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Diffstat (limited to 'kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c')
-rw-r--r--kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c150
1 files changed, 150 insertions, 0 deletions
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);
+}