[net-next-2.6.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/i2c.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;
};

struct tps_pmic {
	struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
	struct i2c_client *client;
	struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
	const struct tps_info *info[TPS6507X_NUM_REGULATOR];
	struct mutex io_lock;
};

static inline int tps_6507x_read(struct tps_pmic *tps, u8 reg)
{
	return i2c_smbus_read_byte_data(tps->client, reg);
}

static inline int tps_6507x_write(struct tps_pmic *tps, u8 reg, u8 val)
{
	return i2c_smbus_write_byte_data(tps->client, reg, val);
}

static int tps_6507x_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
{
	int err, data;

	mutex_lock(&tps->io_lock);

	data = tps_6507x_read(tps, reg);
	if (data < 0) {
		dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
		err = data;
		goto out;
	}

	data |= mask;
	err = tps_6507x_write(tps, reg, data);
	if (err)
		dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);

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

static int tps_6507x_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
{
	int err, data;

	mutex_lock(&tps->io_lock);

	data = tps_6507x_read(tps, reg);
	if (data < 0) {
		dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
		err = data;
		goto out;
	}

	data &= ~mask;
	err = tps_6507x_write(tps, reg, data);
	if (err)
		dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);

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

static int tps_6507x_reg_read(struct tps_pmic *tps, u8 reg)
{
	int data;

	mutex_lock(&tps->io_lock);

	data = tps_6507x_read(tps, reg);
	if (data < 0)
		dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);

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

static int tps_6507x_reg_write(struct tps_pmic *tps, u8 reg, u8 val)
{
	int err;

	mutex_lock(&tps->io_lock);

	err = tps_6507x_write(tps, reg, val);
	if (err < 0)
		dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);

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

static int tps6507x_dcdc_is_enabled(struct regulator_dev *dev)
{
	struct tps_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 = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1);

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

static int tps6507x_ldo_is_enabled(struct regulator_dev *dev)
{
	struct tps_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 = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1);

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

static int tps6507x_dcdc_enable(struct regulator_dev *dev)
{
	struct tps_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 tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}

static int tps6507x_dcdc_disable(struct regulator_dev *dev)
{
	struct tps_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 tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}

static int tps6507x_ldo_enable(struct regulator_dev *dev)
{
	struct tps_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 tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}

static int tps6507x_ldo_disable(struct regulator_dev *dev)
{
	struct tps_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 tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}

static int tps6507x_dcdc_get_voltage(struct regulator_dev *dev)
{
	struct tps_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 = tps_6507x_reg_read(tps, reg);
	if (data < 0)
		return data;

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

static int tps6507x_dcdc_set_voltage(struct regulator_dev *dev,
				int min_uV, int max_uV)
{
	struct tps_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 = tps_6507x_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
	data |= vsel;

	return tps_6507x_reg_write(tps, reg, data);
}

static int tps6507x_ldo_get_voltage(struct regulator_dev *dev)
{
	struct tps_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 = tps_6507x_reg_read(tps, reg);
	if (data < 0)
		return data;

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

static int tps6507x_ldo_set_voltage(struct regulator_dev *dev,
				int min_uV, int max_uV)
{
	struct tps_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 = tps_6507x_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= ~mask;
	data |= vsel;

	return tps_6507x_reg_write(tps, reg, data);
}

static int tps6507x_dcdc_list_voltage(struct regulator_dev *dev,
					unsigned selector)
{
	struct tps_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_ldo_list_voltage(struct regulator_dev *dev,
					unsigned selector)
{
	struct tps_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_dcdc_ops = {
	.is_enabled = tps6507x_dcdc_is_enabled,
	.enable = tps6507x_dcdc_enable,
	.disable = tps6507x_dcdc_disable,
	.get_voltage = tps6507x_dcdc_get_voltage,
	.set_voltage = tps6507x_dcdc_set_voltage,
	.list_voltage = tps6507x_dcdc_list_voltage,
};

/* Operations permitted on LDOx */
static struct regulator_ops tps6507x_ldo_ops = {
	.is_enabled = tps6507x_ldo_is_enabled,
	.enable = tps6507x_ldo_enable,
	.disable = tps6507x_ldo_disable,
	.get_voltage = tps6507x_ldo_get_voltage,
	.set_voltage = tps6507x_ldo_set_voltage,
	.list_voltage = tps6507x_ldo_list_voltage,
};

static int __devinit tps_6507x_probe(struct i2c_client *client,
				     const struct i2c_device_id *id)
{
	static int desc_id;
	const struct tps_info *info = (void *)id->driver_data;
	struct regulator_init_data *init_data;
	struct regulator_dev *rdev;
	struct tps_pmic *tps;
	struct tps6507x_board *tps_board;
	int i;
	int error;

	if (!i2c_check_functionality(client->adapter,
				I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

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

	tps_board = dev_get_platdata(&client->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->client = client;

	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_ldo_ops : &tps6507x_dcdc_ops);
		tps->desc[i].type = REGULATOR_VOLTAGE;
		tps->desc[i].owner = THIS_MODULE;

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

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

	i2c_set_clientdata(client, tps);

	return 0;

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

	kfree(tps);
	return error;
}

/**
 * tps_6507x_remove - TPS6507x driver i2c remove handler
 * @client: i2c driver client device structure
 *
 * Unregister TPS driver as an i2c client device driver
 */
static int __devexit tps_6507x_remove(struct i2c_client *client)
{
	struct tps_pmic *tps = i2c_get_clientdata(client);
	int i;

	/* clear the client data in i2c */
	i2c_set_clientdata(client, NULL);

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

	kfree(tps);

	return 0;
}

static const struct tps_info tps6507x_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,
	},
};

static const struct i2c_device_id tps_6507x_id[] = {
	{.name = "tps6507x",
	.driver_data = (unsigned long) tps6507x_regs,},
	{ },
};
MODULE_DEVICE_TABLE(i2c, tps_6507x_id);

static struct i2c_driver tps_6507x_i2c_driver = {
	.driver = {
		.name = "tps6507x",
		.owner = THIS_MODULE,
	},
	.probe = tps_6507x_probe,
	.remove = __devexit_p(tps_6507x_remove),
	.id_table = tps_6507x_id,
};

/**
 * tps_6507x_init
 *
 * Module init function
 */
static int __init tps_6507x_init(void)
{
	return i2c_add_driver(&tps_6507x_i2c_driver);
}
subsys_initcall(tps_6507x_init);

/**
 * tps_6507x_cleanup
 *
 * Module exit function
 */
static void __exit tps_6507x_cleanup(void)
{
	i2c_del_driver(&tps_6507x_i2c_driver);
}
module_exit(tps_6507x_cleanup);

MODULE_AUTHOR("Texas Instruments");
MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
MODULE_LICENSE("GPL v2");
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>
	25	#include <linux/i2c.h>
	26	#include <linux/delay.h>
5a0e3ad6	27	#include <linux/slab.h>
d183fcc9	28	#include <linux/mfd/tps6507x.h>
3fa5b8e0 AA	29
	30	/* DCDC's */
	31	#define TPS6507X_DCDC_1 0
	32	#define TPS6507X_DCDC_2 1
	33	#define TPS6507X_DCDC_3 2
	34	/* LDOs */
	35	#define TPS6507X_LDO_1 3
	36	#define TPS6507X_LDO_2 4
	37
	38	#define TPS6507X_MAX_REG_ID TPS6507X_LDO_2
	39
	40	/* Number of step-down converters available */
	41	#define TPS6507X_NUM_DCDC 3
	42	/* Number of LDO voltage regulators available */
	43	#define TPS6507X_NUM_LDO 2
	44	/* Number of total regulators available */
	45	#define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
	46
	47	/* Supported voltage values for regulators (in milliVolts) */
	48	static const u16 VDCDCx_VSEL_table[] = {
	49	725, 750, 775, 800,
	50	825, 850, 875, 900,
	51	925, 950, 975, 1000,
	52	1025, 1050, 1075, 1100,
	53	1125, 1150, 1175, 1200,
	54	1225, 1250, 1275, 1300,
	55	1325, 1350, 1375, 1400,
	56	1425, 1450, 1475, 1500,
	57	1550, 1600, 1650, 1700,
	58	1750, 1800, 1850, 1900,
	59	1950, 2000, 2050, 2100,
	60	2150, 2200, 2250, 2300,
	61	2350, 2400, 2450, 2500,
	62	2550, 2600, 2650, 2700,
	63	2750, 2800, 2850, 2900,
	64	3000, 3100, 3200, 3300,
	65	};
	66
	67	static const u16 LDO1_VSEL_table[] = {
	68	1000, 1100, 1200, 1250,
	69	1300, 1350, 1400, 1500,
	70	1600, 1800, 2500, 2750,
	71	2800, 3000, 3100, 3300,
	72	};
	73
	74	static const u16 LDO2_VSEL_table[] = {
	75	725, 750, 775, 800,
	76	825, 850, 875, 900,
	77	925, 950, 975, 1000,
	78	1025, 1050, 1075, 1100,
	79	1125, 1150, 1175, 1200,
	80	1225, 1250, 1275, 1300,
	81	1325, 1350, 1375, 1400,
	82	1425, 1450, 1475, 1500,
	83	1550, 1600, 1650, 1700,
	84	1750, 1800, 1850, 1900,
	85	1950, 2000, 2050, 2100,
	86	2150, 2200, 2250, 2300,
	87	2350, 2400, 2450, 2500,
	88	2550, 2600, 2650, 2700,
	89	2750, 2800, 2850, 2900,
	90	3000, 3100, 3200, 3300,
	91	};
	92
93	static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table),
94	ARRAY_SIZE(VDCDCx_VSEL_table),
95	ARRAY_SIZE(VDCDCx_VSEL_table),
96	ARRAY_SIZE(LDO1_VSEL_table),
97	ARRAY_SIZE(LDO2_VSEL_table)};
98
99	struct tps_info {
100	const char *name;
101	unsigned min_uV;
102	unsigned max_uV;
103	u8 table_len;
104	const u16 *table;
105	};
106
107	struct tps_pmic {
108	struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
109	struct i2c_client *client;
110	struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
111	const struct tps_info *info[TPS6507X_NUM_REGULATOR];
112	struct mutex io_lock;
113	};
114
115	static inline int tps_6507x_read(struct tps_pmic *tps, u8 reg)
116	{
117	return i2c_smbus_read_byte_data(tps->client, reg);
118	}
119
120	static inline int tps_6507x_write(struct tps_pmic *tps, u8 reg, u8 val)
121	{
122	return i2c_smbus_write_byte_data(tps->client, reg, val);
123	}
124
125	static int tps_6507x_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
126	{
127	int err, data;
128
129	mutex_lock(&tps->io_lock);
130
131	data = tps_6507x_read(tps, reg);
132	if (data < 0) {
133	dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
134	err = data;
135	goto out;
136	}
137
138	data \|= mask;
139	err = tps_6507x_write(tps, reg, data);
140	if (err)
141	dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
142
143	out:
144	mutex_unlock(&tps->io_lock);
145	return err;
146	}
147
148	static int tps_6507x_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
149	{
150	int err, data;
151
152	mutex_lock(&tps->io_lock);
153
154	data = tps_6507x_read(tps, reg);
155	if (data < 0) {
156	dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
157	err = data;
158	goto out;
159	}
160
161	data &= ~mask;
162	err = tps_6507x_write(tps, reg, data);
163	if (err)
164	dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
165
166	out:
167	mutex_unlock(&tps->io_lock);
168	return err;
169	}
170
171	static int tps_6507x_reg_read(struct tps_pmic *tps, u8 reg)
172	{
173	int data;
174
175	mutex_lock(&tps->io_lock);
176
177	data = tps_6507x_read(tps, reg);
178	if (data < 0)
179	dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
180
181	mutex_unlock(&tps->io_lock);
182	return data;
183	}
184
185	static int tps_6507x_reg_write(struct tps_pmic *tps, u8 reg, u8 val)
186	{
187	int err;
188
189	mutex_lock(&tps->io_lock);
190
191	err = tps_6507x_write(tps, reg, val);
192	if (err < 0)
193	dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
194
195	mutex_unlock(&tps->io_lock);
196	return err;
197	}
198
199	static int tps6507x_dcdc_is_enabled(struct regulator_dev *dev)
200	{
201	struct tps_pmic *tps = rdev_get_drvdata(dev);
202	int data, dcdc = rdev_get_id(dev);
203	u8 shift;
204
205	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
206	return -EINVAL;
207
208	shift = TPS6507X_MAX_REG_ID - dcdc;
209	data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1);
210
211	if (data < 0)
212	return data;
213	else
214	return (data & 1<<shift) ? 1 : 0;
215	}
216
217	static int tps6507x_ldo_is_enabled(struct regulator_dev *dev)
218	{
219	struct tps_pmic *tps = rdev_get_drvdata(dev);
220	int data, ldo = rdev_get_id(dev);
221	u8 shift;
222
223	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
224	return -EINVAL;
225
226	shift = TPS6507X_MAX_REG_ID - ldo;
227	data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1);
228
229	if (data < 0)
230	return data;
231	else
232	return (data & 1<<shift) ? 1 : 0;
233	}
234
235	static int tps6507x_dcdc_enable(struct regulator_dev *dev)
236	{
237	struct tps_pmic *tps = rdev_get_drvdata(dev);
238	int dcdc = rdev_get_id(dev);
239	u8 shift;
240
241	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
242	return -EINVAL;
243
244	shift = TPS6507X_MAX_REG_ID - dcdc;
245	return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
246	}
247
248	static int tps6507x_dcdc_disable(struct regulator_dev *dev)
249	{
250	struct tps_pmic *tps = rdev_get_drvdata(dev);
251	int dcdc = rdev_get_id(dev);
252	u8 shift;
253
254	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
255	return -EINVAL;
256
257	shift = TPS6507X_MAX_REG_ID - dcdc;
258	return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
259	}
260
261	static int tps6507x_ldo_enable(struct regulator_dev *dev)
262	{
263	struct tps_pmic *tps = rdev_get_drvdata(dev);
264	int ldo = rdev_get_id(dev);
265	u8 shift;
266
267	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
268	return -EINVAL;
269
270	shift = TPS6507X_MAX_REG_ID - ldo;
271	return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
272	}
273
274	static int tps6507x_ldo_disable(struct regulator_dev *dev)
275	{
276	struct tps_pmic *tps = rdev_get_drvdata(dev);
277	int ldo = rdev_get_id(dev);
278	u8 shift;
279
280	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
281	return -EINVAL;
282
283	shift = TPS6507X_MAX_REG_ID - ldo;
284	return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
285	}
286
287	static int tps6507x_dcdc_get_voltage(struct regulator_dev *dev)
288	{
289	struct tps_pmic *tps = rdev_get_drvdata(dev);
290	int data, dcdc = rdev_get_id(dev);
291	u8 reg;
292
293	switch (dcdc) {
294	case TPS6507X_DCDC_1:
295	reg = TPS6507X_REG_DEFDCDC1;
296	break;
297	case TPS6507X_DCDC_2:
298	reg = TPS6507X_REG_DEFDCDC2_LOW;
299	break;
300	case TPS6507X_DCDC_3:
301	reg = TPS6507X_REG_DEFDCDC3_LOW;
302	break;
303	default:
304	return -EINVAL;
305	}
306
307	data = tps_6507x_reg_read(tps, reg);
308	if (data < 0)
309	return data;
310
311	data &= TPS6507X_DEFDCDCX_DCDC_MASK;
312	return tps->info[dcdc]->table[data] * 1000;
313	}
314
315	static int tps6507x_dcdc_set_voltage(struct regulator_dev *dev,
316	int min_uV, int max_uV)
317	{
318	struct tps_pmic *tps = rdev_get_drvdata(dev);
319	int data, vsel, dcdc = rdev_get_id(dev);
320	u8 reg;
321
322	switch (dcdc) {
323	case TPS6507X_DCDC_1:
324	reg = TPS6507X_REG_DEFDCDC1;
325	break;
326	case TPS6507X_DCDC_2:
327	reg = TPS6507X_REG_DEFDCDC2_LOW;
328	break;
329	case TPS6507X_DCDC_3:
330	reg = TPS6507X_REG_DEFDCDC3_LOW;
331	break;
332	default:
333	return -EINVAL;
334	}
335
336	if (min_uV < tps->info[dcdc]->min_uV
337	\|\| min_uV > tps->info[dcdc]->max_uV)
338	return -EINVAL;
339	if (max_uV < tps->info[dcdc]->min_uV
340	\|\| max_uV > tps->info[dcdc]->max_uV)
341	return -EINVAL;
342
343	for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
344	int mV = tps->info[dcdc]->table[vsel];
345	int uV = mV * 1000;
346
347	/* Break at the first in-range value */
348	if (min_uV <= uV && uV <= max_uV)
349	break;
350	}
351
352	/* write to the register in case we found a match */
353	if (vsel == tps->info[dcdc]->table_len)
354	return -EINVAL;
355
356	data = tps_6507x_reg_read(tps, reg);
357	if (data < 0)
358	return data;
359
360	data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
361	data \|= vsel;
362
363	return tps_6507x_reg_write(tps, reg, data);
364	}
365
366	static int tps6507x_ldo_get_voltage(struct regulator_dev *dev)
367	{
368	struct tps_pmic *tps = rdev_get_drvdata(dev);
369	int data, ldo = rdev_get_id(dev);
370	u8 reg, mask;
371
372	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
373	return -EINVAL;
374	else {
375	reg = (ldo == TPS6507X_LDO_1 ?
376	TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
377	mask = (ldo == TPS6507X_LDO_1 ?
378	TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
379	TPS6507X_REG_DEFLDO2_LDO2_MASK);
380	}
381
382	data = tps_6507x_reg_read(tps, reg);
383	if (data < 0)
384	return data;
385
386	data &= mask;
387	return tps->info[ldo]->table[data] * 1000;
388	}
389
390	static int tps6507x_ldo_set_voltage(struct regulator_dev *dev,
391	int min_uV, int max_uV)
392	{
393	struct tps_pmic *tps = rdev_get_drvdata(dev);
394	int data, vsel, ldo = rdev_get_id(dev);
395	u8 reg, mask;
396
397	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
398	return -EINVAL;
399	else {
400	reg = (ldo == TPS6507X_LDO_1 ?
401	TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
402	mask = (ldo == TPS6507X_LDO_1 ?
403	TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
404	TPS6507X_REG_DEFLDO2_LDO2_MASK);
405	}
406
407	if (min_uV < tps->info[ldo]->min_uV \|\| min_uV > tps->info[ldo]->max_uV)
408	return -EINVAL;
409	if (max_uV < tps->info[ldo]->min_uV \|\| max_uV > tps->info[ldo]->max_uV)
410	return -EINVAL;
411
412	for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
413	int mV = tps->info[ldo]->table[vsel];
414	int uV = mV * 1000;
415
416	/* Break at the first in-range value */
417	if (min_uV <= uV && uV <= max_uV)
418	break;
419	}
420
421	if (vsel == tps->info[ldo]->table_len)
422	return -EINVAL;
423
424	data = tps_6507x_reg_read(tps, reg);
425	if (data < 0)
426	return data;
427
428	data &= ~mask;
429	data \|= vsel;
430
431	return tps_6507x_reg_write(tps, reg, data);
432	}
433
434	static int tps6507x_dcdc_list_voltage(struct regulator_dev *dev,
435	unsigned selector)
436	{
437	struct tps_pmic *tps = rdev_get_drvdata(dev);
438	int dcdc = rdev_get_id(dev);
439
440	if (dcdc < TPS6507X_DCDC_1 \|\| dcdc > TPS6507X_DCDC_3)
441	return -EINVAL;
442
443	if (selector >= tps->info[dcdc]->table_len)
444	return -EINVAL;
445	else
446	return tps->info[dcdc]->table[selector] * 1000;
447	}
448
449	static int tps6507x_ldo_list_voltage(struct regulator_dev *dev,
450	unsigned selector)
451	{
452	struct tps_pmic *tps = rdev_get_drvdata(dev);
453	int ldo = rdev_get_id(dev);
454
455	if (ldo < TPS6507X_LDO_1 \|\| ldo > TPS6507X_LDO_2)
456	return -EINVAL;
457
458	if (selector >= tps->info[ldo]->table_len)
459	return -EINVAL;
460	else
461	return tps->info[ldo]->table[selector] * 1000;
462	}
463
464	/* Operations permitted on VDCDCx */
465	static struct regulator_ops tps6507x_dcdc_ops = {
466	.is_enabled = tps6507x_dcdc_is_enabled,
467	.enable = tps6507x_dcdc_enable,
468	.disable = tps6507x_dcdc_disable,
469	.get_voltage = tps6507x_dcdc_get_voltage,
470	.set_voltage = tps6507x_dcdc_set_voltage,
471	.list_voltage = tps6507x_dcdc_list_voltage,
472	};
473
474	/* Operations permitted on LDOx */
475	static struct regulator_ops tps6507x_ldo_ops = {
476	.is_enabled = tps6507x_ldo_is_enabled,
477	.enable = tps6507x_ldo_enable,
478	.disable = tps6507x_ldo_disable,
479	.get_voltage = tps6507x_ldo_get_voltage,
480	.set_voltage = tps6507x_ldo_set_voltage,
481	.list_voltage = tps6507x_ldo_list_voltage,
482	};
483
56c23492 DT	484	static int __devinit tps_6507x_probe(struct i2c_client *client,
56c23492 DT	485	const struct i2c_device_id *id)
3fa5b8e0 AA	486	{
	487	static int desc_id;
	488	const struct tps_info info = (void )id->driver_data;
	489	struct regulator_init_data *init_data;
	490	struct regulator_dev *rdev;
	491	struct tps_pmic *tps;
0bc20bba	492	struct tps6507x_board *tps_board;
3fa5b8e0	493	int i;
56c23492	494	int error;
3fa5b8e0 AA	495
	496	if (!i2c_check_functionality(client->adapter,
	497	I2C_FUNC_SMBUS_BYTE_DATA))
	498	return -EIO;
	499
0bc20bba TF	500	/**
	501	* tps_board points to pmic related constants
	502	* coming from the board-evm file.
	503	*/
	504
	505	tps_board = dev_get_platdata(&client->dev);
	506	if (!tps_board)
	507	return -EINVAL;
	508
3fa5b8e0 AA	509	/**
	510	* init_data points to array of regulator_init structures
	511	* coming from the board-evm file.
	512	*/
0bc20bba	513	init_data = tps_board->tps6507x_pmic_init_data;
3fa5b8e0	514	if (!init_data)
0bc20bba	515	return -EINVAL;
3fa5b8e0 AA	516
	517	tps = kzalloc(sizeof(*tps), GFP_KERNEL);
	518	if (!tps)
	519	return -ENOMEM;
	520
	521	mutex_init(&tps->io_lock);
	522
	523	/* common for all regulators */
	524	tps->client = client;
	525
	526	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
	527	/* Register the regulators */
	528	tps->info[i] = info;
	529	tps->desc[i].name = info->name;
	530	tps->desc[i].id = desc_id++;
	531	tps->desc[i].n_voltages = num_voltages[i];
	532	tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
	533	&tps6507x_ldo_ops : &tps6507x_dcdc_ops);
	534	tps->desc[i].type = REGULATOR_VOLTAGE;
	535	tps->desc[i].owner = THIS_MODULE;
	536
	537	rdev = regulator_register(&tps->desc[i],
	538	&client->dev, init_data, tps);
	539	if (IS_ERR(rdev)) {
	540	dev_err(&client->dev, "failed to register %s\n",
	541	id->name);
56c23492 DT	542	error = PTR_ERR(rdev);
56c23492 DT	543	goto fail;
3fa5b8e0 AA	544	}
	545
	546	/* Save regulator for cleanup */
	547	tps->rdev[i] = rdev;
	548	}
	549
	550	i2c_set_clientdata(client, tps);
	551
	552	return 0;
56c23492 DT	553
	554	fail:
	555	while (--i >= 0)
	556	regulator_unregister(tps->rdev[i]);
	557
	558	kfree(tps);
	559	return error;
3fa5b8e0 AA	560	}
	561
	562	/**
	563	* tps_6507x_remove - TPS6507x driver i2c remove handler
	564	* @client: i2c driver client device structure
	565	*
	566	* Unregister TPS driver as an i2c client device driver
	567	*/
	568	static int __devexit tps_6507x_remove(struct i2c_client *client)
	569	{
	570	struct tps_pmic *tps = i2c_get_clientdata(client);
	571	int i;
	572
56c23492 DT	573	/* clear the client data in i2c */
	574	i2c_set_clientdata(client, NULL);
	575
3fa5b8e0 AA	576	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
	577	regulator_unregister(tps->rdev[i]);
	578
3fa5b8e0 AA	579	kfree(tps);
	580
	581	return 0;
	582	}
	583
	584	static const struct tps_info tps6507x_regs[] = {
	585	{
	586	.name = "VDCDC1",
	587	.min_uV = 725000,
	588	.max_uV = 3300000,
	589	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	590	.table = VDCDCx_VSEL_table,
	591	},
	592	{
	593	.name = "VDCDC2",
	594	.min_uV = 725000,
	595	.max_uV = 3300000,
	596	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	597	.table = VDCDCx_VSEL_table,
	598	},
	599	{
	600	.name = "VDCDC3",
	601	.min_uV = 725000,
	602	.max_uV = 3300000,
	603	.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
	604	.table = VDCDCx_VSEL_table,
	605	},
	606	{
	607	.name = "LDO1",
	608	.min_uV = 1000000,
	609	.max_uV = 3300000,
	610	.table_len = ARRAY_SIZE(LDO1_VSEL_table),
	611	.table = LDO1_VSEL_table,
	612	},
	613	{
	614	.name = "LDO2",
	615	.min_uV = 725000,
	616	.max_uV = 3300000,
	617	.table_len = ARRAY_SIZE(LDO2_VSEL_table),
	618	.table = LDO2_VSEL_table,
	619	},
	620	};
	621
9e108d33 LG	622	static const struct i2c_device_id tps_6507x_id[] = {
	623	{.name = "tps6507x",
	624	.driver_data = (unsigned long) tps6507x_regs,},
	625	{ },
3fa5b8e0 AA	626	};
	627	MODULE_DEVICE_TABLE(i2c, tps_6507x_id);
	628
	629	static struct i2c_driver tps_6507x_i2c_driver = {
	630	.driver = {
	631	.name = "tps6507x",
	632	.owner = THIS_MODULE,
	633	},
	634	.probe = tps_6507x_probe,
	635	.remove = __devexit_p(tps_6507x_remove),
9e108d33	636	.id_table = tps_6507x_id,
3fa5b8e0 AA	637	};
	638
	639	/**
	640	* tps_6507x_init
	641	*
	642	* Module init function
	643	*/
	644	static int __init tps_6507x_init(void)
	645	{
	646	return i2c_add_driver(&tps_6507x_i2c_driver);
	647	}
	648	subsys_initcall(tps_6507x_init);
	649
	650	/**
	651	* tps_6507x_cleanup
	652	*
	653	* Module exit function
	654	*/
	655	static void __exit tps_6507x_cleanup(void)
	656	{
	657	i2c_del_driver(&tps_6507x_i2c_driver);
	658	}
	659	module_exit(tps_6507x_cleanup);
	660
	661	MODULE_AUTHOR("Texas Instruments");
	662	MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
9e108d33	663	MODULE_LICENSE("GPL v2");