drivers/regulator/tps65217-regulator.c - linux - Git at Google

 /*
  * tps65217-regulator.c
  *
  * Regulator driver for TPS65217 PMIC
  *
  * Copyright (C) 2011 Texas Instruments 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/device.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>

 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/mfd/tps65217.h>

 #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t) \
 	{						\
 		.name		= _name,		\
 		.id		= _id,			\
 		.ops		= &_ops,		\
 		.n_voltages	= _n,			\
 		.type		= REGULATOR_VOLTAGE,	\
 		.owner		= THIS_MODULE,		\
 		.vsel_reg	= _vr,			\
 		.vsel_mask	= _vm,			\
 		.enable_reg	= TPS65217_REG_ENABLE,	\
 		.enable_mask	= _em,			\
 		.volt_table	= _t,			\
 	}						\

 #define TPS65217_INFO(_nm, _min, _max, _f1, _f2)	\
 	{						\
 		.name		= _nm,			\
 		.min_uV		= _min,			\
 		.max_uV		= _max,			\
 		.vsel_to_uv	= _f1,			\
 		.uv_to_vsel	= _f2,			\
 	}

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

 static int tps65217_vsel_to_uv1(unsigned int vsel)
 {
 	int uV = 0;

 	if (vsel > 63)
 		return -EINVAL;

 	if (vsel <= 24)
 		uV = vsel * 25000 + 900000;
 	else if (vsel <= 52)
 		uV = (vsel - 24) * 50000 + 1500000;
 	else if (vsel < 56)
 		uV = (vsel - 52) * 100000 + 2900000;
 	else
 		uV = 3300000;

 	return uV;
 }

 static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel)
 {
 	if (uV < 0 || uV > 3300000)
 		return -EINVAL;

 	if (uV <= 1500000)
 		*vsel = DIV_ROUND_UP(uV - 900000, 25000);
 	else if (uV <= 2900000)
 		*vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000);
 	else if (uV < 3300000)
 		*vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000);
 	else
 		*vsel = 56;

 	return 0;
 }

 static int tps65217_vsel_to_uv2(unsigned int vsel)
 {
 	int uV = 0;

 	if (vsel > 31)
 		return -EINVAL;

 	if (vsel <= 8)
 		uV = vsel * 50000 + 1500000;
 	else if (vsel <= 13)
 		uV = (vsel - 8) * 100000 + 1900000;
 	else
 		uV = (vsel - 13) * 50000 + 2400000;

 	return uV;
 }

 static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel)
 {
 	if (uV < 0 || uV > 3300000)
 		return -EINVAL;

 	if (uV <= 1900000)
 		*vsel = DIV_ROUND_UP(uV - 1500000, 50000);
 	else if (uV <= 2400000)
 		*vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000);
 	else
 		*vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000);

 	return 0;
 }

 static struct tps_info tps65217_pmic_regs[] = {
 	TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1,
 			tps65217_uv_to_vsel1),
 	TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1,
 			tps65217_uv_to_vsel1),
 	TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1,
 			tps65217_uv_to_vsel1),
 	TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL),
 	TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1,
 			tps65217_uv_to_vsel1),
 	TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2,
 			tps65217_uv_to_vsel2),
 	TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2,
 			tps65217_uv_to_vsel2),
 };

 static int tps65217_pmic_enable(struct regulator_dev *dev)
 {
 	struct tps65217 *tps = rdev_get_drvdata(dev);
 	unsigned int rid = rdev_get_id(dev);

 	if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 		return -EINVAL;

 	/* Enable the regulator and password protection is level 1 */
 	return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
 				 dev->desc->enable_mask, dev->desc->enable_mask,
 				 TPS65217_PROTECT_L1);
 }

 static int tps65217_pmic_disable(struct regulator_dev *dev)
 {
 	struct tps65217 *tps = rdev_get_drvdata(dev);
 	unsigned int rid = rdev_get_id(dev);

 	if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 		return -EINVAL;

 	/* Disable the regulator and password protection is level 1 */
 	return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
 				   dev->desc->enable_mask, TPS65217_PROTECT_L1);
 }

 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
 					 unsigned selector)
 {
 	int ret;
 	struct tps65217 *tps = rdev_get_drvdata(dev);
 	unsigned int rid = rdev_get_id(dev);

 	/* Set the voltage based on vsel value and write protect level is 2 */
 	ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 				selector, TPS65217_PROTECT_L2);

 	/* Set GO bit for DCDCx to initiate voltage transistion */
 	switch (rid) {
 	case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
 		ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
 				       TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
 				       TPS65217_PROTECT_L2);
 		break;
 	}

 	return ret;
 }

 static int tps65217_pmic_map_voltage(struct regulator_dev *dev,
 				     int min_uV, int max_uV)
 {

 	struct tps65217 *tps = rdev_get_drvdata(dev);
 	unsigned int sel, rid = rdev_get_id(dev);
 	int ret;

 	/* LDO1 uses regulator_map_voltage_iterate() */
 	if (rid == TPS65217_LDO_1)
 		return -EINVAL;

 	if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 		return -EINVAL;

 	if (min_uV < tps->info[rid]->min_uV)
 		min_uV = tps->info[rid]->min_uV;

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

 	ret = tps->info[rid]->uv_to_vsel(min_uV, &sel);
 	if (ret)
 		return ret;

 	return sel;
 }

 static int tps65217_pmic_list_voltage(struct regulator_dev *dev,
 					unsigned selector)
 {
 	struct tps65217 *tps = rdev_get_drvdata(dev);
 	unsigned int rid = rdev_get_id(dev);

 	if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 		return -EINVAL;

 	if (selector >= dev->desc->n_voltages)
 		return -EINVAL;

 	return tps->info[rid]->vsel_to_uv(selector);
 }

 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 static struct regulator_ops tps65217_pmic_ops = {
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= tps65217_pmic_enable,
 	.disable		= tps65217_pmic_disable,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= tps65217_pmic_set_voltage_sel,
 	.list_voltage		= tps65217_pmic_list_voltage,
 	.map_voltage		= tps65217_pmic_map_voltage,
 };

 /* Operations permitted on LDO1 */
 static struct regulator_ops tps65217_pmic_ldo1_ops = {
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= tps65217_pmic_enable,
 	.disable		= tps65217_pmic_disable,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= tps65217_pmic_set_voltage_sel,
 	.list_voltage		= regulator_list_voltage_table,
 };

 static const struct regulator_desc regulators[] = {
 	TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
 			   TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
 			   TPS65217_ENABLE_DC1_EN, NULL),
 	TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
 			   TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
 			   TPS65217_ENABLE_DC2_EN, NULL),
 	TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
 			   TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
 			   TPS65217_ENABLE_DC3_EN, NULL),
 	TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
 			   TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
 			   TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table),
 	TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
 			   TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
 			   TPS65217_ENABLE_LDO2_EN, NULL),
 	TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
 			   TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
 			   TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
 			   NULL),
 	TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
 			   TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
 			   TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
 			   NULL),
 };

 #ifdef CONFIG_OF
 static struct of_regulator_match reg_matches[] = {
 	{ .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },
 	{ .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },
 	{ .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },
 	{ .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },
 	{ .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },
 	{ .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },
 	{ .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },
 };

 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
 {
 	struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *node = tps->dev->of_node;
 	struct tps65217_board *pdata;
 	struct device_node *regs;
 	int i, count;

 	regs = of_find_node_by_name(node, "regulators");
 	if (!regs)
 		return NULL;

 	count = of_regulator_match(pdev->dev.parent, regs,
 				reg_matches, TPS65217_NUM_REGULATOR);
 	of_node_put(regs);
 	if ((count < 0) || (count > TPS65217_NUM_REGULATOR))
 		return NULL;

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

 	for (i = 0; i < count; i++) {
 		if (!reg_matches[i].init_data || !reg_matches[i].of_node)
 			continue;

 		pdata->tps65217_init_data[i] = reg_matches[i].init_data;
 		pdata->of_node[i] = reg_matches[i].of_node;
 	}

 	return pdata;
 }
 #else
 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
 {
 	return NULL;
 }
 #endif

 static int __devinit tps65217_regulator_probe(struct platform_device *pdev)
 {
 	struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 	struct tps65217_board *pdata = dev_get_platdata(tps->dev);
 	struct regulator_init_data *reg_data;
 	struct regulator_dev *rdev;
 	struct regulator_config config = { };
 	int i, ret;

 	if (tps->dev->of_node)
 		pdata = tps65217_parse_dt(pdev);

 	if (!pdata) {
 		dev_err(&pdev->dev, "Platform data not found\n");
 		return -EINVAL;
 	}

 	if (tps65217_chip_id(tps) != TPS65217) {
 		dev_err(&pdev->dev, "Invalid tps chip version\n");
 		return -ENODEV;
 	}

 	platform_set_drvdata(pdev, tps);

 	for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {

 		reg_data = pdata->tps65217_init_data[i];

 		/*
 		 * Regulator API handles empty constraints but not NULL
 		 * constraints
 		 */
 		if (!reg_data)
 			continue;

 		/* Register the regulators */
 		tps->info[i] = &tps65217_pmic_regs[i];

 		config.dev = tps->dev;
 		config.init_data = reg_data;
 		config.driver_data = tps;
 		config.regmap = tps->regmap;
 		if (tps->dev->of_node)
 			config.of_node = pdata->of_node[i];

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

 		/* Save regulator for cleanup */
 		tps->rdev[i] = rdev;
 	}
 	return 0;

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

 	return ret;
 }

 static int __devexit tps65217_regulator_remove(struct platform_device *pdev)
 {
 	struct tps65217 *tps = platform_get_drvdata(pdev);
 	unsigned int i;

 	for (i = 0; i < TPS65217_NUM_REGULATOR; i++)
 		regulator_unregister(tps->rdev[i]);

 	platform_set_drvdata(pdev, NULL);

 	return 0;
 }

 static struct platform_driver tps65217_regulator_driver = {
 	.driver = {
 		.name = "tps65217-pmic",
 	},
 	.probe = tps65217_regulator_probe,
 	.remove = __devexit_p(tps65217_regulator_remove),
 };

 static int __init tps65217_regulator_init(void)
 {
 	return platform_driver_register(&tps65217_regulator_driver);
 }
 subsys_initcall(tps65217_regulator_init);

 static void __exit tps65217_regulator_exit(void)
 {
 	platform_driver_unregister(&tps65217_regulator_driver);
 }
 module_exit(tps65217_regulator_exit);

 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
 MODULE_ALIAS("platform:tps65217-pmic");
 MODULE_LICENSE("GPL v2");
	/*
	* tps65217-regulator.c
	*
	* Regulator driver for TPS65217 PMIC
	*
	* Copyright (C) 2011 Texas Instruments 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/device.h>
	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/platform_device.h>

	#include <linux/regulator/of_regulator.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/mfd/tps65217.h>

	#define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t) \
	{ \
	.name = _name, \
	.id = _id, \
	.ops = &_ops, \
	.n_voltages = _n, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.vsel_reg = _vr, \
	.vsel_mask = _vm, \
	.enable_reg = TPS65217_REG_ENABLE, \
	.enable_mask = _em, \
	.volt_table = _t, \
	} \

	#define TPS65217_INFO(_nm, _min, _max, _f1, _f2) \
	{ \
	.name = _nm, \
	.min_uV = _min, \
	.max_uV = _max, \
	.vsel_to_uv = _f1, \
	.uv_to_vsel = _f2, \
	}

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

	static int tps65217_vsel_to_uv1(unsigned int vsel)
	{
	int uV = 0;

	if (vsel > 63)
	return -EINVAL;

	if (vsel <= 24)
	uV = vsel * 25000 + 900000;
	else if (vsel <= 52)
	uV = (vsel - 24) * 50000 + 1500000;
	else if (vsel < 56)
	uV = (vsel - 52) * 100000 + 2900000;
	else
	uV = 3300000;

	return uV;
	}

	static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel)
	{
	if (uV < 0 \|\| uV > 3300000)
	return -EINVAL;

	if (uV <= 1500000)
	*vsel = DIV_ROUND_UP(uV - 900000, 25000);
	else if (uV <= 2900000)
	*vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000);
	else if (uV < 3300000)
	*vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000);
	else
	*vsel = 56;

	return 0;
	}

	static int tps65217_vsel_to_uv2(unsigned int vsel)
	{
	int uV = 0;

	if (vsel > 31)
	return -EINVAL;

	if (vsel <= 8)
	uV = vsel * 50000 + 1500000;
	else if (vsel <= 13)
	uV = (vsel - 8) * 100000 + 1900000;
	else
	uV = (vsel - 13) * 50000 + 2400000;

	return uV;
	}

	static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel)
	{
	if (uV < 0 \|\| uV > 3300000)
	return -EINVAL;

	if (uV <= 1900000)
	*vsel = DIV_ROUND_UP(uV - 1500000, 50000);
	else if (uV <= 2400000)
	*vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000);
	else
	*vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000);

	return 0;
	}

	static struct tps_info tps65217_pmic_regs[] = {
	TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1,
	tps65217_uv_to_vsel1),
	TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1,
	tps65217_uv_to_vsel1),
	TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1,
	tps65217_uv_to_vsel1),
	TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL),
	TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1,
	tps65217_uv_to_vsel1),
	TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2,
	tps65217_uv_to_vsel2),
	TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2,
	tps65217_uv_to_vsel2),
	};

	static int tps65217_pmic_enable(struct regulator_dev *dev)
	{
	struct tps65217 *tps = rdev_get_drvdata(dev);
	unsigned int rid = rdev_get_id(dev);

	if (rid < TPS65217_DCDC_1 \|\| rid > TPS65217_LDO_4)
	return -EINVAL;

	/* Enable the regulator and password protection is level 1 */
	return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
	dev->desc->enable_mask, dev->desc->enable_mask,
	TPS65217_PROTECT_L1);
	}

	static int tps65217_pmic_disable(struct regulator_dev *dev)
	{
	struct tps65217 *tps = rdev_get_drvdata(dev);
	unsigned int rid = rdev_get_id(dev);

	if (rid < TPS65217_DCDC_1 \|\| rid > TPS65217_LDO_4)
	return -EINVAL;

	/* Disable the regulator and password protection is level 1 */
	return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
	dev->desc->enable_mask, TPS65217_PROTECT_L1);
	}

	static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
	unsigned selector)
	{
	int ret;
	struct tps65217 *tps = rdev_get_drvdata(dev);
	unsigned int rid = rdev_get_id(dev);

	/* Set the voltage based on vsel value and write protect level is 2 */
	ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
	selector, TPS65217_PROTECT_L2);

	/* Set GO bit for DCDCx to initiate voltage transistion */
	switch (rid) {
	case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
	ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
	TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
	TPS65217_PROTECT_L2);
	break;
	}

	return ret;
	}

	static int tps65217_pmic_map_voltage(struct regulator_dev *dev,
	int min_uV, int max_uV)
	{

	struct tps65217 *tps = rdev_get_drvdata(dev);
	unsigned int sel, rid = rdev_get_id(dev);
	int ret;

	/* LDO1 uses regulator_map_voltage_iterate() */
	if (rid == TPS65217_LDO_1)
	return -EINVAL;

	if (rid < TPS65217_DCDC_1 \|\| rid > TPS65217_LDO_4)
	return -EINVAL;

	if (min_uV < tps->info[rid]->min_uV)
	min_uV = tps->info[rid]->min_uV;

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

	ret = tps->info[rid]->uv_to_vsel(min_uV, &sel);
	if (ret)
	return ret;

	return sel;
	}

	static int tps65217_pmic_list_voltage(struct regulator_dev *dev,
	unsigned selector)
	{
	struct tps65217 *tps = rdev_get_drvdata(dev);
	unsigned int rid = rdev_get_id(dev);

	if (rid < TPS65217_DCDC_1 \|\| rid > TPS65217_LDO_4)
	return -EINVAL;

	if (selector >= dev->desc->n_voltages)
	return -EINVAL;

	return tps->info[rid]->vsel_to_uv(selector);
	}

	/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
	static struct regulator_ops tps65217_pmic_ops = {
	.is_enabled = regulator_is_enabled_regmap,
	.enable = tps65217_pmic_enable,
	.disable = tps65217_pmic_disable,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = tps65217_pmic_set_voltage_sel,
	.list_voltage = tps65217_pmic_list_voltage,
	.map_voltage = tps65217_pmic_map_voltage,
	};

	/* Operations permitted on LDO1 */
	static struct regulator_ops tps65217_pmic_ldo1_ops = {
	.is_enabled = regulator_is_enabled_regmap,
	.enable = tps65217_pmic_enable,
	.disable = tps65217_pmic_disable,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = tps65217_pmic_set_voltage_sel,
	.list_voltage = regulator_list_voltage_table,
	};

	static const struct regulator_desc regulators[] = {
	TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
	TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
	TPS65217_ENABLE_DC1_EN, NULL),
	TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
	TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
	TPS65217_ENABLE_DC2_EN, NULL),
	TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
	TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
	TPS65217_ENABLE_DC3_EN, NULL),
	TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
	TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
	TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table),
	TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
	TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
	TPS65217_ENABLE_LDO2_EN, NULL),
	TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
	TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
	TPS65217_ENABLE_LS1_EN \| TPS65217_DEFLDO3_LDO3_EN,
	NULL),
	TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
	TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
	TPS65217_ENABLE_LS2_EN \| TPS65217_DEFLDO4_LDO4_EN,
	NULL),
	};

	#ifdef CONFIG_OF
	static struct of_regulator_match reg_matches[] = {
	{ .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },
	{ .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },
	{ .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },
	{ .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },
	{ .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },
	{ .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },
	{ .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },
	};

	static struct tps65217_board tps65217_parse_dt(struct platform_device pdev)
	{
	struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
	struct device_node *node = tps->dev->of_node;
	struct tps65217_board *pdata;
	struct device_node *regs;
	int i, count;

	regs = of_find_node_by_name(node, "regulators");
	if (!regs)
	return NULL;

	count = of_regulator_match(pdev->dev.parent, regs,
	reg_matches, TPS65217_NUM_REGULATOR);
	of_node_put(regs);
	if ((count < 0) \|\| (count > TPS65217_NUM_REGULATOR))
	return NULL;

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

	for (i = 0; i < count; i++) {
	if (!reg_matches[i].init_data \|\| !reg_matches[i].of_node)
	continue;

	pdata->tps65217_init_data[i] = reg_matches[i].init_data;
	pdata->of_node[i] = reg_matches[i].of_node;
	}

	return pdata;
	}
	#else
	static struct tps65217_board tps65217_parse_dt(struct platform_device pdev)
	{
	return NULL;
	}
	#endif

	static int __devinit tps65217_regulator_probe(struct platform_device *pdev)
	{
	struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
	struct tps65217_board *pdata = dev_get_platdata(tps->dev);
	struct regulator_init_data *reg_data;
	struct regulator_dev *rdev;
	struct regulator_config config = { };
	int i, ret;

	if (tps->dev->of_node)
	pdata = tps65217_parse_dt(pdev);

	if (!pdata) {
	dev_err(&pdev->dev, "Platform data not found\n");
	return -EINVAL;
	}

	if (tps65217_chip_id(tps) != TPS65217) {
	dev_err(&pdev->dev, "Invalid tps chip version\n");
	return -ENODEV;
	}

	platform_set_drvdata(pdev, tps);

	for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {

	reg_data = pdata->tps65217_init_data[i];

	/*
	* Regulator API handles empty constraints but not NULL
	* constraints
	*/
	if (!reg_data)
	continue;

	/* Register the regulators */
	tps->info[i] = &tps65217_pmic_regs[i];

	config.dev = tps->dev;
	config.init_data = reg_data;
	config.driver_data = tps;
	config.regmap = tps->regmap;
	if (tps->dev->of_node)
	config.of_node = pdata->of_node[i];

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

	/* Save regulator for cleanup */
	tps->rdev[i] = rdev;
	}
	return 0;

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

	return ret;
	}

	static int __devexit tps65217_regulator_remove(struct platform_device *pdev)
	{
	struct tps65217 *tps = platform_get_drvdata(pdev);
	unsigned int i;

	for (i = 0; i < TPS65217_NUM_REGULATOR; i++)
	regulator_unregister(tps->rdev[i]);

	platform_set_drvdata(pdev, NULL);

	return 0;
	}

	static struct platform_driver tps65217_regulator_driver = {
	.driver = {
	.name = "tps65217-pmic",
	},
	.probe = tps65217_regulator_probe,
	.remove = __devexit_p(tps65217_regulator_remove),
	};

	static int __init tps65217_regulator_init(void)
	{
	return platform_driver_register(&tps65217_regulator_driver);
	}
	subsys_initcall(tps65217_regulator_init);

	static void __exit tps65217_regulator_exit(void)
	{
	platform_driver_unregister(&tps65217_regulator_driver);
	}
	module_exit(tps65217_regulator_exit);

	MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
	MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
	MODULE_ALIAS("platform:tps65217-pmic");
	MODULE_LICENSE("GPL v2");