & ADIS16400_HAS_SLOW_MODE) {
+ ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &smp_prd);
+ if (ret)
+ goto err_ret;
+
+ if ((smp_prd & ADIS16400_SMPL_PRD_DIV_MASK) < 0x0A) {
+ st->adis.spi->max_speed_hz = ADIS16400_SPI_FAST;
+ spi_setup(st->adis.spi);
+ }
+ }
+
+err_ret:
+ return ret;
+}
+
+static const uint8_t adis16400_addresses[] = {
+ [ADIS16400_SCAN_GYRO_X] = ADIS16400_XGYRO_OFF,
+ [ADIS16400_SCAN_GYRO_Y] = ADIS16400_YGYRO_OFF,
+ [ADIS16400_SCAN_GYRO_Z] = ADIS16400_ZGYRO_OFF,
+ [ADIS16400_SCAN_ACC_X] = ADIS16400_XACCL_OFF,
+ [ADIS16400_SCAN_ACC_Y] = ADIS16400_YACCL_OFF,
+ [ADIS16400_SCAN_ACC_Z] = ADIS16400_ZACCL_OFF,
+};
+
+static int adis16400_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long info)
+{
+ struct adis16400_state *st = iio_priv(indio_dev);
+ int ret, sps;
+
+ switch (info) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ mutex_lock(&indio_dev->mlock);
+ ret = adis_write_reg_16(&st->adis,
+ adis16400_addresses[chan->scan_index], val);
+ mutex_unlock(&indio_dev->mlock);
+ return ret;
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ /*
+ * Need to cache values so we can update if the frequency
+ * changes.
+ */
+ mutex_lock(&indio_dev->mlock);
+ st->filt_int = val;
+ /* Work out update to current value */
+ sps = st->variant->get_freq(st);
+ if (sps < 0) {
+ mutex_unlock(&indio_dev->mlock);
+ return sps;
+ }
+
+ ret = adis16400_set_filter(indio_dev, sps,
+ val * 1000 + val2 / 1000);
+ mutex_unlock(&indio_dev->mlock);
+ return ret;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ sps = val * 1000 + val2 / 1000;
+
+ if (sps <= 0)
+ return -EINVAL;
+
+ mutex_lock(&indio_dev->mlock);
+ ret = st->variant->set_freq(st, sps);
+ mutex_unlock(&indio_dev->mlock);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adis16400_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val, int *val2, long info)
+{
+ struct adis16400_state *st = iio_priv(indio_dev);
+ int16_t val16;
+ int ret;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ return adis_single_conversion(indio_dev, chan, 0, val);
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ *val = 0;
+ *val2 = st->variant->gyro_scale_micro;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_VOLTAGE:
+ *val = 0;
+ if (chan->channel == 0) {
+ *val = 2;
+ *val2 = 418000; /* 2.418 mV */
+ } else {
+ *val = 0;
+ *val2 = 805800; /* 805.8 uV */
+ }
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_ACCEL:
+ *val = 0;
+ *val2 = st->variant->accel_scale_micro;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_MAGN:
+ *val = 0;
+ *val2 = 500; /* 0.5 mgauss */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_TEMP:
+ *val = st->variant->temp_scale_nano / 1000000;
+ *val2 = (st->variant->temp_scale_nano % 1000000);
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_PRESSURE:
+ /* 20 uBar = 0.002kPascal */
+ *val = 0;
+ *val2 = 2000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_CALIBBIAS:
+ mutex_lock(&indio_dev->mlock);
+ ret = adis_read_reg_16(&st->adis,
+ adis16400_addresses[chan->scan_index], &val16);
+ mutex_unlock(&indio_dev->mlock);
+ if (ret)
+ return ret;
+ val16 = sign_extend32(val16, 11);
+ *val = val16;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_OFFSET:
+ /* currently only temperature */
+ *val = st->variant->temp_offset;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ mutex_lock(&indio_dev->mlock);
+ /* Need both the number of taps and the sampling frequency */
+ ret = adis_read_reg_16(&st->adis,
+ ADIS16400_SENS_AVG,
+ &val16);
+ if (ret < 0) {
+ mutex_unlock(&indio_dev->mlock);
+ return ret;
+ }
+ ret = st->variant->get_freq(st);
+ if (ret >= 0) {
+ ret /= adis16400_3db_divisors[val16 & 0x07];
+ *val = ret / 1000;
+ *val2 = (ret % 1000) * 1000;
+ }
+ mutex_unlock(&indio_dev->mlock);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = st->variant->get_freq(st);
+ if (ret < 0)
+ return ret;
+ *val = ret / 1000;
+ *val2 = (ret % 1000) * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+#define ADIS16400_VOLTAGE_CHAN(addr, bits, name, si, chn) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .channel = chn, \
+ .extend_name = name, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (addr), \
+ .scan_index = (si), \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 0, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+#define ADIS16400_SUPPLY_CHAN(addr, bits) \
+ ADIS16400_VOLTAGE_CHAN(addr, bits, "supply", ADIS16400_SCAN_SUPPLY, 0)
+
+#define ADIS16400_AUX_ADC_CHAN(addr, bits) \
+ ADIS16400_VOLTAGE_CHAN(addr, bits, NULL, ADIS16400_SCAN_ADC, 1)
+
+#define ADIS16400_GYRO_CHAN(mod, addr, bits) { \
+ .type = IIO_ANGL_VEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_ ## mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = addr, \
+ .scan_index = ADIS16400_SCAN_GYRO_ ## mod, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 0, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+#define ADIS16400_ACCEL_CHAN(mod, addr, bits) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_ ## mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (addr), \
+ .scan_index = ADIS16400_SCAN_ACC_ ## mod, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 0, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+#define ADIS16400_MAGN_CHAN(mod, addr, bits) { \
+ .type = IIO_MAGN, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_ ## mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (addr), \
+ .scan_index = ADIS16400_SCAN_MAGN_ ## mod, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 0, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+#define ADIS16400_MOD_TEMP_NAME_X "x"
+#define ADIS16400_MOD_TEMP_NAME_Y "y"
+#define ADIS16400_MOD_TEMP_NAME_Z "z"
+
+#define ADIS16400_MOD_TEMP_CHAN(mod, addr, bits) { \
+ .type = IIO_TEMP, \
+ .indexed = 1, \
+ .channel = 0, \
+ .extend_name = ADIS16400_MOD_TEMP_NAME_ ## mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_type = \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (addr), \
+ .scan_index = ADIS16350_SCAN_TEMP_ ## mod, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 0, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+#define ADIS16400_TEMP_CHAN(addr, bits) { \
+ .type = IIO_TEMP, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (addr), \
+ .scan_index = ADIS16350_SCAN_TEMP_X, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 0, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+#define ADIS16400_INCLI_CHAN(mod, addr, bits) { \
+ .type = IIO_INCLI, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_ ## mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (addr), \
+ .scan_index = ADIS16300_SCAN_INCLI_ ## mod, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 0, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+static const struct iio_chan_spec adis16400_channels[] = {
+ ADIS16400_SUPPLY_CHAN(ADIS16400_SUPPLY_OUT, 14),
+ ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14),
+ ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 14),
+ ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 14),
+ ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14),
+ ADIS16400_MAGN_CHAN(X, ADIS16400_XMAGN_OUT, 14),
+ ADIS16400_MAGN_CHAN(Y, ADIS16400_YMAGN_OUT, 14),
+ ADIS16400_MAGN_CHAN(Z, ADIS16400_ZMAGN_OUT, 14),
+ ADIS16400_TEMP_CHAN(ADIS16400_TEMP_OUT, 12),
+ ADIS16400_AUX_ADC_CHAN(ADIS16400_AUX_ADC, 12),
+ IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
+};
+
+static const struct iio_chan_spec adis16448_channels[] = {
+ ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 16),
+ ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 16),
+ ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 16),
+ ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 16),
+ ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 16),
+ ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 16),
+ ADIS16400_MAGN_CHAN(X, ADIS16400_XMAGN_OUT, 16),
+ ADIS16400_MAGN_CHAN(Y, ADIS16400_YMAGN_OUT, 16),
+ ADIS16400_MAGN_CHAN(Z, ADIS16400_ZMAGN_OUT, 16),
+ {
+ .type = IIO_PRESSURE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .address = ADIS16448_BARO_OUT,
+ .scan_index = ADIS16400_SCAN_BARO,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_BE,
+ },
+ },
+ ADIS16400_TEMP_CHAN(ADIS16448_TEMP_OUT, 12),
+ IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
+};
+
+static const struct iio_chan_spec adis16350_channels[] = {
+ ADIS16400_SUPPLY_CHAN(ADIS16400_SUPPLY_OUT, 12),
+ ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14),
+ ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 14),
+ ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 14),
+ ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14),
+ ADIS16400_MAGN_CHAN(X, ADIS16400_XMAGN_OUT, 14),
+ ADIS16400_MAGN_CHAN(Y, ADIS16400_YMAGN_OUT, 14),
+ ADIS16400_MAGN_CHAN(Z, ADIS16400_ZMAGN_OUT, 14),
+ ADIS16400_AUX_ADC_CHAN(ADIS16300_AUX_ADC, 12),
+ ADIS16400_MOD_TEMP_CHAN(X, ADIS16350_XTEMP_OUT, 12),
+ ADIS16400_MOD_TEMP_CHAN(Y, ADIS16350_YTEMP_OUT, 12),
+ ADIS16400_MOD_TEMP_CHAN(Z, ADIS16350_ZTEMP_OUT, 12),
+ IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
+};
+
+static const struct iio_chan_spec adis16300_channels[] = {
+ ADIS16400_SUPPLY_CHAN(ADIS16400_SUPPLY_OUT, 12),
+ ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14),
+ ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14),
+ ADIS16400_TEMP_CHAN(ADIS16350_XTEMP_OUT, 12),
+ ADIS16400_AUX_ADC_CHAN(ADIS16300_AUX_ADC, 12),
+ ADIS16400_INCLI_CHAN(X, ADIS16300_PITCH_OUT, 13),
+ ADIS16400_INCLI_CHAN(Y, ADIS16300_ROLL_OUT, 13),
+ IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
+};
+
+static const struct iio_chan_spec adis16334_channels[] = {
+ ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14),
+ ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 14),
+ ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 14),
+ ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14),
+ ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14),
+ ADIS16400_TEMP_CHAN(ADIS16350_XTEMP_OUT, 12),
+ IIO_CHAN_SOFT_TIMESTAMP(ADIS16400_SCAN_TIMESTAMP),
+};
+
+static struct adis16400_chip_info adis16400_chips[] = {
+ [ADIS16300] = {
+ .channels = adis16300_channels,
+ .num_channels = ARRAY_SIZE(adis16300_channels),
+ .flags = ADIS16400_HAS_SLOW_MODE,
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
+ .accel_scale_micro = 5884,
+ .temp_scale_nano = 140000000, /* 0.14 C */
+ .temp_offset = 25000000 / 140000, /* 25 C = 0x00 */
+ .set_freq = adis16400_set_freq,
+ .get_freq = adis16400_get_freq,
+ },
+ [ADIS16334] = {
+ .channels = adis16334_channels,
+ .num_channels = ARRAY_SIZE(adis16334_channels),
+ .flags = ADIS16400_HAS_PROD_ID | ADIS16400_NO_BURST |
+ ADIS16400_HAS_SERIAL_NUMBER,
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
+ .accel_scale_micro = IIO_G_TO_M_S_2(1000), /* 1 mg */
+ .temp_scale_nano = 67850000, /* 0.06785 C */
+ .temp_offset = 25000000 / 67850, /* 25 C = 0x00 */
+ .set_freq = adis16334_set_freq,
+ .get_freq = adis16334_get_freq,
+ },
+ [ADIS16350] = {
+ .channels = adis16350_channels,
+ .num_channels = ARRAY_SIZE(adis16350_channels),
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(73260), /* 0.07326 deg/s */
+ .accel_scale_micro = IIO_G_TO_M_S_2(2522), /* 0.002522 g */
+ .temp_scale_nano = 145300000, /* 0.1453 C */
+ .temp_offset = 25000000 / 145300, /* 25 C = 0x00 */
+ .flags = ADIS16400_NO_BURST | ADIS16400_HAS_SLOW_MODE,
+ .set_freq = adis16400_set_freq,
+ .get_freq = adis16400_get_freq,
+ },
+ [ADIS16360] = {
+ .channels = adis16350_channels,
+ .num_channels = ARRAY_SIZE(adis16350_channels),
+ .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
+ ADIS16400_HAS_SERIAL_NUMBER,
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
+ .accel_scale_micro = IIO_G_TO_M_S_2(3333), /* 3.333 mg */
+ .temp_scale_nano = 136000000, /* 0.136 C */
+ .temp_offset = 25000000 / 136000, /* 25 C = 0x00 */
+ .set_freq = adis16400_set_freq,
+ .get_freq = adis16400_get_freq,
+ },
+ [ADIS16362] = {
+ .channels = adis16350_channels,
+ .num_channels = ARRAY_SIZE(adis16350_channels),
+ .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
+ ADIS16400_HAS_SERIAL_NUMBER,
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
+ .accel_scale_micro = IIO_G_TO_M_S_2(333), /* 0.333 mg */
+ .temp_scale_nano = 136000000, /* 0.136 C */
+ .temp_offset = 25000000 / 136000, /* 25 C = 0x00 */
+ .set_freq = adis16400_set_freq,
+ .get_freq = adis16400_get_freq,
+ },
+ [ADIS16364] = {
+ .channels = adis16350_channels,
+ .num_channels = ARRAY_SIZE(adis16350_channels),
+ .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE |
+ ADIS16400_HAS_SERIAL_NUMBER,
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
+ .accel_scale_micro = IIO_G_TO_M_S_2(1000), /* 1 mg */
+ .temp_scale_nano = 136000000, /* 0.136 C */
+ .temp_offset = 25000000 / 136000, /* 25 C = 0x00 */
+ .set_freq = adis16400_set_freq,
+ .get_freq = adis16400_get_freq,
+ },
+ [ADIS16400] = {
+ .channels = adis16400_channels,
+ .num_channels = ARRAY_SIZE(adis16400_channels),
+ .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE,
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */
+ .accel_scale_micro = IIO_G_TO_M_S_2(3333), /* 3.333 mg */
+ .temp_scale_nano = 140000000, /* 0.14 C */
+ .temp_offset = 25000000 / 140000, /* 25 C = 0x00 */
+ .set_freq = adis16400_set_freq,
+ .get_freq = adis16400_get_freq,
+ },
+ [ADIS16448] = {
+ .channels = adis16448_channels,
+ .num_channels = ARRAY_SIZE(adis16448_channels),
+ .flags = ADIS16400_HAS_PROD_ID |
+ ADIS16400_HAS_SERIAL_NUMBER |
+ ADIS16400_BURST_DIAG_STAT,
+ .gyro_scale_micro = IIO_DEGREE_TO_RAD(10000), /* 0.01 deg/s */
+ .accel_scale_micro = IIO_G_TO_M_S_2(833), /* 1/1200 g */
+ .temp_scale_nano = 73860000, /* 0.07386 C */
+ .temp_offset = 31000000 / 73860, /* 31 C = 0x00 */
+ .set_freq = adis16334_set_freq,
+ .get_freq = adis16334_get_freq,
+ }
+};
+
+static const struct iio_info adis16400_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &adis16400_read_raw,
+ .write_raw = &adis16400_write_raw,
+ .update_scan_mode = adis16400_update_scan_mode,
+ .debugfs_reg_access = adis_debugfs_reg_access,
+};
+
+static const char * const adis16400_status_error_msgs[] = {
+ [ADIS16400_DIAG_STAT_ZACCL_FAIL] = "Z-axis accelerometer self-test failure",
+ [ADIS16400_DIAG_STAT_YACCL_FAIL] = "Y-axis accelerometer self-test failure",
+ [ADIS16400_DIAG_STAT_XACCL_FAIL] = "X-axis accelerometer self-test failure",
+ [ADIS16400_DIAG_STAT_XGYRO_FAIL] = "X-axis gyroscope self-test failure",
+ [ADIS16400_DIAG_STAT_YGYRO_FAIL] = "Y-axis gyroscope self-test failure",
+ [ADIS16400_DIAG_STAT_ZGYRO_FAIL] = "Z-axis gyroscope self-test failure",
+ [ADIS16400_DIAG_STAT_ALARM2] = "Alarm 2 active",
+ [ADIS16400_DIAG_STAT_ALARM1] = "Alarm 1 active",
+ [ADIS16400_DIAG_STAT_FLASH_CHK] = "Flash checksum error",
+ [ADIS16400_DIAG_STAT_SELF_TEST] = "Self test error",
+ [ADIS16400_DIAG_STAT_OVERFLOW] = "Sensor overrange",
+ [ADIS16400_DIAG_STAT_SPI_FAIL] = "SPI failure",
+ [ADIS16400_DIAG_STAT_FLASH_UPT] = "Flash update failed",
+ [ADIS16400_DIAG_STAT_POWER_HIGH] = "Power supply above 5.25V",
+ [ADIS16400_DIAG_STAT_POWER_LOW] = "Power supply below 4.75V",
+};
+
+static const struct adis_data adis16400_data = {
+ .msc_ctrl_reg = ADIS16400_MSC_CTRL,
+ .glob_cmd_reg = ADIS16400_GLOB_CMD,
+ .diag_stat_reg = ADIS16400_DIAG_STAT,
+
+ .read_delay = 50,
+ .write_delay = 50,
+
+ .self_test_mask = ADIS16400_MSC_CTRL_MEM_TEST,
+ .startup_delay = ADIS16400_STARTUP_DELAY,
+
+ .status_error_msgs = adis16400_status_error_msgs,
+ .status_error_mask = BIT(ADIS16400_DIAG_STAT_ZACCL_FAIL) |
+ BIT(ADIS16400_DIAG_STAT_YACCL_FAIL) |
+ BIT(ADIS16400_DIAG_STAT_XACCL_FAIL) |
+ BIT(ADIS16400_DIAG_STAT_XGYRO_FAIL) |
+ BIT(ADIS16400_DIAG_STAT_YGYRO_FAIL) |
+ BIT(ADIS16400_DIAG_STAT_ZGYRO_FAIL) |
+ BIT(ADIS16400_DIAG_STAT_ALARM2) |
+ BIT(ADIS16400_DIAG_STAT_ALARM1) |
+ BIT(ADIS16400_DIAG_STAT_FLASH_CHK) |
+ BIT(ADIS16400_DIAG_STAT_SELF_TEST) |
+ BIT(ADIS16400_DIAG_STAT_OVERFLOW) |
+ BIT(ADIS16400_DIAG_STAT_SPI_FAIL) |
+ BIT(ADIS16400_DIAG_STAT_FLASH_UPT) |
+ BIT(ADIS16400_DIAG_STAT_POWER_HIGH) |
+ BIT(ADIS16400_DIAG_STAT_POWER_LOW),
+};
+
+static void adis16400_setup_chan_mask(struct adis16400_state *st)
+{
+ const struct adis16400_chip_info *chip_info = st->variant;
+ unsigned i;
+
+ for (i = 0; i < chip_info->num_channels; i++) {
+ const struct iio_chan_spec *ch = &chip_info->channels[i];
+
+ if (ch->scan_index >= 0 &&
+ ch->scan_index != ADIS16400_SCAN_TIMESTAMP)
+ st->avail_scan_mask[0] |= BIT(ch->scan_index);
+ }
+}
+
+static int adis16400_probe(struct spi_device *spi)
+{
+ struct adis16400_state *st;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ /* this is only used for removal purposes */
+ spi_set_drvdata(spi, indio_dev);
+
+ /* setup the industrialio driver allocated elements */
+ st->variant = &adis16400_chips[spi_get_device_id(spi)->driver_data];
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->channels = st->variant->channels;
+ indio_dev->num_channels = st->variant->num_channels;
+ indio_dev->info = &adis16400_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ if (!(st->variant->flags & ADIS16400_NO_BURST)) {
+ adis16400_setup_chan_mask(st);
+ indio_dev->available_scan_masks = st->avail_scan_mask;
+ }
+
+ ret = adis_init(&st->adis, indio_dev, spi, &adis16400_data);
+ if (ret)
+ return ret;
+
+ ret = adis_setup_buffer_and_trigger(&st->adis, indio_dev,
+ adis16400_trigger_handler);
+ if (ret)
+ return ret;
+
+ /* Get the device into a sane initial state */
+ ret = adis16400_initial_setup(indio_dev);
+ if (ret)
+ goto error_cleanup_buffer;
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_cleanup_buffer;
+
+ adis16400_debugfs_init(indio_dev);
+ return 0;
+
+error_cleanup_buffer:
+ adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
+ return ret;
+}
+
+static int adis16400_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct adis16400_state *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ adis16400_stop_device(indio_dev);
+
+ adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
+
+ return 0;
+}
+
+static const struct spi_device_id adis16400_id[] = {
+ {"adis16300", ADIS16300},
+ {"adis16334", ADIS16334},
+ {"adis16350", ADIS16350},
+ {"adis16354", ADIS16350},
+ {"adis16355", ADIS16350},
+ {"adis16360", ADIS16360},
+ {"adis16362", ADIS16362},
+ {"adis16364", ADIS16364},
+ {"adis16365", ADIS16360},
+ {"adis16400", ADIS16400},
+ {"adis16405", ADIS16400},
+ {"adis16448", ADIS16448},
+ {}
+};
+MODULE_DEVICE_TABLE(spi, adis16400_id);
+
+static struct spi_driver adis16400_driver = {
+ .driver = {
+ .name = "adis16400",
+ .owner = THIS_MODULE,
+ },
+ .id_table = adis16400_id,
+ .probe = adis16400_probe,
+ .remove = adis16400_remove,
+};
+module_spi_driver(adis16400_driver);
+
+MODULE_AUTHOR("Manuel Stahl <manuel.stahl@iis.fraunhofer.de>");
+MODULE_DESCRIPTION("Analog Devices ADIS16400/5 IMU SPI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/iio/imu/adis16480.c b/kernel/drivers/iio/imu/adis16480.c
new file mode 100644
index 000000000..989605dd6
--- /dev/null
+++ b/kernel/drivers/iio/imu/adis16480.c
@@ -0,0 +1,882 @@
+/*
+ * ADIS16480 and similar IMUs driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/imu/adis.h>
+
+#include <linux/debugfs.h>
+
+#define ADIS16480_PAGE_SIZE 0x80
+
+#define ADIS16480_REG(page, reg) ((page) * ADIS16480_PAGE_SIZE + (reg))
+
+#define ADIS16480_REG_PAGE_ID 0x00 /* Same address on each page */
+#define ADIS16480_REG_SEQ_CNT ADIS16480_REG(0x00, 0x06)
+#define ADIS16480_REG_SYS_E_FLA ADIS16480_REG(0x00, 0x08)
+#define ADIS16480_REG_DIAG_STS ADIS16480_REG(0x00, 0x0A)
+#define ADIS16480_REG_ALM_STS ADIS16480_REG(0x00, 0x0C)
+#define ADIS16480_REG_TEMP_OUT ADIS16480_REG(0x00, 0x0E)
+#define ADIS16480_REG_X_GYRO_OUT ADIS16480_REG(0x00, 0x10)
+#define ADIS16480_REG_Y_GYRO_OUT ADIS16480_REG(0x00, 0x14)
+#define ADIS16480_REG_Z_GYRO_OUT ADIS16480_REG(0x00, 0x18)
+#define ADIS16480_REG_X_ACCEL_OUT ADIS16480_REG(0x00, 0x1C)
+#define ADIS16480_REG_Y_ACCEL_OUT ADIS16480_REG(0x00, 0x20)
+#define ADIS16480_REG_Z_ACCEL_OUT ADIS16480_REG(0x00, 0x24)
+#define ADIS16480_REG_X_MAGN_OUT ADIS16480_REG(0x00, 0x28)
+#define ADIS16480_REG_Y_MAGN_OUT ADIS16480_REG(0x00, 0x2A)
+#define ADIS16480_REG_Z_MAGN_OUT ADIS16480_REG(0x00, 0x2C)
+#define ADIS16480_REG_BAROM_OUT ADIS16480_REG(0x00, 0x2E)
+#define ADIS16480_REG_X_DELTAANG_OUT ADIS16480_REG(0x00, 0x40)
+#define ADIS16480_REG_Y_DELTAANG_OUT ADIS16480_REG(0x00, 0x44)
+#define ADIS16480_REG_Z_DELTAANG_OUT ADIS16480_REG(0x00, 0x48)
+#define ADIS16480_REG_X_DELTAVEL_OUT ADIS16480_REG(0x00, 0x4C)
+#define ADIS16480_REG_Y_DELTAVEL_OUT ADIS16480_REG(0x00, 0x50)
+#define ADIS16480_REG_Z_DELTAVEL_OUT ADIS16480_REG(0x00, 0x54)
+#define ADIS16480_REG_PROD_ID ADIS16480_REG(0x00, 0x7E)
+
+#define ADIS16480_REG_X_GYRO_SCALE ADIS16480_REG(0x02, 0x04)
+#define ADIS16480_REG_Y_GYRO_SCALE ADIS16480_REG(0x02, 0x06)
+#define ADIS16480_REG_Z_GYRO_SCALE ADIS16480_REG(0x02, 0x08)
+#define ADIS16480_REG_X_ACCEL_SCALE ADIS16480_REG(0x02, 0x0A)
+#define ADIS16480_REG_Y_ACCEL_SCALE ADIS16480_REG(0x02, 0x0C)
+#define ADIS16480_REG_Z_ACCEL_SCALE ADIS16480_REG(0x02, 0x0E)
+#define ADIS16480_REG_X_GYRO_BIAS ADIS16480_REG(0x02, 0x10)
+#define ADIS16480_REG_Y_GYRO_BIAS ADIS16480_REG(0x02, 0x14)
+#define ADIS16480_REG_Z_GYRO_BIAS ADIS16480_REG(0x02, 0x18)
+#define ADIS16480_REG_X_ACCEL_BIAS ADIS16480_REG(0x02, 0x1C)
+#define ADIS16480_REG_Y_ACCEL_BIAS ADIS16480_REG(0x02, 0x20)
+#define ADIS16480_REG_Z_ACCEL_BIAS ADIS16480_REG(0x02, 0x24)
+#define ADIS16480_REG_X_HARD_IRON ADIS16480_REG(0x02, 0x28)
+#define ADIS16480_REG_Y_HARD_IRON ADIS16480_REG(0x02, 0x2A)
+#define ADIS16480_REG_Z_HARD_IRON ADIS16480_REG(0x02, 0x2C)
+#define ADIS16480_REG_BAROM_BIAS ADIS16480_REG(0x02, 0x40)
+#define ADIS16480_REG_FLASH_CNT ADIS16480_REG(0x02, 0x7C)
+
+#define ADIS16480_REG_GLOB_CMD ADIS16480_REG(0x03, 0x02)
+#define ADIS16480_REG_FNCTIO_CTRL ADIS16480_REG(0x03, 0x06)
+#define ADIS16480_REG_GPIO_CTRL ADIS16480_REG(0x03, 0x08)
+#define ADIS16480_REG_CONFIG ADIS16480_REG(0x03, 0x0A)
+#define ADIS16480_REG_DEC_RATE ADIS16480_REG(0x03, 0x0C)
+#define ADIS16480_REG_SLP_CNT ADIS16480_REG(0x03, 0x10)
+#define ADIS16480_REG_FILTER_BNK0 ADIS16480_REG(0x03, 0x16)
+#define ADIS16480_REG_FILTER_BNK1 ADIS16480_REG(0x03, 0x18)
+#define ADIS16480_REG_ALM_CNFG0 ADIS16480_REG(0x03, 0x20)
+#define ADIS16480_REG_ALM_CNFG1 ADIS16480_REG(0x03, 0x22)
+#define ADIS16480_REG_ALM_CNFG2 ADIS16480_REG(0x03, 0x24)
+#define ADIS16480_REG_XG_ALM_MAGN ADIS16480_REG(0x03, 0x28)
+#define ADIS16480_REG_YG_ALM_MAGN ADIS16480_REG(0x03, 0x2A)
+#define ADIS16480_REG_ZG_ALM_MAGN ADIS16480_REG(0x03, 0x2C)
+#define ADIS16480_REG_XA_ALM_MAGN ADIS16480_REG(0x03, 0x2E)
+#define ADIS16480_REG_YA_ALM_MAGN ADIS16480_REG(0x03, 0x30)
+#define ADIS16480_REG_ZA_ALM_MAGN ADIS16480_REG(0x03, 0x32)
+#define ADIS16480_REG_XM_ALM_MAGN ADIS16480_REG(0x03, 0x34)
+#define ADIS16480_REG_YM_ALM_MAGN ADIS16480_REG(0x03, 0x36)
+#define ADIS16480_REG_ZM_ALM_MAGN ADIS16480_REG(0x03, 0x38)
+#define ADIS16480_REG_BR_ALM_MAGN ADIS16480_REG(0x03, 0x3A)
+#define ADIS16480_REG_FIRM_REV ADIS16480_REG(0x03, 0x78)
+#define ADIS16480_REG_FIRM_DM ADIS16480_REG(0x03, 0x7A)
+#define ADIS16480_REG_FIRM_Y ADIS16480_REG(0x03, 0x7C)
+
+#define ADIS16480_REG_SERIAL_NUM ADIS16480_REG(0x04, 0x20)
+
+/* Each filter coefficent bank spans two pages */
+#define ADIS16480_FIR_COEF(page) (x < 60 ? ADIS16480_REG(page, (x) + 8) : \
+ ADIS16480_REG((page) + 1, (x) - 60 + 8))
+#define ADIS16480_FIR_COEF_A(x) ADIS16480_FIR_COEF(0x05, (x))
+#define ADIS16480_FIR_COEF_B(x) ADIS16480_FIR_COEF(0x07, (x))
+#define ADIS16480_FIR_COEF_C(x) ADIS16480_FIR_COEF(0x09, (x))
+#define ADIS16480_FIR_COEF_D(x) ADIS16480_FIR_COEF(0x0B, (x))
+
+struct adis16480_chip_info {
+ unsigned int num_channels;
+ const struct iio_chan_spec *channels;
+};
+
+struct adis16480 {
+ const struct adis16480_chip_info *chip_info;
+
+ struct adis adis;
+};
+
+#ifdef CONFIG_DEBUG_FS
+
+static ssize_t adis16480_show_firmware_revision(struct file *file,
+ char __user *userbuf, size_t count, loff_t *ppos)
+{
+ struct adis16480 *adis16480 = file->private_data;
+ char buf[7];
+ size_t len;
+ u16 rev;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_REV, &rev);
+ if (ret < 0)
+ return ret;
+
+ len = scnprintf(buf, sizeof(buf), "%x.%x\n", rev >> 8, rev & 0xff);
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+
+static const struct file_operations adis16480_firmware_revision_fops = {
+ .open = simple_open,
+ .read = adis16480_show_firmware_revision,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE,
+};
+
+static ssize_t adis16480_show_firmware_date(struct file *file,
+ char __user *userbuf, size_t count, loff_t *ppos)
+{
+ struct adis16480 *adis16480 = file->private_data;
+ u16 md, year;
+ char buf[12];
+ size_t len;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_Y, &year);
+ if (ret < 0)
+ return ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_DM, &md);
+ if (ret < 0)
+ return ret;
+
+ len = snprintf(buf, sizeof(buf), "%.2x-%.2x-%.4x\n",
+ md >> 8, md & 0xff, year);
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+
+static const struct file_operations adis16480_firmware_date_fops = {
+ .open = simple_open,
+ .read = adis16480_show_firmware_date,
+ .llseek = default_llseek,
+ .owner = THIS_MODULE,
+};
+
+static int adis16480_show_serial_number(void *arg, u64 *val)
+{
+ struct adis16480 *adis16480 = arg;
+ u16 serial;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_SERIAL_NUM,
+ &serial);
+ if (ret < 0)
+ return ret;
+
+ *val = serial;
+
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(adis16480_serial_number_fops,
+ adis16480_show_serial_number, NULL, "0x%.4llx\n");
+
+static int adis16480_show_product_id(void *arg, u64 *val)
+{
+ struct adis16480 *adis16480 = arg;
+ u16 prod_id;
+ int ret;
+
+ ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_PROD_ID,
+ &prod_id);
+ if (ret < 0)
+ return ret;
+
+ *val = prod_id;
+
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(adis16480_product_id_fops,
+ adis16480_show_product_id, NULL, "%llu\n");
+
+static int adis16480_show_flash_count(void *arg, u64 *val)
+{
+ struct adis16480 *adis16480 = arg;
+ u32 flash_count;
+ int ret;
+
+ ret = adis_read_reg_32(&adis16480->adis, ADIS16480_REG_FLASH_CNT,
+ &flash_count);
+ if (ret < 0)
+ return ret;
+
+ *val = flash_count;
+
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(adis16480_flash_count_fops,
+ adis16480_show_flash_count, NULL, "%lld\n");
+
+static int adis16480_debugfs_init(struct iio_dev *indio_dev)
+{
+ struct adis16480 *adis16480 = iio_priv(indio_dev);
+
+ debugfs_create_file("firmware_revision", 0400,
+ indio_dev->debugfs_dentry, adis16480,
+ &adis16480_firmware_revision_fops);
+ debugfs_create_file("firmware_date", 0400, indio_dev->debugfs_dentry,
+ adis16480, &adis16480_firmware_date_fops);
+ debugfs_create_file("serial_number", 0400, indio_dev->debugfs_dentry,
+ adis16480, &adis16480_serial_number_fops);
+ debugfs_create_file("product_id", 0400, indio_dev->debugfs_dentry,
+ adis16480, &adis16480_product_id_fops);
+ debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry,
+ adis16480, &adis16480_flash_count_fops);
+
+ return 0;
+}
+
+#else
+
+static int adis16480_debugfs_init(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
+#endif
+
+static int adis16480_set_freq(struct iio_dev *indio_dev, int val, int val2)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int t;
+
+ t = val * 1000 + val2 / 1000;
+ if (t <= 0)
+ return -EINVAL;
+
+ t = 2460000 / t;
+ if (t > 2048)
+ t = 2048;
+
+ if (t != 0)
+ t--;
+
+ return adis_write_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, t);
+}
+
+static int adis16480_get_freq(struct iio_dev *indio_dev, int *val, int *val2)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t t;
+ int ret;
+ unsigned freq;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, &t);
+ if (ret < 0)
+ return ret;
+
+ freq = 2460000 / (t + 1);
+ *val = freq / 1000;
+ *val2 = (freq % 1000) * 1000;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+enum {
+ ADIS16480_SCAN_GYRO_X,
+ ADIS16480_SCAN_GYRO_Y,
+ ADIS16480_SCAN_GYRO_Z,
+ ADIS16480_SCAN_ACCEL_X,
+ ADIS16480_SCAN_ACCEL_Y,
+ ADIS16480_SCAN_ACCEL_Z,
+ ADIS16480_SCAN_MAGN_X,
+ ADIS16480_SCAN_MAGN_Y,
+ ADIS16480_SCAN_MAGN_Z,
+ ADIS16480_SCAN_BARO,
+ ADIS16480_SCAN_TEMP,
+};
+
+static const unsigned int adis16480_calibbias_regs[] = {
+ [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_BIAS,
+ [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_BIAS,
+ [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_BIAS,
+ [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_BIAS,
+ [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_BIAS,
+ [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_BIAS,
+ [ADIS16480_SCAN_MAGN_X] = ADIS16480_REG_X_HARD_IRON,
+ [ADIS16480_SCAN_MAGN_Y] = ADIS16480_REG_Y_HARD_IRON,
+ [ADIS16480_SCAN_MAGN_Z] = ADIS16480_REG_Z_HARD_IRON,
+ [ADIS16480_SCAN_BARO] = ADIS16480_REG_BAROM_BIAS,
+};
+
+static const unsigned int adis16480_calibscale_regs[] = {
+ [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_SCALE,
+ [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_SCALE,
+ [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_SCALE,
+ [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_SCALE,
+ [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_SCALE,
+ [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_SCALE,
+};
+
+static int adis16480_set_calibbias(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int bias)
+{
+ unsigned int reg = adis16480_calibbias_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+
+ switch (chan->type) {
+ case IIO_MAGN:
+ case IIO_PRESSURE:
+ if (bias < -0x8000 || bias >= 0x8000)
+ return -EINVAL;
+ return adis_write_reg_16(&st->adis, reg, bias);
+ case IIO_ANGL_VEL:
+ case IIO_ACCEL:
+ return adis_write_reg_32(&st->adis, reg, bias);
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int adis16480_get_calibbias(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *bias)
+{
+ unsigned int reg = adis16480_calibbias_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t val16;
+ uint32_t val32;
+ int ret;
+
+ switch (chan->type) {
+ case IIO_MAGN:
+ case IIO_PRESSURE:
+ ret = adis_read_reg_16(&st->adis, reg, &val16);
+ *bias = sign_extend32(val16, 15);
+ break;
+ case IIO_ANGL_VEL:
+ case IIO_ACCEL:
+ ret = adis_read_reg_32(&st->adis, reg, &val32);
+ *bias = sign_extend32(val32, 31);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+static int adis16480_set_calibscale(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int scale)
+{
+ unsigned int reg = adis16480_calibscale_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+
+ if (scale < -0x8000 || scale >= 0x8000)
+ return -EINVAL;
+
+ return adis_write_reg_16(&st->adis, reg, scale);
+}
+
+static int adis16480_get_calibscale(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *scale)
+{
+ unsigned int reg = adis16480_calibscale_regs[chan->scan_index];
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t val16;
+ int ret;
+
+ ret = adis_read_reg_16(&st->adis, reg, &val16);
+ if (ret < 0)
+ return ret;
+
+ *scale = sign_extend32(val16, 15);
+ return IIO_VAL_INT;
+}
+
+static const unsigned int adis16480_def_filter_freqs[] = {
+ 310,
+ 55,
+ 275,
+ 63,
+};
+
+static const unsigned int ad16480_filter_data[][2] = {
+ [ADIS16480_SCAN_GYRO_X] = { ADIS16480_REG_FILTER_BNK0, 0 },
+ [ADIS16480_SCAN_GYRO_Y] = { ADIS16480_REG_FILTER_BNK0, 3 },
+ [ADIS16480_SCAN_GYRO_Z] = { ADIS16480_REG_FILTER_BNK0, 6 },
+ [ADIS16480_SCAN_ACCEL_X] = { ADIS16480_REG_FILTER_BNK0, 9 },
+ [ADIS16480_SCAN_ACCEL_Y] = { ADIS16480_REG_FILTER_BNK0, 12 },
+ [ADIS16480_SCAN_ACCEL_Z] = { ADIS16480_REG_FILTER_BNK1, 0 },
+ [ADIS16480_SCAN_MAGN_X] = { ADIS16480_REG_FILTER_BNK1, 3 },
+ [ADIS16480_SCAN_MAGN_Y] = { ADIS16480_REG_FILTER_BNK1, 6 },
+ [ADIS16480_SCAN_MAGN_Z] = { ADIS16480_REG_FILTER_BNK1, 9 },
+};
+
+static int adis16480_get_filter_freq(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *freq)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int enable_mask, offset, reg;
+ uint16_t val;
+ int ret;
+
+ reg = ad16480_filter_data[chan->scan_index][0];
+ offset = ad16480_filter_data[chan->scan_index][1];
+ enable_mask = BIT(offset + 2);
+
+ ret = adis_read_reg_16(&st->adis, reg, &val);
+ if (ret < 0)
+ return ret;
+
+ if (!(val & enable_mask))
+ *freq = 0;
+ else
+ *freq = adis16480_def_filter_freqs[(val >> offset) & 0x3];
+
+ return IIO_VAL_INT;
+}
+
+static int adis16480_set_filter_freq(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, unsigned int freq)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ unsigned int enable_mask, offset, reg;
+ unsigned int diff, best_diff;
+ unsigned int i, best_freq;
+ uint16_t val;
+ int ret;
+
+ reg = ad16480_filter_data[chan->scan_index][0];
+ offset = ad16480_filter_data[chan->scan_index][1];
+ enable_mask = BIT(offset + 2);
+
+ ret = adis_read_reg_16(&st->adis, reg, &val);
+ if (ret < 0)
+ return ret;
+
+ if (freq == 0) {
+ val &= ~enable_mask;
+ } else {
+ best_freq = 0;
+ best_diff = 310;
+ for (i = 0; i < ARRAY_SIZE(adis16480_def_filter_freqs); i++) {
+ if (adis16480_def_filter_freqs[i] >= freq) {
+ diff = adis16480_def_filter_freqs[i] - freq;
+ if (diff < best_diff) {
+ best_diff = diff;
+ best_freq = i;
+ }
+ }
+ }
+
+ val &= ~(0x3 << offset);
+ val |= best_freq << offset;
+ val |= enable_mask;
+ }
+
+ return adis_write_reg_16(&st->adis, reg, val);
+}
+
+static int adis16480_read_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *val, int *val2, long info)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ return adis_single_conversion(indio_dev, chan, 0, val);
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ *val = 0;
+ *val2 = IIO_DEGREE_TO_RAD(20000); /* 0.02 degree/sec */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_ACCEL:
+ *val = 0;
+ *val2 = IIO_G_TO_M_S_2(800); /* 0.8 mg */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_MAGN:
+ *val = 0;
+ *val2 = 100; /* 0.0001 gauss */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_TEMP:
+ *val = 5;
+ *val2 = 650000; /* 5.65 milli degree Celsius */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_PRESSURE:
+ *val = 0;
+ *val2 = 4000; /* 40ubar = 0.004 kPa */
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ /* Only the temperature channel has a offset */
+ *val = 4425; /* 25 degree Celsius = 0x0000 */
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return adis16480_get_calibbias(indio_dev, chan, val);
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return adis16480_get_calibscale(indio_dev, chan, val);
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ return adis16480_get_filter_freq(indio_dev, chan, val);
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return adis16480_get_freq(indio_dev, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int adis16480_write_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int val, int val2, long info)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return adis16480_set_calibbias(indio_dev, chan, val);
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return adis16480_set_calibscale(indio_dev, chan, val);
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ return adis16480_set_filter_freq(indio_dev, chan, val);
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return adis16480_set_freq(indio_dev, val, val2);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+#define ADIS16480_MOD_CHANNEL(_type, _mod, _address, _si, _info_sep, _bits) \
+ { \
+ .type = (_type), \
+ .modified = 1, \
+ .channel2 = (_mod), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS) | \
+ _info_sep, \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = (_address), \
+ .scan_index = (_si), \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (_bits), \
+ .storagebits = (_bits), \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+#define ADIS16480_GYRO_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_ANGL_VEL, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _GYRO_OUT, ADIS16480_SCAN_GYRO_ ## _mod, \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
+ BIT(IIO_CHAN_INFO_CALIBSCALE), \
+ 32)
+
+#define ADIS16480_ACCEL_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_ACCEL, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _ACCEL_OUT, ADIS16480_SCAN_ACCEL_ ## _mod, \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
+ BIT(IIO_CHAN_INFO_CALIBSCALE), \
+ 32)
+
+#define ADIS16480_MAGN_CHANNEL(_mod) \
+ ADIS16480_MOD_CHANNEL(IIO_MAGN, IIO_MOD_ ## _mod, \
+ ADIS16480_REG_ ## _mod ## _MAGN_OUT, ADIS16480_SCAN_MAGN_ ## _mod, \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ 16)
+
+#define ADIS16480_PRESSURE_CHANNEL() \
+ { \
+ .type = IIO_PRESSURE, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = ADIS16480_REG_BAROM_OUT, \
+ .scan_index = ADIS16480_SCAN_BARO, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 32, \
+ .storagebits = 32, \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+#define ADIS16480_TEMP_CHANNEL() { \
+ .type = IIO_TEMP, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = ADIS16480_REG_TEMP_OUT, \
+ .scan_index = ADIS16480_SCAN_TEMP, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+static const struct iio_chan_spec adis16480_channels[] = {
+ ADIS16480_GYRO_CHANNEL(X),
+ ADIS16480_GYRO_CHANNEL(Y),
+ ADIS16480_GYRO_CHANNEL(Z),
+ ADIS16480_ACCEL_CHANNEL(X),
+ ADIS16480_ACCEL_CHANNEL(Y),
+ ADIS16480_ACCEL_CHANNEL(Z),
+ ADIS16480_MAGN_CHANNEL(X),
+ ADIS16480_MAGN_CHANNEL(Y),
+ ADIS16480_MAGN_CHANNEL(Z),
+ ADIS16480_PRESSURE_CHANNEL(),
+ ADIS16480_TEMP_CHANNEL(),
+ IIO_CHAN_SOFT_TIMESTAMP(11)
+};
+
+static const struct iio_chan_spec adis16485_channels[] = {
+ ADIS16480_GYRO_CHANNEL(X),
+ ADIS16480_GYRO_CHANNEL(Y),
+ ADIS16480_GYRO_CHANNEL(Z),
+ ADIS16480_ACCEL_CHANNEL(X),
+ ADIS16480_ACCEL_CHANNEL(Y),
+ ADIS16480_ACCEL_CHANNEL(Z),
+ ADIS16480_TEMP_CHANNEL(),
+ IIO_CHAN_SOFT_TIMESTAMP(7)
+};
+
+enum adis16480_variant {
+ ADIS16375,
+ ADIS16480,
+ ADIS16485,
+ ADIS16488,
+};
+
+static const struct adis16480_chip_info adis16480_chip_info[] = {
+ [ADIS16375] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ },
+ [ADIS16480] = {
+ .channels = adis16480_channels,
+ .num_channels = ARRAY_SIZE(adis16480_channels),
+ },
+ [ADIS16485] = {
+ .channels = adis16485_channels,
+ .num_channels = ARRAY_SIZE(adis16485_channels),
+ },
+ [ADIS16488] = {
+ .channels = adis16480_channels,
+ .num_channels = ARRAY_SIZE(adis16480_channels),
+ },
+};
+
+static const struct iio_info adis16480_info = {
+ .read_raw = &adis16480_read_raw,
+ .write_raw = &adis16480_write_raw,
+ .update_scan_mode = adis_update_scan_mode,
+ .driver_module = THIS_MODULE,
+};
+
+static int adis16480_stop_device(struct iio_dev *indio_dev)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = adis_write_reg_16(&st->adis, ADIS16480_REG_SLP_CNT, BIT(9));
+ if (ret)
+ dev_err(&indio_dev->dev,
+ "Could not power down device: %d\n", ret);
+
+ return ret;
+}
+
+static int adis16480_enable_irq(struct adis *adis, bool enable)
+{
+ return adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL,
+ enable ? BIT(3) : 0);
+}
+
+static int adis16480_initial_setup(struct iio_dev *indio_dev)
+{
+ struct adis16480 *st = iio_priv(indio_dev);
+ uint16_t prod_id;
+ unsigned int device_id;
+ int ret;
+
+ adis_reset(&st->adis);
+ msleep(70);
+
+ ret = adis_write_reg_16(&st->adis, ADIS16480_REG_GLOB_CMD, BIT(1));
+ if (ret)
+ return ret;
+ msleep(30);
+
+ ret = adis_check_status(&st->adis);
+ if (ret)
+ return ret;
+
+ ret = adis_read_reg_16(&st->adis, ADIS16480_REG_PROD_ID, &prod_id);
+ if (ret)
+ return ret;
+
+ sscanf(indio_dev->name, "adis%u\n", &device_id);
+
+ if (prod_id != device_id)
+ dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.",
+ device_id, prod_id);
+
+ return 0;
+}
+
+#define ADIS16480_DIAG_STAT_XGYRO_FAIL 0
+#define ADIS16480_DIAG_STAT_YGYRO_FAIL 1
+#define ADIS16480_DIAG_STAT_ZGYRO_FAIL 2
+#define ADIS16480_DIAG_STAT_XACCL_FAIL 3
+#define ADIS16480_DIAG_STAT_YACCL_FAIL 4
+#define ADIS16480_DIAG_STAT_ZACCL_FAIL 5
+#define ADIS16480_DIAG_STAT_XMAGN_FAIL 8
+#define ADIS16480_DIAG_STAT_YMAGN_FAIL 9
+#define ADIS16480_DIAG_STAT_ZMAGN_FAIL 10
+#define ADIS16480_DIAG_STAT_BARO_FAIL 11
+
+static const char * const adis16480_status_error_msgs[] = {
+ [ADIS16480_DIAG_STAT_XGYRO_FAIL] = "X-axis gyroscope self-test failure",
+ [ADIS16480_DIAG_STAT_YGYRO_FAIL] = "Y-axis gyroscope self-test failure",
+ [ADIS16480_DIAG_STAT_ZGYRO_FAIL] = "Z-axis gyroscope self-test failure",
+ [ADIS16480_DIAG_STAT_XACCL_FAIL] = "X-axis accelerometer self-test failure",
+ [ADIS16480_DIAG_STAT_YACCL_FAIL] = "Y-axis accelerometer self-test failure",
+ [ADIS16480_DIAG_STAT_ZACCL_FAIL] = "Z-axis accelerometer self-test failure",
+ [ADIS16480_DIAG_STAT_XMAGN_FAIL] = "X-axis magnetometer self-test failure",
+ [ADIS16480_DIAG_STAT_YMAGN_FAIL] = "Y-axis magnetometer self-test failure",
+ [ADIS16480_DIAG_STAT_ZMAGN_FAIL] = "Z-axis magnetometer self-test failure",
+ [ADIS16480_DIAG_STAT_BARO_FAIL] = "Barometer self-test failure",
+};
+
+static const struct adis_data adis16480_data = {
+ .diag_stat_reg = ADIS16480_REG_DIAG_STS,
+ .glob_cmd_reg = ADIS16480_REG_GLOB_CMD,
+ .has_paging = true,
+
+ .read_delay = 5,
+ .write_delay = 5,
+
+ .status_error_msgs = adis16480_status_error_msgs,
+ .status_error_mask = BIT(ADIS16480_DIAG_STAT_XGYRO_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_YGYRO_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_ZGYRO_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_XACCL_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_YACCL_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_ZACCL_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_XMAGN_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_YMAGN_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_ZMAGN_FAIL) |
+ BIT(ADIS16480_DIAG_STAT_BARO_FAIL),
+
+ .enable_irq = adis16480_enable_irq,
+};
+
+static int adis16480_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct iio_dev *indio_dev;
+ struct adis16480 *st;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, indio_dev);
+
+ st = iio_priv(indio_dev);
+
+ st->chip_info = &adis16480_chip_info[id->driver_data];
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->channels = st->chip_info->channels;
+ indio_dev->num_channels = st->chip_info->num_channels;
+ indio_dev->info = &adis16480_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = adis_init(&st->adis, indio_dev, spi, &adis16480_data);
+ if (ret)
+ return ret;
+
+ ret = adis_setup_buffer_and_trigger(&st->adis, indio_dev, NULL);
+ if (ret)
+ return ret;
+
+ ret = adis16480_initial_setup(indio_dev);
+ if (ret)
+ goto error_cleanup_buffer;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_stop_device;
+
+ adis16480_debugfs_init(indio_dev);
+
+ return 0;
+
+error_stop_device:
+ adis16480_stop_device(indio_dev);
+error_cleanup_buffer:
+ adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
+ return ret;
+}
+
+static int adis16480_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct adis16480 *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ adis16480_stop_device(indio_dev);
+
+ adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
+
+ return 0;
+}
+
+static const struct spi_device_id adis16480_ids[] = {
+ { "adis16375", ADIS16375 },
+ { "adis16480", ADIS16480 },
+ { "adis16485", ADIS16485 },
+ { "adis16488", ADIS16488 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, adis16480_ids);
+
+static struct spi_driver adis16480_driver = {
+ .driver = {
+ .name = "adis16480",
+ .owner = THIS_MODULE,
+ },
+ .id_table = adis16480_ids,
+ .probe = adis16480_probe,
+ .remove = adis16480_remove,
+};
+module_spi_driver(adis16480_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices ADIS16480 IMU driver");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/iio/imu/adis_buffer.c b/kernel/drivers/iio/imu/adis_buffer.c
new file mode 100644
index 000000000..cb32b593f
--- /dev/null
+++ b/kernel/drivers/iio/imu/adis_buffer.c
@@ -0,0 +1,171 @@
+/*
+ * Common library for ADIS16XXX devices
+ *
+ * Copyright 2012 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/export.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/imu/adis.h>
+
+int adis_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct adis *adis = iio_device_get_drvdata(indio_dev);
+ const struct iio_chan_spec *chan;
+ unsigned int scan_count;
+ unsigned int i, j;
+ __be16 *tx, *rx;
+
+ kfree(adis->xfer);
+ kfree(adis->buffer);
+
+ scan_count = indio_dev->scan_bytes / 2;
+
+ adis->xfer = kcalloc(scan_count + 1, sizeof(*adis->xfer), GFP_KERNEL);
+ if (!adis->xfer)
+ return -ENOMEM;
+
+ adis->buffer = kzalloc(indio_dev->scan_bytes * 2, GFP_KERNEL);
+ if (!adis->buffer)
+ return -ENOMEM;
+
+ rx = adis->buffer;
+ tx = rx + indio_dev->scan_bytes;
+
+ spi_message_init(&adis->msg);
+
+ for (j = 0; j <= scan_count; j++) {
+ adis->xfer[j].bits_per_word = 8;
+ if (j != scan_count)
+ adis->xfer[j].cs_change = 1;
+ adis->xfer[j].len = 2;
+ adis->xfer[j].delay_usecs = adis->data->read_delay;
+ if (j < scan_count)
+ adis->xfer[j].tx_buf = &tx[j];
+ if (j >= 1)
+ adis->xfer[j].rx_buf = &rx[j - 1];
+ spi_message_add_tail(&adis->xfer[j], &adis->msg);
+ }
+
+ chan = indio_dev->channels;
+ for (i = 0; i < indio_dev->num_channels; i++, chan++) {
+ if (!test_bit(chan->scan_index, scan_mask))
+ continue;
+ if (chan->scan_type.storagebits == 32)
+ *tx++ = cpu_to_be16((chan->address + 2) << 8);
+ *tx++ = cpu_to_be16(chan->address << 8);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(adis_update_scan_mode);
+
+static irqreturn_t adis_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct adis *adis = iio_device_get_drvdata(indio_dev);
+ int ret;
+
+ if (!adis->buffer)
+ return -ENOMEM;
+
+ if (adis->data->has_paging) {
+ mutex_lock(&adis->txrx_lock);
+ if (adis->current_page != 0) {
+ adis->tx[0] = ADIS_WRITE_REG(ADIS_REG_PAGE_ID);
+ adis->tx[1] = 0;
+ spi_write(adis->spi, adis->tx, 2);
+ }
+ }
+
+ ret = spi_sync(adis->spi, &adis->msg);
+ if (ret)
+ dev_err(&adis->spi->dev, "Failed to read data: %d", ret);
+
+
+ if (adis->data->has_paging) {
+ adis->current_page = 0;
+ mutex_unlock(&adis->txrx_lock);
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, adis->buffer,
+ pf->timestamp);
+
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * adis_setup_buffer_and_trigger() - Sets up buffer and trigger for the adis device
+ * @adis: The adis device.
+ * @indio_dev: The IIO device.
+ * @trigger_handler: Optional trigger handler, may be NULL.
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ *
+ * This function sets up the buffer and trigger for a adis devices. If
+ * 'trigger_handler' is NULL the default trigger handler will be used. The
+ * default trigger handler will simply read the registers assigned to the
+ * currently active channels.
+ *
+ * adis_cleanup_buffer_and_trigger() should be called to free the resources
+ * allocated by this function.
+ */
+int adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
+ irqreturn_t (*trigger_handler)(int, void *))
+{
+ int ret;
+
+ if (!trigger_handler)
+ trigger_handler = adis_trigger_handler;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ trigger_handler, NULL);
+ if (ret)
+ return ret;
+
+ if (adis->spi->irq) {
+ ret = adis_probe_trigger(adis, indio_dev);
+ if (ret)
+ goto error_buffer_cleanup;
+ }
+ return 0;
+
+error_buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(adis_setup_buffer_and_trigger);
+
+/**
+ * adis_cleanup_buffer_and_trigger() - Free buffer and trigger resources
+ * @adis: The adis device.
+ * @indio_dev: The IIO device.
+ *
+ * Frees resources allocated by adis_setup_buffer_and_trigger()
+ */
+void adis_cleanup_buffer_and_trigger(struct adis *adis,
+ struct iio_dev *indio_dev)
+{
+ if (adis->spi->irq)
+ adis_remove_trigger(adis);
+ kfree(adis->buffer);
+ kfree(adis->xfer);
+ iio_triggered_buffer_cleanup(indio_dev);
+}
+EXPORT_SYMBOL_GPL(adis_cleanup_buffer_and_trigger);
diff --git a/kernel/drivers/iio/imu/adis_trigger.c b/kernel/drivers/iio/imu/adis_trigger.c
new file mode 100644
index 000000000..f53e9a803
--- /dev/null
+++ b/kernel/drivers/iio/imu/adis_trigger.c
@@ -0,0 +1,89 @@
+/*
+ * Common library for ADIS16XXX devices
+ *
+ * Copyright 2012 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/export.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/imu/adis.h>
+
+static int adis_data_rdy_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ struct adis *adis = iio_trigger_get_drvdata(trig);
+
+ return adis_enable_irq(adis, state);
+}
+
+static const struct iio_trigger_ops adis_trigger_ops = {
+ .owner = THIS_MODULE,
+ .set_trigger_state = &adis_data_rdy_trigger_set_state,
+};
+
+/**
+ * adis_probe_trigger() - Sets up trigger for a adis device
+ * @adis: The adis device
+ * @indio_dev: The IIO device
+ *
+ * Returns 0 on success or a negative error code
+ *
+ * adis_remove_trigger() should be used to free the trigger.
+ */
+int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
+{
+ int ret;
+
+ adis->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
+ indio_dev->id);
+ if (adis->trig == NULL)
+ return -ENOMEM;
+
+ ret = request_irq(adis->spi->irq,
+ &iio_trigger_generic_data_rdy_poll,
+ IRQF_TRIGGER_RISING,
+ indio_dev->name,
+ adis->trig);
+ if (ret)
+ goto error_free_trig;
+
+ adis->trig->dev.parent = &adis->spi->dev;
+ adis->trig->ops = &adis_trigger_ops;
+ iio_trigger_set_drvdata(adis->trig, adis);
+ ret = iio_trigger_register(adis->trig);
+
+ indio_dev->trig = iio_trigger_get(adis->trig);
+ if (ret)
+ goto error_free_irq;
+
+ return 0;
+
+error_free_irq:
+ free_irq(adis->spi->irq, adis->trig);
+error_free_trig:
+ iio_trigger_free(adis->trig);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(adis_probe_trigger);
+
+/**
+ * adis_remove_trigger() - Remove trigger for a adis devices
+ * @adis: The adis device
+ *
+ * Removes the trigger previously registered with adis_probe_trigger().
+ */
+void adis_remove_trigger(struct adis *adis)
+{
+ iio_trigger_unregister(adis->trig);
+ free_irq(adis->spi->irq, adis->trig);
+ iio_trigger_free(adis->trig);
+}
+EXPORT_SYMBOL_GPL(adis_remove_trigger);
diff --git a/kernel/drivers/iio/imu/inv_mpu6050/Kconfig b/kernel/drivers/iio/imu/inv_mpu6050/Kconfig
new file mode 100644
index 000000000..48fbc0bc7
--- /dev/null
+++ b/kernel/drivers/iio/imu/inv_mpu6050/Kconfig
@@ -0,0 +1,17 @@
+#
+# inv-mpu6050 drivers for Invensense MPU devices and combos
+#
+
+config INV_MPU6050_IIO
+ tristate "Invensense MPU6050 devices"
+ depends on I2C && SYSFS
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select I2C_MUX
+ help
+ This driver supports the Invensense MPU6050 devices.
+ This driver can also support MPU6500 in MPU6050 compatibility mode
+ and also in MPU6500 mode with some limitations.
+ It is a gyroscope/accelerometer combo device.
+ This driver can be built as a module. The module will be called
+ inv-mpu6050.
diff --git a/kernel/drivers/iio/imu/inv_mpu6050/Makefile b/kernel/drivers/iio/imu/inv_mpu6050/Makefile
new file mode 100644
index 000000000..f566f6a7b
--- /dev/null
+++ b/kernel/drivers/iio/imu/inv_mpu6050/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for Invensense MPU6050 device.
+#
+
+obj-$(CONFIG_INV_MPU6050_IIO) += inv-mpu6050.o
+inv-mpu6050-objs := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o inv_mpu_acpi.o
diff --git a/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c
new file mode 100644
index 000000000..1c982a56a
--- /dev/null
+++ b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c
@@ -0,0 +1,211 @@
+/*
+ * inv_mpu_acpi: ACPI processing for creating client devices
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#ifdef CONFIG_ACPI
+
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/dmi.h>
+#include <linux/acpi.h>
+#include "inv_mpu_iio.h"
+
+enum inv_mpu_product_name {
+ INV_MPU_NOT_MATCHED,
+ INV_MPU_ASUS_T100TA,
+};
+
+static enum inv_mpu_product_name matched_product_name;
+
+static int __init asus_t100_matched(const struct dmi_system_id *d)
+{
+ matched_product_name = INV_MPU_ASUS_T100TA;
+
+ return 0;
+}
+
+static const struct dmi_system_id inv_mpu_dev_list[] = {
+ {
+ .callback = asus_t100_matched,
+ .ident = "Asus Transformer Book T100",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "T100TA"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "1.0"),
+ },
+ },
+ /* Add more matching tables here..*/
+ {}
+};
+
+static int asus_acpi_get_sensor_info(struct acpi_device *adev,
+ struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ int i;
+ acpi_status status;
+ union acpi_object *cpm;
+
+ status = acpi_evaluate_object(adev->handle, "CNF0", NULL, &buffer);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ cpm = buffer.pointer;
+ for (i = 0; i < cpm->package.count; ++i) {
+ union acpi_object *elem;
+ int j;
+
+ elem = &(cpm->package.elements[i]);
+ for (j = 0; j < elem->package.count; ++j) {
+ union acpi_object *sub_elem;
+
+ sub_elem = &(elem->package.elements[j]);
+ if (sub_elem->type == ACPI_TYPE_STRING)
+ strlcpy(info->type, sub_elem->string.pointer,
+ sizeof(info->type));
+ else if (sub_elem->type == ACPI_TYPE_INTEGER) {
+ if (sub_elem->integer.value != client->addr) {
+ info->addr = sub_elem->integer.value;
+ break; /* Not a MPU6500 primary */
+ }
+ }
+ }
+ }
+
+ kfree(buffer.pointer);
+
+ return cpm->package.count;
+}
+
+static int acpi_i2c_check_resource(struct acpi_resource *ares, void *data)
+{
+ u32 *addr = data;
+
+ if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
+ struct acpi_resource_i2c_serialbus *sb;
+
+ sb = &ares->data.i2c_serial_bus;
+ if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_I2C) {
+ if (*addr)
+ *addr |= (sb->slave_address << 16);
+ else
+ *addr = sb->slave_address;
+ }
+ }
+
+ /* Tell the ACPI core that we already copied this address */
+ return 1;
+}
+
+static int inv_mpu_process_acpi_config(struct i2c_client *client,
+ unsigned short *primary_addr,
+ unsigned short *secondary_addr)
+{
+ const struct acpi_device_id *id;
+ struct acpi_device *adev;
+ u32 i2c_addr = 0;
+ LIST_HEAD(resources);
+ int ret;
+
+ id = acpi_match_device(client->dev.driver->acpi_match_table,
+ &client->dev);
+ if (!id)
+ return -ENODEV;
+
+ adev = ACPI_COMPANION(&client->dev);
+ if (!adev)
+ return -ENODEV;
+
+ ret = acpi_dev_get_resources(adev, &resources,
+ acpi_i2c_check_resource, &i2c_addr);
+ if (ret < 0)
+ return ret;
+
+ acpi_dev_free_resource_list(&resources);
+ *primary_addr = i2c_addr & 0x0000ffff;
+ *secondary_addr = (i2c_addr & 0xffff0000) >> 16;
+
+ return 0;
+}
+
+int inv_mpu_acpi_create_mux_client(struct inv_mpu6050_state *st)
+{
+
+ st->mux_client = NULL;
+ if (ACPI_HANDLE(&st->client->dev)) {
+ struct i2c_board_info info;
+ struct acpi_device *adev;
+ int ret = -1;
+
+ adev = ACPI_COMPANION(&st->client->dev);
+ memset(&info, 0, sizeof(info));
+
+ dmi_check_system(inv_mpu_dev_list);
+ switch (matched_product_name) {
+ case INV_MPU_ASUS_T100TA:
+ ret = asus_acpi_get_sensor_info(adev, st->client,
+ &info);
+ break;
+ /* Add more matched product processing here */
+ default:
+ break;
+ }
+
+ if (ret < 0) {
+ /* No matching DMI, so create device on INV6XX type */
+ unsigned short primary, secondary;
+
+ ret = inv_mpu_process_acpi_config(st->client, &primary,
+ &secondary);
+ if (!ret && secondary) {
+ char *name;
+
+ info.addr = secondary;
+ strlcpy(info.type, dev_name(&adev->dev),
+ sizeof(info.type));
+ name = strchr(info.type, ':');
+ if (name)
+ *name = '\0';
+ strlcat(info.type, "-client",
+ sizeof(info.type));
+ } else
+ return 0; /* no secondary addr, which is OK */
+ }
+ st->mux_client = i2c_new_device(st->mux_adapter, &info);
+ if (!st->mux_client)
+ return -ENODEV;
+
+ }
+
+ return 0;
+}
+
+void inv_mpu_acpi_delete_mux_client(struct inv_mpu6050_state *st)
+{
+ if (st->mux_client)
+ i2c_unregister_device(st->mux_client);
+}
+#else
+
+#include "inv_mpu_iio.h"
+
+int inv_mpu_acpi_create_mux_client(struct inv_mpu6050_state *st)
+{
+ return 0;
+}
+
+void inv_mpu_acpi_delete_mux_client(struct inv_mpu6050_state *st)
+{
+}
+#endif
diff --git a/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
new file mode 100644
index 000000000..17d4bb15b
--- /dev/null
+++ b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -0,0 +1,917 @@
+/*
+* Copyright (C) 2012 Invensense, Inc.
+*
+* This software is licensed under the terms of the GNU General Public
+* License version 2, as published by the Free Software Foundation, and
+* may be copied, distributed, and modified under those terms.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*/
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/sysfs.h>
+#include <linux/jiffies.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/kfifo.h>
+#include <linux/spinlock.h>
+#include <linux/iio/iio.h>
+#include <linux/i2c-mux.h>
+#include <linux/acpi.h>
+#include "inv_mpu_iio.h"
+
+/*
+ * this is the gyro scale translated from dynamic range plus/minus
+ * {250, 500, 1000, 2000} to rad/s
+ */
+static const int gyro_scale_6050[] = {133090, 266181, 532362, 1064724};
+
+/*
+ * this is the accel scale translated from dynamic range plus/minus
+ * {2, 4, 8, 16} to m/s^2
+ */
+static const int accel_scale[] = {598, 1196, 2392, 4785};
+
+static const struct inv_mpu6050_reg_map reg_set_6050 = {
+ .sample_rate_div = INV_MPU6050_REG_SAMPLE_RATE_DIV,
+ .lpf = INV_MPU6050_REG_CONFIG,
+ .user_ctrl = INV_MPU6050_REG_USER_CTRL,
+ .fifo_en = INV_MPU6050_REG_FIFO_EN,
+ .gyro_config = INV_MPU6050_REG_GYRO_CONFIG,
+ .accl_config = INV_MPU6050_REG_ACCEL_CONFIG,
+ .fifo_count_h = INV_MPU6050_REG_FIFO_COUNT_H,
+ .fifo_r_w = INV_MPU6050_REG_FIFO_R_W,
+ .raw_gyro = INV_MPU6050_REG_RAW_GYRO,
+ .raw_accl = INV_MPU6050_REG_RAW_ACCEL,
+ .temperature = INV_MPU6050_REG_TEMPERATURE,
+ .int_enable = INV_MPU6050_REG_INT_ENABLE,
+ .pwr_mgmt_1 = INV_MPU6050_REG_PWR_MGMT_1,
+ .pwr_mgmt_2 = INV_MPU6050_REG_PWR_MGMT_2,
+ .int_pin_cfg = INV_MPU6050_REG_INT_PIN_CFG,
+};
+
+static const struct inv_mpu6050_chip_config chip_config_6050 = {
+ .fsr = INV_MPU6050_FSR_2000DPS,
+ .lpf = INV_MPU6050_FILTER_20HZ,
+ .fifo_rate = INV_MPU6050_INIT_FIFO_RATE,
+ .gyro_fifo_enable = false,
+ .accl_fifo_enable = false,
+ .accl_fs = INV_MPU6050_FS_02G,
+};
+
+static const struct inv_mpu6050_hw hw_info[INV_NUM_PARTS] = {
+ {
+ .num_reg = 117,
+ .name = "MPU6050",
+ .reg = &reg_set_6050,
+ .config = &chip_config_6050,
+ },
+};
+
+int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 d)
+{
+ return i2c_smbus_write_i2c_block_data(st->client, reg, 1, &d);
+}
+
+/*
+ * The i2c read/write needs to happen in unlocked mode. As the parent
+ * adapter is common. If we use locked versions, it will fail as
+ * the mux adapter will lock the parent i2c adapter, while calling
+ * select/deselect functions.
+ */
+static int inv_mpu6050_write_reg_unlocked(struct inv_mpu6050_state *st,
+ u8 reg, u8 d)
+{
+ int ret;
+ u8 buf[2];
+ struct i2c_msg msg[1] = {
+ {
+ .addr = st->client->addr,
+ .flags = 0,
+ .len = sizeof(buf),
+ .buf = buf,
+ }
+ };
+
+ buf[0] = reg;
+ buf[1] = d;
+ ret = __i2c_transfer(st->client->adapter, msg, 1);
+ if (ret != 1)
+ return ret;
+
+ return 0;
+}
+
+static int inv_mpu6050_select_bypass(struct i2c_adapter *adap, void *mux_priv,
+ u32 chan_id)
+{
+ struct iio_dev *indio_dev = mux_priv;
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+ int ret = 0;
+
+ /* Use the same mutex which was used everywhere to protect power-op */
+ mutex_lock(&indio_dev->mlock);
+ if (!st->powerup_count) {
+ ret = inv_mpu6050_write_reg_unlocked(st, st->reg->pwr_mgmt_1,
+ 0);
+ if (ret)
+ goto write_error;
+
+ msleep(INV_MPU6050_REG_UP_TIME);
+ }
+ if (!ret) {
+ st->powerup_count++;
+ ret = inv_mpu6050_write_reg_unlocked(st, st->reg->int_pin_cfg,
+ st->client->irq |
+ INV_MPU6050_BIT_BYPASS_EN);
+ }
+write_error:
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static int inv_mpu6050_deselect_bypass(struct i2c_adapter *adap,
+ void *mux_priv, u32 chan_id)
+{
+ struct iio_dev *indio_dev = mux_priv;
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ mutex_lock(&indio_dev->mlock);
+ /* It doesn't really mattter, if any of the calls fails */
+ inv_mpu6050_write_reg_unlocked(st, st->reg->int_pin_cfg,
+ st->client->irq);
+ st->powerup_count--;
+ if (!st->powerup_count)
+ inv_mpu6050_write_reg_unlocked(st, st->reg->pwr_mgmt_1,
+ INV_MPU6050_BIT_SLEEP);
+ mutex_unlock(&indio_dev->mlock);
+
+ return 0;
+}
+
+int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
+{
+ u8 d, mgmt_1;
+ int result;
+
+ /* switch clock needs to be careful. Only when gyro is on, can
+ clock source be switched to gyro. Otherwise, it must be set to
+ internal clock */
+ if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) {
+ result = i2c_smbus_read_i2c_block_data(st->client,
+ st->reg->pwr_mgmt_1, 1, &mgmt_1);
+ if (result != 1)
+ return result;
+
+ mgmt_1 &= ~INV_MPU6050_BIT_CLK_MASK;
+ }
+
+ if ((INV_MPU6050_BIT_PWR_GYRO_STBY == mask) && (!en)) {
+ /* turning off gyro requires switch to internal clock first.
+ Then turn off gyro engine */
+ mgmt_1 |= INV_CLK_INTERNAL;
+ result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, mgmt_1);
+ if (result)
+ return result;
+ }
+
+ result = i2c_smbus_read_i2c_block_data(st->client,
+ st->reg->pwr_mgmt_2, 1, &d);
+ if (result != 1)
+ return result;
+ if (en)
+ d &= ~mask;
+ else
+ d |= mask;
+ result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_2, d);
+ if (result)
+ return result;
+
+ if (en) {
+ /* Wait for output stabilize */
+ msleep(INV_MPU6050_TEMP_UP_TIME);
+ if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) {
+ /* switch internal clock to PLL */
+ mgmt_1 |= INV_CLK_PLL;
+ result = inv_mpu6050_write_reg(st,
+ st->reg->pwr_mgmt_1, mgmt_1);
+ if (result)
+ return result;
+ }
+ }
+
+ return 0;
+}
+
+int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on)
+{
+ int result = 0;
+
+ if (power_on) {
+ /* Already under indio-dev->mlock mutex */
+ if (!st->powerup_count)
+ result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
+ 0);
+ if (!result)
+ st->powerup_count++;
+ } else {
+ st->powerup_count--;
+ if (!st->powerup_count)
+ result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
+ INV_MPU6050_BIT_SLEEP);
+ }
+
+ if (result)
+ return result;
+
+ if (power_on)
+ msleep(INV_MPU6050_REG_UP_TIME);
+
+ return 0;
+}
+
+/**
+ * inv_mpu6050_init_config() - Initialize hardware, disable FIFO.
+ *
+ * Initial configuration:
+ * FSR: ± 2000DPS
+ * DLPF: 20Hz
+ * FIFO rate: 50Hz
+ * Clock source: Gyro PLL
+ */
+static int inv_mpu6050_init_config(struct iio_dev *indio_dev)
+{
+ int result;
+ u8 d;
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ result = inv_mpu6050_set_power_itg(st, true);
+ if (result)
+ return result;
+ d = (INV_MPU6050_FSR_2000DPS << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
+ result = inv_mpu6050_write_reg(st, st->reg->gyro_config, d);
+ if (result)
+ return result;
+
+ d = INV_MPU6050_FILTER_20HZ;
+ result = inv_mpu6050_write_reg(st, st->reg->lpf, d);
+ if (result)
+ return result;
+
+ d = INV_MPU6050_ONE_K_HZ / INV_MPU6050_INIT_FIFO_RATE - 1;
+ result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d);
+ if (result)
+ return result;
+
+ d = (INV_MPU6050_FS_02G << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
+ result = inv_mpu6050_write_reg(st, st->reg->accl_config, d);
+ if (result)
+ return result;
+
+ memcpy(&st->chip_config, hw_info[st->chip_type].config,
+ sizeof(struct inv_mpu6050_chip_config));
+ result = inv_mpu6050_set_power_itg(st, false);
+
+ return result;
+}
+
+static int inv_mpu6050_sensor_show(struct inv_mpu6050_state *st, int reg,
+ int axis, int *val)
+{
+ int ind, result;
+ __be16 d;
+
+ ind = (axis - IIO_MOD_X) * 2;
+ result = i2c_smbus_read_i2c_block_data(st->client, reg + ind, 2,
+ (u8 *)&d);
+ if (result != 2)
+ return -EINVAL;
+ *val = (short)be16_to_cpup(&d);
+
+ return IIO_VAL_INT;
+}
+
+static int inv_mpu6050_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask) {
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ {
+ int ret, result;
+
+ ret = IIO_VAL_INT;
+ result = 0;
+ mutex_lock(&indio_dev->mlock);
+ if (!st->chip_config.enable) {
+ result = inv_mpu6050_set_power_itg(st, true);
+ if (result)
+ goto error_read_raw;
+ }
+ /* when enable is on, power is already on */
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ if (!st->chip_config.gyro_fifo_enable ||
+ !st->chip_config.enable) {
+ result = inv_mpu6050_switch_engine(st, true,
+ INV_MPU6050_BIT_PWR_GYRO_STBY);
+ if (result)
+ goto error_read_raw;
+ }
+ ret = inv_mpu6050_sensor_show(st, st->reg->raw_gyro,
+ chan->channel2, val);
+ if (!st->chip_config.gyro_fifo_enable ||
+ !st->chip_config.enable) {
+ result = inv_mpu6050_switch_engine(st, false,
+ INV_MPU6050_BIT_PWR_GYRO_STBY);
+ if (result)
+ goto error_read_raw;
+ }
+ break;
+ case IIO_ACCEL:
+ if (!st->chip_config.accl_fifo_enable ||
+ !st->chip_config.enable) {
+ result = inv_mpu6050_switch_engine(st, true,
+ INV_MPU6050_BIT_PWR_ACCL_STBY);
+ if (result)
+ goto error_read_raw;
+ }
+ ret = inv_mpu6050_sensor_show(st, st->reg->raw_accl,
+ chan->channel2, val);
+ if (!st->chip_config.accl_fifo_enable ||
+ !st->chip_config.enable) {
+ result = inv_mpu6050_switch_engine(st, false,
+ INV_MPU6050_BIT_PWR_ACCL_STBY);
+ if (result)
+ goto error_read_raw;
+ }
+ break;
+ case IIO_TEMP:
+ /* wait for stablization */
+ msleep(INV_MPU6050_SENSOR_UP_TIME);
+ inv_mpu6050_sensor_show(st, st->reg->temperature,
+ IIO_MOD_X, val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+error_read_raw:
+ if (!st->chip_config.enable)
+ result |= inv_mpu6050_set_power_itg(st, false);
+ mutex_unlock(&indio_dev->mlock);
+ if (result)
+ return result;
+
+ return ret;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ *val = 0;
+ *val2 = gyro_scale_6050[st->chip_config.fsr];
+
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_ACCEL:
+ *val = 0;
+ *val2 = accel_scale[st->chip_config.accl_fs];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_TEMP:
+ *val = 0;
+ *val2 = INV_MPU6050_TEMP_SCALE;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ switch (chan->type) {
+ case IIO_TEMP:
+ *val = INV_MPU6050_TEMP_OFFSET;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int inv_mpu6050_write_gyro_scale(struct inv_mpu6050_state *st, int val)
+{
+ int result, i;
+ u8 d;
+
+ for (i = 0; i < ARRAY_SIZE(gyro_scale_6050); ++i) {
+ if (gyro_scale_6050[i] == val) {
+ d = (i << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
+ result = inv_mpu6050_write_reg(st,
+ st->reg->gyro_config, d);
+ if (result)
+ return result;
+
+ st->chip_config.fsr = i;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int inv_mpu6050_write_accel_scale(struct inv_mpu6050_state *st, int val)
+{
+ int result, i;
+ u8 d;
+
+ for (i = 0; i < ARRAY_SIZE(accel_scale); ++i) {
+ if (accel_scale[i] == val) {
+ d = (i << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
+ result = inv_mpu6050_write_reg(st,
+ st->reg->accl_config, d);
+ if (result)
+ return result;
+
+ st->chip_config.accl_fs = i;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask) {
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+ int result;
+
+ mutex_lock(&indio_dev->mlock);
+ /* we should only update scale when the chip is disabled, i.e.,
+ not running */
+ if (st->chip_config.enable) {
+ result = -EBUSY;
+ goto error_write_raw;
+ }
+ result = inv_mpu6050_set_power_itg(st, true);
+ if (result)
+ goto error_write_raw;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ result = inv_mpu6050_write_gyro_scale(st, val2);
+ break;
+ case IIO_ACCEL:
+ result = inv_mpu6050_write_accel_scale(st, val2);
+ break;
+ default:
+ result = -EINVAL;
+ break;
+ }
+ break;
+ default:
+ result = -EINVAL;
+ break;
+ }
+
+error_write_raw:
+ result |= inv_mpu6050_set_power_itg(st, false);
+ mutex_unlock(&indio_dev->mlock);
+
+ return result;
+}
+
+/**
+ * inv_mpu6050_set_lpf() - set low pass filer based on fifo rate.
+ *
+ * Based on the Nyquist principle, the sampling rate must
+ * exceed twice of the bandwidth of the signal, or there
+ * would be alising. This function basically search for the
+ * correct low pass parameters based on the fifo rate, e.g,
+ * sampling frequency.
+ */
+static int inv_mpu6050_set_lpf(struct inv_mpu6050_state *st, int rate)
+{
+ const int hz[] = {188, 98, 42, 20, 10, 5};
+ const int d[] = {INV_MPU6050_FILTER_188HZ, INV_MPU6050_FILTER_98HZ,
+ INV_MPU6050_FILTER_42HZ, INV_MPU6050_FILTER_20HZ,
+ INV_MPU6050_FILTER_10HZ, INV_MPU6050_FILTER_5HZ};
+ int i, h, result;
+ u8 data;
+
+ h = (rate >> 1);
+ i = 0;
+ while ((h < hz[i]) && (i < ARRAY_SIZE(d) - 1))
+ i++;
+ data = d[i];
+ result = inv_mpu6050_write_reg(st, st->reg->lpf, data);
+ if (result)
+ return result;
+ st->chip_config.lpf = data;
+
+ return 0;
+}
+
+/**
+ * inv_mpu6050_fifo_rate_store() - Set fifo rate.
+ */
+static ssize_t inv_mpu6050_fifo_rate_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ s32 fifo_rate;
+ u8 d;
+ int result;
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ if (kstrtoint(buf, 10, &fifo_rate))
+ return -EINVAL;
+ if (fifo_rate < INV_MPU6050_MIN_FIFO_RATE ||
+ fifo_rate > INV_MPU6050_MAX_FIFO_RATE)
+ return -EINVAL;
+ if (fifo_rate == st->chip_config.fifo_rate)
+ return count;
+
+ mutex_lock(&indio_dev->mlock);
+ if (st->chip_config.enable) {
+ result = -EBUSY;
+ goto fifo_rate_fail;
+ }
+ result = inv_mpu6050_set_power_itg(st, true);
+ if (result)
+ goto fifo_rate_fail;
+
+ d = INV_MPU6050_ONE_K_HZ / fifo_rate - 1;
+ result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d);
+ if (result)
+ goto fifo_rate_fail;
+ st->chip_config.fifo_rate = fifo_rate;
+
+ result = inv_mpu6050_set_lpf(st, fifo_rate);
+ if (result)
+ goto fifo_rate_fail;
+
+fifo_rate_fail:
+ result |= inv_mpu6050_set_power_itg(st, false);
+ mutex_unlock(&indio_dev->mlock);
+ if (result)
+ return result;
+
+ return count;
+}
+
+/**
+ * inv_fifo_rate_show() - Get the current sampling rate.
+ */
+static ssize_t inv_fifo_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev));
+
+ return sprintf(buf, "%d\n", st->chip_config.fifo_rate);
+}
+
+/**
+ * inv_attr_show() - calling this function will show current
+ * parameters.
+ */
+static ssize_t inv_attr_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev));
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ s8 *m;
+
+ switch (this_attr->address) {
+ /* In MPU6050, the two matrix are the same because gyro and accel
+ are integrated in one chip */
+ case ATTR_GYRO_MATRIX:
+ case ATTR_ACCL_MATRIX:
+ m = st->plat_data.orientation;
+
+ return sprintf(buf, "%d, %d, %d; %d, %d, %d; %d, %d, %d\n",
+ m[0], m[1], m[2], m[3], m[4], m[5], m[6], m[7], m[8]);
+ default:
+ return -EINVAL;
+ }
+}
+
+/**
+ * inv_mpu6050_validate_trigger() - validate_trigger callback for invensense
+ * MPU6050 device.
+ * @indio_dev: The IIO device
+ * @trig: The new trigger
+ *
+ * Returns: 0 if the 'trig' matches the trigger registered by the MPU6050
+ * device, -EINVAL otherwise.
+ */
+static int inv_mpu6050_validate_trigger(struct iio_dev *indio_dev,
+ struct iio_trigger *trig)
+{
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ if (st->trig != trig)
+ return -EINVAL;
+
+ return 0;
+}
+
+#define INV_MPU6050_CHAN(_type, _channel2, _index) \
+ { \
+ .type = _type, \
+ .modified = 1, \
+ .channel2 = _channel2, \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .scan_index = _index, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .shift = 0 , \
+ .endianness = IIO_BE, \
+ }, \
+ }
+
+static const struct iio_chan_spec inv_mpu_channels[] = {
+ IIO_CHAN_SOFT_TIMESTAMP(INV_MPU6050_SCAN_TIMESTAMP),
+ /*
+ * Note that temperature should only be via polled reading only,
+ * not the final scan elements output.
+ */
+ {
+ .type = IIO_TEMP,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW)
+ | BIT(IIO_CHAN_INFO_OFFSET)
+ | BIT(IIO_CHAN_INFO_SCALE),
+ .scan_index = -1,
+ },
+ INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_MPU6050_SCAN_GYRO_X),
+ INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_MPU6050_SCAN_GYRO_Y),
+ INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_MPU6050_SCAN_GYRO_Z),
+
+ INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_X, INV_MPU6050_SCAN_ACCL_X),
+ INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Y, INV_MPU6050_SCAN_ACCL_Y),
+ INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Z, INV_MPU6050_SCAN_ACCL_Z),
+};
+
+/* constant IIO attribute */
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("10 20 50 100 200 500");
+static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR, inv_fifo_rate_show,
+ inv_mpu6050_fifo_rate_store);
+static IIO_DEVICE_ATTR(in_gyro_matrix, S_IRUGO, inv_attr_show, NULL,
+ ATTR_GYRO_MATRIX);
+static IIO_DEVICE_ATTR(in_accel_matrix, S_IRUGO, inv_attr_show, NULL,
+ ATTR_ACCL_MATRIX);
+
+static struct attribute *inv_attributes[] = {
+ &iio_dev_attr_in_gyro_matrix.dev_attr.attr,
+ &iio_dev_attr_in_accel_matrix.dev_attr.attr,
+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group inv_attribute_group = {
+ .attrs = inv_attributes
+};
+
+static const struct iio_info mpu_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &inv_mpu6050_read_raw,
+ .write_raw = &inv_mpu6050_write_raw,
+ .attrs = &inv_attribute_group,
+ .validate_trigger = inv_mpu6050_validate_trigger,
+};
+
+/**
+ * inv_check_and_setup_chip() - check and setup chip.
+ */
+static int inv_check_and_setup_chip(struct inv_mpu6050_state *st,
+ const struct i2c_device_id *id)
+{
+ int result;
+
+ st->chip_type = INV_MPU6050;
+ st->hw = &hw_info[st->chip_type];
+ st->reg = hw_info[st->chip_type].reg;
+
+ /* reset to make sure previous state are not there */
+ result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
+ INV_MPU6050_BIT_H_RESET);
+ if (result)
+ return result;
+ msleep(INV_MPU6050_POWER_UP_TIME);
+ /* toggle power state. After reset, the sleep bit could be on
+ or off depending on the OTP settings. Toggling power would
+ make it in a definite state as well as making the hardware
+ state align with the software state */
+ result = inv_mpu6050_set_power_itg(st, false);
+ if (result)
+ return result;
+ result = inv_mpu6050_set_power_itg(st, true);
+ if (result)
+ return result;
+
+ result = inv_mpu6050_switch_engine(st, false,
+ INV_MPU6050_BIT_PWR_ACCL_STBY);
+ if (result)
+ return result;
+ result = inv_mpu6050_switch_engine(st, false,
+ INV_MPU6050_BIT_PWR_GYRO_STBY);
+ if (result)
+ return result;
+
+ return 0;
+}
+
+/**
+ * inv_mpu_probe() - probe function.
+ * @client: i2c client.
+ * @id: i2c device id.
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ */
+static int inv_mpu_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct inv_mpu6050_state *st;
+ struct iio_dev *indio_dev;
+ struct inv_mpu6050_platform_data *pdata;
+ int result;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_I2C_BLOCK))
+ return -ENOSYS;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ st->client = client;
+ st->powerup_count = 0;
+ pdata = dev_get_platdata(&client->dev);
+ if (pdata)
+ st->plat_data = *pdata;
+ /* power is turned on inside check chip type*/
+ result = inv_check_and_setup_chip(st, id);
+ if (result)
+ return result;
+
+ result = inv_mpu6050_init_config(indio_dev);
+ if (result) {
+ dev_err(&client->dev,
+ "Could not initialize device.\n");
+ return result;
+ }
+
+ i2c_set_clientdata(client, indio_dev);
+ indio_dev->dev.parent = &client->dev;
+ /* id will be NULL when enumerated via ACPI */
+ if (id)
+ indio_dev->name = (char *)id->name;
+ else
+ indio_dev->name = (char *)dev_name(&client->dev);
+ indio_dev->channels = inv_mpu_channels;
+ indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels);
+
+ indio_dev->info = &mpu_info;
+ indio_dev->modes = INDIO_BUFFER_TRIGGERED;
+
+ result = iio_triggered_buffer_setup(indio_dev,
+ inv_mpu6050_irq_handler,
+ inv_mpu6050_read_fifo,
+ NULL);
+ if (result) {
+ dev_err(&st->client->dev, "configure buffer fail %d\n",
+ result);
+ return result;
+ }
+ result = inv_mpu6050_probe_trigger(indio_dev);
+ if (result) {
+ dev_err(&st->client->dev, "trigger probe fail %d\n", result);
+ goto out_unreg_ring;
+ }
+
+ INIT_KFIFO(st->timestamps);
+ spin_lock_init(&st->time_stamp_lock);
+ result = iio_device_register(indio_dev);
+ if (result) {
+ dev_err(&st->client->dev, "IIO register fail %d\n", result);
+ goto out_remove_trigger;
+ }
+
+ st->mux_adapter = i2c_add_mux_adapter(client->adapter,
+ &client->dev,
+ indio_dev,
+ 0, 0, 0,
+ inv_mpu6050_select_bypass,
+ inv_mpu6050_deselect_bypass);
+ if (!st->mux_adapter) {
+ result = -ENODEV;
+ goto out_unreg_device;
+ }
+
+ result = inv_mpu_acpi_create_mux_client(st);
+ if (result)
+ goto out_del_mux;
+
+ return 0;
+
+out_del_mux:
+ i2c_del_mux_adapter(st->mux_adapter);
+out_unreg_device:
+ iio_device_unregister(indio_dev);
+out_remove_trigger:
+ inv_mpu6050_remove_trigger(st);
+out_unreg_ring:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return result;
+}
+
+static int inv_mpu_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ inv_mpu_acpi_delete_mux_client(st);
+ i2c_del_mux_adapter(st->mux_adapter);
+ iio_device_unregister(indio_dev);
+ inv_mpu6050_remove_trigger(st);
+ iio_triggered_buffer_cleanup(indio_dev);
+
+ return 0;
+}
+#ifdef CONFIG_PM_SLEEP
+
+static int inv_mpu_resume(struct device *dev)
+{
+ return inv_mpu6050_set_power_itg(
+ iio_priv(i2c_get_clientdata(to_i2c_client(dev))), true);
+}
+
+static int inv_mpu_suspend(struct device *dev)
+{
+ return inv_mpu6050_set_power_itg(
+ iio_priv(i2c_get_clientdata(to_i2c_client(dev))), false);
+}
+static SIMPLE_DEV_PM_OPS(inv_mpu_pmops, inv_mpu_suspend, inv_mpu_resume);
+
+#define INV_MPU6050_PMOPS (&inv_mpu_pmops)
+#else
+#define INV_MPU6050_PMOPS NULL
+#endif /* CONFIG_PM_SLEEP */
+
+/*
+ * device id table is used to identify what device can be
+ * supported by this driver
+ */
+static const struct i2c_device_id inv_mpu_id[] = {
+ {"mpu6050", INV_MPU6050},
+ {"mpu6500", INV_MPU6500},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, inv_mpu_id);
+
+static const struct acpi_device_id inv_acpi_match[] = {
+ {"INVN6500", 0},
+ { },
+};
+
+MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
+
+static struct i2c_driver inv_mpu_driver = {
+ .probe = inv_mpu_probe,
+ .remove = inv_mpu_remove,
+ .id_table = inv_mpu_id,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "inv-mpu6050",
+ .pm = INV_MPU6050_PMOPS,
+ .acpi_match_table = ACPI_PTR(inv_acpi_match),
+ },
+};
+
+module_i2c_driver(inv_mpu_driver);
+
+MODULE_AUTHOR("Invensense Corporation");
+MODULE_DESCRIPTION("Invensense device MPU6050 driver");
+MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
new file mode 100644
index 000000000..db0a4a275
--- /dev/null
+++ b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -0,0 +1,256 @@
+/*
+* Copyright (C) 2012 Invensense, Inc.
+*
+* This software is licensed under the terms of the GNU General Public
+* License version 2, as published by the Free Software Foundation, and
+* may be copied, distributed, and modified under those terms.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*/
+#include <linux/i2c.h>
+#include <linux/kfifo.h>
+#include <linux/spinlock.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/platform_data/invensense_mpu6050.h>
+
+/**
+ * struct inv_mpu6050_reg_map - Notable registers.
+ * @sample_rate_div: Divider applied to gyro output rate.
+ * @lpf: Configures internal low pass filter.
+ * @user_ctrl: Enables/resets the FIFO.
+ * @fifo_en: Determines which data will appear in FIFO.
+ * @gyro_config: gyro config register.
+ * @accl_config: accel config register
+ * @fifo_count_h: Upper byte of FIFO count.
+ * @fifo_r_w: FIFO register.
+ * @raw_gyro: Address of first gyro register.
+ * @raw_accl: Address of first accel register.
+ * @temperature: temperature register
+ * @int_enable: Interrupt enable register.
+ * @pwr_mgmt_1: Controls chip's power state and clock source.
+ * @pwr_mgmt_2: Controls power state of individual sensors.
+ */
+struct inv_mpu6050_reg_map {
+ u8 sample_rate_div;
+ u8 lpf;
+ u8 user_ctrl;
+ u8 fifo_en;
+ u8 gyro_config;
+ u8 accl_config;
+ u8 fifo_count_h;
+ u8 fifo_r_w;
+ u8 raw_gyro;
+ u8 raw_accl;
+ u8 temperature;
+ u8 int_enable;
+ u8 pwr_mgmt_1;
+ u8 pwr_mgmt_2;
+ u8 int_pin_cfg;
+};
+
+/*device enum */
+enum inv_devices {
+ INV_MPU6050,
+ INV_MPU6500,
+ INV_NUM_PARTS
+};
+
+/**
+ * struct inv_mpu6050_chip_config - Cached chip configuration data.
+ * @fsr: Full scale range.
+ * @lpf: Digital low pass filter frequency.
+ * @accl_fs: accel full scale range.
+ * @enable: master enable state.
+ * @accl_fifo_enable: enable accel data output
+ * @gyro_fifo_enable: enable gyro data output
+ * @fifo_rate: FIFO update rate.
+ */
+struct inv_mpu6050_chip_config {
+ unsigned int fsr:2;
+ unsigned int lpf:3;
+ unsigned int accl_fs:2;
+ unsigned int enable:1;
+ unsigned int accl_fifo_enable:1;
+ unsigned int gyro_fifo_enable:1;
+ u16 fifo_rate;
+};
+
+/**
+ * struct inv_mpu6050_hw - Other important hardware information.
+ * @num_reg: Number of registers on device.
+ * @name: name of the chip.
+ * @reg: register map of the chip.
+ * @config: configuration of the chip.
+ */
+struct inv_mpu6050_hw {
+ u8 num_reg;
+ u8 *name;
+ const struct inv_mpu6050_reg_map *reg;
+ const struct inv_mpu6050_chip_config *config;
+};
+
+/*
+ * struct inv_mpu6050_state - Driver state variables.
+ * @TIMESTAMP_FIFO_SIZE: fifo size for timestamp.
+ * @trig: IIO trigger.
+ * @chip_config: Cached attribute information.
+ * @reg: Map of important registers.
+ * @hw: Other hardware-specific information.
+ * @chip_type: chip type.
+ * @time_stamp_lock: spin lock to time stamp.
+ * @client: i2c client handle.
+ * @plat_data: platform data.
+ * @timestamps: kfifo queue to store time stamp.
+ */
+struct inv_mpu6050_state {
+#define TIMESTAMP_FIFO_SIZE 16
+ struct iio_trigger *trig;
+ struct inv_mpu6050_chip_config chip_config;
+ const struct inv_mpu6050_reg_map *reg;
+ const struct inv_mpu6050_hw *hw;
+ enum inv_devices chip_type;
+ spinlock_t time_stamp_lock;
+ struct i2c_client *client;
+ struct i2c_adapter *mux_adapter;
+ struct i2c_client *mux_client;
+ unsigned int powerup_count;
+ struct inv_mpu6050_platform_data plat_data;
+ DECLARE_KFIFO(timestamps, long long, TIMESTAMP_FIFO_SIZE);
+};
+
+/*register and associated bit definition*/
+#define INV_MPU6050_REG_SAMPLE_RATE_DIV 0x19
+#define INV_MPU6050_REG_CONFIG 0x1A
+#define INV_MPU6050_REG_GYRO_CONFIG 0x1B
+#define INV_MPU6050_REG_ACCEL_CONFIG 0x1C
+
+#define INV_MPU6050_REG_FIFO_EN 0x23
+#define INV_MPU6050_BIT_ACCEL_OUT 0x08
+#define INV_MPU6050_BITS_GYRO_OUT 0x70
+
+#define INV_MPU6050_REG_INT_ENABLE 0x38
+#define INV_MPU6050_BIT_DATA_RDY_EN 0x01
+#define INV_MPU6050_BIT_DMP_INT_EN 0x02
+
+#define INV_MPU6050_REG_RAW_ACCEL 0x3B
+#define INV_MPU6050_REG_TEMPERATURE 0x41
+#define INV_MPU6050_REG_RAW_GYRO 0x43
+
+#define INV_MPU6050_REG_USER_CTRL 0x6A
+#define INV_MPU6050_BIT_FIFO_RST 0x04
+#define INV_MPU6050_BIT_DMP_RST 0x08
+#define INV_MPU6050_BIT_I2C_MST_EN 0x20
+#define INV_MPU6050_BIT_FIFO_EN 0x40
+#define INV_MPU6050_BIT_DMP_EN 0x80
+
+#define INV_MPU6050_REG_PWR_MGMT_1 0x6B
+#define INV_MPU6050_BIT_H_RESET 0x80
+#define INV_MPU6050_BIT_SLEEP 0x40
+#define INV_MPU6050_BIT_CLK_MASK 0x7
+
+#define INV_MPU6050_REG_PWR_MGMT_2 0x6C
+#define INV_MPU6050_BIT_PWR_ACCL_STBY 0x38
+#define INV_MPU6050_BIT_PWR_GYRO_STBY 0x07
+
+#define INV_MPU6050_REG_FIFO_COUNT_H 0x72
+#define INV_MPU6050_REG_FIFO_R_W 0x74
+
+#define INV_MPU6050_BYTES_PER_3AXIS_SENSOR 6
+#define INV_MPU6050_FIFO_COUNT_BYTE 2
+#define INV_MPU6050_FIFO_THRESHOLD 500
+#define INV_MPU6050_POWER_UP_TIME 100
+#define INV_MPU6050_TEMP_UP_TIME 100
+#define INV_MPU6050_SENSOR_UP_TIME 30
+#define INV_MPU6050_REG_UP_TIME 5
+
+#define INV_MPU6050_TEMP_OFFSET 12421
+#define INV_MPU6050_TEMP_SCALE 2941
+#define INV_MPU6050_MAX_GYRO_FS_PARAM 3
+#define INV_MPU6050_MAX_ACCL_FS_PARAM 3
+#define INV_MPU6050_THREE_AXIS 3
+#define INV_MPU6050_GYRO_CONFIG_FSR_SHIFT 3
+#define INV_MPU6050_ACCL_CONFIG_FSR_SHIFT 3
+
+/* 6 + 6 round up and plus 8 */
+#define INV_MPU6050_OUTPUT_DATA_SIZE 24
+
+#define INV_MPU6050_REG_INT_PIN_CFG 0x37
+#define INV_MPU6050_BIT_BYPASS_EN 0x2
+
+/* init parameters */
+#define INV_MPU6050_INIT_FIFO_RATE 50
+#define INV_MPU6050_TIME_STAMP_TOR 5
+#define INV_MPU6050_MAX_FIFO_RATE 1000
+#define INV_MPU6050_MIN_FIFO_RATE 4
+#define INV_MPU6050_ONE_K_HZ 1000
+
+/* scan element definition */
+enum inv_mpu6050_scan {
+ INV_MPU6050_SCAN_ACCL_X,
+ INV_MPU6050_SCAN_ACCL_Y,
+ INV_MPU6050_SCAN_ACCL_Z,
+ INV_MPU6050_SCAN_GYRO_X,
+ INV_MPU6050_SCAN_GYRO_Y,
+ INV_MPU6050_SCAN_GYRO_Z,
+ INV_MPU6050_SCAN_TIMESTAMP,
+};
+
+enum inv_mpu6050_filter_e {
+ INV_MPU6050_FILTER_256HZ_NOLPF2 = 0,
+ INV_MPU6050_FILTER_188HZ,
+ INV_MPU6050_FILTER_98HZ,
+ INV_MPU6050_FILTER_42HZ,
+ INV_MPU6050_FILTER_20HZ,
+ INV_MPU6050_FILTER_10HZ,
+ INV_MPU6050_FILTER_5HZ,
+ INV_MPU6050_FILTER_2100HZ_NOLPF,
+ NUM_MPU6050_FILTER
+};
+
+/* IIO attribute address */
+enum INV_MPU6050_IIO_ATTR_ADDR {
+ ATTR_GYRO_MATRIX,
+ ATTR_ACCL_MATRIX,
+};
+
+enum inv_mpu6050_accl_fs_e {
+ INV_MPU6050_FS_02G = 0,
+ INV_MPU6050_FS_04G,
+ INV_MPU6050_FS_08G,
+ INV_MPU6050_FS_16G,
+ NUM_ACCL_FSR
+};
+
+enum inv_mpu6050_fsr_e {
+ INV_MPU6050_FSR_250DPS = 0,
+ INV_MPU6050_FSR_500DPS,
+ INV_MPU6050_FSR_1000DPS,
+ INV_MPU6050_FSR_2000DPS,
+ NUM_MPU6050_FSR
+};
+
+enum inv_mpu6050_clock_sel_e {
+ INV_CLK_INTERNAL = 0,
+ INV_CLK_PLL,
+ NUM_CLK
+};
+
+irqreturn_t inv_mpu6050_irq_handler(int irq, void *p);
+irqreturn_t inv_mpu6050_read_fifo(int irq, void *p);
+int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev);
+void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st);
+int inv_reset_fifo(struct iio_dev *indio_dev);
+int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask);
+int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 val);
+int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on);
+int inv_mpu_acpi_create_mux_client(struct inv_mpu6050_state *st);
+void inv_mpu_acpi_delete_mux_client(struct inv_mpu6050_state *st);
diff --git a/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
new file mode 100644
index 000000000..ba27e2775
--- /dev/null
+++ b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
@@ -0,0 +1,195 @@
+/*
+* Copyright (C) 2012 Invensense, Inc.
+*
+* This software is licensed under the terms of the GNU General Public
+* License version 2, as published by the Free Software Foundation, and
+* may be copied, distributed, and modified under those terms.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*/
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/sysfs.h>
+#include <linux/jiffies.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/kfifo.h>
+#include <linux/poll.h>
+#include "inv_mpu_iio.h"
+
+static void inv_clear_kfifo(struct inv_mpu6050_state *st)
+{
+ unsigned long flags;
+
+ /* take the spin lock sem to avoid interrupt kick in */
+ spin_lock_irqsave(&st->time_stamp_lock, flags);
+ kfifo_reset(&st->timestamps);
+ spin_unlock_irqrestore(&st->time_stamp_lock, flags);
+}
+
+int inv_reset_fifo(struct iio_dev *indio_dev)
+{
+ int result;
+ u8 d;
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ /* disable interrupt */
+ result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0);
+ if (result) {
+ dev_err(&st->client->dev, "int_enable failed %d\n", result);
+ return result;
+ }
+ /* disable the sensor output to FIFO */
+ result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0);
+ if (result)
+ goto reset_fifo_fail;
+ /* disable fifo reading */
+ result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0);
+ if (result)
+ goto reset_fifo_fail;
+
+ /* reset FIFO*/
+ result = inv_mpu6050_write_reg(st, st->reg->user_ctrl,
+ INV_MPU6050_BIT_FIFO_RST);
+ if (result)
+ goto reset_fifo_fail;
+
+ /* clear timestamps fifo */
+ inv_clear_kfifo(st);
+
+ /* enable interrupt */
+ if (st->chip_config.accl_fifo_enable ||
+ st->chip_config.gyro_fifo_enable) {
+ result = inv_mpu6050_write_reg(st, st->reg->int_enable,
+ INV_MPU6050_BIT_DATA_RDY_EN);
+ if (result)
+ return result;
+ }
+ /* enable FIFO reading and I2C master interface*/
+ result = inv_mpu6050_write_reg(st, st->reg->user_ctrl,
+ INV_MPU6050_BIT_FIFO_EN);
+ if (result)
+ goto reset_fifo_fail;
+ /* enable sensor output to FIFO */
+ d = 0;
+ if (st->chip_config.gyro_fifo_enable)
+ d |= INV_MPU6050_BITS_GYRO_OUT;
+ if (st->chip_config.accl_fifo_enable)
+ d |= INV_MPU6050_BIT_ACCEL_OUT;
+ result = inv_mpu6050_write_reg(st, st->reg->fifo_en, d);
+ if (result)
+ goto reset_fifo_fail;
+
+ return 0;
+
+reset_fifo_fail:
+ dev_err(&st->client->dev, "reset fifo failed %d\n", result);
+ result = inv_mpu6050_write_reg(st, st->reg->int_enable,
+ INV_MPU6050_BIT_DATA_RDY_EN);
+
+ return result;
+}
+
+/**
+ * inv_mpu6050_irq_handler() - Cache a timestamp at each data ready interrupt.
+ */
+irqreturn_t inv_mpu6050_irq_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+ s64 timestamp;
+
+ timestamp = iio_get_time_ns();
+ kfifo_in_spinlocked(&st->timestamps, &timestamp, 1,
+ &st->time_stamp_lock);
+
+ return IRQ_WAKE_THREAD;
+}
+
+/**
+ * inv_mpu6050_read_fifo() - Transfer data from hardware FIFO to KFIFO.
+ */
+irqreturn_t inv_mpu6050_read_fifo(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+ size_t bytes_per_datum;
+ int result;
+ u8 data[INV_MPU6050_OUTPUT_DATA_SIZE];
+ u16 fifo_count;
+ s64 timestamp;
+
+ mutex_lock(&indio_dev->mlock);
+ if (!(st->chip_config.accl_fifo_enable |
+ st->chip_config.gyro_fifo_enable))
+ goto end_session;
+ bytes_per_datum = 0;
+ if (st->chip_config.accl_fifo_enable)
+ bytes_per_datum += INV_MPU6050_BYTES_PER_3AXIS_SENSOR;
+
+ if (st->chip_config.gyro_fifo_enable)
+ bytes_per_datum += INV_MPU6050_BYTES_PER_3AXIS_SENSOR;
+
+ /*
+ * read fifo_count register to know how many bytes inside FIFO
+ * right now
+ */
+ result = i2c_smbus_read_i2c_block_data(st->client,
+ st->reg->fifo_count_h,
+ INV_MPU6050_FIFO_COUNT_BYTE, data);
+ if (result != INV_MPU6050_FIFO_COUNT_BYTE)
+ goto end_session;
+ fifo_count = be16_to_cpup((__be16 *)(&data[0]));
+ if (fifo_count < bytes_per_datum)
+ goto end_session;
+ /* fifo count can't be odd number, if it is odd, reset fifo*/
+ if (fifo_count & 1)
+ goto flush_fifo;
+ if (fifo_count > INV_MPU6050_FIFO_THRESHOLD)
+ goto flush_fifo;
+ /* Timestamp mismatch. */
+ if (kfifo_len(&st->timestamps) >
+ fifo_count / bytes_per_datum + INV_MPU6050_TIME_STAMP_TOR)
+ goto flush_fifo;
+ while (fifo_count >= bytes_per_datum) {
+ result = i2c_smbus_read_i2c_block_data(st->client,
+ st->reg->fifo_r_w,
+ bytes_per_datum, data);
+ if (result != bytes_per_datum)
+ goto flush_fifo;
+
+ result = kfifo_out(&st->timestamps, &timestamp, 1);
+ /* when there is no timestamp, put timestamp as 0 */
+ if (0 == result)
+ timestamp = 0;
+
+ result = iio_push_to_buffers_with_timestamp(indio_dev, data,
+ timestamp);
+ if (result)
+ goto flush_fifo;
+ fifo_count -= bytes_per_datum;
+ }
+
+end_session:
+ mutex_unlock(&indio_dev->mlock);
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+
+flush_fifo:
+ /* Flush HW and SW FIFOs. */
+ inv_reset_fifo(indio_dev);
+ mutex_unlock(&indio_dev->mlock);
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
diff --git a/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
new file mode 100644
index 000000000..844610c3a
--- /dev/null
+++ b/kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
@@ -0,0 +1,150 @@
+/*
+* Copyright (C) 2012 Invensense, Inc.
+*
+* This software is licensed under the terms of the GNU General Public
+* License version 2, as published by the Free Software Foundation, and
+* may be copied, distributed, and modified under those terms.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*/
+
+#include "inv_mpu_iio.h"
+
+static void inv_scan_query(struct iio_dev *indio_dev)
+{
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ st->chip_config.gyro_fifo_enable =
+ test_bit(INV_MPU6050_SCAN_GYRO_X,
+ indio_dev->active_scan_mask) ||
+ test_bit(INV_MPU6050_SCAN_GYRO_Y,
+ indio_dev->active_scan_mask) ||
+ test_bit(INV_MPU6050_SCAN_GYRO_Z,
+ indio_dev->active_scan_mask);
+
+ st->chip_config.accl_fifo_enable =
+ test_bit(INV_MPU6050_SCAN_ACCL_X,
+ indio_dev->active_scan_mask) ||
+ test_bit(INV_MPU6050_SCAN_ACCL_Y,
+ indio_dev->active_scan_mask) ||
+ test_bit(INV_MPU6050_SCAN_ACCL_Z,
+ indio_dev->active_scan_mask);
+}
+
+/**
+ * inv_mpu6050_set_enable() - enable chip functions.
+ * @indio_dev: Device driver instance.
+ * @enable: enable/disable
+ */
+static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
+{
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+ int result;
+
+ if (enable) {
+ result = inv_mpu6050_set_power_itg(st, true);
+ if (result)
+ return result;
+ inv_scan_query(indio_dev);
+ if (st->chip_config.gyro_fifo_enable) {
+ result = inv_mpu6050_switch_engine(st, true,
+ INV_MPU6050_BIT_PWR_GYRO_STBY);
+ if (result)
+ return result;
+ }
+ if (st->chip_config.accl_fifo_enable) {
+ result = inv_mpu6050_switch_engine(st, true,
+ INV_MPU6050_BIT_PWR_ACCL_STBY);
+ if (result)
+ return result;
+ }
+ result = inv_reset_fifo(indio_dev);
+ if (result)
+ return result;
+ } else {
+ result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0);
+ if (result)
+ return result;
+
+ result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0);
+ if (result)
+ return result;
+
+ result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0);
+ if (result)
+ return result;
+
+ result = inv_mpu6050_switch_engine(st, false,
+ INV_MPU6050_BIT_PWR_GYRO_STBY);
+ if (result)
+ return result;
+
+ result = inv_mpu6050_switch_engine(st, false,
+ INV_MPU6050_BIT_PWR_ACCL_STBY);
+ if (result)
+ return result;
+ result = inv_mpu6050_set_power_itg(st, false);
+ if (result)
+ return result;
+ }
+ st->chip_config.enable = enable;
+
+ return 0;
+}
+
+/**
+ * inv_mpu_data_rdy_trigger_set_state() - set data ready interrupt state
+ * @trig: Trigger instance
+ * @state: Desired trigger state
+ */
+static int inv_mpu_data_rdy_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ return inv_mpu6050_set_enable(iio_trigger_get_drvdata(trig), state);
+}
+
+static const struct iio_trigger_ops inv_mpu_trigger_ops = {
+ .owner = THIS_MODULE,
+ .set_trigger_state = &inv_mpu_data_rdy_trigger_set_state,
+};
+
+int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev)
+{
+ int ret;
+ struct inv_mpu6050_state *st = iio_priv(indio_dev);
+
+ st->trig = devm_iio_trigger_alloc(&indio_dev->dev,
+ "%s-dev%d",
+ indio_dev->name,
+ indio_dev->id);
+ if (!st->trig)
+ return -ENOMEM;
+
+ ret = devm_request_irq(&indio_dev->dev, st->client->irq,
+ &iio_trigger_generic_data_rdy_poll,
+ IRQF_TRIGGER_RISING,
+ "inv_mpu",
+ st->trig);
+ if (ret)
+ return ret;
+
+ st->trig->dev.parent = &st->client->dev;
+ st->trig->ops = &inv_mpu_trigger_ops;
+ iio_trigger_set_drvdata(st->trig, indio_dev);
+
+ ret = iio_trigger_register(st->trig);
+ if (ret)
+ return ret;
+
+ indio_dev->trig = iio_trigger_get(st->trig);
+
+ return 0;
+}
+
+void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st)
+{
+ iio_trigger_unregister(st->trig);
+}
diff --git a/kernel/drivers/iio/imu/kmx61.c b/kernel/drivers/iio/imu/kmx61.c
new file mode 100644
index 000000000..462a01062
--- /dev/null
+++ b/kernel/drivers/iio/imu/kmx61.c
@@ -0,0 +1,1579 @@
+/*
+ * KMX61 - Kionix 6-axis Accelerometer/Magnetometer
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F).
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#define KMX61_DRV_NAME "kmx61"
+#define KMX61_GPIO_NAME "kmx61_int"
+#define KMX61_IRQ_NAME "kmx61_event"
+
+#define KMX61_REG_WHO_AM_I 0x00
+#define KMX61_REG_INS1 0x01
+#define KMX61_REG_INS2 0x02
+
+/*
+ * three 16-bit accelerometer output registers for X/Y/Z axis
+ * we use only XOUT_L as a base register, all other addresses
+ * can be obtained by applying an offset and are provided here
+ * only for clarity.
+ */
+#define KMX61_ACC_XOUT_L 0x0A
+#define KMX61_ACC_XOUT_H 0x0B
+#define KMX61_ACC_YOUT_L 0x0C
+#define KMX61_ACC_YOUT_H 0x0D
+#define KMX61_ACC_ZOUT_L 0x0E
+#define KMX61_ACC_ZOUT_H 0x0F
+
+/*
+ * one 16-bit temperature output register
+ */
+#define KMX61_TEMP_L 0x10
+#define KMX61_TEMP_H 0x11
+
+/*
+ * three 16-bit magnetometer output registers for X/Y/Z axis
+ */
+#define KMX61_MAG_XOUT_L 0x12
+#define KMX61_MAG_XOUT_H 0x13
+#define KMX61_MAG_YOUT_L 0x14
+#define KMX61_MAG_YOUT_H 0x15
+#define KMX61_MAG_ZOUT_L 0x16
+#define KMX61_MAG_ZOUT_H 0x17
+
+#define KMX61_REG_INL 0x28
+#define KMX61_REG_STBY 0x29
+#define KMX61_REG_CTRL1 0x2A
+#define KMX61_REG_CTRL2 0x2B
+#define KMX61_REG_ODCNTL 0x2C
+#define KMX61_REG_INC1 0x2D
+
+#define KMX61_REG_WUF_THRESH 0x3D
+#define KMX61_REG_WUF_TIMER 0x3E
+
+#define KMX61_ACC_STBY_BIT BIT(0)
+#define KMX61_MAG_STBY_BIT BIT(1)
+#define KMX61_ACT_STBY_BIT BIT(7)
+
+#define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT)
+
+#define KMX61_REG_INS1_BIT_WUFS BIT(1)
+
+#define KMX61_REG_INS2_BIT_ZP BIT(0)
+#define KMX61_REG_INS2_BIT_ZN BIT(1)
+#define KMX61_REG_INS2_BIT_YP BIT(2)
+#define KMX61_REG_INS2_BIT_YN BIT(3)
+#define KMX61_REG_INS2_BIT_XP BIT(4)
+#define KMX61_REG_INS2_BIT_XN BIT(5)
+
+#define KMX61_REG_CTRL1_GSEL_MASK 0x03
+
+#define KMX61_REG_CTRL1_BIT_RES BIT(4)
+#define KMX61_REG_CTRL1_BIT_DRDYE BIT(5)
+#define KMX61_REG_CTRL1_BIT_WUFE BIT(6)
+#define KMX61_REG_CTRL1_BIT_BTSE BIT(7)
+
+#define KMX61_REG_INC1_BIT_WUFS BIT(0)
+#define KMX61_REG_INC1_BIT_DRDYM BIT(1)
+#define KMX61_REG_INC1_BIT_DRDYA BIT(2)
+#define KMX61_REG_INC1_BIT_IEN BIT(5)
+
+#define KMX61_ACC_ODR_SHIFT 0
+#define KMX61_MAG_ODR_SHIFT 4
+#define KMX61_ACC_ODR_MASK 0x0F
+#define KMX61_MAG_ODR_MASK 0xF0
+
+#define KMX61_OWUF_MASK 0x7
+
+#define KMX61_DEFAULT_WAKE_THRESH 1
+#define KMX61_DEFAULT_WAKE_DURATION 1
+
+#define KMX61_SLEEP_DELAY_MS 2000
+
+#define KMX61_CHIP_ID 0x12
+
+/* KMX61 devices */
+#define KMX61_ACC 0x01
+#define KMX61_MAG 0x02
+
+struct kmx61_data {
+ struct i2c_client *client;
+
+ /* serialize access to non-atomic ops, e.g set_mode */
+ struct mutex lock;
+
+ /* standby state */
+ bool acc_stby;
+ bool mag_stby;
+
+ /* power state */
+ bool acc_ps;
+ bool mag_ps;
+
+ /* config bits */
+ u8 range;
+ u8 odr_bits;
+ u8 wake_thresh;
+ u8 wake_duration;
+
+ /* accelerometer specific data */
+ struct iio_dev *acc_indio_dev;
+ struct iio_trigger *acc_dready_trig;
+ struct iio_trigger *motion_trig;
+ bool acc_dready_trig_on;
+ bool motion_trig_on;
+ bool ev_enable_state;
+
+ /* magnetometer specific data */
+ struct iio_dev *mag_indio_dev;
+ struct iio_trigger *mag_dready_trig;
+ bool mag_dready_trig_on;
+};
+
+enum kmx61_range {
+ KMX61_RANGE_2G,
+ KMX61_RANGE_4G,
+ KMX61_RANGE_8G,
+};
+
+enum kmx61_axis {
+ KMX61_AXIS_X,
+ KMX61_AXIS_Y,
+ KMX61_AXIS_Z,
+};
+
+static const u16 kmx61_uscale_table[] = {9582, 19163, 38326};
+
+static const struct {
+ int val;
+ int val2;
+} kmx61_samp_freq_table[] = { {12, 500000},
+ {25, 0},
+ {50, 0},
+ {100, 0},
+ {200, 0},
+ {400, 0},
+ {800, 0},
+ {1600, 0},
+ {0, 781000},
+ {1, 563000},
+ {3, 125000},
+ {6, 250000} };
+
+static const struct {
+ int val;
+ int val2;
+ int odr_bits;
+} kmx61_wake_up_odr_table[] = { {0, 781000, 0x00},
+ {1, 563000, 0x01},
+ {3, 125000, 0x02},
+ {6, 250000, 0x03},
+ {12, 500000, 0x04},
+ {25, 0, 0x05},
+ {50, 0, 0x06},
+ {100, 0, 0x06},
+ {200, 0, 0x06},
+ {400, 0, 0x06},
+ {800, 0, 0x06},
+ {1600, 0, 0x06} };
+
+static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326");
+static IIO_CONST_ATTR(magn_scale_available, "0.001465");
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+ "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800");
+
+static struct attribute *kmx61_acc_attributes[] = {
+ &iio_const_attr_accel_scale_available.dev_attr.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static struct attribute *kmx61_mag_attributes[] = {
+ &iio_const_attr_magn_scale_available.dev_attr.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group kmx61_acc_attribute_group = {
+ .attrs = kmx61_acc_attributes,
+};
+
+static const struct attribute_group kmx61_mag_attribute_group = {
+ .attrs = kmx61_mag_attributes,
+};
+
+static const struct iio_event_spec kmx61_event = {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD),
+};
+
+#define KMX61_ACC_CHAN(_axis) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_ ## _axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = KMX61_ACC, \
+ .scan_index = KMX61_AXIS_ ## _axis, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 12, \
+ .storagebits = 16, \
+ .shift = 4, \
+ .endianness = IIO_LE, \
+ }, \
+ .event_spec = &kmx61_event, \
+ .num_event_specs = 1 \
+}
+
+#define KMX61_MAG_CHAN(_axis) { \
+ .type = IIO_MAGN, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_ ## _axis, \
+ .address = KMX61_MAG, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = KMX61_AXIS_ ## _axis, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 14, \
+ .storagebits = 16, \
+ .shift = 2, \
+ .endianness = IIO_LE, \
+ }, \
+}
+
+static const struct iio_chan_spec kmx61_acc_channels[] = {
+ KMX61_ACC_CHAN(X),
+ KMX61_ACC_CHAN(Y),
+ KMX61_ACC_CHAN(Z),
+};
+
+static const struct iio_chan_spec kmx61_mag_channels[] = {
+ KMX61_MAG_CHAN(X),
+ KMX61_MAG_CHAN(Y),
+ KMX61_MAG_CHAN(Z),
+};
+
+static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data)
+{
+ struct kmx61_data **priv = iio_priv(indio_dev);
+
+ *priv = data;
+}
+
+static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev)
+{
+ return *(struct kmx61_data **)iio_priv(indio_dev);
+}
+
+static int kmx61_convert_freq_to_bit(int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++)
+ if (val == kmx61_samp_freq_table[i].val &&
+ val2 == kmx61_samp_freq_table[i].val2)
+ return i;
+ return -EINVAL;
+}
+
+static int kmx61_convert_wake_up_odr_to_bit(int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i)
+ if (kmx61_wake_up_odr_table[i].val == val &&
+ kmx61_wake_up_odr_table[i].val2 == val2)
+ return kmx61_wake_up_odr_table[i].odr_bits;
+ return -EINVAL;
+}
+
+/**
+ * kmx61_set_mode() - set KMX61 device operating mode
+ * @data - kmx61 device private data pointer
+ * @mode - bitmask, indicating operating mode for @device
+ * @device - bitmask, indicating device for which @mode needs to be set
+ * @update - update stby bits stored in device's private @data
+ *
+ * For each sensor (accelerometer/magnetometer) there are two operating modes
+ * STANDBY and OPERATION. Neither accel nor magn can be disabled independently
+ * if they are both enabled. Internal sensors state is saved in acc_stby and
+ * mag_stby members of driver's private @data.
+ */
+static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device,
+ bool update)
+{
+ int ret;
+ int acc_stby = -1, mag_stby = -1;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_stby\n");
+ return ret;
+ }
+ if (device & KMX61_ACC) {
+ if (mode & KMX61_ACC_STBY_BIT) {
+ ret |= KMX61_ACC_STBY_BIT;
+ acc_stby = 1;
+ } else {
+ ret &= ~KMX61_ACC_STBY_BIT;
+ acc_stby = 0;
+ }
+ }
+
+ if (device & KMX61_MAG) {
+ if (mode & KMX61_MAG_STBY_BIT) {
+ ret |= KMX61_MAG_STBY_BIT;
+ mag_stby = 1;
+ } else {
+ ret &= ~KMX61_MAG_STBY_BIT;
+ mag_stby = 0;
+ }
+ }
+
+ if (mode & KMX61_ACT_STBY_BIT)
+ ret |= KMX61_ACT_STBY_BIT;
+
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_stby\n");
+ return ret;
+ }
+
+ if (acc_stby != -1 && update)
+ data->acc_stby = acc_stby;
+ if (mag_stby != -1 && update)
+ data->mag_stby = mag_stby;
+
+ return 0;
+}
+
+static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_stby\n");
+ return ret;
+ }
+ *mode = 0;
+
+ if (device & KMX61_ACC) {
+ if (ret & KMX61_ACC_STBY_BIT)
+ *mode |= KMX61_ACC_STBY_BIT;
+ else
+ *mode &= ~KMX61_ACC_STBY_BIT;
+ }
+
+ if (device & KMX61_MAG) {
+ if (ret & KMX61_MAG_STBY_BIT)
+ *mode |= KMX61_MAG_STBY_BIT;
+ else
+ *mode &= ~KMX61_MAG_STBY_BIT;
+ }
+
+ return 0;
+}
+
+static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2)
+{
+ int ret, odr_bits;
+
+ odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2);
+ if (odr_bits < 0)
+ return odr_bits;
+
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2,
+ odr_bits);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
+ return ret;
+}
+
+static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device)
+{
+ int ret;
+ u8 mode;
+ int lodr_bits, odr_bits;
+
+ ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
+ if (ret < 0)
+ return ret;
+
+ lodr_bits = kmx61_convert_freq_to_bit(val, val2);
+ if (lodr_bits < 0)
+ return lodr_bits;
+
+ /* To change ODR, accel and magn must be in STDBY */
+ ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
+ true);
+ if (ret < 0)
+ return ret;
+
+ odr_bits = 0;
+ if (device & KMX61_ACC)
+ odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT;
+ if (device & KMX61_MAG)
+ odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT;
+
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL,
+ odr_bits);
+ if (ret < 0)
+ return ret;
+
+ data->odr_bits = odr_bits;
+
+ if (device & KMX61_ACC) {
+ ret = kmx61_set_wake_up_odr(data, val, val2);
+ if (ret)
+ return ret;
+ }
+
+ return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
+}
+
+static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2,
+ u8 device)
+{
+ u8 lodr_bits;
+
+ if (device & KMX61_ACC)
+ lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) &
+ KMX61_ACC_ODR_MASK;
+ else if (device & KMX61_MAG)
+ lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) &
+ KMX61_MAG_ODR_MASK;
+ else
+ return -EINVAL;
+
+ if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table))
+ return -EINVAL;
+
+ *val = kmx61_samp_freq_table[lodr_bits].val;
+ *val2 = kmx61_samp_freq_table[lodr_bits].val2;
+
+ return 0;
+}
+
+static int kmx61_set_range(struct kmx61_data *data, u8 range)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ ret &= ~KMX61_REG_CTRL1_GSEL_MASK;
+ ret |= range & KMX61_REG_CTRL1_GSEL_MASK;
+
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ data->range = range;
+
+ return 0;
+}
+
+static int kmx61_set_scale(struct kmx61_data *data, u16 uscale)
+{
+ int ret, i;
+ u8 mode;
+
+ for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) {
+ if (kmx61_uscale_table[i] == uscale) {
+ ret = kmx61_get_mode(data, &mode,
+ KMX61_ACC | KMX61_MAG);
+ if (ret < 0)
+ return ret;
+
+ ret = kmx61_set_mode(data, KMX61_ALL_STBY,
+ KMX61_ACC | KMX61_MAG, true);
+ if (ret < 0)
+ return ret;
+
+ ret = kmx61_set_range(data, i);
+ if (ret < 0)
+ return ret;
+
+ return kmx61_set_mode(data, mode,
+ KMX61_ACC | KMX61_MAG, true);
+ }
+ }
+ return -EINVAL;
+}
+
+static int kmx61_chip_init(struct kmx61_data *data)
+{
+ int ret, val, val2;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading who_am_i\n");
+ return ret;
+ }
+
+ if (ret != KMX61_CHIP_ID) {
+ dev_err(&data->client->dev,
+ "Wrong chip id, got %x expected %x\n",
+ ret, KMX61_CHIP_ID);
+ return -EINVAL;
+ }
+
+ /* set accel 12bit, 4g range */
+ ret = kmx61_set_range(data, KMX61_RANGE_4G);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_odcntl\n");
+ return ret;
+ }
+ data->odr_bits = ret;
+
+ /*
+ * set output data rate for wake up (motion detection) function
+ * to match data rate for accelerometer sampling
+ */
+ ret = kmx61_get_odr(data, &val, &val2, KMX61_ACC);
+ if (ret < 0)
+ return ret;
+
+ ret = kmx61_set_wake_up_odr(data, val, val2);
+ if (ret < 0)
+ return ret;
+
+ /* set acc/magn to OPERATION mode */
+ ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true);
+ if (ret < 0)
+ return ret;
+
+ data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH;
+ data->wake_duration = KMX61_DEFAULT_WAKE_DURATION;
+
+ return 0;
+}
+
+static int kmx61_setup_new_data_interrupt(struct kmx61_data *data,
+ bool status, u8 device)
+{
+ u8 mode;
+ int ret;
+
+ ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
+ if (ret < 0)
+ return ret;
+
+ ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (status) {
+ ret |= KMX61_REG_INC1_BIT_IEN;
+ if (device & KMX61_ACC)
+ ret |= KMX61_REG_INC1_BIT_DRDYA;
+ if (device & KMX61_MAG)
+ ret |= KMX61_REG_INC1_BIT_DRDYM;
+ } else {
+ ret &= ~KMX61_REG_INC1_BIT_IEN;
+ if (device & KMX61_ACC)
+ ret &= ~KMX61_REG_INC1_BIT_DRDYA;
+ if (device & KMX61_MAG)
+ ret &= ~KMX61_REG_INC1_BIT_DRDYM;
+ }
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KMX61_REG_CTRL1_BIT_DRDYE;
+ else
+ ret &= ~KMX61_REG_CTRL1_BIT_DRDYE;
+
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
+}
+
+static int kmx61_chip_update_thresholds(struct kmx61_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KMX61_REG_WUF_TIMER,
+ data->wake_duration);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KMX61_REG_WUF_THRESH,
+ data->wake_thresh);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n");
+
+ return ret;
+}
+
+static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data,
+ bool status)
+{
+ u8 mode;
+ int ret;
+
+ ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
+ if (ret < 0)
+ return ret;
+
+ ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+ if (ret < 0)
+ return ret;
+
+ ret = kmx61_chip_update_thresholds(data);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_inc1\n");
+ return ret;
+ }
+ if (status)
+ ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
+ else
+ ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
+
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_inc1\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE;
+ else
+ ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE);
+
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+ mode |= KMX61_ACT_STBY_BIT;
+ return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
+}
+
+/**
+ * kmx61_set_power_state() - set power state for kmx61 @device
+ * @data - kmx61 device private pointer
+ * @on - power state to be set for @device
+ * @device - bitmask indicating device for which @on state needs to be set
+ *
+ * Notice that when ACC power state needs to be set to ON and MAG is in
+ * OPERATION then we know that kmx61_runtime_resume was already called
+ * so we must set ACC OPERATION mode here. The same happens when MAG power
+ * state needs to be set to ON and ACC is in OPERATION.
+ */
+static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device)
+{
+#ifdef CONFIG_PM
+ int ret;
+
+ if (device & KMX61_ACC) {
+ if (on && !data->acc_ps && !data->mag_stby) {
+ ret = kmx61_set_mode(data, 0, KMX61_ACC, true);
+ if (ret < 0)
+ return ret;
+ }
+ data->acc_ps = on;
+ }
+ if (device & KMX61_MAG) {
+ if (on && !data->mag_ps && !data->acc_stby) {
+ ret = kmx61_set_mode(data, 0, KMX61_MAG, true);
+ if (ret < 0)
+ return ret;
+ }
+ data->mag_ps = on;
+ }
+
+ if (on) {
+ ret = pm_runtime_get_sync(&data->client->dev);
+ } else {
+ pm_runtime_mark_last_busy(&data->client->dev);
+ ret = pm_runtime_put_autosuspend(&data->client->dev);
+ }
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Failed: kmx61_set_power_state for %d, ret %d\n",
+ on, ret);
+ if (on)
+ pm_runtime_put_noidle(&data->client->dev);
+
+ return ret;
+ }
+#endif
+ return 0;
+}
+
+static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset)
+{
+ int ret;
+ u8 reg = base + offset * 2;
+
+ ret = i2c_smbus_read_word_data(data->client, reg);
+ if (ret < 0)
+ dev_err(&data->client->dev, "failed to read reg at %x\n", reg);
+
+ return ret;
+}
+
+static int kmx61_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ int ret;
+ u8 base_reg;
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_ACCEL:
+ base_reg = KMX61_ACC_XOUT_L;
+ break;
+ case IIO_MAGN:
+ base_reg = KMX61_MAG_XOUT_L;
+ break;
+ default:
+ return -EINVAL;
+ }
+ mutex_lock(&data->lock);
+
+ ret = kmx61_set_power_state(data, true, chan->address);
+ if (ret) {
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+
+ ret = kmx61_read_measurement(data, base_reg, chan->scan_index);
+ if (ret < 0) {
+ kmx61_set_power_state(data, false, chan->address);
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ *val = sign_extend32(ret >> chan->scan_type.shift,
+ chan->scan_type.realbits - 1);
+ ret = kmx61_set_power_state(data, false, chan->address);
+
+ mutex_unlock(&data->lock);
+ if (ret)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ACCEL:
+ *val = 0;
+ *val2 = kmx61_uscale_table[data->range];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_MAGN:
+ /* 14 bits res, 1465 microGauss per magn count */
+ *val = 0;
+ *val2 = 1465;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = kmx61_get_odr(data, val, val2, chan->address);
+ mutex_unlock(&data->lock);
+ if (ret)
+ return -EINVAL;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int kmx61_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ int ret;
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = kmx61_set_odr(data, val, val2, chan->address);
+ mutex_unlock(&data->lock);
+ return ret;
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ACCEL:
+ if (val != 0)
+ return -EINVAL;
+ mutex_lock(&data->lock);
+ ret = kmx61_set_scale(data, val2);
+ mutex_unlock(&data->lock);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int kmx61_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ *val2 = 0;
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ *val = data->wake_thresh;
+ return IIO_VAL_INT;
+ case IIO_EV_INFO_PERIOD:
+ *val = data->wake_duration;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int kmx61_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ if (data->ev_enable_state)
+ return -EBUSY;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ data->wake_thresh = val;
+ return IIO_VAL_INT;
+ case IIO_EV_INFO_PERIOD:
+ data->wake_duration = val;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int kmx61_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ return data->ev_enable_state;
+}
+
+static int kmx61_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+ int ret = 0;
+
+ if (state && data->ev_enable_state)
+ return 0;
+
+ mutex_lock(&data->lock);
+
+ if (!state && data->motion_trig_on) {
+ data->ev_enable_state = false;
+ goto err_unlock;
+ }
+
+ ret = kmx61_set_power_state(data, state, KMX61_ACC);
+ if (ret < 0)
+ goto err_unlock;
+
+ ret = kmx61_setup_any_motion_interrupt(data, state);
+ if (ret < 0) {
+ kmx61_set_power_state(data, false, KMX61_ACC);
+ goto err_unlock;
+ }
+
+ data->ev_enable_state = state;
+
+err_unlock:
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev,
+ struct iio_trigger *trig)
+{
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ if (data->acc_dready_trig != trig && data->motion_trig != trig)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev,
+ struct iio_trigger *trig)
+{
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ if (data->mag_dready_trig != trig)
+ return -EINVAL;
+
+ return 0;
+}
+
+static const struct iio_info kmx61_acc_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = kmx61_read_raw,
+ .write_raw = kmx61_write_raw,
+ .attrs = &kmx61_acc_attribute_group,
+ .read_event_value = kmx61_read_event,
+ .write_event_value = kmx61_write_event,
+ .read_event_config = kmx61_read_event_config,
+ .write_event_config = kmx61_write_event_config,
+ .validate_trigger = kmx61_acc_validate_trigger,
+};
+
+static const struct iio_info kmx61_mag_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = kmx61_read_raw,
+ .write_raw = kmx61_write_raw,
+ .attrs = &kmx61_mag_attribute_group,
+ .validate_trigger = kmx61_mag_validate_trigger,
+};
+
+
+static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ int ret = 0;
+ u8 device;
+
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+ mutex_lock(&data->lock);
+
+ if (!state && data->ev_enable_state && data->motion_trig_on) {
+ data->motion_trig_on = false;
+ goto err_unlock;
+ }
+
+ if (data->acc_dready_trig == trig || data->motion_trig == trig)
+ device = KMX61_ACC;
+ else
+ device = KMX61_MAG;
+
+ ret = kmx61_set_power_state(data, state, device);
+ if (ret < 0)
+ goto err_unlock;
+
+ if (data->acc_dready_trig == trig || data->mag_dready_trig == trig)
+ ret = kmx61_setup_new_data_interrupt(data, state, device);
+ else
+ ret = kmx61_setup_any_motion_interrupt(data, state);
+ if (ret < 0) {
+ kmx61_set_power_state(data, false, device);
+ goto err_unlock;
+ }
+
+ if (data->acc_dready_trig == trig)
+ data->acc_dready_trig_on = state;
+ else if (data->mag_dready_trig == trig)
+ data->mag_dready_trig_on = state;
+ else
+ data->motion_trig_on = state;
+err_unlock:
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int kmx61_trig_try_reenable(struct iio_trigger *trig)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_inl\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct iio_trigger_ops kmx61_trigger_ops = {
+ .set_trigger_state = kmx61_data_rdy_trigger_set_state,
+ .try_reenable = kmx61_trig_try_reenable,
+ .owner = THIS_MODULE,
+};
+
+static irqreturn_t kmx61_event_handler(int irq, void *private)
+{
+ struct kmx61_data *data = private;
+ struct iio_dev *indio_dev = data->acc_indio_dev;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ins1\n");
+ goto ack_intr;
+ }
+
+ if (ret & KMX61_REG_INS1_BIT_WUFS) {
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ins2\n");
+ goto ack_intr;
+ }
+
+ if (ret & KMX61_REG_INS2_BIT_XN)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_X,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ 0);
+
+ if (ret & KMX61_REG_INS2_BIT_XP)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_X,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ 0);
+
+ if (ret & KMX61_REG_INS2_BIT_YN)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Y,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ 0);
+
+ if (ret & KMX61_REG_INS2_BIT_YP)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Y,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ 0);
+
+ if (ret & KMX61_REG_INS2_BIT_ZN)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Z,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ 0);
+
+ if (ret & KMX61_REG_INS2_BIT_ZP)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Z,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ 0);
+ }
+
+ack_intr:
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+
+ ret |= KMX61_REG_CTRL1_BIT_RES;
+ ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+
+ ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error reading reg_inl\n");
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private)
+{
+ struct kmx61_data *data = private;
+
+ if (data->acc_dready_trig_on)
+ iio_trigger_poll(data->acc_dready_trig);
+ if (data->mag_dready_trig_on)
+ iio_trigger_poll(data->mag_dready_trig);
+
+ if (data->motion_trig_on)
+ iio_trigger_poll(data->motion_trig);
+
+ if (data->ev_enable_state)
+ return IRQ_WAKE_THREAD;
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t kmx61_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct kmx61_data *data = kmx61_get_data(indio_dev);
+ int bit, ret, i = 0;
+ u8 base;
+ s16 buffer[8];
+
+ if (indio_dev == data->acc_indio_dev)
+ base = KMX61_ACC_XOUT_L;
+ else
+ base = KMX61_MAG_XOUT_L;
+
+ mutex_lock(&data->lock);
+ for_each_set_bit(bit, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = kmx61_read_measurement(data, base, bit);
+ if (ret < 0) {
+ mutex_unlock(&data->lock);
+ goto err;
+ }
+ buffer[i++] = ret;
+ }
+ mutex_unlock(&data->lock);
+
+ iio_push_to_buffers(indio_dev, buffer);
+err:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static const char *kmx61_match_acpi_device(struct device *dev)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+ return dev_name(dev);
+}
+
+static int kmx61_gpio_probe(struct i2c_client *client, struct kmx61_data *data)
+{
+ struct device *dev;
+ struct gpio_desc *gpio;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+
+ /* data ready gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, KMX61_GPIO_NAME, 0, GPIOD_IN);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_to_irq(gpio);
+
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+ return ret;
+}
+
+static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data,
+ const struct iio_info *info,
+ const struct iio_chan_spec *chan,
+ int num_channels,
+ const char *name)
+{
+ struct iio_dev *indio_dev;
+
+ indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data));
+ if (!indio_dev)
+ return ERR_PTR(-ENOMEM);
+
+ kmx61_set_data(indio_dev, data);
+
+ indio_dev->dev.parent = &data->client->dev;
+ indio_dev->channels = chan;
+ indio_dev->num_channels = num_channels;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = info;
+
+ return indio_dev;
+}
+
+static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data,
+ struct iio_dev *indio_dev,
+ const char *tag)
+{
+ struct iio_trigger *trig;
+ int ret;
+
+ trig = devm_iio_trigger_alloc(&data->client->dev,
+ "%s-%s-dev%d",
+ indio_dev->name,
+ tag,
+ indio_dev->id);
+ if (!trig)
+ return ERR_PTR(-ENOMEM);
+
+ trig->dev.parent = &data->client->dev;
+ trig->ops = &kmx61_trigger_ops;
+ iio_trigger_set_drvdata(trig, indio_dev);
+
+ ret = iio_trigger_register(trig);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return trig;
+}
+
+static int kmx61_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct kmx61_data *data;
+ const char *name = NULL;
+
+ data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+ data->client = client;
+
+ mutex_init(&data->lock);
+
+ if (id)
+ name = id->name;
+ else if (ACPI_HANDLE(&client->dev))
+ name = kmx61_match_acpi_device(&client->dev);
+ else
+ return -ENODEV;
+
+ data->acc_indio_dev =
+ kmx61_indiodev_setup(data, &kmx61_acc_info,
+ kmx61_acc_channels,
+ ARRAY_SIZE(kmx61_acc_channels),
+ name);
+ if (IS_ERR(data->acc_indio_dev))
+ return PTR_ERR(data->acc_indio_dev);
+
+ data->mag_indio_dev =
+ kmx61_indiodev_setup(data, &kmx61_mag_info,
+ kmx61_mag_channels,
+ ARRAY_SIZE(kmx61_mag_channels),
+ name);
+ if (IS_ERR(data->mag_indio_dev))
+ return PTR_ERR(data->mag_indio_dev);
+
+ ret = kmx61_chip_init(data);
+ if (ret < 0)
+ return ret;
+
+ if (client->irq < 0)
+ client->irq = kmx61_gpio_probe(client, data);
+
+ if (client->irq >= 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ kmx61_data_rdy_trig_poll,
+ kmx61_event_handler,
+ IRQF_TRIGGER_RISING,
+ KMX61_IRQ_NAME,
+ data);
+ if (ret)
+ goto err_chip_uninit;
+
+ data->acc_dready_trig =
+ kmx61_trigger_setup(data, data->acc_indio_dev,
+ "dready");
+ if (IS_ERR(data->acc_dready_trig)) {
+ ret = PTR_ERR(data->acc_dready_trig);
+ goto err_chip_uninit;
+ }
+
+ data->mag_dready_trig =
+ kmx61_trigger_setup(data, data->mag_indio_dev,
+ "dready");
+ if (IS_ERR(data->mag_dready_trig)) {
+ ret = PTR_ERR(data->mag_dready_trig);
+ goto err_trigger_unregister_acc_dready;
+ }
+
+ data->motion_trig =
+ kmx61_trigger_setup(data, data->acc_indio_dev,
+ "any-motion");
+ if (IS_ERR(data->motion_trig)) {
+ ret = PTR_ERR(data->motion_trig);
+ goto err_trigger_unregister_mag_dready;
+ }
+
+ ret = iio_triggered_buffer_setup(data->acc_indio_dev,
+ &iio_pollfunc_store_time,
+ kmx61_trigger_handler,
+ NULL);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Failed to setup acc triggered buffer\n");
+ goto err_trigger_unregister_motion;
+ }
+
+ ret = iio_triggered_buffer_setup(data->mag_indio_dev,
+ &iio_pollfunc_store_time,
+ kmx61_trigger_handler,
+ NULL);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Failed to setup mag triggered buffer\n");
+ goto err_buffer_cleanup_acc;
+ }
+ }
+
+ ret = iio_device_register(data->acc_indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to register acc iio device\n");
+ goto err_buffer_cleanup_mag;
+ }
+
+ ret = iio_device_register(data->mag_indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to register mag iio device\n");
+ goto err_iio_unregister_acc;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto err_iio_unregister_mag;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ return 0;
+
+err_iio_unregister_mag:
+ iio_device_unregister(data->mag_indio_dev);
+err_iio_unregister_acc:
+ iio_device_unregister(data->acc_indio_dev);
+err_buffer_cleanup_mag:
+ if (client->irq >= 0)
+ iio_triggered_buffer_cleanup(data->mag_indio_dev);
+err_buffer_cleanup_acc:
+ if (client->irq >= 0)
+ iio_triggered_buffer_cleanup(data->acc_indio_dev);
+err_trigger_unregister_motion:
+ iio_trigger_unregister(data->motion_trig);
+err_trigger_unregister_mag_dready:
+ iio_trigger_unregister(data->mag_dready_trig);
+err_trigger_unregister_acc_dready:
+ iio_trigger_unregister(data->acc_dready_trig);
+err_chip_uninit:
+ kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+ return ret;
+}
+
+static int kmx61_remove(struct i2c_client *client)
+{
+ struct kmx61_data *data = i2c_get_clientdata(client);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ iio_device_unregister(data->acc_indio_dev);
+ iio_device_unregister(data->mag_indio_dev);
+
+ if (client->irq >= 0) {
+ iio_triggered_buffer_cleanup(data->acc_indio_dev);
+ iio_triggered_buffer_cleanup(data->mag_indio_dev);
+ iio_trigger_unregister(data->acc_dready_trig);
+ iio_trigger_unregister(data->mag_dready_trig);
+ iio_trigger_unregister(data->motion_trig);
+ }
+
+ mutex_lock(&data->lock);
+ kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+ mutex_unlock(&data->lock);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int kmx61_suspend(struct device *dev)
+{
+ int ret;
+ struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+
+ mutex_lock(&data->lock);
+ ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
+ false);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int kmx61_resume(struct device *dev)
+{
+ u8 stby = 0;
+ struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+
+ if (data->acc_stby)
+ stby |= KMX61_ACC_STBY_BIT;
+ if (data->mag_stby)
+ stby |= KMX61_MAG_STBY_BIT;
+
+ return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
+}
+#endif
+
+#ifdef CONFIG_PM
+static int kmx61_runtime_suspend(struct device *dev)
+{
+ struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int kmx61_runtime_resume(struct device *dev)
+{
+ struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+ u8 stby = 0;
+
+ if (!data->acc_ps)
+ stby |= KMX61_ACC_STBY_BIT;
+ if (!data->mag_ps)
+ stby |= KMX61_MAG_STBY_BIT;
+
+ return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
+}
+#endif
+
+static const struct dev_pm_ops kmx61_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume)
+ SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id kmx61_acpi_match[] = {
+ {"KMX61021", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match);
+
+static const struct i2c_device_id kmx61_id[] = {
+ {"kmx611021", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, kmx61_id);
+
+static struct i2c_driver kmx61_driver = {
+ .driver = {
+ .name = KMX61_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(kmx61_acpi_match),
+ .pm = &kmx61_pm_ops,
+ },
+ .probe = kmx61_probe,
+ .remove = kmx61_remove,
+ .id_table = kmx61_id,
+};
+
+module_i2c_driver(kmx61_driver);
+
+MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
+MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver");
+MODULE_LICENSE("GPL v2");