[deliverable/linux.git] / drivers / regulator / tps6507x-regulator.c

/*
 * tps6507x-regulator.c
 *
 * Regulator driver for TPS65073 PMIC
 *
 * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
 *
 * 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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/tps6507x.h>
#include <linux/slab.h>
#include <linux/mfd/tps6507x.h>

/* DCDC's */
#define TPS6507X_DCDC_1				0
#define TPS6507X_DCDC_2				1
#define TPS6507X_DCDC_3				2
/* LDOs */
#define TPS6507X_LDO_1				3
#define TPS6507X_LDO_2				4

#define TPS6507X_MAX_REG_ID			TPS6507X_LDO_2

/* Number of step-down converters available */
#define TPS6507X_NUM_DCDC			3
/* Number of LDO voltage regulators  available */
#define TPS6507X_NUM_LDO			2
/* Number of total regulators available */
#define TPS6507X_NUM_REGULATOR		(TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)

/* Supported voltage values for regulators (in milliVolts) */
static const u16 VDCDCx_VSEL_table[] = {
	725, 750, 775, 800,
	825, 850, 875, 900,
	925, 950, 975, 1000,
	1025, 1050, 1075, 1100,
	1125, 1150, 1175, 1200,
	1225, 1250, 1275, 1300,
	1325, 1350, 1375, 1400,
	1425, 1450, 1475, 1500,
	1550, 1600, 1650, 1700,
	1750, 1800, 1850, 1900,
	1950, 2000, 2050, 2100,
	2150, 2200, 2250, 2300,
	2350, 2400, 2450, 2500,
	2550, 2600, 2650, 2700,
	2750, 2800, 2850, 2900,
	3000, 3100, 3200, 3300,
};

static const u16 LDO1_VSEL_table[] = {
	1000, 1100, 1200, 1250,
	1300, 1350, 1400, 1500,
	1600, 1800, 2500, 2750,
	2800, 3000, 3100, 3300,
};

static const u16 LDO2_VSEL_table[] = {
	725, 750, 775, 800,
	825, 850, 875, 900,
	925, 950, 975, 1000,
	1025, 1050, 1075, 1100,
	1125, 1150, 1175, 1200,
	1225, 1250, 1275, 1300,
	1325, 1350, 1375, 1400,
	1425, 1450, 1475, 1500,
	1550, 1600, 1650, 1700,
	1750, 1800, 1850, 1900,
	1950, 2000, 2050, 2100,
	2150, 2200, 2250, 2300,
	2350, 2400, 2450, 2500,
	2550, 2600, 2650, 2700,
	2750, 2800, 2850, 2900,
	3000, 3100, 3200, 3300,
};

struct tps_info {
	const char *name;
	unsigned min_uV;
	unsigned max_uV;
	u8 table_len;
	const u16 *table;

	/* Does DCDC high or the low register defines output voltage? */
	bool defdcdc_default;
};

static struct tps_info tps6507x_pmic_regs[] = {
	{
		.name = "VDCDC1",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "VDCDC2",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "VDCDC3",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "LDO1",
		.min_uV = 1000000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(LDO1_VSEL_table),
		.table = LDO1_VSEL_table,
	},
	{
		.name = "LDO2",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(LDO2_VSEL_table),
		.table = LDO2_VSEL_table,
	},
};

struct tps6507x_pmic {
	struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
	struct tps6507x_dev *mfd;
	struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
	struct tps_info *info[TPS6507X_NUM_REGULATOR];
	struct mutex io_lock;
};
static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
{
	u8 val;
	int err;

	err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);

	if (err)
		return err;

	return val;
}

static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
{
	return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
}

static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
{
	int err, data;

	mutex_lock(&tps->io_lock);

	data = tps6507x_pmic_read(tps, reg);
	if (data < 0) {
		dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
		err = data;
		goto out;
	}

	data |= mask;
	err = tps6507x_pmic_write(tps, reg, data);
	if (err)
		dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps->io_lock);
	return err;
}

static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
{
	int err, data;

	mutex_lock(&tps->io_lock);

	data = tps6507x_pmic_read(tps, reg);
	if (data < 0) {
		dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
		err = data;
		goto out;
	}

	data &= ~mask;
	err = tps6507x_pmic_write(tps, reg, data);
	if (err)
		dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps->io_lock);
	return err;
}

static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
{
	int data;

	mutex_lock(&tps->io_lock);

	data = tps6507x_pmic_read(tps, reg);
	if (data < 0)
		dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);

	mutex_unlock(&tps->io_lock);
	return data;
}

static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
{
	int err;

	mutex_lock(&tps->io_lock);

	err = tps6507x_pmic_write(tps, reg, val);
	if (err < 0)
		dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);

	mutex_unlock(&tps->io_lock);
	return err;
}

static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, rid = rdev_get_id(dev);
	u8 shift;

	if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - rid;
	data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);

	if (data < 0)
		return data;
	else
		return (data & 1<<shift) ? 1 : 0;
}

static int tps6507x_pmic_enable(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int rid = rdev_get_id(dev);
	u8 shift;

	if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - rid;
	return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}

static int tps6507x_pmic_disable(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int rid = rdev_get_id(dev);
	u8 shift;

	if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - rid;
	return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
					1 << shift);
}

static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, rid = rdev_get_id(dev);
	u8 reg, mask;

	switch (rid) {
	case TPS6507X_DCDC_1:
		reg = TPS6507X_REG_DEFDCDC1;
		mask = TPS6507X_DEFDCDCX_DCDC_MASK;
		break;
	case TPS6507X_DCDC_2:
		if (tps->info[rid]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC2_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC2_LOW;
		mask = TPS6507X_DEFDCDCX_DCDC_MASK;
		break;
	case TPS6507X_DCDC_3:
		if (tps->info[rid]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC3_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC3_LOW;
		mask = TPS6507X_DEFDCDCX_DCDC_MASK;
		break;
	case TPS6507X_LDO_1:
		reg = TPS6507X_REG_LDO_CTRL1;
		mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
		break;
	case TPS6507X_LDO_2:
		reg = TPS6507X_REG_DEFLDO2;
		mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
		break;
	default:
		return -EINVAL;
	}

	data = tps6507x_pmic_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= mask;
	return data;
}

static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
					  unsigned selector)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, rid = rdev_get_id(dev);
	u8 reg, mask;

	switch (rid) {
	case TPS6507X_DCDC_1:
		reg = TPS6507X_REG_DEFDCDC1;
		mask = TPS6507X_DEFDCDCX_DCDC_MASK;
		break;
	case TPS6507X_DCDC_2:
		if (tps->info[rid]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC2_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC2_LOW;
		mask = TPS6507X_DEFDCDCX_DCDC_MASK;
		break;
	case TPS6507X_DCDC_3:
		if (tps->info[rid]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC3_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC3_LOW;
		mask = TPS6507X_DEFDCDCX_DCDC_MASK;
		break;
	case TPS6507X_LDO_1:
		reg = TPS6507X_REG_LDO_CTRL1;
		mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
		break;
	case TPS6507X_LDO_2:
		reg = TPS6507X_REG_DEFLDO2;
		mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
		break;
	default:
		return -EINVAL;
	}

	data = tps6507x_pmic_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= ~mask;
	data |= selector;

	return tps6507x_pmic_reg_write(tps, reg, data);
}

static int tps6507x_pmic_list_voltage(struct regulator_dev *dev,
					unsigned selector)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int rid = rdev_get_id(dev);

	if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
		return -EINVAL;

	if (selector >= tps->info[rid]->table_len)
		return -EINVAL;
	else
		return tps->info[rid]->table[selector] * 1000;
}

static struct regulator_ops tps6507x_pmic_ops = {
	.is_enabled = tps6507x_pmic_is_enabled,
	.enable = tps6507x_pmic_enable,
	.disable = tps6507x_pmic_disable,
	.get_voltage_sel = tps6507x_pmic_get_voltage_sel,
	.set_voltage_sel = tps6507x_pmic_set_voltage_sel,
	.list_voltage = tps6507x_pmic_list_voltage,
};

static __devinit int tps6507x_pmic_probe(struct platform_device *pdev)
{
	struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
	struct tps_info *info = &tps6507x_pmic_regs[0];
	struct regulator_config config = { };
	struct regulator_init_data *init_data;
	struct regulator_dev *rdev;
	struct tps6507x_pmic *tps;
	struct tps6507x_board *tps_board;
	int i;
	int error;

	/**
	 * tps_board points to pmic related constants
	 * coming from the board-evm file.
	 */

	tps_board = dev_get_platdata(tps6507x_dev->dev);
	if (!tps_board)
		return -EINVAL;

	/**
	 * init_data points to array of regulator_init structures
	 * coming from the board-evm file.
	 */
	init_data = tps_board->tps6507x_pmic_init_data;
	if (!init_data)
		return -EINVAL;

	tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
	if (!tps)
		return -ENOMEM;

	mutex_init(&tps->io_lock);

	/* common for all regulators */
	tps->mfd = tps6507x_dev;

	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
		/* Register the regulators */
		tps->info[i] = info;
		if (init_data->driver_data) {
			struct tps6507x_reg_platform_data *data =
							init_data->driver_data;
			tps->info[i]->defdcdc_default = data->defdcdc_default;
		}

		tps->desc[i].name = info->name;
		tps->desc[i].id = i;
		tps->desc[i].n_voltages = info->table_len;
		tps->desc[i].ops = &tps6507x_pmic_ops;
		tps->desc[i].type = REGULATOR_VOLTAGE;
		tps->desc[i].owner = THIS_MODULE;

		config.dev = tps6507x_dev->dev;
		config.init_data = init_data;
		config.driver_data = tps;

		rdev = regulator_register(&tps->desc[i], &config);
		if (IS_ERR(rdev)) {
			dev_err(tps6507x_dev->dev,
				"failed to register %s regulator\n",
				pdev->name);
			error = PTR_ERR(rdev);
			goto fail;
		}

		/* Save regulator for cleanup */
		tps->rdev[i] = rdev;
	}

	tps6507x_dev->pmic = tps;
	platform_set_drvdata(pdev, tps6507x_dev);

	return 0;

fail:
	while (--i >= 0)
		regulator_unregister(tps->rdev[i]);
	return error;
}

static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
{
	struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
	struct tps6507x_pmic *tps = tps6507x_dev->pmic;
	int i;

	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
		regulator_unregister(tps->rdev[i]);
	return 0;
}

static struct platform_driver tps6507x_pmic_driver = {
	.driver = {
		.name = "tps6507x-pmic",
		.owner = THIS_MODULE,
	},
	.probe = tps6507x_pmic_probe,
	.remove = __devexit_p(tps6507x_pmic_remove),
};

static int __init tps6507x_pmic_init(void)
{
	return platform_driver_register(&tps6507x_pmic_driver);
}
subsys_initcall(tps6507x_pmic_init);

static void __exit tps6507x_pmic_cleanup(void)
{
	platform_driver_unregister(&tps6507x_pmic_driver);
}
module_exit(tps6507x_pmic_cleanup);

MODULE_AUTHOR("Texas Instruments");
MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps6507x-pmic");
Commit	Line	Data
3fa5b8e0 AA	1	/*
	2	* tps6507x-regulator.c
	3	*
	4	* Regulator driver for TPS65073 PMIC
	5	*
	6	* Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation version 2.
	11	*
	12	* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
	13	* whether express or implied; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/err.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/regulator/driver.h>
	24	#include <linux/regulator/machine.h>
7d14831e	25	#include <linux/regulator/tps6507x.h>
5a0e3ad6	26	#include <linux/slab.h>
d183fcc9	27	#include <linux/mfd/tps6507x.h>
3fa5b8e0 AA	28
	29	/* DCDC's */
	30	#define TPS6507X_DCDC_1 0
	31	#define TPS6507X_DCDC_2 1
	32	#define TPS6507X_DCDC_3 2
	33	/* LDOs */
	34	#define TPS6507X_LDO_1 3
	35	#define TPS6507X_LDO_2 4
	36
	37	#define TPS6507X_MAX_REG_ID TPS6507X_LDO_2
	38
	39	/* Number of step-down converters available */
	40	#define TPS6507X_NUM_DCDC 3
	41	/* Number of LDO voltage regulators available */
	42	#define TPS6507X_NUM_LDO 2
	43	/* Number of total regulators available */
	44	#define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
	45
	46	/* Supported voltage values for regulators (in milliVolts) */
	47	static const u16 VDCDCx_VSEL_table[] = {
	48	725, 750, 775, 800,
	49	825, 850, 875, 900,
	50	925, 950, 975, 1000,
	51	1025, 1050, 1075, 1100,
	52	1125, 1150, 1175, 1200,
	53	1225, 1250, 1275, 1300,
	54	1325, 1350, 1375, 1400,
	55	1425, 1450, 1475, 1500,
	56	1550, 1600, 1650, 1700,
	57	1750, 1800, 1850, 1900,
	58	1950, 2000, 2050, 2100,
	59	2150, 2200, 2250, 2300,
	60	2350, 2400, 2450, 2500,
	61	2550, 2600, 2650, 2700,
	62	2750, 2800, 2850, 2900,
	63	3000, 3100, 3200, 3300,
	64	};
	65
	66	static const u16 LDO1_VSEL_table[] = {
	67	1000, 1100, 1200, 1250,
	68	1300, 1350, 1400, 1500,
	69	1600, 1800, 2500, 2750,
	70	2800, 3000, 3100, 3300,
	71	};
	72
	73	static const u16 LDO2_VSEL_table[] = {
	74	725, 750, 775, 800,
	75	825, 850, 875, 900,
	76	925, 950, 975, 1000,
	77	1025, 1050, 1075, 1100,
	78	1125, 1150, 1175, 1200,
	79	1225, 1250, 1275, 1300,
	80	1325, 1350, 1375, 1400,
	81	1425, 1450, 1475, 1500,
	82	1550, 1600, 1650, 1700,
	83	1750, 1800, 1850, 1900,
	84	1950, 2000, 2050, 2100,
	85	2150, 2200, 2250, 2300,
	86	2350, 2400, 2450, 2500,
	87	2550, 2600, 2650, 2700,
	88	2750, 2800, 2850, 2900,
	89	3000, 3100, 3200, 3300,
	90	};
	91
3fa5b8e0 AA	92	struct tps_info {
	93	const char *name;
	94	unsigned min_uV;
	95	unsigned max_uV;
	96	u8 table_len;
	97	const u16 *table;
7d14831e AA	98
	99	/* Does DCDC high or the low register defines output voltage? */
	100	bool defdcdc_default;
3fa5b8e0 AA	101	};
3fa5b8e0 AA	102
7d14831e	103	static struct tps_info tps6507x_pmic_regs[] = {
31dd6a26 TF	104	{
	105	.name = "VDCDC1",
	106	.min_uV = 725000,
	107	.max_uV = 3300000,
	108	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	109	.table = VDCDCx_VSEL_table,
	110	},
	111	{
	112	.name = "VDCDC2",
	113	.min_uV = 725000,
	114	.max_uV = 3300000,
	115	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	116	.table = VDCDCx_VSEL_table,
	117	},
	118	{
	119	.name = "VDCDC3",
	120	.min_uV = 725000,
	121	.max_uV = 3300000,
	122	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	123	.table = VDCDCx_VSEL_table,
	124	},
	125	{
	126	.name = "LDO1",
	127	.min_uV = 1000000,
	128	.max_uV = 3300000,
	129	.table_len = ARRAY_SIZE(LDO1_VSEL_table),
	130	.table = LDO1_VSEL_table,
	131	},
	132	{
	133	.name = "LDO2",
	134	.min_uV = 725000,
	135	.max_uV = 3300000,
	136	.table_len = ARRAY_SIZE(LDO2_VSEL_table),
	137	.table = LDO2_VSEL_table,
	138	},
	139	};
	140
4ce5ba5b	141	struct tps6507x_pmic {
3fa5b8e0	142	struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
31dd6a26	143	struct tps6507x_dev *mfd;
3fa5b8e0	144	struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
7d14831e	145	struct tps_info *info[TPS6507X_NUM_REGULATOR];
3fa5b8e0 AA	146	struct mutex io_lock;
3fa5b8e0 AA	147	};
4ce5ba5b	148	static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
3fa5b8e0	149	{
31dd6a26 TF	150	u8 val;
	151	int err;
	152
	153	err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
	154
	155	if (err)
	156	return err;
	157
	158	return val;
3fa5b8e0 AA	159	}
3fa5b8e0 AA	160
4ce5ba5b	161	static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
3fa5b8e0	162	{
31dd6a26	163	return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
3fa5b8e0 AA	164	}
3fa5b8e0 AA	165
4ce5ba5b	166	static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
3fa5b8e0 AA	167	{
	168	int err, data;
	169
	170	mutex_lock(&tps->io_lock);
	171
4ce5ba5b	172	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	173	if (data < 0) {
31dd6a26	174	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	175	err = data;
	176	goto out;
	177	}
	178
	179	data \|= mask;
4ce5ba5b	180	err = tps6507x_pmic_write(tps, reg, data);
3fa5b8e0	181	if (err)
31dd6a26	182	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	183
	184	out:
	185	mutex_unlock(&tps->io_lock);
	186	return err;
	187	}
	188
4ce5ba5b	189	static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
3fa5b8e0 AA	190	{
	191	int err, data;
	192
	193	mutex_lock(&tps->io_lock);
	194
4ce5ba5b	195	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	196	if (data < 0) {
31dd6a26	197	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	198	err = data;
	199	goto out;
	200	}
	201
	202	data &= ~mask;
4ce5ba5b	203	err = tps6507x_pmic_write(tps, reg, data);
3fa5b8e0	204	if (err)
31dd6a26	205	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	206
	207	out:
	208	mutex_unlock(&tps->io_lock);
	209	return err;
	210	}
	211
4ce5ba5b	212	static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
3fa5b8e0 AA	213	{
	214	int data;
	215
	216	mutex_lock(&tps->io_lock);
	217
4ce5ba5b	218	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	219	if (data < 0)
31dd6a26	220	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	221
	222	mutex_unlock(&tps->io_lock);
	223	return data;
	224	}
	225
4ce5ba5b	226	static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
3fa5b8e0 AA	227	{
	228	int err;
	229
	230	mutex_lock(&tps->io_lock);
	231
4ce5ba5b	232	err = tps6507x_pmic_write(tps, reg, val);
3fa5b8e0	233	if (err < 0)
31dd6a26	234	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	235
	236	mutex_unlock(&tps->io_lock);
	237	return err;
	238	}
	239
f2933d33	240	static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
3fa5b8e0	241	{
4ce5ba5b	242	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	243	int data, rid = rdev_get_id(dev);
3fa5b8e0 AA	244	u8 shift;
3fa5b8e0 AA	245
f2933d33	246	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	247	return -EINVAL;
3fa5b8e0 AA	248
f2933d33	249	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b	250	data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
3fa5b8e0 AA	251
	252	if (data < 0)
	253	return data;
	254	else
	255	return (data & 1<<shift) ? 1 : 0;
	256	}
	257
f2933d33	258	static int tps6507x_pmic_enable(struct regulator_dev *dev)
3fa5b8e0	259	{
4ce5ba5b	260	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	261	int rid = rdev_get_id(dev);
3fa5b8e0 AA	262	u8 shift;
3fa5b8e0 AA	263
f2933d33	264	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	265	return -EINVAL;
3fa5b8e0 AA	266
f2933d33	267	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b	268	return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
3fa5b8e0 AA	269	}
3fa5b8e0 AA	270
f2933d33	271	static int tps6507x_pmic_disable(struct regulator_dev *dev)
3fa5b8e0	272	{
4ce5ba5b	273	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	274	int rid = rdev_get_id(dev);
3fa5b8e0 AA	275	u8 shift;
3fa5b8e0 AA	276
f2933d33	277	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	278	return -EINVAL;
3fa5b8e0 AA	279
f2933d33	280	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b TF	281	return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
4ce5ba5b TF	282	1 << shift);
3fa5b8e0 AA	283	}
3fa5b8e0 AA	284
7c842a1d	285	static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
3fa5b8e0	286	{
4ce5ba5b	287	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33 AL	288	int data, rid = rdev_get_id(dev);
f2933d33 AL	289	u8 reg, mask;
3fa5b8e0	290
f2933d33	291	switch (rid) {
3fa5b8e0 AA	292	case TPS6507X_DCDC_1:
3fa5b8e0 AA	293	reg = TPS6507X_REG_DEFDCDC1;
f2933d33	294	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	295	break;
3fa5b8e0 AA	296	case TPS6507X_DCDC_2:
f2933d33	297	if (tps->info[rid]->defdcdc_default)
7d14831e AA	298	reg = TPS6507X_REG_DEFDCDC2_HIGH;
	299	else
	300	reg = TPS6507X_REG_DEFDCDC2_LOW;
f2933d33	301	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	302	break;
3fa5b8e0 AA	303	case TPS6507X_DCDC_3:
f2933d33	304	if (tps->info[rid]->defdcdc_default)
7d14831e AA	305	reg = TPS6507X_REG_DEFDCDC3_HIGH;
	306	else
	307	reg = TPS6507X_REG_DEFDCDC3_LOW;
f2933d33 AL	308	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
	309	break;
	310	case TPS6507X_LDO_1:
	311	reg = TPS6507X_REG_LDO_CTRL1;
	312	mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
	313	break;
	314	case TPS6507X_LDO_2:
	315	reg = TPS6507X_REG_DEFLDO2;
	316	mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
3fa5b8e0 AA	317	break;
	318	default:
	319	return -EINVAL;
	320	}
	321
4ce5ba5b	322	data = tps6507x_pmic_reg_read(tps, reg);
3fa5b8e0 AA	323	if (data < 0)
	324	return data;
	325
f2933d33	326	data &= mask;
7c842a1d	327	return data;
3fa5b8e0 AA	328	}
3fa5b8e0 AA	329
ca61a7bf AL	330	static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
ca61a7bf AL	331	unsigned selector)
3fa5b8e0	332	{
4ce5ba5b	333	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
ca61a7bf	334	int data, rid = rdev_get_id(dev);
f2933d33	335	u8 reg, mask;
3fa5b8e0	336
f2933d33	337	switch (rid) {
3fa5b8e0 AA	338	case TPS6507X_DCDC_1:
3fa5b8e0 AA	339	reg = TPS6507X_REG_DEFDCDC1;
f2933d33	340	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	341	break;
3fa5b8e0 AA	342	case TPS6507X_DCDC_2:
f2933d33	343	if (tps->info[rid]->defdcdc_default)
7d14831e AA	344	reg = TPS6507X_REG_DEFDCDC2_HIGH;
	345	else
	346	reg = TPS6507X_REG_DEFDCDC2_LOW;
f2933d33	347	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	348	break;
3fa5b8e0 AA	349	case TPS6507X_DCDC_3:
f2933d33	350	if (tps->info[rid]->defdcdc_default)
7d14831e AA	351	reg = TPS6507X_REG_DEFDCDC3_HIGH;
	352	else
	353	reg = TPS6507X_REG_DEFDCDC3_LOW;
f2933d33 AL	354	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
	355	break;
	356	case TPS6507X_LDO_1:
	357	reg = TPS6507X_REG_LDO_CTRL1;
	358	mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
	359	break;
	360	case TPS6507X_LDO_2:
	361	reg = TPS6507X_REG_DEFLDO2;
	362	mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
3fa5b8e0 AA	363	break;
	364	default:
	365	return -EINVAL;
	366	}
	367
4ce5ba5b	368	data = tps6507x_pmic_reg_read(tps, reg);
3fa5b8e0 AA	369	if (data < 0)
	370	return data;
	371
	372	data &= ~mask;
ca61a7bf	373	data \|= selector;
3fa5b8e0	374
4ce5ba5b	375	return tps6507x_pmic_reg_write(tps, reg, data);
3fa5b8e0 AA	376	}
3fa5b8e0 AA	377
f2933d33	378	static int tps6507x_pmic_list_voltage(struct regulator_dev *dev,
3fa5b8e0 AA	379	unsigned selector)
3fa5b8e0 AA	380	{
4ce5ba5b	381	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	382	int rid = rdev_get_id(dev);
3fa5b8e0	383
f2933d33	384	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	385	return -EINVAL;
3fa5b8e0 AA	386
f2933d33	387	if (selector >= tps->info[rid]->table_len)
3fa5b8e0 AA	388	return -EINVAL;
3fa5b8e0 AA	389	else
f2933d33	390	return tps->info[rid]->table[selector] * 1000;
3fa5b8e0 AA	391	}
3fa5b8e0 AA	392
f2933d33 AL	393	static struct regulator_ops tps6507x_pmic_ops = {
	394	.is_enabled = tps6507x_pmic_is_enabled,
	395	.enable = tps6507x_pmic_enable,
	396	.disable = tps6507x_pmic_disable,
7c842a1d	397	.get_voltage_sel = tps6507x_pmic_get_voltage_sel,
ca61a7bf	398	.set_voltage_sel = tps6507x_pmic_set_voltage_sel,
f2933d33	399	.list_voltage = tps6507x_pmic_list_voltage,
3fa5b8e0 AA	400	};
3fa5b8e0 AA	401
f2933d33	402	static __devinit int tps6507x_pmic_probe(struct platform_device *pdev)
3fa5b8e0	403	{
31dd6a26	404	struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
7d14831e	405	struct tps_info *info = &tps6507x_pmic_regs[0];
c172708d	406	struct regulator_config config = { };
3fa5b8e0 AA	407	struct regulator_init_data *init_data;
3fa5b8e0 AA	408	struct regulator_dev *rdev;
4ce5ba5b	409	struct tps6507x_pmic *tps;
0bc20bba	410	struct tps6507x_board *tps_board;
3fa5b8e0	411	int i;
56c23492	412	int error;
3fa5b8e0	413
0bc20bba TF	414	/**
	415	* tps_board points to pmic related constants
	416	* coming from the board-evm file.
	417	*/
	418
31dd6a26	419	tps_board = dev_get_platdata(tps6507x_dev->dev);
0bc20bba TF	420	if (!tps_board)
	421	return -EINVAL;
	422
3fa5b8e0 AA	423	/**
	424	* init_data points to array of regulator_init structures
	425	* coming from the board-evm file.
	426	*/
0bc20bba	427	init_data = tps_board->tps6507x_pmic_init_data;
3fa5b8e0	428	if (!init_data)
0bc20bba	429	return -EINVAL;
3fa5b8e0	430
9eb0c421	431	tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
3fa5b8e0 AA	432	if (!tps)
	433	return -ENOMEM;
	434
	435	mutex_init(&tps->io_lock);
	436
	437	/* common for all regulators */
31dd6a26	438	tps->mfd = tps6507x_dev;
3fa5b8e0 AA	439
	440	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
	441	/* Register the regulators */
	442	tps->info[i] = info;
7d14831e AA	443	if (init_data->driver_data) {
	444	struct tps6507x_reg_platform_data *data =
	445	init_data->driver_data;
	446	tps->info[i]->defdcdc_default = data->defdcdc_default;
	447	}
	448
3fa5b8e0	449	tps->desc[i].name = info->name;
77fa44d0	450	tps->desc[i].id = i;
0fcdb109	451	tps->desc[i].n_voltages = info->table_len;
f2933d33	452	tps->desc[i].ops = &tps6507x_pmic_ops;
3fa5b8e0 AA	453	tps->desc[i].type = REGULATOR_VOLTAGE;
	454	tps->desc[i].owner = THIS_MODULE;
	455
c172708d MB	456	config.dev = tps6507x_dev->dev;
	457	config.init_data = init_data;
	458	config.driver_data = tps;
	459
	460	rdev = regulator_register(&tps->desc[i], &config);
3fa5b8e0	461	if (IS_ERR(rdev)) {
31dd6a26 TF	462	dev_err(tps6507x_dev->dev,
	463	"failed to register %s regulator\n",
	464	pdev->name);
56c23492 DT	465	error = PTR_ERR(rdev);
56c23492 DT	466	goto fail;
3fa5b8e0 AA	467	}
	468
	469	/* Save regulator for cleanup */
	470	tps->rdev[i] = rdev;
	471	}
	472
31dd6a26	473	tps6507x_dev->pmic = tps;
d7399fa8	474	platform_set_drvdata(pdev, tps6507x_dev);
3fa5b8e0 AA	475
3fa5b8e0 AA	476	return 0;
56c23492 DT	477
	478	fail:
	479	while (--i >= 0)
	480	regulator_unregister(tps->rdev[i]);
56c23492	481	return error;
3fa5b8e0 AA	482	}
3fa5b8e0 AA	483
31dd6a26	484	static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
3fa5b8e0	485	{
31dd6a26 TF	486	struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
31dd6a26 TF	487	struct tps6507x_pmic *tps = tps6507x_dev->pmic;
3fa5b8e0 AA	488	int i;
	489
	490	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
	491	regulator_unregister(tps->rdev[i]);
3fa5b8e0 AA	492	return 0;
	493	}
	494
31dd6a26	495	static struct platform_driver tps6507x_pmic_driver = {
3fa5b8e0	496	.driver = {
31dd6a26	497	.name = "tps6507x-pmic",
3fa5b8e0 AA	498	.owner = THIS_MODULE,
3fa5b8e0 AA	499	},
4ce5ba5b TF	500	.probe = tps6507x_pmic_probe,
4ce5ba5b TF	501	.remove = __devexit_p(tps6507x_pmic_remove),
3fa5b8e0 AA	502	};
3fa5b8e0 AA	503
4ce5ba5b	504	static int __init tps6507x_pmic_init(void)
3fa5b8e0	505	{
31dd6a26	506	return platform_driver_register(&tps6507x_pmic_driver);
3fa5b8e0	507	}
4ce5ba5b	508	subsys_initcall(tps6507x_pmic_init);
3fa5b8e0	509
4ce5ba5b	510	static void __exit tps6507x_pmic_cleanup(void)
3fa5b8e0	511	{
31dd6a26	512	platform_driver_unregister(&tps6507x_pmic_driver);
3fa5b8e0	513	}
4ce5ba5b	514	module_exit(tps6507x_pmic_cleanup);
3fa5b8e0 AA	515
	516	MODULE_AUTHOR("Texas Instruments");
	517	MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
9e108d33	518	MODULE_LICENSE("GPL v2");
31dd6a26	519	MODULE_ALIAS("platform:tps6507x-pmic");