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-rw-r--r--kernel/drivers/mfd/tps65912-core.c175
1 files changed, 175 insertions, 0 deletions
diff --git a/kernel/drivers/mfd/tps65912-core.c b/kernel/drivers/mfd/tps65912-core.c
new file mode 100644
index 000000000..1f82d60b1
--- /dev/null
+++ b/kernel/drivers/mfd/tps65912-core.c
@@ -0,0 +1,175 @@
+/*
+ * tps65912-core.c -- TI TPS65912x
+ *
+ * Copyright 2011 Texas Instruments Inc.
+ *
+ * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This driver is based on wm8350 implementation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65912.h>
+
+static const struct mfd_cell tps65912s[] = {
+ {
+ .name = "tps65912-pmic",
+ },
+};
+
+int tps65912_set_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
+{
+ u8 data;
+ int err;
+
+ mutex_lock(&tps65912->io_mutex);
+
+ err = tps65912->read(tps65912, reg, 1, &data);
+ if (err) {
+ dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
+ goto out;
+ }
+
+ data |= mask;
+ err = tps65912->write(tps65912, reg, 1, &data);
+ if (err)
+ dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
+
+out:
+ mutex_unlock(&tps65912->io_mutex);
+ return err;
+}
+EXPORT_SYMBOL_GPL(tps65912_set_bits);
+
+int tps65912_clear_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
+{
+ u8 data;
+ int err;
+
+ mutex_lock(&tps65912->io_mutex);
+ err = tps65912->read(tps65912, reg, 1, &data);
+ if (err) {
+ dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
+ goto out;
+ }
+
+ data &= ~mask;
+ err = tps65912->write(tps65912, reg, 1, &data);
+ if (err)
+ dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
+
+out:
+ mutex_unlock(&tps65912->io_mutex);
+ return err;
+}
+EXPORT_SYMBOL_GPL(tps65912_clear_bits);
+
+static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
+{
+ u8 val;
+ int err;
+
+ err = tps65912->read(tps65912, reg, 1, &val);
+ if (err < 0)
+ return err;
+
+ return val;
+}
+
+static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
+{
+ return tps65912->write(tps65912, reg, 1, &val);
+}
+
+int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
+{
+ int data;
+
+ mutex_lock(&tps65912->io_mutex);
+
+ data = tps65912_read(tps65912, reg);
+ if (data < 0)
+ dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
+
+ mutex_unlock(&tps65912->io_mutex);
+ return data;
+}
+EXPORT_SYMBOL_GPL(tps65912_reg_read);
+
+int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
+{
+ int err;
+
+ mutex_lock(&tps65912->io_mutex);
+
+ err = tps65912_write(tps65912, reg, val);
+ if (err < 0)
+ dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);
+
+ mutex_unlock(&tps65912->io_mutex);
+ return err;
+}
+EXPORT_SYMBOL_GPL(tps65912_reg_write);
+
+int tps65912_device_init(struct tps65912 *tps65912)
+{
+ struct tps65912_board *pmic_plat_data = dev_get_platdata(tps65912->dev);
+ struct tps65912_platform_data *init_data;
+ int ret, dcdc_avs, value;
+
+ init_data = kzalloc(sizeof(struct tps65912_platform_data), GFP_KERNEL);
+ if (init_data == NULL)
+ return -ENOMEM;
+
+ mutex_init(&tps65912->io_mutex);
+ dev_set_drvdata(tps65912->dev, tps65912);
+
+ dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 |
+ pmic_plat_data->is_dcdc2_avs << 1 |
+ pmic_plat_data->is_dcdc3_avs << 2 |
+ pmic_plat_data->is_dcdc4_avs << 3);
+ if (dcdc_avs) {
+ tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
+ dcdc_avs |= value;
+ tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
+ }
+
+ ret = mfd_add_devices(tps65912->dev, -1,
+ tps65912s, ARRAY_SIZE(tps65912s),
+ NULL, 0, NULL);
+ if (ret < 0)
+ goto err;
+
+ init_data->irq = pmic_plat_data->irq;
+ init_data->irq_base = pmic_plat_data->irq_base;
+ ret = tps65912_irq_init(tps65912, init_data->irq, init_data);
+ if (ret < 0)
+ goto err;
+
+ kfree(init_data);
+ return ret;
+
+err:
+ kfree(init_data);
+ mfd_remove_devices(tps65912->dev);
+ return ret;
+}
+
+void tps65912_device_exit(struct tps65912 *tps65912)
+{
+ mfd_remove_devices(tps65912->dev);
+ tps65912_irq_exit(tps65912);
+}
+
+MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
+MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
+MODULE_LICENSE("GPL");