drivers/regulator/palmas-regulator.c - kernel/msm-4.9 - Gitiles

 /*
  * Driver for Regulator part of Palmas PMIC Chips
  *
  * Copyright 2011-2012 Texas Instruments Inc.
  *
  * Author: Graeme Gregory <gg@slimlogic.co.uk>
  * Author: Ian Lartey <ian@slimlogic.co.uk>
  *
  *  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;  either version 2 of the License, or (at your
  *  option) any later version.
  *
  */

 #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/slab.h>
 #include <linux/regmap.h>
 #include <linux/mfd/palmas.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/regulator/of_regulator.h>

 struct regs_info {
 	char	*name;
 	u8	vsel_addr;
 	u8	ctrl_addr;
 	u8	tstep_addr;
 };

 static const struct regs_info palmas_regs_info[] = {
 	{
 		.name		= "SMPS12",
 		.vsel_addr	= PALMAS_SMPS12_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS12_CTRL,
 		.tstep_addr	= PALMAS_SMPS12_TSTEP,
 	},
 	{
 		.name		= "SMPS123",
 		.vsel_addr	= PALMAS_SMPS12_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS12_CTRL,
 		.tstep_addr	= PALMAS_SMPS12_TSTEP,
 	},
 	{
 		.name		= "SMPS3",
 		.vsel_addr	= PALMAS_SMPS3_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS3_CTRL,
 	},
 	{
 		.name		= "SMPS45",
 		.vsel_addr	= PALMAS_SMPS45_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS45_CTRL,
 		.tstep_addr	= PALMAS_SMPS45_TSTEP,
 	},
 	{
 		.name		= "SMPS457",
 		.vsel_addr	= PALMAS_SMPS45_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS45_CTRL,
 		.tstep_addr	= PALMAS_SMPS45_TSTEP,
 	},
 	{
 		.name		= "SMPS6",
 		.vsel_addr	= PALMAS_SMPS6_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS6_CTRL,
 		.tstep_addr	= PALMAS_SMPS6_TSTEP,
 	},
 	{
 		.name		= "SMPS7",
 		.vsel_addr	= PALMAS_SMPS7_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS7_CTRL,
 	},
 	{
 		.name		= "SMPS8",
 		.vsel_addr	= PALMAS_SMPS8_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS8_CTRL,
 		.tstep_addr	= PALMAS_SMPS8_TSTEP,
 	},
 	{
 		.name		= "SMPS9",
 		.vsel_addr	= PALMAS_SMPS9_VOLTAGE,
 		.ctrl_addr	= PALMAS_SMPS9_CTRL,
 	},
 	{
 		.name		= "SMPS10",
 	},
 	{
 		.name		= "LDO1",
 		.vsel_addr	= PALMAS_LDO1_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO1_CTRL,
 	},
 	{
 		.name		= "LDO2",
 		.vsel_addr	= PALMAS_LDO2_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO2_CTRL,
 	},
 	{
 		.name		= "LDO3",
 		.vsel_addr	= PALMAS_LDO3_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO3_CTRL,
 	},
 	{
 		.name		= "LDO4",
 		.vsel_addr	= PALMAS_LDO4_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO4_CTRL,
 	},
 	{
 		.name		= "LDO5",
 		.vsel_addr	= PALMAS_LDO5_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO5_CTRL,
 	},
 	{
 		.name		= "LDO6",
 		.vsel_addr	= PALMAS_LDO6_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO6_CTRL,
 	},
 	{
 		.name		= "LDO7",
 		.vsel_addr	= PALMAS_LDO7_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO7_CTRL,
 	},
 	{
 		.name		= "LDO8",
 		.vsel_addr	= PALMAS_LDO8_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO8_CTRL,
 	},
 	{
 		.name		= "LDO9",
 		.vsel_addr	= PALMAS_LDO9_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDO9_CTRL,
 	},
 	{
 		.name		= "LDOLN",
 		.vsel_addr	= PALMAS_LDOLN_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDOLN_CTRL,
 	},
 	{
 		.name		= "LDOUSB",
 		.vsel_addr	= PALMAS_LDOUSB_VOLTAGE,
 		.ctrl_addr	= PALMAS_LDOUSB_CTRL,
 	},
 };

 #define SMPS_CTRL_MODE_OFF		0x00
 #define SMPS_CTRL_MODE_ON		0x01
 #define SMPS_CTRL_MODE_ECO		0x02
 #define SMPS_CTRL_MODE_PWM		0x03

 /* These values are derived from the data sheet. And are the number of steps
  * where there is a voltage change, the ranges at beginning and end of register
  * max/min values where there are no change are ommitted.
  *
  * So they are basically (maxV-minV)/stepV
  */
 #define PALMAS_SMPS_NUM_VOLTAGES	117
 #define PALMAS_SMPS10_NUM_VOLTAGES	2
 #define PALMAS_LDO_NUM_VOLTAGES		50

 #define SMPS10_VSEL			(1<<3)
 #define SMPS10_BOOST_EN			(1<<2)
 #define SMPS10_BYPASS_EN		(1<<1)
 #define SMPS10_SWITCH_EN		(1<<0)

 #define REGULATOR_SLAVE			0

 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
 		unsigned int *dest)
 {
 	unsigned int addr;

 	addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);

 	return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 }

 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
 		unsigned int value)
 {
 	unsigned int addr;

 	addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);

 	return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 }

 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
 		unsigned int *dest)
 {
 	unsigned int addr;

 	addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);

 	return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 }

 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
 		unsigned int value)
 {
 	unsigned int addr;

 	addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);

 	return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 }

 static int palmas_is_enabled_smps(struct regulator_dev *dev)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 	int id = rdev_get_id(dev);
 	unsigned int reg;

 	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

 	reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
 	reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;

 	return !!(reg);
 }

 static int palmas_enable_smps(struct regulator_dev *dev)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 	int id = rdev_get_id(dev);
 	unsigned int reg;

 	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

 	reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 	reg |= SMPS_CTRL_MODE_ON;

 	palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);

 	return 0;
 }

 static int palmas_disable_smps(struct regulator_dev *dev)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 	int id = rdev_get_id(dev);
 	unsigned int reg;

 	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

 	reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;

 	palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);

 	return 0;
 }


 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 	int id = rdev_get_id(dev);
 	unsigned int reg;

 	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 	reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;

 	switch (mode) {
 	case REGULATOR_MODE_NORMAL:
 		reg |= SMPS_CTRL_MODE_ON;
 		break;
 	case REGULATOR_MODE_IDLE:
 		reg |= SMPS_CTRL_MODE_ECO;
 		break;
 	case REGULATOR_MODE_FAST:
 		reg |= SMPS_CTRL_MODE_PWM;
 		break;
 	default:
 		return -EINVAL;
 	}
 	palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);

 	return 0;
 }

 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 	int id = rdev_get_id(dev);
 	unsigned int reg;

 	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 	reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
 	reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;

 	switch (reg) {
 	case SMPS_CTRL_MODE_ON:
 		return REGULATOR_MODE_NORMAL;
 	case SMPS_CTRL_MODE_ECO:
 		return REGULATOR_MODE_IDLE;
 	case SMPS_CTRL_MODE_PWM:
 		return REGULATOR_MODE_FAST;
 	}

 	return 0;
 }

 static int palmas_list_voltage_smps(struct regulator_dev *dev,
 					unsigned selector)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 	int id = rdev_get_id(dev);
 	int mult = 1;

 	/* Read the multiplier set in VSEL register to return
 	 * the correct voltage.
 	 */
 	if (pmic->range[id])
 		mult = 2;

 	if (selector == 0)
 		return 0;
 	else if (selector < 6)
 		return 500000 * mult;
 	else
 		/* Voltage is linear mapping starting from selector 6,
 		 * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
 		 * RANGE is either x1 or x2
 		 */
 		return (490000 + ((selector - 5) * 10000)) * mult;
 }

 static int palmas_map_voltage_smps(struct regulator_dev *rdev,
 		int min_uV, int max_uV)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	int ret, voltage;

 	if (min_uV == 0)
 		return 0;

 	if (pmic->range[id]) { /* RANGE is x2 */
 		if (min_uV < 1000000)
 			min_uV = 1000000;
 		ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
 	} else {		/* RANGE is x1 */
 		if (min_uV < 500000)
 			min_uV = 500000;
 		ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
 	}

 	/* Map back into a voltage to verify we're still in bounds */
 	voltage = palmas_list_voltage_smps(rdev, ret);
 	if (voltage < min_uV || voltage > max_uV)
 		return -EINVAL;

 	return ret;
 }

 static struct regulator_ops palmas_ops_smps = {
 	.is_enabled		= palmas_is_enabled_smps,
 	.enable			= palmas_enable_smps,
 	.disable		= palmas_disable_smps,
 	.set_mode		= palmas_set_mode_smps,
 	.get_mode		= palmas_get_mode_smps,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.list_voltage		= palmas_list_voltage_smps,
 	.map_voltage		= palmas_map_voltage_smps,
 };

 static struct regulator_ops palmas_ops_smps10 = {
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 };

 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
 {
 	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 	int id = rdev_get_id(dev);
 	unsigned int reg;

 	palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

 	reg &= PALMAS_LDO1_CTRL_STATUS;

 	return !!(reg);
 }

 static struct regulator_ops palmas_ops_ldo = {
 	.is_enabled		= palmas_is_enabled_ldo,
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 };

 /*
  * setup the hardware based sleep configuration of the SMPS/LDO regulators
  * from the platform data. This is different to the software based control
  * supported by the regulator framework as it is controlled by toggling
  * pins on the PMIC such as PREQ, SYSEN, ...
  */
 static int palmas_smps_init(struct palmas *palmas, int id,
 		struct palmas_reg_init *reg_init)
 {
 	unsigned int reg;
 	unsigned int addr;
 	int ret;

 	addr = palmas_regs_info[id].ctrl_addr;

 	ret = palmas_smps_read(palmas, addr, &reg);
 	if (ret)
 		return ret;

 	switch (id) {
 	case PALMAS_REG_SMPS10:
 		if (reg_init->mode_sleep) {
 			reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
 			reg |= reg_init->mode_sleep <<
 					PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
 		}
 		break;
 	default:
 		if (reg_init->warm_reset)
 			reg |= PALMAS_SMPS12_CTRL_WR_S;

 		if (reg_init->roof_floor)
 			reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;

 		if (reg_init->mode_sleep) {
 			reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
 			reg |= reg_init->mode_sleep <<
 					PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
 		}
 	}

 	ret = palmas_smps_write(palmas, addr, reg);
 	if (ret)
 		return ret;

 	if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
 		addr = palmas_regs_info[id].tstep_addr;

 		reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;

 		ret = palmas_smps_write(palmas, addr, reg);
 		if (ret)
 			return ret;
 	}

 	if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
 		addr = palmas_regs_info[id].vsel_addr;

 		reg = reg_init->vsel;

 		ret = palmas_smps_write(palmas, addr, reg);
 		if (ret)
 			return ret;
 	}


 	return 0;
 }

 static int palmas_ldo_init(struct palmas *palmas, int id,
 		struct palmas_reg_init *reg_init)
 {
 	unsigned int reg;
 	unsigned int addr;
 	int ret;

 	addr = palmas_regs_info[id].ctrl_addr;

 	ret = palmas_ldo_read(palmas, addr, &reg);
 	if (ret)
 		return ret;

 	if (reg_init->warm_reset)
 		reg |= PALMAS_LDO1_CTRL_WR_S;

 	if (reg_init->mode_sleep)
 		reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;

 	ret = palmas_ldo_write(palmas, addr, reg);
 	if (ret)
 		return ret;

 	return 0;
 }

 static struct of_regulator_match palmas_matches[] = {
 	{ .name = "smps12", },
 	{ .name = "smps123", },
 	{ .name = "smps3", },
 	{ .name = "smps45", },
 	{ .name = "smps457", },
 	{ .name = "smps6", },
 	{ .name = "smps7", },
 	{ .name = "smps8", },
 	{ .name = "smps9", },
 	{ .name = "smps10", },
 	{ .name = "ldo1", },
 	{ .name = "ldo2", },
 	{ .name = "ldo3", },
 	{ .name = "ldo4", },
 	{ .name = "ldo5", },
 	{ .name = "ldo6", },
 	{ .name = "ldo7", },
 	{ .name = "ldo8", },
 	{ .name = "ldo9", },
 	{ .name = "ldoln", },
 	{ .name = "ldousb", },
 };

 static void palmas_dt_to_pdata(struct device *dev,
 		struct device_node *node,
 		struct palmas_pmic_platform_data *pdata)
 {
 	struct device_node *regulators;
 	u32 prop;
 	int idx, ret;

 	node = of_node_get(node);
 	regulators = of_find_node_by_name(node, "regulators");
 	if (!regulators) {
 		dev_info(dev, "regulator node not found\n");
 		return;
 	}

 	ret = of_regulator_match(dev, regulators, palmas_matches,
 			PALMAS_NUM_REGS);
 	of_node_put(regulators);
 	if (ret < 0) {
 		dev_err(dev, "Error parsing regulator init data: %d\n", ret);
 		return;
 	}

 	for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
 		if (!palmas_matches[idx].init_data ||
 				!palmas_matches[idx].of_node)
 			continue;

 		pdata->reg_data[idx] = palmas_matches[idx].init_data;

 		pdata->reg_init[idx] = devm_kzalloc(dev,
 				sizeof(struct palmas_reg_init), GFP_KERNEL);

 		ret = of_property_read_u32(palmas_matches[idx].of_node,
 				"ti,warm_reset", &prop);
 		if (!ret)
 			pdata->reg_init[idx]->warm_reset = prop;

 		ret = of_property_read_u32(palmas_matches[idx].of_node,
 				"ti,roof_floor", &prop);
 		if (!ret)
 			pdata->reg_init[idx]->roof_floor = prop;

 		ret = of_property_read_u32(palmas_matches[idx].of_node,
 				"ti,mode_sleep", &prop);
 		if (!ret)
 			pdata->reg_init[idx]->mode_sleep = prop;

 		ret = of_property_read_u32(palmas_matches[idx].of_node,
 				"ti,tstep", &prop);
 		if (!ret)
 			pdata->reg_init[idx]->tstep = prop;

 		ret = of_property_read_u32(palmas_matches[idx].of_node,
 				"ti,vsel", &prop);
 		if (!ret)
 			pdata->reg_init[idx]->vsel = prop;
 	}

 	ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop);
 	if (!ret)
 		pdata->ldo6_vibrator = prop;
 }


 static int palmas_probe(struct platform_device *pdev)
 {
 	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
 	struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
 	struct device_node *node = pdev->dev.of_node;
 	struct regulator_dev *rdev;
 	struct regulator_config config = { };
 	struct palmas_pmic *pmic;
 	struct palmas_reg_init *reg_init;
 	int id = 0, ret;
 	unsigned int addr, reg;

 	if (node && !pdata) {
 		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);

 		if (!pdata)
 			return -ENOMEM;

 		palmas_dt_to_pdata(&pdev->dev, node, pdata);
 	}

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

 	pmic->dev = &pdev->dev;
 	pmic->palmas = palmas;
 	palmas->pmic = pmic;
 	platform_set_drvdata(pdev, pmic);

 	ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
 	if (ret)
 		return ret;

 	if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
 		pmic->smps123 = 1;

 	if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
 		pmic->smps457 = 1;

 	config.regmap = palmas->regmap[REGULATOR_SLAVE];
 	config.dev = &pdev->dev;
 	config.driver_data = pmic;

 	for (id = 0; id < PALMAS_REG_LDO1; id++) {

 		/*
 		 * Miss out regulators which are not available due
 		 * to slaving configurations.
 		 */
 		switch (id) {
 		case PALMAS_REG_SMPS12:
 		case PALMAS_REG_SMPS3:
 			if (pmic->smps123)
 				continue;
 			break;
 		case PALMAS_REG_SMPS123:
 			if (!pmic->smps123)
 				continue;
 			break;
 		case PALMAS_REG_SMPS45:
 		case PALMAS_REG_SMPS7:
 			if (pmic->smps457)
 				continue;
 			break;
 		case PALMAS_REG_SMPS457:
 			if (!pmic->smps457)
 				continue;
 		}

 		/* Initialise sleep/init values from platform data */
 		if (pdata && pdata->reg_init[id]) {
 			reg_init = pdata->reg_init[id];
 			ret = palmas_smps_init(palmas, id, reg_init);
 			if (ret)
 				goto err_unregister_regulator;
 		}

 		/* Register the regulators */
 		pmic->desc[id].name = palmas_regs_info[id].name;
 		pmic->desc[id].id = id;

 		switch (id) {
 		case PALMAS_REG_SMPS10:
 			pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
 			pmic->desc[id].ops = &palmas_ops_smps10;
 			pmic->desc[id].vsel_reg =
 					PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 							PALMAS_SMPS10_CTRL);
 			pmic->desc[id].vsel_mask = SMPS10_VSEL;
 			pmic->desc[id].enable_reg =
 					PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 							PALMAS_SMPS10_STATUS);
 			pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
 			pmic->desc[id].min_uV = 3750000;
 			pmic->desc[id].uV_step = 1250000;
 			break;
 		default:
 			/*
 			 * Read and store the RANGE bit for later use
 			 * This must be done before regulator is probed,
 			 * otherwise we error in probe with unsupportable ranges.
 			 */
 			addr = palmas_regs_info[id].vsel_addr;

 			ret = palmas_smps_read(pmic->palmas, addr, &reg);
 			if (ret)
 				goto err_unregister_regulator;
 			if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
 				pmic->range[id] = 1;

 			pmic->desc[id].ops = &palmas_ops_smps;
 			pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
 			pmic->desc[id].vsel_reg =
 					PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 						palmas_regs_info[id].vsel_addr);
 			pmic->desc[id].vsel_mask =
 					PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
 		}

 		pmic->desc[id].type = REGULATOR_VOLTAGE;
 		pmic->desc[id].owner = THIS_MODULE;

 		if (pdata)
 			config.init_data = pdata->reg_data[id];
 		else
 			config.init_data = NULL;

 		config.of_node = palmas_matches[id].of_node;

 		rdev = regulator_register(&pmic->desc[id], &config);
 		if (IS_ERR(rdev)) {
 			dev_err(&pdev->dev,
 				"failed to register %s regulator\n",
 				pdev->name);
 			ret = PTR_ERR(rdev);
 			goto err_unregister_regulator;
 		}

 		/* Save regulator for cleanup */
 		pmic->rdev[id] = rdev;
 	}

 	/* Start this loop from the id left from previous loop */
 	for (; id < PALMAS_NUM_REGS; id++) {

 		/* Miss out regulators which are not available due
 		 * to alternate functions.
 		 */

 		/* Register the regulators */
 		pmic->desc[id].name = palmas_regs_info[id].name;
 		pmic->desc[id].id = id;
 		pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;

 		pmic->desc[id].ops = &palmas_ops_ldo;

 		pmic->desc[id].type = REGULATOR_VOLTAGE;
 		pmic->desc[id].owner = THIS_MODULE;
 		pmic->desc[id].min_uV = 900000;
 		pmic->desc[id].uV_step = 50000;
 		pmic->desc[id].linear_min_sel = 1;
 		pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 						palmas_regs_info[id].vsel_addr);
 		pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
 		pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 						palmas_regs_info[id].ctrl_addr);
 		pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;

 		if (pdata)
 			config.init_data = pdata->reg_data[id];
 		else
 			config.init_data = NULL;

 		config.of_node = palmas_matches[id].of_node;

 		rdev = regulator_register(&pmic->desc[id], &config);
 		if (IS_ERR(rdev)) {
 			dev_err(&pdev->dev,
 				"failed to register %s regulator\n",
 				pdev->name);
 			ret = PTR_ERR(rdev);
 			goto err_unregister_regulator;
 		}

 		/* Save regulator for cleanup */
 		pmic->rdev[id] = rdev;

 		/* Initialise sleep/init values from platform data */
 		if (pdata) {
 			reg_init = pdata->reg_init[id];
 			if (reg_init) {
 				ret = palmas_ldo_init(palmas, id, reg_init);
 				if (ret) {
 					regulator_unregister(pmic->rdev[id]);
 					goto err_unregister_regulator;
 				}
 			}
 		}
 	}

 	return 0;

 err_unregister_regulator:
 	while (--id >= 0)
 		regulator_unregister(pmic->rdev[id]);
 	return ret;
 }

 static int palmas_remove(struct platform_device *pdev)
 {
 	struct palmas_pmic *pmic = platform_get_drvdata(pdev);
 	int id;

 	for (id = 0; id < PALMAS_NUM_REGS; id++)
 		regulator_unregister(pmic->rdev[id]);
 	return 0;
 }

 static struct of_device_id of_palmas_match_tbl[] = {
 	{ .compatible = "ti,palmas-pmic", },
 	{ /* end */ }
 };

 static struct platform_driver palmas_driver = {
 	.driver = {
 		.name = "palmas-pmic",
 		.of_match_table = of_palmas_match_tbl,
 		.owner = THIS_MODULE,
 	},
 	.probe = palmas_probe,
 	.remove = palmas_remove,
 };

 static int __init palmas_init(void)
 {
 	return platform_driver_register(&palmas_driver);
 }
 subsys_initcall(palmas_init);

 static void __exit palmas_exit(void)
 {
 	platform_driver_unregister(&palmas_driver);
 }
 module_exit(palmas_exit);

 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 MODULE_DESCRIPTION("Palmas voltage regulator driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:palmas-pmic");
 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
	/*
	* Driver for Regulator part of Palmas PMIC Chips
	*
	* Copyright 2011-2012 Texas Instruments Inc.
	*
	* Author: Graeme Gregory <gg@slimlogic.co.uk>
	* Author: Ian Lartey <ian@slimlogic.co.uk>
	*
	* 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; either version 2 of the License, or (at your
	* option) any later version.
	*
	*/

	#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/slab.h>
	#include <linux/regmap.h>
	#include <linux/mfd/palmas.h>
	#include <linux/of.h>
	#include <linux/of_platform.h>
	#include <linux/regulator/of_regulator.h>

	struct regs_info {
	char *name;
	u8 vsel_addr;
	u8 ctrl_addr;
	u8 tstep_addr;
	};

	static const struct regs_info palmas_regs_info[] = {
	{
	.name = "SMPS12",
	.vsel_addr = PALMAS_SMPS12_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS12_CTRL,
	.tstep_addr = PALMAS_SMPS12_TSTEP,
	},
	{
	.name = "SMPS123",
	.vsel_addr = PALMAS_SMPS12_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS12_CTRL,
	.tstep_addr = PALMAS_SMPS12_TSTEP,
	},
	{
	.name = "SMPS3",
	.vsel_addr = PALMAS_SMPS3_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS3_CTRL,
	},
	{
	.name = "SMPS45",
	.vsel_addr = PALMAS_SMPS45_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS45_CTRL,
	.tstep_addr = PALMAS_SMPS45_TSTEP,
	},
	{
	.name = "SMPS457",
	.vsel_addr = PALMAS_SMPS45_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS45_CTRL,
	.tstep_addr = PALMAS_SMPS45_TSTEP,
	},
	{
	.name = "SMPS6",
	.vsel_addr = PALMAS_SMPS6_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS6_CTRL,
	.tstep_addr = PALMAS_SMPS6_TSTEP,
	},
	{
	.name = "SMPS7",
	.vsel_addr = PALMAS_SMPS7_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS7_CTRL,
	},
	{
	.name = "SMPS8",
	.vsel_addr = PALMAS_SMPS8_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS8_CTRL,
	.tstep_addr = PALMAS_SMPS8_TSTEP,
	},
	{
	.name = "SMPS9",
	.vsel_addr = PALMAS_SMPS9_VOLTAGE,
	.ctrl_addr = PALMAS_SMPS9_CTRL,
	},
	{
	.name = "SMPS10",
	},
	{
	.name = "LDO1",
	.vsel_addr = PALMAS_LDO1_VOLTAGE,
	.ctrl_addr = PALMAS_LDO1_CTRL,
	},
	{
	.name = "LDO2",
	.vsel_addr = PALMAS_LDO2_VOLTAGE,
	.ctrl_addr = PALMAS_LDO2_CTRL,
	},
	{
	.name = "LDO3",
	.vsel_addr = PALMAS_LDO3_VOLTAGE,
	.ctrl_addr = PALMAS_LDO3_CTRL,
	},
	{
	.name = "LDO4",
	.vsel_addr = PALMAS_LDO4_VOLTAGE,
	.ctrl_addr = PALMAS_LDO4_CTRL,
	},
	{
	.name = "LDO5",
	.vsel_addr = PALMAS_LDO5_VOLTAGE,
	.ctrl_addr = PALMAS_LDO5_CTRL,
	},
	{
	.name = "LDO6",
	.vsel_addr = PALMAS_LDO6_VOLTAGE,
	.ctrl_addr = PALMAS_LDO6_CTRL,
	},
	{
	.name = "LDO7",
	.vsel_addr = PALMAS_LDO7_VOLTAGE,
	.ctrl_addr = PALMAS_LDO7_CTRL,
	},
	{
	.name = "LDO8",
	.vsel_addr = PALMAS_LDO8_VOLTAGE,
	.ctrl_addr = PALMAS_LDO8_CTRL,
	},
	{
	.name = "LDO9",
	.vsel_addr = PALMAS_LDO9_VOLTAGE,
	.ctrl_addr = PALMAS_LDO9_CTRL,
	},
	{
	.name = "LDOLN",
	.vsel_addr = PALMAS_LDOLN_VOLTAGE,
	.ctrl_addr = PALMAS_LDOLN_CTRL,
	},
	{
	.name = "LDOUSB",
	.vsel_addr = PALMAS_LDOUSB_VOLTAGE,
	.ctrl_addr = PALMAS_LDOUSB_CTRL,
	},
	};

	#define SMPS_CTRL_MODE_OFF 0x00
	#define SMPS_CTRL_MODE_ON 0x01
	#define SMPS_CTRL_MODE_ECO 0x02
	#define SMPS_CTRL_MODE_PWM 0x03

	/* These values are derived from the data sheet. And are the number of steps
	* where there is a voltage change, the ranges at beginning and end of register
	* max/min values where there are no change are ommitted.
	*
	* So they are basically (maxV-minV)/stepV
	*/
	#define PALMAS_SMPS_NUM_VOLTAGES 117
	#define PALMAS_SMPS10_NUM_VOLTAGES 2
	#define PALMAS_LDO_NUM_VOLTAGES 50

	#define SMPS10_VSEL (1<<3)
	#define SMPS10_BOOST_EN (1<<2)
	#define SMPS10_BYPASS_EN (1<<1)
	#define SMPS10_SWITCH_EN (1<<0)

	#define REGULATOR_SLAVE 0

	static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
	unsigned int *dest)
	{
	unsigned int addr;

	addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);

	return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
	}

	static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
	unsigned int value)
	{
	unsigned int addr;

	addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);

	return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
	}

	static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
	unsigned int *dest)
	{
	unsigned int addr;

	addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);

	return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
	}

	static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
	unsigned int value)
	{
	unsigned int addr;

	addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);

	return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
	}

	static int palmas_is_enabled_smps(struct regulator_dev *dev)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
	int id = rdev_get_id(dev);
	unsigned int reg;

	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

	reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
	reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;

	return !!(reg);
	}

	static int palmas_enable_smps(struct regulator_dev *dev)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
	int id = rdev_get_id(dev);
	unsigned int reg;

	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

	reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
	reg \|= SMPS_CTRL_MODE_ON;

	palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);

	return 0;
	}

	static int palmas_disable_smps(struct regulator_dev *dev)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
	int id = rdev_get_id(dev);
	unsigned int reg;

	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

	reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;

	palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);

	return 0;
	}


	static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
	int id = rdev_get_id(dev);
	unsigned int reg;

	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
	reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
	reg \|= SMPS_CTRL_MODE_ON;
	break;
	case REGULATOR_MODE_IDLE:
	reg \|= SMPS_CTRL_MODE_ECO;
	break;
	case REGULATOR_MODE_FAST:
	reg \|= SMPS_CTRL_MODE_PWM;
	break;
	default:
	return -EINVAL;
	}
	palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);

	return 0;
	}

	static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
	int id = rdev_get_id(dev);
	unsigned int reg;

	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
	reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
	reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;

	switch (reg) {
	case SMPS_CTRL_MODE_ON:
	return REGULATOR_MODE_NORMAL;
	case SMPS_CTRL_MODE_ECO:
	return REGULATOR_MODE_IDLE;
	case SMPS_CTRL_MODE_PWM:
	return REGULATOR_MODE_FAST;
	}

	return 0;
	}

	static int palmas_list_voltage_smps(struct regulator_dev *dev,
	unsigned selector)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
	int id = rdev_get_id(dev);
	int mult = 1;

	/* Read the multiplier set in VSEL register to return
	* the correct voltage.
	*/
	if (pmic->range[id])
	mult = 2;

	if (selector == 0)
	return 0;
	else if (selector < 6)
	return 500000 * mult;
	else
	/* Voltage is linear mapping starting from selector 6,
	* volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
	* RANGE is either x1 or x2
	*/
	return (490000 + ((selector - 5) * 10000)) * mult;
	}

	static int palmas_map_voltage_smps(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret, voltage;

	if (min_uV == 0)
	return 0;

	if (pmic->range[id]) { /* RANGE is x2 */
	if (min_uV < 1000000)
	min_uV = 1000000;
	ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
	} else { /* RANGE is x1 */
	if (min_uV < 500000)
	min_uV = 500000;
	ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
	}

	/* Map back into a voltage to verify we're still in bounds */
	voltage = palmas_list_voltage_smps(rdev, ret);
	if (voltage < min_uV \|\| voltage > max_uV)
	return -EINVAL;

	return ret;
	}

	static struct regulator_ops palmas_ops_smps = {
	.is_enabled = palmas_is_enabled_smps,
	.enable = palmas_enable_smps,
	.disable = palmas_disable_smps,
	.set_mode = palmas_set_mode_smps,
	.get_mode = palmas_get_mode_smps,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.list_voltage = palmas_list_voltage_smps,
	.map_voltage = palmas_map_voltage_smps,
	};

	static struct regulator_ops palmas_ops_smps10 = {
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	};

	static int palmas_is_enabled_ldo(struct regulator_dev *dev)
	{
	struct palmas_pmic *pmic = rdev_get_drvdata(dev);
	int id = rdev_get_id(dev);
	unsigned int reg;

	palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);

	reg &= PALMAS_LDO1_CTRL_STATUS;

	return !!(reg);
	}

	static struct regulator_ops palmas_ops_ldo = {
	.is_enabled = palmas_is_enabled_ldo,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	};

	/*
	* setup the hardware based sleep configuration of the SMPS/LDO regulators
	* from the platform data. This is different to the software based control
	* supported by the regulator framework as it is controlled by toggling
	* pins on the PMIC such as PREQ, SYSEN, ...
	*/
	static int palmas_smps_init(struct palmas *palmas, int id,
	struct palmas_reg_init *reg_init)
	{
	unsigned int reg;
	unsigned int addr;
	int ret;

	addr = palmas_regs_info[id].ctrl_addr;

	ret = palmas_smps_read(palmas, addr, &reg);
	if (ret)
	return ret;

	switch (id) {
	case PALMAS_REG_SMPS10:
	if (reg_init->mode_sleep) {
	reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
	reg \|= reg_init->mode_sleep <<
	PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
	}
	break;
	default:
	if (reg_init->warm_reset)
	reg \|= PALMAS_SMPS12_CTRL_WR_S;

	if (reg_init->roof_floor)
	reg \|= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;

	if (reg_init->mode_sleep) {
	reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
	reg \|= reg_init->mode_sleep <<
	PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
	}
	}

	ret = palmas_smps_write(palmas, addr, reg);
	if (ret)
	return ret;

	if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
	addr = palmas_regs_info[id].tstep_addr;

	reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;

	ret = palmas_smps_write(palmas, addr, reg);
	if (ret)
	return ret;
	}

	if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
	addr = palmas_regs_info[id].vsel_addr;

	reg = reg_init->vsel;

	ret = palmas_smps_write(palmas, addr, reg);
	if (ret)
	return ret;
	}


	return 0;
	}

	static int palmas_ldo_init(struct palmas *palmas, int id,
	struct palmas_reg_init *reg_init)
	{
	unsigned int reg;
	unsigned int addr;
	int ret;

	addr = palmas_regs_info[id].ctrl_addr;

	ret = palmas_ldo_read(palmas, addr, &reg);
	if (ret)
	return ret;

	if (reg_init->warm_reset)
	reg \|= PALMAS_LDO1_CTRL_WR_S;

	if (reg_init->mode_sleep)
	reg \|= PALMAS_LDO1_CTRL_MODE_SLEEP;

	ret = palmas_ldo_write(palmas, addr, reg);
	if (ret)
	return ret;

	return 0;
	}

	static struct of_regulator_match palmas_matches[] = {
	{ .name = "smps12", },
	{ .name = "smps123", },
	{ .name = "smps3", },
	{ .name = "smps45", },
	{ .name = "smps457", },
	{ .name = "smps6", },
	{ .name = "smps7", },
	{ .name = "smps8", },
	{ .name = "smps9", },
	{ .name = "smps10", },
	{ .name = "ldo1", },
	{ .name = "ldo2", },
	{ .name = "ldo3", },
	{ .name = "ldo4", },
	{ .name = "ldo5", },
	{ .name = "ldo6", },
	{ .name = "ldo7", },
	{ .name = "ldo8", },
	{ .name = "ldo9", },
	{ .name = "ldoln", },
	{ .name = "ldousb", },
	};

	static void palmas_dt_to_pdata(struct device *dev,
	struct device_node *node,
	struct palmas_pmic_platform_data *pdata)
	{
	struct device_node *regulators;
	u32 prop;
	int idx, ret;

	node = of_node_get(node);
	regulators = of_find_node_by_name(node, "regulators");
	if (!regulators) {
	dev_info(dev, "regulator node not found\n");
	return;
	}

	ret = of_regulator_match(dev, regulators, palmas_matches,
	PALMAS_NUM_REGS);
	of_node_put(regulators);
	if (ret < 0) {
	dev_err(dev, "Error parsing regulator init data: %d\n", ret);
	return;
	}

	for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
	if (!palmas_matches[idx].init_data \|\|
	!palmas_matches[idx].of_node)
	continue;

	pdata->reg_data[idx] = palmas_matches[idx].init_data;

	pdata->reg_init[idx] = devm_kzalloc(dev,
	sizeof(struct palmas_reg_init), GFP_KERNEL);

	ret = of_property_read_u32(palmas_matches[idx].of_node,
	"ti,warm_reset", &prop);
	if (!ret)
	pdata->reg_init[idx]->warm_reset = prop;

	ret = of_property_read_u32(palmas_matches[idx].of_node,
	"ti,roof_floor", &prop);
	if (!ret)
	pdata->reg_init[idx]->roof_floor = prop;

	ret = of_property_read_u32(palmas_matches[idx].of_node,
	"ti,mode_sleep", &prop);
	if (!ret)
	pdata->reg_init[idx]->mode_sleep = prop;

	ret = of_property_read_u32(palmas_matches[idx].of_node,
	"ti,tstep", &prop);
	if (!ret)
	pdata->reg_init[idx]->tstep = prop;

	ret = of_property_read_u32(palmas_matches[idx].of_node,
	"ti,vsel", &prop);
	if (!ret)
	pdata->reg_init[idx]->vsel = prop;
	}

	ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop);
	if (!ret)
	pdata->ldo6_vibrator = prop;
	}


	static int palmas_probe(struct platform_device *pdev)
	{
	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
	struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
	struct device_node *node = pdev->dev.of_node;
	struct regulator_dev *rdev;
	struct regulator_config config = { };
	struct palmas_pmic *pmic;
	struct palmas_reg_init *reg_init;
	int id = 0, ret;
	unsigned int addr, reg;

	if (node && !pdata) {
	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata)
	return -ENOMEM;

	palmas_dt_to_pdata(&pdev->dev, node, pdata);
	}

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

	pmic->dev = &pdev->dev;
	pmic->palmas = palmas;
	palmas->pmic = pmic;
	platform_set_drvdata(pdev, pmic);

	ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
	if (ret)
	return ret;

	if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
	pmic->smps123 = 1;

	if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
	pmic->smps457 = 1;

	config.regmap = palmas->regmap[REGULATOR_SLAVE];
	config.dev = &pdev->dev;
	config.driver_data = pmic;

	for (id = 0; id < PALMAS_REG_LDO1; id++) {

	/*
	* Miss out regulators which are not available due
	* to slaving configurations.
	*/
	switch (id) {
	case PALMAS_REG_SMPS12:
	case PALMAS_REG_SMPS3:
	if (pmic->smps123)
	continue;
	break;
	case PALMAS_REG_SMPS123:
	if (!pmic->smps123)
	continue;
	break;
	case PALMAS_REG_SMPS45:
	case PALMAS_REG_SMPS7:
	if (pmic->smps457)
	continue;
	break;
	case PALMAS_REG_SMPS457:
	if (!pmic->smps457)
	continue;
	}

	/* Initialise sleep/init values from platform data */
	if (pdata && pdata->reg_init[id]) {
	reg_init = pdata->reg_init[id];
	ret = palmas_smps_init(palmas, id, reg_init);
	if (ret)
	goto err_unregister_regulator;
	}

	/* Register the regulators */
	pmic->desc[id].name = palmas_regs_info[id].name;
	pmic->desc[id].id = id;

	switch (id) {
	case PALMAS_REG_SMPS10:
	pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
	pmic->desc[id].ops = &palmas_ops_smps10;
	pmic->desc[id].vsel_reg =
	PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
	PALMAS_SMPS10_CTRL);
	pmic->desc[id].vsel_mask = SMPS10_VSEL;
	pmic->desc[id].enable_reg =
	PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
	PALMAS_SMPS10_STATUS);
	pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
	pmic->desc[id].min_uV = 3750000;
	pmic->desc[id].uV_step = 1250000;
	break;
	default:
	/*
	* Read and store the RANGE bit for later use
	* This must be done before regulator is probed,
	* otherwise we error in probe with unsupportable ranges.
	*/
	addr = palmas_regs_info[id].vsel_addr;

	ret = palmas_smps_read(pmic->palmas, addr, &reg);
	if (ret)
	goto err_unregister_regulator;
	if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
	pmic->range[id] = 1;

	pmic->desc[id].ops = &palmas_ops_smps;
	pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
	pmic->desc[id].vsel_reg =
	PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
	palmas_regs_info[id].vsel_addr);
	pmic->desc[id].vsel_mask =
	PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
	}

	pmic->desc[id].type = REGULATOR_VOLTAGE;
	pmic->desc[id].owner = THIS_MODULE;

	if (pdata)
	config.init_data = pdata->reg_data[id];
	else
	config.init_data = NULL;

	config.of_node = palmas_matches[id].of_node;

	rdev = regulator_register(&pmic->desc[id], &config);
	if (IS_ERR(rdev)) {
	dev_err(&pdev->dev,
	"failed to register %s regulator\n",
	pdev->name);
	ret = PTR_ERR(rdev);
	goto err_unregister_regulator;
	}

	/* Save regulator for cleanup */
	pmic->rdev[id] = rdev;
	}

	/* Start this loop from the id left from previous loop */
	for (; id < PALMAS_NUM_REGS; id++) {

	/* Miss out regulators which are not available due
	* to alternate functions.
	*/

	/* Register the regulators */
	pmic->desc[id].name = palmas_regs_info[id].name;
	pmic->desc[id].id = id;
	pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;

	pmic->desc[id].ops = &palmas_ops_ldo;

	pmic->desc[id].type = REGULATOR_VOLTAGE;
	pmic->desc[id].owner = THIS_MODULE;
	pmic->desc[id].min_uV = 900000;
	pmic->desc[id].uV_step = 50000;
	pmic->desc[id].linear_min_sel = 1;
	pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
	palmas_regs_info[id].vsel_addr);
	pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
	pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
	palmas_regs_info[id].ctrl_addr);
	pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;

	if (pdata)
	config.init_data = pdata->reg_data[id];
	else
	config.init_data = NULL;

	config.of_node = palmas_matches[id].of_node;

	rdev = regulator_register(&pmic->desc[id], &config);
	if (IS_ERR(rdev)) {
	dev_err(&pdev->dev,
	"failed to register %s regulator\n",
	pdev->name);
	ret = PTR_ERR(rdev);
	goto err_unregister_regulator;
	}

	/* Save regulator for cleanup */
	pmic->rdev[id] = rdev;

	/* Initialise sleep/init values from platform data */
	if (pdata) {
	reg_init = pdata->reg_init[id];
	if (reg_init) {
	ret = palmas_ldo_init(palmas, id, reg_init);
	if (ret) {
	regulator_unregister(pmic->rdev[id]);
	goto err_unregister_regulator;
	}
	}
	}
	}

	return 0;

	err_unregister_regulator:
	while (--id >= 0)
	regulator_unregister(pmic->rdev[id]);
	return ret;
	}

	static int palmas_remove(struct platform_device *pdev)
	{
	struct palmas_pmic *pmic = platform_get_drvdata(pdev);
	int id;

	for (id = 0; id < PALMAS_NUM_REGS; id++)
	regulator_unregister(pmic->rdev[id]);
	return 0;
	}

	static struct of_device_id of_palmas_match_tbl[] = {
	{ .compatible = "ti,palmas-pmic", },
	{ /* end */ }
	};

	static struct platform_driver palmas_driver = {
	.driver = {
	.name = "palmas-pmic",
	.of_match_table = of_palmas_match_tbl,
	.owner = THIS_MODULE,
	},
	.probe = palmas_probe,
	.remove = palmas_remove,
	};

	static int __init palmas_init(void)
	{
	return platform_driver_register(&palmas_driver);
	}
	subsys_initcall(palmas_init);

	static void __exit palmas_exit(void)
	{
	platform_driver_unregister(&palmas_driver);
	}
	module_exit(palmas_exit);

	MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
	MODULE_DESCRIPTION("Palmas voltage regulator driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:palmas-pmic");
	MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);