drivers/regulator/tps6507x-regulator.c - kernel/msm - Gitiles

 /*
  * 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/delay.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,
 };

 static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table),
 				ARRAY_SIZE(VDCDCx_VSEL_table),
 				ARRAY_SIZE(VDCDCx_VSEL_table),
 				ARRAY_SIZE(LDO1_VSEL_table),
 				ARRAY_SIZE(LDO2_VSEL_table)};

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

 static const 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];
 	const 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_dcdc_is_enabled(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int data, dcdc = rdev_get_id(dev);
 	u8 shift;

 	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 		return -EINVAL;

 	shift = TPS6507X_MAX_REG_ID - dcdc;
 	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_ldo_is_enabled(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int data, ldo = rdev_get_id(dev);
 	u8 shift;

 	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 		return -EINVAL;

 	shift = TPS6507X_MAX_REG_ID - ldo;
 	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_dcdc_enable(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int dcdc = rdev_get_id(dev);
 	u8 shift;

 	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 		return -EINVAL;

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

 static int tps6507x_pmic_dcdc_disable(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int dcdc = rdev_get_id(dev);
 	u8 shift;

 	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 		return -EINVAL;

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

 static int tps6507x_pmic_ldo_enable(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int ldo = rdev_get_id(dev);
 	u8 shift;

 	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 		return -EINVAL;

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

 static int tps6507x_pmic_ldo_disable(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int ldo = rdev_get_id(dev);
 	u8 shift;

 	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 		return -EINVAL;

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

 static int tps6507x_pmic_dcdc_get_voltage(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int data, dcdc = rdev_get_id(dev);
 	u8 reg;

 	switch (dcdc) {
 	case TPS6507X_DCDC_1:
 		reg = TPS6507X_REG_DEFDCDC1;
 		break;
 	case TPS6507X_DCDC_2:
 		reg = TPS6507X_REG_DEFDCDC2_LOW;
 		break;
 	case TPS6507X_DCDC_3:
 		reg = TPS6507X_REG_DEFDCDC3_LOW;
 		break;
 	default:
 		return -EINVAL;
 	}

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

 	data &= TPS6507X_DEFDCDCX_DCDC_MASK;
 	return tps->info[dcdc]->table[data] * 1000;
 }

 static int tps6507x_pmic_dcdc_set_voltage(struct regulator_dev *dev,
 				int min_uV, int max_uV)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int data, vsel, dcdc = rdev_get_id(dev);
 	u8 reg;

 	switch (dcdc) {
 	case TPS6507X_DCDC_1:
 		reg = TPS6507X_REG_DEFDCDC1;
 		break;
 	case TPS6507X_DCDC_2:
 		reg = TPS6507X_REG_DEFDCDC2_LOW;
 		break;
 	case TPS6507X_DCDC_3:
 		reg = TPS6507X_REG_DEFDCDC3_LOW;
 		break;
 	default:
 		return -EINVAL;
 	}

 	if (min_uV < tps->info[dcdc]->min_uV
 		|| min_uV > tps->info[dcdc]->max_uV)
 		return -EINVAL;
 	if (max_uV < tps->info[dcdc]->min_uV
 		|| max_uV > tps->info[dcdc]->max_uV)
 		return -EINVAL;

 	for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
 		int mV = tps->info[dcdc]->table[vsel];
 		int uV = mV * 1000;

 		/* Break at the first in-range value */
 		if (min_uV <= uV && uV <= max_uV)
 			break;
 	}

 	/* write to the register in case we found a match */
 	if (vsel == tps->info[dcdc]->table_len)
 		return -EINVAL;

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

 	data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
 	data |= vsel;

 	return tps6507x_pmic_reg_write(tps, reg, data);
 }

 static int tps6507x_pmic_ldo_get_voltage(struct regulator_dev *dev)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int data, ldo = rdev_get_id(dev);
 	u8 reg, mask;

 	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 		return -EINVAL;
 	else {
 		reg = (ldo == TPS6507X_LDO_1 ?
 			TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 		mask = (ldo == TPS6507X_LDO_1 ?
 			TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 				TPS6507X_REG_DEFLDO2_LDO2_MASK);
 	}

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

 	data &= mask;
 	return tps->info[ldo]->table[data] * 1000;
 }

 static int tps6507x_pmic_ldo_set_voltage(struct regulator_dev *dev,
 				int min_uV, int max_uV)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int data, vsel, ldo = rdev_get_id(dev);
 	u8 reg, mask;

 	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 		return -EINVAL;
 	else {
 		reg = (ldo == TPS6507X_LDO_1 ?
 			TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 		mask = (ldo == TPS6507X_LDO_1 ?
 			TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 				TPS6507X_REG_DEFLDO2_LDO2_MASK);
 	}

 	if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
 		return -EINVAL;
 	if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
 		return -EINVAL;

 	for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
 		int mV = tps->info[ldo]->table[vsel];
 		int uV = mV * 1000;

 		/* Break at the first in-range value */
 		if (min_uV <= uV && uV <= max_uV)
 			break;
 	}

 	if (vsel == tps->info[ldo]->table_len)
 		return -EINVAL;

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

 	data &= ~mask;
 	data |= vsel;

 	return tps6507x_pmic_reg_write(tps, reg, data);
 }

 static int tps6507x_pmic_dcdc_list_voltage(struct regulator_dev *dev,
 					unsigned selector)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int dcdc = rdev_get_id(dev);

 	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 		return -EINVAL;

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

 static int tps6507x_pmic_ldo_list_voltage(struct regulator_dev *dev,
 					unsigned selector)
 {
 	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 	int ldo = rdev_get_id(dev);

 	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 		return -EINVAL;

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

 /* Operations permitted on VDCDCx */
 static struct regulator_ops tps6507x_pmic_dcdc_ops = {
 	.is_enabled = tps6507x_pmic_dcdc_is_enabled,
 	.enable = tps6507x_pmic_dcdc_enable,
 	.disable = tps6507x_pmic_dcdc_disable,
 	.get_voltage = tps6507x_pmic_dcdc_get_voltage,
 	.set_voltage = tps6507x_pmic_dcdc_set_voltage,
 	.list_voltage = tps6507x_pmic_dcdc_list_voltage,
 };

 /* Operations permitted on LDOx */
 static struct regulator_ops tps6507x_pmic_ldo_ops = {
 	.is_enabled = tps6507x_pmic_ldo_is_enabled,
 	.enable = tps6507x_pmic_ldo_enable,
 	.disable = tps6507x_pmic_ldo_disable,
 	.get_voltage = tps6507x_pmic_ldo_get_voltage,
 	.set_voltage = tps6507x_pmic_ldo_set_voltage,
 	.list_voltage = tps6507x_pmic_ldo_list_voltage,
 };

 static __devinit
 int tps6507x_pmic_probe(struct platform_device *pdev)
 {
 	struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
 	static int desc_id;
 	const struct tps_info *info = &tps6507x_pmic_regs[0];
 	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 = kzalloc(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;
 		tps->desc[i].name = info->name;
 		tps->desc[i].id = desc_id++;
 		tps->desc[i].n_voltages = num_voltages[i];
 		tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
 		&tps6507x_pmic_ldo_ops : &tps6507x_pmic_dcdc_ops);
 		tps->desc[i].type = REGULATOR_VOLTAGE;
 		tps->desc[i].owner = THIS_MODULE;

 		rdev = regulator_register(&tps->desc[i],
 					tps6507x_dev->dev, init_data, tps);
 		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;

 	return 0;

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

 	kfree(tps);
 	return error;
 }

 /**
  * tps6507x_remove - TPS6507x driver i2c remove handler
  * @client: i2c driver client device structure
  *
  * Unregister TPS driver as an i2c client device driver
  */
 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]);

 	kfree(tps);

 	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),
 };

 /**
  * tps6507x_pmic_init
  *
  * Module init function
  */
 static int __init tps6507x_pmic_init(void)
 {
 	return platform_driver_register(&tps6507x_pmic_driver);
 }
 subsys_initcall(tps6507x_pmic_init);

 /**
  * tps6507x_pmic_cleanup
  *
  * Module exit function
  */
 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");
	/*
	* 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/delay.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,
	};

	static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table),
	ARRAY_SIZE(VDCDCx_VSEL_table),
	ARRAY_SIZE(VDCDCx_VSEL_table),
	ARRAY_SIZE(LDO1_VSEL_table),
	ARRAY_SIZE(LDO2_VSEL_table)};

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

	static const 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];
	const 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_dcdc_is_enabled(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, dcdc = rdev_get_id(dev);
	u8 shift;

	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
	return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - dcdc;
	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_ldo_is_enabled(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, ldo = rdev_get_id(dev);
	u8 shift;

	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
	return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - ldo;
	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_dcdc_enable(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int dcdc = rdev_get_id(dev);
	u8 shift;

	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
	return -EINVAL;

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

	static int tps6507x_pmic_dcdc_disable(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int dcdc = rdev_get_id(dev);
	u8 shift;

	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
	return -EINVAL;

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

	static int tps6507x_pmic_ldo_enable(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int ldo = rdev_get_id(dev);
	u8 shift;

	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
	return -EINVAL;

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

	static int tps6507x_pmic_ldo_disable(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int ldo = rdev_get_id(dev);
	u8 shift;

	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
	return -EINVAL;

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

	static int tps6507x_pmic_dcdc_get_voltage(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, dcdc = rdev_get_id(dev);
	u8 reg;

	switch (dcdc) {
	case TPS6507X_DCDC_1:
	reg = TPS6507X_REG_DEFDCDC1;
	break;
	case TPS6507X_DCDC_2:
	reg = TPS6507X_REG_DEFDCDC2_LOW;
	break;
	case TPS6507X_DCDC_3:
	reg = TPS6507X_REG_DEFDCDC3_LOW;
	break;
	default:
	return -EINVAL;
	}

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

	data &= TPS6507X_DEFDCDCX_DCDC_MASK;
	return tps->info[dcdc]->table[data] * 1000;
	}

	static int tps6507x_pmic_dcdc_set_voltage(struct regulator_dev *dev,
	int min_uV, int max_uV)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, vsel, dcdc = rdev_get_id(dev);
	u8 reg;

	switch (dcdc) {
	case TPS6507X_DCDC_1:
	reg = TPS6507X_REG_DEFDCDC1;
	break;
	case TPS6507X_DCDC_2:
	reg = TPS6507X_REG_DEFDCDC2_LOW;
	break;
	case TPS6507X_DCDC_3:
	reg = TPS6507X_REG_DEFDCDC3_LOW;
	break;
	default:
	return -EINVAL;
	}

	if (min_uV < tps->info[dcdc]->min_uV
	\|\| min_uV > tps->info[dcdc]->max_uV)
	return -EINVAL;
	if (max_uV < tps->info[dcdc]->min_uV
	\|\| max_uV > tps->info[dcdc]->max_uV)
	return -EINVAL;

	for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
	int mV = tps->info[dcdc]->table[vsel];
	int uV = mV * 1000;

	/* Break at the first in-range value */
	if (min_uV <= uV && uV <= max_uV)
	break;
	}

	/* write to the register in case we found a match */
	if (vsel == tps->info[dcdc]->table_len)
	return -EINVAL;

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

	data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
	data \|= vsel;

	return tps6507x_pmic_reg_write(tps, reg, data);
	}

	static int tps6507x_pmic_ldo_get_voltage(struct regulator_dev *dev)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, ldo = rdev_get_id(dev);
	u8 reg, mask;

	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
	return -EINVAL;
	else {
	reg = (ldo == TPS6507X_LDO_1 ?
	TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
	mask = (ldo == TPS6507X_LDO_1 ?
	TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
	TPS6507X_REG_DEFLDO2_LDO2_MASK);
	}

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

	data &= mask;
	return tps->info[ldo]->table[data] * 1000;
	}

	static int tps6507x_pmic_ldo_set_voltage(struct regulator_dev *dev,
	int min_uV, int max_uV)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, vsel, ldo = rdev_get_id(dev);
	u8 reg, mask;

	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
	return -EINVAL;
	else {
	reg = (ldo == TPS6507X_LDO_1 ?
	TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
	mask = (ldo == TPS6507X_LDO_1 ?
	TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
	TPS6507X_REG_DEFLDO2_LDO2_MASK);
	}

	if (min_uV < tps->info[ldo]->min_uV \|\| min_uV > tps->info[ldo]->max_uV)
	return -EINVAL;
	if (max_uV < tps->info[ldo]->min_uV \|\| max_uV > tps->info[ldo]->max_uV)
	return -EINVAL;

	for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
	int mV = tps->info[ldo]->table[vsel];
	int uV = mV * 1000;

	/* Break at the first in-range value */
	if (min_uV <= uV && uV <= max_uV)
	break;
	}

	if (vsel == tps->info[ldo]->table_len)
	return -EINVAL;

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

	data &= ~mask;
	data \|= vsel;

	return tps6507x_pmic_reg_write(tps, reg, data);
	}

	static int tps6507x_pmic_dcdc_list_voltage(struct regulator_dev *dev,
	unsigned selector)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int dcdc = rdev_get_id(dev);

	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
	return -EINVAL;

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

	static int tps6507x_pmic_ldo_list_voltage(struct regulator_dev *dev,
	unsigned selector)
	{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int ldo = rdev_get_id(dev);

	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
	return -EINVAL;

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

	/* Operations permitted on VDCDCx */
	static struct regulator_ops tps6507x_pmic_dcdc_ops = {
	.is_enabled = tps6507x_pmic_dcdc_is_enabled,
	.enable = tps6507x_pmic_dcdc_enable,
	.disable = tps6507x_pmic_dcdc_disable,
	.get_voltage = tps6507x_pmic_dcdc_get_voltage,
	.set_voltage = tps6507x_pmic_dcdc_set_voltage,
	.list_voltage = tps6507x_pmic_dcdc_list_voltage,
	};

	/* Operations permitted on LDOx */
	static struct regulator_ops tps6507x_pmic_ldo_ops = {
	.is_enabled = tps6507x_pmic_ldo_is_enabled,
	.enable = tps6507x_pmic_ldo_enable,
	.disable = tps6507x_pmic_ldo_disable,
	.get_voltage = tps6507x_pmic_ldo_get_voltage,
	.set_voltage = tps6507x_pmic_ldo_set_voltage,
	.list_voltage = tps6507x_pmic_ldo_list_voltage,
	};

	static __devinit
	int tps6507x_pmic_probe(struct platform_device *pdev)
	{
	struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
	static int desc_id;
	const struct tps_info *info = &tps6507x_pmic_regs[0];
	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 = kzalloc(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;
	tps->desc[i].name = info->name;
	tps->desc[i].id = desc_id++;
	tps->desc[i].n_voltages = num_voltages[i];
	tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
	&tps6507x_pmic_ldo_ops : &tps6507x_pmic_dcdc_ops);
	tps->desc[i].type = REGULATOR_VOLTAGE;
	tps->desc[i].owner = THIS_MODULE;

	rdev = regulator_register(&tps->desc[i],
	tps6507x_dev->dev, init_data, tps);
	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;

	return 0;

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

	kfree(tps);
	return error;
	}

	/**
	* tps6507x_remove - TPS6507x driver i2c remove handler
	* @client: i2c driver client device structure
	*
	* Unregister TPS driver as an i2c client device driver
	*/
	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]);

	kfree(tps);

	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),
	};

	/**
	* tps6507x_pmic_init
	*
	* Module init function
	*/
	static int __init tps6507x_pmic_init(void)
	{
	return platform_driver_register(&tps6507x_pmic_driver);
	}
	subsys_initcall(tps6507x_pmic_init);

	/**
	* tps6507x_pmic_cleanup
	*
	* Module exit function
	*/
	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");