diff options
Diffstat (limited to 'drivers/mfd/tps65912-core.c')
| -rw-r--r-- | drivers/mfd/tps65912-core.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/mfd/tps65912-core.c b/drivers/mfd/tps65912-core.c new file mode 100644 index 00000000000..10baf765554 --- /dev/null +++ b/drivers/mfd/tps65912-core.c @@ -0,0 +1,164 @@ +/* + * 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/init.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/mfd/core.h> +#include <linux/mfd/tps65912.h> + +static 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 = tps65912->dev->platform_data; + int ret, dcdc_avs, value; + + 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); + if (ret < 0) + goto err; + + return ret; + +err: + mfd_remove_devices(tps65912->dev); + kfree(tps65912); + return ret; +} + +void tps65912_device_exit(struct tps65912 *tps65912) +{ + mfd_remove_devices(tps65912->dev); + kfree(tps65912); +} + +MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>"); +MODULE_DESCRIPTION("TPS65912x chip family multi-function driver"); +MODULE_LICENSE("GPL"); |