[linux-block.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 microVolts) */
static const unsigned int VDCDCx_VSEL_table[] = {
	725000, 750000, 775000, 800000,
	825000, 850000, 875000, 900000,
	925000, 950000, 975000, 1000000,
	1025000, 1050000, 1075000, 1100000,
	1125000, 1150000, 1175000, 1200000,
	1225000, 1250000, 1275000, 1300000,
	1325000, 1350000, 1375000, 1400000,
	1425000, 1450000, 1475000, 1500000,
	1550000, 1600000, 1650000, 1700000,
	1750000, 1800000, 1850000, 1900000,
	1950000, 2000000, 2050000, 2100000,
	2150000, 2200000, 2250000, 2300000,
	2350000, 2400000, 2450000, 2500000,
	2550000, 2600000, 2650000, 2700000,
	2750000, 2800000, 2850000, 2900000,
	3000000, 3100000, 3200000, 3300000,
};

static const unsigned int LDO1_VSEL_table[] = {
	1000000, 1100000, 1200000, 1250000,
	1300000, 1350000, 1400000, 1500000,
	1600000, 1800000, 2500000, 2750000,
	2800000, 3000000, 3100000, 3300000,
};

/* The voltage mapping table for LDO2 is the same as VDCDCx */
#define LDO2_VSEL_table VDCDCx_VSEL_table

struct tps_info {
	const char *name;
	u8 table_len;
	const unsigned int *table;

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

static struct tps_info tps6507x_pmic_regs[] = {
	{
		.name = "VDCDC1",
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "VDCDC2",
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "VDCDC3",
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "LDO1",
		.table_len = ARRAY_SIZE(LDO1_VSEL_table),
		.table = LDO1_VSEL_table,
	},
	{
		.name = "LDO2",
		.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 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 = regulator_list_voltage_table,
};

static 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].volt_table = info->table;
		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 = 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
055917ac AL	46	/* Supported voltage values for regulators (in microVolts) */
	47	static const unsigned int VDCDCx_VSEL_table[] = {
	48	725000, 750000, 775000, 800000,
	49	825000, 850000, 875000, 900000,
	50	925000, 950000, 975000, 1000000,
	51	1025000, 1050000, 1075000, 1100000,
	52	1125000, 1150000, 1175000, 1200000,
	53	1225000, 1250000, 1275000, 1300000,
	54	1325000, 1350000, 1375000, 1400000,
	55	1425000, 1450000, 1475000, 1500000,
	56	1550000, 1600000, 1650000, 1700000,
	57	1750000, 1800000, 1850000, 1900000,
	58	1950000, 2000000, 2050000, 2100000,
	59	2150000, 2200000, 2250000, 2300000,
	60	2350000, 2400000, 2450000, 2500000,
	61	2550000, 2600000, 2650000, 2700000,
	62	2750000, 2800000, 2850000, 2900000,
	63	3000000, 3100000, 3200000, 3300000,
3fa5b8e0 AA	64	};
3fa5b8e0 AA	65
055917ac AL	66	static const unsigned int LDO1_VSEL_table[] = {
	67	1000000, 1100000, 1200000, 1250000,
	68	1300000, 1350000, 1400000, 1500000,
	69	1600000, 1800000, 2500000, 2750000,
	70	2800000, 3000000, 3100000, 3300000,
3fa5b8e0 AA	71	};
3fa5b8e0 AA	72
93b07e7b AL	73	/* The voltage mapping table for LDO2 is the same as VDCDCx */
93b07e7b AL	74	#define LDO2_VSEL_table VDCDCx_VSEL_table
3fa5b8e0	75
3fa5b8e0 AA	76	struct tps_info {
3fa5b8e0 AA	77	const char *name;
3fa5b8e0	78	u8 table_len;
055917ac	79	const unsigned int *table;
7d14831e AA	80
	81	/* Does DCDC high or the low register defines output voltage? */
	82	bool defdcdc_default;
3fa5b8e0 AA	83	};
3fa5b8e0 AA	84
7d14831e	85	static struct tps_info tps6507x_pmic_regs[] = {
31dd6a26 TF	86	{
31dd6a26 TF	87	.name = "VDCDC1",
31dd6a26 TF	88	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	89	.table = VDCDCx_VSEL_table,
	90	},
	91	{
	92	.name = "VDCDC2",
31dd6a26 TF	93	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	94	.table = VDCDCx_VSEL_table,
	95	},
	96	{
	97	.name = "VDCDC3",
31dd6a26 TF	98	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	99	.table = VDCDCx_VSEL_table,
	100	},
	101	{
	102	.name = "LDO1",
31dd6a26 TF	103	.table_len = ARRAY_SIZE(LDO1_VSEL_table),
	104	.table = LDO1_VSEL_table,
	105	},
	106	{
	107	.name = "LDO2",
31dd6a26 TF	108	.table_len = ARRAY_SIZE(LDO2_VSEL_table),
	109	.table = LDO2_VSEL_table,
	110	},
	111	};
	112
4ce5ba5b	113	struct tps6507x_pmic {
3fa5b8e0	114	struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
31dd6a26	115	struct tps6507x_dev *mfd;
3fa5b8e0	116	struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
7d14831e	117	struct tps_info *info[TPS6507X_NUM_REGULATOR];
3fa5b8e0 AA	118	struct mutex io_lock;
3fa5b8e0 AA	119	};
4ce5ba5b	120	static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
3fa5b8e0	121	{
31dd6a26 TF	122	u8 val;
	123	int err;
	124
	125	err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
	126
	127	if (err)
	128	return err;
	129
	130	return val;
3fa5b8e0 AA	131	}
3fa5b8e0 AA	132
4ce5ba5b	133	static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
3fa5b8e0	134	{
31dd6a26	135	return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
3fa5b8e0 AA	136	}
3fa5b8e0 AA	137
4ce5ba5b	138	static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
3fa5b8e0 AA	139	{
	140	int err, data;
	141
	142	mutex_lock(&tps->io_lock);
	143
4ce5ba5b	144	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	145	if (data < 0) {
31dd6a26	146	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	147	err = data;
	148	goto out;
	149	}
	150
	151	data \|= mask;
4ce5ba5b	152	err = tps6507x_pmic_write(tps, reg, data);
3fa5b8e0	153	if (err)
31dd6a26	154	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	155
	156	out:
	157	mutex_unlock(&tps->io_lock);
	158	return err;
	159	}
	160
4ce5ba5b	161	static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
3fa5b8e0 AA	162	{
	163	int err, data;
	164
	165	mutex_lock(&tps->io_lock);
	166
4ce5ba5b	167	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	168	if (data < 0) {
31dd6a26	169	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	170	err = data;
	171	goto out;
	172	}
	173
	174	data &= ~mask;
4ce5ba5b	175	err = tps6507x_pmic_write(tps, reg, data);
3fa5b8e0	176	if (err)
31dd6a26	177	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	178
	179	out:
	180	mutex_unlock(&tps->io_lock);
	181	return err;
	182	}
	183
4ce5ba5b	184	static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
3fa5b8e0 AA	185	{
	186	int data;
	187
	188	mutex_lock(&tps->io_lock);
	189
4ce5ba5b	190	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	191	if (data < 0)
31dd6a26	192	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	193
	194	mutex_unlock(&tps->io_lock);
	195	return data;
	196	}
	197
4ce5ba5b	198	static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
3fa5b8e0 AA	199	{
	200	int err;
	201
	202	mutex_lock(&tps->io_lock);
	203
4ce5ba5b	204	err = tps6507x_pmic_write(tps, reg, val);
3fa5b8e0	205	if (err < 0)
31dd6a26	206	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	207
	208	mutex_unlock(&tps->io_lock);
	209	return err;
	210	}
	211
f2933d33	212	static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
3fa5b8e0	213	{
4ce5ba5b	214	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	215	int data, rid = rdev_get_id(dev);
3fa5b8e0 AA	216	u8 shift;
3fa5b8e0 AA	217
f2933d33	218	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	219	return -EINVAL;
3fa5b8e0 AA	220
f2933d33	221	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b	222	data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
3fa5b8e0 AA	223
	224	if (data < 0)
	225	return data;
	226	else
	227	return (data & 1<<shift) ? 1 : 0;
	228	}
	229
f2933d33	230	static int tps6507x_pmic_enable(struct regulator_dev *dev)
3fa5b8e0	231	{
4ce5ba5b	232	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	233	int rid = rdev_get_id(dev);
3fa5b8e0 AA	234	u8 shift;
3fa5b8e0 AA	235
f2933d33	236	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	237	return -EINVAL;
3fa5b8e0 AA	238
f2933d33	239	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b	240	return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
3fa5b8e0 AA	241	}
3fa5b8e0 AA	242
f2933d33	243	static int tps6507x_pmic_disable(struct regulator_dev *dev)
3fa5b8e0	244	{
4ce5ba5b	245	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	246	int rid = rdev_get_id(dev);
3fa5b8e0 AA	247	u8 shift;
3fa5b8e0 AA	248
f2933d33	249	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	250	return -EINVAL;
3fa5b8e0 AA	251
f2933d33	252	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b TF	253	return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
4ce5ba5b TF	254	1 << shift);
3fa5b8e0 AA	255	}
3fa5b8e0 AA	256
7c842a1d	257	static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
3fa5b8e0	258	{
4ce5ba5b	259	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33 AL	260	int data, rid = rdev_get_id(dev);
f2933d33 AL	261	u8 reg, mask;
3fa5b8e0	262
f2933d33	263	switch (rid) {
3fa5b8e0 AA	264	case TPS6507X_DCDC_1:
3fa5b8e0 AA	265	reg = TPS6507X_REG_DEFDCDC1;
f2933d33	266	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	267	break;
3fa5b8e0 AA	268	case TPS6507X_DCDC_2:
f2933d33	269	if (tps->info[rid]->defdcdc_default)
7d14831e AA	270	reg = TPS6507X_REG_DEFDCDC2_HIGH;
	271	else
	272	reg = TPS6507X_REG_DEFDCDC2_LOW;
f2933d33	273	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	274	break;
3fa5b8e0 AA	275	case TPS6507X_DCDC_3:
f2933d33	276	if (tps->info[rid]->defdcdc_default)
7d14831e AA	277	reg = TPS6507X_REG_DEFDCDC3_HIGH;
	278	else
	279	reg = TPS6507X_REG_DEFDCDC3_LOW;
f2933d33 AL	280	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
	281	break;
	282	case TPS6507X_LDO_1:
	283	reg = TPS6507X_REG_LDO_CTRL1;
	284	mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
	285	break;
	286	case TPS6507X_LDO_2:
	287	reg = TPS6507X_REG_DEFLDO2;
	288	mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
3fa5b8e0 AA	289	break;
	290	default:
	291	return -EINVAL;
	292	}
	293
4ce5ba5b	294	data = tps6507x_pmic_reg_read(tps, reg);
3fa5b8e0 AA	295	if (data < 0)
	296	return data;
	297
f2933d33	298	data &= mask;
7c842a1d	299	return data;
3fa5b8e0 AA	300	}
3fa5b8e0 AA	301
ca61a7bf AL	302	static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
ca61a7bf AL	303	unsigned selector)
3fa5b8e0	304	{
4ce5ba5b	305	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
ca61a7bf	306	int data, rid = rdev_get_id(dev);
f2933d33	307	u8 reg, mask;
3fa5b8e0	308
f2933d33	309	switch (rid) {
3fa5b8e0 AA	310	case TPS6507X_DCDC_1:
3fa5b8e0 AA	311	reg = TPS6507X_REG_DEFDCDC1;
f2933d33	312	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	313	break;
3fa5b8e0 AA	314	case TPS6507X_DCDC_2:
f2933d33	315	if (tps->info[rid]->defdcdc_default)
7d14831e AA	316	reg = TPS6507X_REG_DEFDCDC2_HIGH;
	317	else
	318	reg = TPS6507X_REG_DEFDCDC2_LOW;
f2933d33	319	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	320	break;
3fa5b8e0 AA	321	case TPS6507X_DCDC_3:
f2933d33	322	if (tps->info[rid]->defdcdc_default)
7d14831e AA	323	reg = TPS6507X_REG_DEFDCDC3_HIGH;
	324	else
	325	reg = TPS6507X_REG_DEFDCDC3_LOW;
f2933d33 AL	326	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
	327	break;
	328	case TPS6507X_LDO_1:
	329	reg = TPS6507X_REG_LDO_CTRL1;
	330	mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
	331	break;
	332	case TPS6507X_LDO_2:
	333	reg = TPS6507X_REG_DEFLDO2;
	334	mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
3fa5b8e0 AA	335	break;
	336	default:
	337	return -EINVAL;
	338	}
	339
4ce5ba5b	340	data = tps6507x_pmic_reg_read(tps, reg);
3fa5b8e0 AA	341	if (data < 0)
	342	return data;
	343
	344	data &= ~mask;
ca61a7bf	345	data \|= selector;
3fa5b8e0	346
4ce5ba5b	347	return tps6507x_pmic_reg_write(tps, reg, data);
3fa5b8e0 AA	348	}
3fa5b8e0 AA	349
f2933d33 AL	350	static struct regulator_ops tps6507x_pmic_ops = {
	351	.is_enabled = tps6507x_pmic_is_enabled,
	352	.enable = tps6507x_pmic_enable,
	353	.disable = tps6507x_pmic_disable,
7c842a1d	354	.get_voltage_sel = tps6507x_pmic_get_voltage_sel,
ca61a7bf	355	.set_voltage_sel = tps6507x_pmic_set_voltage_sel,
055917ac	356	.list_voltage = regulator_list_voltage_table,
3fa5b8e0 AA	357	};
3fa5b8e0 AA	358
a5023574	359	static int tps6507x_pmic_probe(struct platform_device *pdev)
3fa5b8e0	360	{
31dd6a26	361	struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
7d14831e	362	struct tps_info *info = &tps6507x_pmic_regs[0];
c172708d	363	struct regulator_config config = { };
3fa5b8e0 AA	364	struct regulator_init_data *init_data;
3fa5b8e0 AA	365	struct regulator_dev *rdev;
4ce5ba5b	366	struct tps6507x_pmic *tps;
0bc20bba	367	struct tps6507x_board *tps_board;
3fa5b8e0	368	int i;
56c23492	369	int error;
3fa5b8e0	370
0bc20bba TF	371	/**
	372	* tps_board points to pmic related constants
	373	* coming from the board-evm file.
	374	*/
	375
31dd6a26	376	tps_board = dev_get_platdata(tps6507x_dev->dev);
0bc20bba TF	377	if (!tps_board)
	378	return -EINVAL;
	379
3fa5b8e0 AA	380	/**
	381	* init_data points to array of regulator_init structures
	382	* coming from the board-evm file.
	383	*/
0bc20bba	384	init_data = tps_board->tps6507x_pmic_init_data;
3fa5b8e0	385	if (!init_data)
0bc20bba	386	return -EINVAL;
3fa5b8e0	387
9eb0c421	388	tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
3fa5b8e0 AA	389	if (!tps)
	390	return -ENOMEM;
	391
	392	mutex_init(&tps->io_lock);
	393
	394	/* common for all regulators */
31dd6a26	395	tps->mfd = tps6507x_dev;
3fa5b8e0 AA	396
	397	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
	398	/* Register the regulators */
	399	tps->info[i] = info;
7d14831e AA	400	if (init_data->driver_data) {
	401	struct tps6507x_reg_platform_data *data =
	402	init_data->driver_data;
	403	tps->info[i]->defdcdc_default = data->defdcdc_default;
	404	}
	405
3fa5b8e0	406	tps->desc[i].name = info->name;
77fa44d0	407	tps->desc[i].id = i;
0fcdb109	408	tps->desc[i].n_voltages = info->table_len;
055917ac	409	tps->desc[i].volt_table = info->table;
f2933d33	410	tps->desc[i].ops = &tps6507x_pmic_ops;
3fa5b8e0 AA	411	tps->desc[i].type = REGULATOR_VOLTAGE;
	412	tps->desc[i].owner = THIS_MODULE;
	413
c172708d MB	414	config.dev = tps6507x_dev->dev;
	415	config.init_data = init_data;
	416	config.driver_data = tps;
	417
	418	rdev = regulator_register(&tps->desc[i], &config);
3fa5b8e0	419	if (IS_ERR(rdev)) {
31dd6a26 TF	420	dev_err(tps6507x_dev->dev,
	421	"failed to register %s regulator\n",
	422	pdev->name);
56c23492 DT	423	error = PTR_ERR(rdev);
56c23492 DT	424	goto fail;
3fa5b8e0 AA	425	}
	426
	427	/* Save regulator for cleanup */
	428	tps->rdev[i] = rdev;
	429	}
	430
31dd6a26	431	tps6507x_dev->pmic = tps;
d7399fa8	432	platform_set_drvdata(pdev, tps6507x_dev);
3fa5b8e0 AA	433
3fa5b8e0 AA	434	return 0;
56c23492 DT	435
	436	fail:
	437	while (--i >= 0)
	438	regulator_unregister(tps->rdev[i]);
56c23492	439	return error;
3fa5b8e0 AA	440	}
3fa5b8e0 AA	441
31dd6a26	442	static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
3fa5b8e0	443	{
31dd6a26 TF	444	struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
31dd6a26 TF	445	struct tps6507x_pmic *tps = tps6507x_dev->pmic;
3fa5b8e0 AA	446	int i;
	447
	448	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
	449	regulator_unregister(tps->rdev[i]);
3fa5b8e0 AA	450	return 0;
	451	}
	452
31dd6a26	453	static struct platform_driver tps6507x_pmic_driver = {
3fa5b8e0	454	.driver = {
31dd6a26	455	.name = "tps6507x-pmic",
3fa5b8e0 AA	456	.owner = THIS_MODULE,
3fa5b8e0 AA	457	},
4ce5ba5b	458	.probe = tps6507x_pmic_probe,
5eb9f2b9	459	.remove = tps6507x_pmic_remove,
3fa5b8e0 AA	460	};
3fa5b8e0 AA	461
4ce5ba5b	462	static int __init tps6507x_pmic_init(void)
3fa5b8e0	463	{
31dd6a26	464	return platform_driver_register(&tps6507x_pmic_driver);
3fa5b8e0	465	}
4ce5ba5b	466	subsys_initcall(tps6507x_pmic_init);
3fa5b8e0	467
4ce5ba5b	468	static void __exit tps6507x_pmic_cleanup(void)
3fa5b8e0	469	{
31dd6a26	470	platform_driver_unregister(&tps6507x_pmic_driver);
3fa5b8e0	471	}
4ce5ba5b	472	module_exit(tps6507x_pmic_cleanup);
3fa5b8e0 AA	473
	474	MODULE_AUTHOR("Texas Instruments");
	475	MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
9e108d33	476	MODULE_LICENSE("GPL v2");
31dd6a26	477	MODULE_ALIAS("platform:tps6507x-pmic");