[GitHub/mt8127/android_kernel_alcatel_ttab.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,
};

static const unsigned int LDO2_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,
};

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 __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].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 = __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
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
055917ac AL	73	static const unsigned int LDO2_VSEL_table[] = {
	74	725000, 750000, 775000, 800000,
	75	825000, 850000, 875000, 900000,
	76	925000, 950000, 975000, 1000000,
	77	1025000, 1050000, 1075000, 1100000,
	78	1125000, 1150000, 1175000, 1200000,
	79	1225000, 1250000, 1275000, 1300000,
	80	1325000, 1350000, 1375000, 1400000,
	81	1425000, 1450000, 1475000, 1500000,
	82	1550000, 1600000, 1650000, 1700000,
	83	1750000, 1800000, 1850000, 1900000,
	84	1950000, 2000000, 2050000, 2100000,
	85	2150000, 2200000, 2250000, 2300000,
	86	2350000, 2400000, 2450000, 2500000,
	87	2550000, 2600000, 2650000, 2700000,
	88	2750000, 2800000, 2850000, 2900000,
	89	3000000, 3100000, 3200000, 3300000,
3fa5b8e0 AA	90	};
3fa5b8e0 AA	91
3fa5b8e0 AA	92	struct tps_info {
3fa5b8e0 AA	93	const char *name;
3fa5b8e0	94	u8 table_len;
055917ac	95	const unsigned int *table;
7d14831e AA	96
	97	/* Does DCDC high or the low register defines output voltage? */
	98	bool defdcdc_default;
3fa5b8e0 AA	99	};
3fa5b8e0 AA	100
7d14831e	101	static struct tps_info tps6507x_pmic_regs[] = {
31dd6a26 TF	102	{
31dd6a26 TF	103	.name = "VDCDC1",
31dd6a26 TF	104	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	105	.table = VDCDCx_VSEL_table,
	106	},
	107	{
	108	.name = "VDCDC2",
31dd6a26 TF	109	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	110	.table = VDCDCx_VSEL_table,
	111	},
	112	{
	113	.name = "VDCDC3",
31dd6a26 TF	114	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	115	.table = VDCDCx_VSEL_table,
	116	},
	117	{
	118	.name = "LDO1",
31dd6a26 TF	119	.table_len = ARRAY_SIZE(LDO1_VSEL_table),
	120	.table = LDO1_VSEL_table,
	121	},
	122	{
	123	.name = "LDO2",
31dd6a26 TF	124	.table_len = ARRAY_SIZE(LDO2_VSEL_table),
	125	.table = LDO2_VSEL_table,
	126	},
	127	};
	128
4ce5ba5b	129	struct tps6507x_pmic {
3fa5b8e0	130	struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
31dd6a26	131	struct tps6507x_dev *mfd;
3fa5b8e0	132	struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
7d14831e	133	struct tps_info *info[TPS6507X_NUM_REGULATOR];
3fa5b8e0 AA	134	struct mutex io_lock;
3fa5b8e0 AA	135	};
4ce5ba5b	136	static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
3fa5b8e0	137	{
31dd6a26 TF	138	u8 val;
	139	int err;
	140
	141	err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
	142
	143	if (err)
	144	return err;
	145
	146	return val;
3fa5b8e0 AA	147	}
3fa5b8e0 AA	148
4ce5ba5b	149	static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
3fa5b8e0	150	{
31dd6a26	151	return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
3fa5b8e0 AA	152	}
3fa5b8e0 AA	153
4ce5ba5b	154	static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
3fa5b8e0 AA	155	{
	156	int err, data;
	157
	158	mutex_lock(&tps->io_lock);
	159
4ce5ba5b	160	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	161	if (data < 0) {
31dd6a26	162	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	163	err = data;
	164	goto out;
	165	}
	166
	167	data \|= mask;
4ce5ba5b	168	err = tps6507x_pmic_write(tps, reg, data);
3fa5b8e0	169	if (err)
31dd6a26	170	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	171
	172	out:
	173	mutex_unlock(&tps->io_lock);
	174	return err;
	175	}
	176
4ce5ba5b	177	static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
3fa5b8e0 AA	178	{
	179	int err, data;
	180
	181	mutex_lock(&tps->io_lock);
	182
4ce5ba5b	183	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	184	if (data < 0) {
31dd6a26	185	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	186	err = data;
	187	goto out;
	188	}
	189
	190	data &= ~mask;
4ce5ba5b	191	err = tps6507x_pmic_write(tps, reg, data);
3fa5b8e0	192	if (err)
31dd6a26	193	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	194
	195	out:
	196	mutex_unlock(&tps->io_lock);
	197	return err;
	198	}
	199
4ce5ba5b	200	static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
3fa5b8e0 AA	201	{
	202	int data;
	203
	204	mutex_lock(&tps->io_lock);
	205
4ce5ba5b	206	data = tps6507x_pmic_read(tps, reg);
3fa5b8e0	207	if (data < 0)
31dd6a26	208	dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
3fa5b8e0 AA	209
	210	mutex_unlock(&tps->io_lock);
	211	return data;
	212	}
	213
4ce5ba5b	214	static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
3fa5b8e0 AA	215	{
	216	int err;
	217
	218	mutex_lock(&tps->io_lock);
	219
4ce5ba5b	220	err = tps6507x_pmic_write(tps, reg, val);
3fa5b8e0	221	if (err < 0)
31dd6a26	222	dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
3fa5b8e0 AA	223
	224	mutex_unlock(&tps->io_lock);
	225	return err;
	226	}
	227
f2933d33	228	static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
3fa5b8e0	229	{
4ce5ba5b	230	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	231	int data, rid = rdev_get_id(dev);
3fa5b8e0 AA	232	u8 shift;
3fa5b8e0 AA	233
f2933d33	234	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	235	return -EINVAL;
3fa5b8e0 AA	236
f2933d33	237	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b	238	data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
3fa5b8e0 AA	239
	240	if (data < 0)
	241	return data;
	242	else
	243	return (data & 1<<shift) ? 1 : 0;
	244	}
	245
f2933d33	246	static int tps6507x_pmic_enable(struct regulator_dev *dev)
3fa5b8e0	247	{
4ce5ba5b	248	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	249	int rid = rdev_get_id(dev);
3fa5b8e0 AA	250	u8 shift;
3fa5b8e0 AA	251
f2933d33	252	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	253	return -EINVAL;
3fa5b8e0 AA	254
f2933d33	255	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b	256	return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
3fa5b8e0 AA	257	}
3fa5b8e0 AA	258
f2933d33	259	static int tps6507x_pmic_disable(struct regulator_dev *dev)
3fa5b8e0	260	{
4ce5ba5b	261	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33	262	int rid = rdev_get_id(dev);
3fa5b8e0 AA	263	u8 shift;
3fa5b8e0 AA	264
f2933d33	265	if (rid < TPS6507X_DCDC_1 \|\| rid > TPS6507X_LDO_2)
3fa5b8e0 AA	266	return -EINVAL;
3fa5b8e0 AA	267
f2933d33	268	shift = TPS6507X_MAX_REG_ID - rid;
4ce5ba5b TF	269	return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
4ce5ba5b TF	270	1 << shift);
3fa5b8e0 AA	271	}
3fa5b8e0 AA	272
7c842a1d	273	static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
3fa5b8e0	274	{
4ce5ba5b	275	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
f2933d33 AL	276	int data, rid = rdev_get_id(dev);
f2933d33 AL	277	u8 reg, mask;
3fa5b8e0	278
f2933d33	279	switch (rid) {
3fa5b8e0 AA	280	case TPS6507X_DCDC_1:
3fa5b8e0 AA	281	reg = TPS6507X_REG_DEFDCDC1;
f2933d33	282	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	283	break;
3fa5b8e0 AA	284	case TPS6507X_DCDC_2:
f2933d33	285	if (tps->info[rid]->defdcdc_default)
7d14831e AA	286	reg = TPS6507X_REG_DEFDCDC2_HIGH;
	287	else
	288	reg = TPS6507X_REG_DEFDCDC2_LOW;
f2933d33	289	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	290	break;
3fa5b8e0 AA	291	case TPS6507X_DCDC_3:
f2933d33	292	if (tps->info[rid]->defdcdc_default)
7d14831e AA	293	reg = TPS6507X_REG_DEFDCDC3_HIGH;
	294	else
	295	reg = TPS6507X_REG_DEFDCDC3_LOW;
f2933d33 AL	296	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
	297	break;
	298	case TPS6507X_LDO_1:
	299	reg = TPS6507X_REG_LDO_CTRL1;
	300	mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
	301	break;
	302	case TPS6507X_LDO_2:
	303	reg = TPS6507X_REG_DEFLDO2;
	304	mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
3fa5b8e0 AA	305	break;
	306	default:
	307	return -EINVAL;
	308	}
	309
4ce5ba5b	310	data = tps6507x_pmic_reg_read(tps, reg);
3fa5b8e0 AA	311	if (data < 0)
	312	return data;
	313
f2933d33	314	data &= mask;
7c842a1d	315	return data;
3fa5b8e0 AA	316	}
3fa5b8e0 AA	317
ca61a7bf AL	318	static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
ca61a7bf AL	319	unsigned selector)
3fa5b8e0	320	{
4ce5ba5b	321	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
ca61a7bf	322	int data, rid = rdev_get_id(dev);
f2933d33	323	u8 reg, mask;
3fa5b8e0	324
f2933d33	325	switch (rid) {
3fa5b8e0 AA	326	case TPS6507X_DCDC_1:
3fa5b8e0 AA	327	reg = TPS6507X_REG_DEFDCDC1;
f2933d33	328	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	329	break;
3fa5b8e0 AA	330	case TPS6507X_DCDC_2:
f2933d33	331	if (tps->info[rid]->defdcdc_default)
7d14831e AA	332	reg = TPS6507X_REG_DEFDCDC2_HIGH;
	333	else
	334	reg = TPS6507X_REG_DEFDCDC2_LOW;
f2933d33	335	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
3fa5b8e0 AA	336	break;
3fa5b8e0 AA	337	case TPS6507X_DCDC_3:
f2933d33	338	if (tps->info[rid]->defdcdc_default)
7d14831e AA	339	reg = TPS6507X_REG_DEFDCDC3_HIGH;
	340	else
	341	reg = TPS6507X_REG_DEFDCDC3_LOW;
f2933d33 AL	342	mask = TPS6507X_DEFDCDCX_DCDC_MASK;
	343	break;
	344	case TPS6507X_LDO_1:
	345	reg = TPS6507X_REG_LDO_CTRL1;
	346	mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
	347	break;
	348	case TPS6507X_LDO_2:
	349	reg = TPS6507X_REG_DEFLDO2;
	350	mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
3fa5b8e0 AA	351	break;
	352	default:
	353	return -EINVAL;
	354	}
	355
4ce5ba5b	356	data = tps6507x_pmic_reg_read(tps, reg);
3fa5b8e0 AA	357	if (data < 0)
	358	return data;
	359
	360	data &= ~mask;
ca61a7bf	361	data \|= selector;
3fa5b8e0	362
4ce5ba5b	363	return tps6507x_pmic_reg_write(tps, reg, data);
3fa5b8e0 AA	364	}
3fa5b8e0 AA	365
f2933d33 AL	366	static struct regulator_ops tps6507x_pmic_ops = {
	367	.is_enabled = tps6507x_pmic_is_enabled,
	368	.enable = tps6507x_pmic_enable,
	369	.disable = tps6507x_pmic_disable,
7c842a1d	370	.get_voltage_sel = tps6507x_pmic_get_voltage_sel,
ca61a7bf	371	.set_voltage_sel = tps6507x_pmic_set_voltage_sel,
055917ac	372	.list_voltage = regulator_list_voltage_table,
3fa5b8e0 AA	373	};
3fa5b8e0 AA	374
f2933d33	375	static __devinit int tps6507x_pmic_probe(struct platform_device *pdev)
3fa5b8e0	376	{
31dd6a26	377	struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
7d14831e	378	struct tps_info *info = &tps6507x_pmic_regs[0];
c172708d	379	struct regulator_config config = { };
3fa5b8e0 AA	380	struct regulator_init_data *init_data;
3fa5b8e0 AA	381	struct regulator_dev *rdev;
4ce5ba5b	382	struct tps6507x_pmic *tps;
0bc20bba	383	struct tps6507x_board *tps_board;
3fa5b8e0	384	int i;
56c23492	385	int error;
3fa5b8e0	386
0bc20bba TF	387	/**
	388	* tps_board points to pmic related constants
	389	* coming from the board-evm file.
	390	*/
	391
31dd6a26	392	tps_board = dev_get_platdata(tps6507x_dev->dev);
0bc20bba TF	393	if (!tps_board)
	394	return -EINVAL;
	395
3fa5b8e0 AA	396	/**
	397	* init_data points to array of regulator_init structures
	398	* coming from the board-evm file.
	399	*/
0bc20bba	400	init_data = tps_board->tps6507x_pmic_init_data;
3fa5b8e0	401	if (!init_data)
0bc20bba	402	return -EINVAL;
3fa5b8e0	403
9eb0c421	404	tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
3fa5b8e0 AA	405	if (!tps)
	406	return -ENOMEM;
	407
	408	mutex_init(&tps->io_lock);
	409
	410	/* common for all regulators */
31dd6a26	411	tps->mfd = tps6507x_dev;
3fa5b8e0 AA	412
	413	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
	414	/* Register the regulators */
	415	tps->info[i] = info;
7d14831e AA	416	if (init_data->driver_data) {
	417	struct tps6507x_reg_platform_data *data =
	418	init_data->driver_data;
	419	tps->info[i]->defdcdc_default = data->defdcdc_default;
	420	}
	421
3fa5b8e0	422	tps->desc[i].name = info->name;
77fa44d0	423	tps->desc[i].id = i;
0fcdb109	424	tps->desc[i].n_voltages = info->table_len;
055917ac	425	tps->desc[i].volt_table = info->table;
f2933d33	426	tps->desc[i].ops = &tps6507x_pmic_ops;
3fa5b8e0 AA	427	tps->desc[i].type = REGULATOR_VOLTAGE;
	428	tps->desc[i].owner = THIS_MODULE;
	429
c172708d MB	430	config.dev = tps6507x_dev->dev;
	431	config.init_data = init_data;
	432	config.driver_data = tps;
	433
	434	rdev = regulator_register(&tps->desc[i], &config);
3fa5b8e0	435	if (IS_ERR(rdev)) {
31dd6a26 TF	436	dev_err(tps6507x_dev->dev,
	437	"failed to register %s regulator\n",
	438	pdev->name);
56c23492 DT	439	error = PTR_ERR(rdev);
56c23492 DT	440	goto fail;
3fa5b8e0 AA	441	}
	442
	443	/* Save regulator for cleanup */
	444	tps->rdev[i] = rdev;
	445	}
	446
31dd6a26	447	tps6507x_dev->pmic = tps;
d7399fa8	448	platform_set_drvdata(pdev, tps6507x_dev);
3fa5b8e0 AA	449
3fa5b8e0 AA	450	return 0;
56c23492 DT	451
	452	fail:
	453	while (--i >= 0)
	454	regulator_unregister(tps->rdev[i]);
56c23492	455	return error;
3fa5b8e0 AA	456	}
3fa5b8e0 AA	457
31dd6a26	458	static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
3fa5b8e0	459	{
31dd6a26 TF	460	struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
31dd6a26 TF	461	struct tps6507x_pmic *tps = tps6507x_dev->pmic;
3fa5b8e0 AA	462	int i;
	463
	464	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
	465	regulator_unregister(tps->rdev[i]);
3fa5b8e0 AA	466	return 0;
	467	}
	468
31dd6a26	469	static struct platform_driver tps6507x_pmic_driver = {
3fa5b8e0	470	.driver = {
31dd6a26	471	.name = "tps6507x-pmic",
3fa5b8e0 AA	472	.owner = THIS_MODULE,
3fa5b8e0 AA	473	},
4ce5ba5b TF	474	.probe = tps6507x_pmic_probe,
4ce5ba5b TF	475	.remove = __devexit_p(tps6507x_pmic_remove),
3fa5b8e0 AA	476	};
3fa5b8e0 AA	477
4ce5ba5b	478	static int __init tps6507x_pmic_init(void)
3fa5b8e0	479	{
31dd6a26	480	return platform_driver_register(&tps6507x_pmic_driver);
3fa5b8e0	481	}
4ce5ba5b	482	subsys_initcall(tps6507x_pmic_init);
3fa5b8e0	483
4ce5ba5b	484	static void __exit tps6507x_pmic_cleanup(void)
3fa5b8e0	485	{
31dd6a26	486	platform_driver_unregister(&tps6507x_pmic_driver);
3fa5b8e0	487	}
4ce5ba5b	488	module_exit(tps6507x_pmic_cleanup);
3fa5b8e0 AA	489
	490	MODULE_AUTHOR("Texas Instruments");
	491	MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
9e108d33	492	MODULE_LICENSE("GPL v2");
31dd6a26	493	MODULE_ALIAS("platform:tps6507x-pmic");