drivers/regulator/pfuze100-regulator.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
  *
  * 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.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/pfuze100.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/regmap.h>

 #define PFUZE_NUMREGS		128
 #define PFUZE100_VOL_OFFSET	0
 #define PFUZE100_STANDBY_OFFSET	1
 #define PFUZE100_MODE_OFFSET	3
 #define PFUZE100_CONF_OFFSET	4

 #define PFUZE100_DEVICEID	0x0
 #define PFUZE100_REVID		0x3
 #define PFUZE100_FABID		0x4

 #define PFUZE100_SW1ABVOL	0x20
 #define PFUZE100_SW1CVOL	0x2e
 #define PFUZE100_SW2VOL		0x35
 #define PFUZE100_SW3AVOL	0x3c
 #define PFUZE100_SW3BVOL	0x43
 #define PFUZE100_SW4VOL		0x4a
 #define PFUZE100_SWBSTCON1	0x66
 #define PFUZE100_VREFDDRCON	0x6a
 #define PFUZE100_VSNVSVOL	0x6b
 #define PFUZE100_VGEN1VOL	0x6c
 #define PFUZE100_VGEN2VOL	0x6d
 #define PFUZE100_VGEN3VOL	0x6e
 #define PFUZE100_VGEN4VOL	0x6f
 #define PFUZE100_VGEN5VOL	0x70
 #define PFUZE100_VGEN6VOL	0x71

 enum chips { PFUZE100, PFUZE200, PFUZE3000 = 3 };

 struct pfuze_regulator {
 	struct regulator_desc desc;
 	unsigned char stby_reg;
 	unsigned char stby_mask;
 };

 struct pfuze_chip {
 	int	chip_id;
 	struct regmap *regmap;
 	struct device *dev;
 	struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
 	struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
 	struct pfuze_regulator *pfuze_regulators;
 };

 static const int pfuze100_swbst[] = {
 	5000000, 5050000, 5100000, 5150000,
 };

 static const int pfuze100_vsnvs[] = {
 	1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
 };

 static const int pfuze3000_sw2lo[] = {
 	1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000,
 };

 static const int pfuze3000_sw2hi[] = {
 	2500000, 2800000, 2850000, 3000000, 3100000, 3150000, 3200000, 3300000,
 };

 static const struct i2c_device_id pfuze_device_id[] = {
 	{.name = "pfuze100", .driver_data = PFUZE100},
 	{.name = "pfuze200", .driver_data = PFUZE200},
 	{.name = "pfuze3000", .driver_data = PFUZE3000},
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, pfuze_device_id);

 static const struct of_device_id pfuze_dt_ids[] = {
 	{ .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
 	{ .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
 	{ .compatible = "fsl,pfuze3000", .data = (void *)PFUZE3000},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);

 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 {
 	struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	unsigned int ramp_bits;
 	int ret;

 	if (id < PFUZE100_SWBST) {
 		ramp_delay = 12500 / ramp_delay;
 		ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
 		ret = regmap_update_bits(pfuze100->regmap,
 					 rdev->desc->vsel_reg + 4,
 					 0xc0, ramp_bits << 6);
 		if (ret < 0)
 			dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
 	} else
 		ret = -EACCES;

 	return ret;
 }

 static const struct regulator_ops pfuze100_ldo_regulator_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_linear,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 };

 static const struct regulator_ops pfuze100_fixed_regulator_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_linear,
 };

 static const struct regulator_ops pfuze100_sw_regulator_ops = {
 	.list_voltage = regulator_list_voltage_linear,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 	.set_ramp_delay = pfuze100_set_ramp_delay,
 };

 static const struct regulator_ops pfuze100_swb_regulator_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.list_voltage = regulator_list_voltage_table,
 	.map_voltage = regulator_map_voltage_ascend,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,

 };

 #define PFUZE100_FIXED_REG(_chip, _name, base, voltage)	\
 	[_chip ## _ ## _name] = {	\
 		.desc = {	\
 			.name = #_name,	\
 			.n_voltages = 1,	\
 			.ops = &pfuze100_fixed_regulator_ops,	\
 			.type = REGULATOR_VOLTAGE,	\
 			.id = _chip ## _ ## _name,	\
 			.owner = THIS_MODULE,	\
 			.min_uV = (voltage),	\
 			.enable_reg = (base),	\
 			.enable_mask = 0x10,	\
 		},	\
 	}

 #define PFUZE100_SW_REG(_chip, _name, base, min, max, step)	\
 	[_chip ## _ ## _name] = {	\
 		.desc = {	\
 			.name = #_name,\
 			.n_voltages = ((max) - (min)) / (step) + 1,	\
 			.ops = &pfuze100_sw_regulator_ops,	\
 			.type = REGULATOR_VOLTAGE,	\
 			.id = _chip ## _ ## _name,	\
 			.owner = THIS_MODULE,	\
 			.min_uV = (min),	\
 			.uV_step = (step),	\
 			.vsel_reg = (base) + PFUZE100_VOL_OFFSET,	\
 			.vsel_mask = 0x3f,	\
 		},	\
 		.stby_reg = (base) + PFUZE100_STANDBY_OFFSET,	\
 		.stby_mask = 0x3f,	\
 	}

 #define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages)	\
 	[_chip ## _ ##  _name] = {	\
 		.desc = {	\
 			.name = #_name,	\
 			.n_voltages = ARRAY_SIZE(voltages),	\
 			.ops = &pfuze100_swb_regulator_ops,	\
 			.type = REGULATOR_VOLTAGE,	\
 			.id = _chip ## _ ## _name,	\
 			.owner = THIS_MODULE,	\
 			.volt_table = voltages,	\
 			.vsel_reg = (base),	\
 			.vsel_mask = (mask),	\
 			.enable_reg = (base),	\
 			.enable_mask = 0x48,	\
 		},	\
 	}

 #define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step)	\
 	[_chip ## _ ## _name] = {	\
 		.desc = {	\
 			.name = #_name,	\
 			.n_voltages = ((max) - (min)) / (step) + 1,	\
 			.ops = &pfuze100_ldo_regulator_ops,	\
 			.type = REGULATOR_VOLTAGE,	\
 			.id = _chip ## _ ## _name,	\
 			.owner = THIS_MODULE,	\
 			.min_uV = (min),	\
 			.uV_step = (step),	\
 			.vsel_reg = (base),	\
 			.vsel_mask = 0xf,	\
 			.enable_reg = (base),	\
 			.enable_mask = 0x10,	\
 		},	\
 		.stby_reg = (base),	\
 		.stby_mask = 0x20,	\
 	}

 #define PFUZE3000_VCC_REG(_chip, _name, base, min, max, step)	{	\
 	.desc = {	\
 		.name = #_name,	\
 		.n_voltages = ((max) - (min)) / (step) + 1,	\
 		.ops = &pfuze100_ldo_regulator_ops,	\
 		.type = REGULATOR_VOLTAGE,	\
 		.id = _chip ## _ ## _name,	\
 		.owner = THIS_MODULE,	\
 		.min_uV = (min),	\
 		.uV_step = (step),	\
 		.vsel_reg = (base),	\
 		.vsel_mask = 0x3,	\
 		.enable_reg = (base),	\
 		.enable_mask = 0x10,	\
 	},	\
 	.stby_reg = (base),	\
 	.stby_mask = 0x20,	\
 }


 #define PFUZE3000_SW2_REG(_chip, _name, base, min, max, step)	{	\
 	.desc = {	\
 		.name = #_name,\
 		.n_voltages = ((max) - (min)) / (step) + 1,	\
 		.ops = &pfuze100_sw_regulator_ops,	\
 		.type = REGULATOR_VOLTAGE,	\
 		.id = _chip ## _ ## _name,	\
 		.owner = THIS_MODULE,	\
 		.min_uV = (min),	\
 		.uV_step = (step),	\
 		.vsel_reg = (base) + PFUZE100_VOL_OFFSET,	\
 		.vsel_mask = 0x7,	\
 	},	\
 	.stby_reg = (base) + PFUZE100_STANDBY_OFFSET,	\
 	.stby_mask = 0x7,	\
 }

 #define PFUZE3000_SW3_REG(_chip, _name, base, min, max, step)	{	\
 	.desc = {	\
 		.name = #_name,\
 		.n_voltages = ((max) - (min)) / (step) + 1,	\
 		.ops = &pfuze100_sw_regulator_ops,	\
 		.type = REGULATOR_VOLTAGE,	\
 		.id = _chip ## _ ## _name,	\
 		.owner = THIS_MODULE,	\
 		.min_uV = (min),	\
 		.uV_step = (step),	\
 		.vsel_reg = (base) + PFUZE100_VOL_OFFSET,	\
 		.vsel_mask = 0xf,	\
 	},	\
 	.stby_reg = (base) + PFUZE100_STANDBY_OFFSET,	\
 	.stby_mask = 0xf,	\
 }

 /* PFUZE100 */
 static struct pfuze_regulator pfuze100_regulators[] = {
 	PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 	PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
 	PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 	PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 	PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 	PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
 	PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 	PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 	PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 	PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 	PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 	PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 };

 static struct pfuze_regulator pfuze200_regulators[] = {
 	PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 	PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 	PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 	PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 	PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 	PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 	PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 	PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 	PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 	PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 };

 static struct pfuze_regulator pfuze3000_regulators[] = {
 	PFUZE100_SW_REG(PFUZE3000, SW1A, PFUZE100_SW1ABVOL, 700000, 1475000, 25000),
 	PFUZE100_SW_REG(PFUZE3000, SW1B, PFUZE100_SW1CVOL, 700000, 1475000, 25000),
 	PFUZE100_SWB_REG(PFUZE3000, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
 	PFUZE3000_SW3_REG(PFUZE3000, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
 	PFUZE100_SWB_REG(PFUZE3000, SWBST, PFUZE100_SWBSTCON1, 0x3, pfuze100_swbst),
 	PFUZE100_SWB_REG(PFUZE3000, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 	PFUZE100_FIXED_REG(PFUZE3000, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 	PFUZE100_VGEN_REG(PFUZE3000, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE3000, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 	PFUZE3000_VCC_REG(PFUZE3000, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
 	PFUZE3000_VCC_REG(PFUZE3000, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
 	PFUZE100_VGEN_REG(PFUZE3000, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 	PFUZE100_VGEN_REG(PFUZE3000, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 };

 #ifdef CONFIG_OF
 /* PFUZE100 */
 static struct of_regulator_match pfuze100_matches[] = {
 	{ .name = "sw1ab",	},
 	{ .name = "sw1c",	},
 	{ .name = "sw2",	},
 	{ .name = "sw3a",	},
 	{ .name = "sw3b",	},
 	{ .name = "sw4",	},
 	{ .name = "swbst",	},
 	{ .name = "vsnvs",	},
 	{ .name = "vrefddr",	},
 	{ .name = "vgen1",	},
 	{ .name = "vgen2",	},
 	{ .name = "vgen3",	},
 	{ .name = "vgen4",	},
 	{ .name = "vgen5",	},
 	{ .name = "vgen6",	},
 };

 /* PFUZE200 */
 static struct of_regulator_match pfuze200_matches[] = {

 	{ .name = "sw1ab",	},
 	{ .name = "sw2",	},
 	{ .name = "sw3a",	},
 	{ .name = "sw3b",	},
 	{ .name = "swbst",	},
 	{ .name = "vsnvs",	},
 	{ .name = "vrefddr",	},
 	{ .name = "vgen1",	},
 	{ .name = "vgen2",	},
 	{ .name = "vgen3",	},
 	{ .name = "vgen4",	},
 	{ .name = "vgen5",	},
 	{ .name = "vgen6",	},
 };

 /* PFUZE3000 */
 static struct of_regulator_match pfuze3000_matches[] = {

 	{ .name = "sw1a",	},
 	{ .name = "sw1b",	},
 	{ .name = "sw2",	},
 	{ .name = "sw3",	},
 	{ .name = "swbst",	},
 	{ .name = "vsnvs",	},
 	{ .name = "vrefddr",	},
 	{ .name = "vldo1",	},
 	{ .name = "vldo2",	},
 	{ .name = "vccsd",	},
 	{ .name = "v33",	},
 	{ .name = "vldo3",	},
 	{ .name = "vldo4",	},
 };

 static struct of_regulator_match *pfuze_matches;

 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 {
 	struct device *dev = chip->dev;
 	struct device_node *np, *parent;
 	int ret;

 	np = of_node_get(dev->of_node);
 	if (!np)
 		return -EINVAL;

 	parent = of_get_child_by_name(np, "regulators");
 	if (!parent) {
 		dev_err(dev, "regulators node not found\n");
 		return -EINVAL;
 	}

 	switch (chip->chip_id) {
 	case PFUZE3000:
 		pfuze_matches = pfuze3000_matches;
 		ret = of_regulator_match(dev, parent, pfuze3000_matches,
 					 ARRAY_SIZE(pfuze3000_matches));
 		break;
 	case PFUZE200:
 		pfuze_matches = pfuze200_matches;
 		ret = of_regulator_match(dev, parent, pfuze200_matches,
 					 ARRAY_SIZE(pfuze200_matches));
 		break;

 	case PFUZE100:
 	default:
 		pfuze_matches = pfuze100_matches;
 		ret = of_regulator_match(dev, parent, pfuze100_matches,
 					 ARRAY_SIZE(pfuze100_matches));
 		break;
 	}

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

 	return 0;
 }

 static inline struct regulator_init_data *match_init_data(int index)
 {
 	return pfuze_matches[index].init_data;
 }

 static inline struct device_node *match_of_node(int index)
 {
 	return pfuze_matches[index].of_node;
 }
 #else
 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 {
 	return 0;
 }

 static inline struct regulator_init_data *match_init_data(int index)
 {
 	return NULL;
 }

 static inline struct device_node *match_of_node(int index)
 {
 	return NULL;
 }
 #endif

 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
 {
 	unsigned int value;
 	int ret;

 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
 	if (ret)
 		return ret;

 	if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
 		/*
 		 * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
 		 * as ID=8 in PFUZE100
 		 */
 		dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
 	} else if ((value & 0x0f) != pfuze_chip->chip_id &&
 		   (value & 0xf0) >> 4 != pfuze_chip->chip_id) {
 		/* device id NOT match with your setting */
 		dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
 		return -ENODEV;
 	}

 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
 	if (ret)
 		return ret;
 	dev_info(pfuze_chip->dev,
 		 "Full layer: %x, Metal layer: %x\n",
 		 (value & 0xf0) >> 4, value & 0x0f);

 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
 	if (ret)
 		return ret;
 	dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
 		 (value & 0xc) >> 2, value & 0x3);

 	return 0;
 }

 static const struct regmap_config pfuze_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = PFUZE_NUMREGS - 1,
 	.cache_type = REGCACHE_RBTREE,
 };

 static int pfuze100_regulator_probe(struct i2c_client *client,
 				    const struct i2c_device_id *id)
 {
 	struct pfuze_chip *pfuze_chip;
 	struct pfuze_regulator_platform_data *pdata =
 	    dev_get_platdata(&client->dev);
 	struct regulator_config config = { };
 	int i, ret;
 	const struct of_device_id *match;
 	u32 regulator_num;
 	u32 sw_check_start, sw_check_end, sw_hi = 0x40;

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

 	if (client->dev.of_node) {
 		match = of_match_device(of_match_ptr(pfuze_dt_ids),
 				&client->dev);
 		if (!match) {
 			dev_err(&client->dev, "Error: No device match found\n");
 			return -ENODEV;
 		}
 		pfuze_chip->chip_id = (int)(long)match->data;
 	} else if (id) {
 		pfuze_chip->chip_id = id->driver_data;
 	} else {
 		dev_err(&client->dev, "No dts match or id table match found\n");
 		return -ENODEV;
 	}

 	i2c_set_clientdata(client, pfuze_chip);
 	pfuze_chip->dev = &client->dev;

 	pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
 	if (IS_ERR(pfuze_chip->regmap)) {
 		ret = PTR_ERR(pfuze_chip->regmap);
 		dev_err(&client->dev,
 			"regmap allocation failed with err %d\n", ret);
 		return ret;
 	}

 	ret = pfuze_identify(pfuze_chip);
 	if (ret) {
 		dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
 		return ret;
 	}

 	/* use the right regulators after identify the right device */
 	switch (pfuze_chip->chip_id) {
 	case PFUZE3000:
 		pfuze_chip->pfuze_regulators = pfuze3000_regulators;
 		regulator_num = ARRAY_SIZE(pfuze3000_regulators);
 		sw_check_start = PFUZE3000_SW2;
 		sw_check_end = PFUZE3000_SW2;
 		sw_hi = 1 << 3;
 		break;
 	case PFUZE200:
 		pfuze_chip->pfuze_regulators = pfuze200_regulators;
 		regulator_num = ARRAY_SIZE(pfuze200_regulators);
 		sw_check_start = PFUZE200_SW2;
 		sw_check_end = PFUZE200_SW3B;
 		break;
 	case PFUZE100:
 	default:
 		pfuze_chip->pfuze_regulators = pfuze100_regulators;
 		regulator_num = ARRAY_SIZE(pfuze100_regulators);
 		sw_check_start = PFUZE100_SW2;
 		sw_check_end = PFUZE100_SW4;
 		break;
 	}
 	dev_info(&client->dev, "pfuze%s found.\n",
 		(pfuze_chip->chip_id == PFUZE100) ? "100" :
 		((pfuze_chip->chip_id == PFUZE200) ? "200" : "3000"));

 	memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators,
 		sizeof(pfuze_chip->regulator_descs));

 	ret = pfuze_parse_regulators_dt(pfuze_chip);
 	if (ret)
 		return ret;

 	for (i = 0; i < regulator_num; i++) {
 		struct regulator_init_data *init_data;
 		struct regulator_desc *desc;
 		int val;

 		desc = &pfuze_chip->regulator_descs[i].desc;

 		if (pdata)
 			init_data = pdata->init_data[i];
 		else
 			init_data = match_init_data(i);

 		/* SW2~SW4 high bit check and modify the voltage value table */
 		if (i >= sw_check_start && i <= sw_check_end) {
 			regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
 			if (val & sw_hi) {
 				if (pfuze_chip->chip_id == PFUZE3000) {
 					desc->volt_table = pfuze3000_sw2hi;
 					desc->n_voltages = ARRAY_SIZE(pfuze3000_sw2hi);
 				} else {
 					desc->min_uV = 800000;
 					desc->uV_step = 50000;
 					desc->n_voltages = 51;
 				}
 			}
 		}

 		config.dev = &client->dev;
 		config.init_data = init_data;
 		config.driver_data = pfuze_chip;
 		config.of_node = match_of_node(i);
 		config.ena_gpio = -EINVAL;

 		pfuze_chip->regulators[i] =
 			devm_regulator_register(&client->dev, desc, &config);
 		if (IS_ERR(pfuze_chip->regulators[i])) {
 			dev_err(&client->dev, "register regulator%s failed\n",
 				pfuze_chip->pfuze_regulators[i].desc.name);
 			return PTR_ERR(pfuze_chip->regulators[i]);
 		}
 	}

 	return 0;
 }

 static struct i2c_driver pfuze_driver = {
 	.id_table = pfuze_device_id,
 	.driver = {
 		.name = "pfuze100-regulator",
 		.of_match_table = pfuze_dt_ids,
 	},
 	.probe = pfuze100_regulator_probe,
 };
 module_i2c_driver(pfuze_driver);

 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/200/3000 PMIC");
 MODULE_LICENSE("GPL v2");
	/*
	* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
	*
	* 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.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/of.h>
	#include <linux/of_device.h>
	#include <linux/regulator/of_regulator.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/pfuze100.h>
	#include <linux/i2c.h>
	#include <linux/slab.h>
	#include <linux/regmap.h>

	#define PFUZE_NUMREGS 128
	#define PFUZE100_VOL_OFFSET 0
	#define PFUZE100_STANDBY_OFFSET 1
	#define PFUZE100_MODE_OFFSET 3
	#define PFUZE100_CONF_OFFSET 4

	#define PFUZE100_DEVICEID 0x0
	#define PFUZE100_REVID 0x3
	#define PFUZE100_FABID 0x4

	#define PFUZE100_SW1ABVOL 0x20
	#define PFUZE100_SW1CVOL 0x2e
	#define PFUZE100_SW2VOL 0x35
	#define PFUZE100_SW3AVOL 0x3c
	#define PFUZE100_SW3BVOL 0x43
	#define PFUZE100_SW4VOL 0x4a
	#define PFUZE100_SWBSTCON1 0x66
	#define PFUZE100_VREFDDRCON 0x6a
	#define PFUZE100_VSNVSVOL 0x6b
	#define PFUZE100_VGEN1VOL 0x6c
	#define PFUZE100_VGEN2VOL 0x6d
	#define PFUZE100_VGEN3VOL 0x6e
	#define PFUZE100_VGEN4VOL 0x6f
	#define PFUZE100_VGEN5VOL 0x70
	#define PFUZE100_VGEN6VOL 0x71

	enum chips { PFUZE100, PFUZE200, PFUZE3000 = 3 };

	struct pfuze_regulator {
	struct regulator_desc desc;
	unsigned char stby_reg;
	unsigned char stby_mask;
	};

	struct pfuze_chip {
	int chip_id;
	struct regmap *regmap;
	struct device *dev;
	struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
	struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
	struct pfuze_regulator *pfuze_regulators;
	};

	static const int pfuze100_swbst[] = {
	5000000, 5050000, 5100000, 5150000,
	};

	static const int pfuze100_vsnvs[] = {
	1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
	};

	static const int pfuze3000_sw2lo[] = {
	1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000,
	};

	static const int pfuze3000_sw2hi[] = {
	2500000, 2800000, 2850000, 3000000, 3100000, 3150000, 3200000, 3300000,
	};

	static const struct i2c_device_id pfuze_device_id[] = {
	{.name = "pfuze100", .driver_data = PFUZE100},
	{.name = "pfuze200", .driver_data = PFUZE200},
	{.name = "pfuze3000", .driver_data = PFUZE3000},
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, pfuze_device_id);

	static const struct of_device_id pfuze_dt_ids[] = {
	{ .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
	{ .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
	{ .compatible = "fsl,pfuze3000", .data = (void *)PFUZE3000},
	{ }
	};
	MODULE_DEVICE_TABLE(of, pfuze_dt_ids);

	static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	{
	struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	unsigned int ramp_bits;
	int ret;

	if (id < PFUZE100_SWBST) {
	ramp_delay = 12500 / ramp_delay;
	ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
	ret = regmap_update_bits(pfuze100->regmap,
	rdev->desc->vsel_reg + 4,
	0xc0, ramp_bits << 6);
	if (ret < 0)
	dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
	} else
	ret = -EACCES;

	return ret;
	}

	static const struct regulator_ops pfuze100_ldo_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	};

	static const struct regulator_ops pfuze100_fixed_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	};

	static const struct regulator_ops pfuze100_sw_regulator_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_ramp_delay = pfuze100_set_ramp_delay,
	};

	static const struct regulator_ops pfuze100_swb_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.list_voltage = regulator_list_voltage_table,
	.map_voltage = regulator_map_voltage_ascend,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	};

	#define PFUZE100_FIXED_REG(_chip, _name, base, voltage) \
	[_chip ## _ ## _name] = { \
	.desc = { \
	.name = #_name, \
	.n_voltages = 1, \
	.ops = &pfuze100_fixed_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (voltage), \
	.enable_reg = (base), \
	.enable_mask = 0x10, \
	}, \
	}

	#define PFUZE100_SW_REG(_chip, _name, base, min, max, step) \
	[_chip ## _ ## _name] = { \
	.desc = { \
	.name = #_name,\
	.n_voltages = ((max) - (min)) / (step) + 1, \
	.ops = &pfuze100_sw_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (min), \
	.uV_step = (step), \
	.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
	.vsel_mask = 0x3f, \
	}, \
	.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
	.stby_mask = 0x3f, \
	}

	#define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages) \
	[_chip ## _ ## _name] = { \
	.desc = { \
	.name = #_name, \
	.n_voltages = ARRAY_SIZE(voltages), \
	.ops = &pfuze100_swb_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.volt_table = voltages, \
	.vsel_reg = (base), \
	.vsel_mask = (mask), \
	.enable_reg = (base), \
	.enable_mask = 0x48, \
	}, \
	}

	#define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step) \
	[_chip ## _ ## _name] = { \
	.desc = { \
	.name = #_name, \
	.n_voltages = ((max) - (min)) / (step) + 1, \
	.ops = &pfuze100_ldo_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (min), \
	.uV_step = (step), \
	.vsel_reg = (base), \
	.vsel_mask = 0xf, \
	.enable_reg = (base), \
	.enable_mask = 0x10, \
	}, \
	.stby_reg = (base), \
	.stby_mask = 0x20, \
	}

	#define PFUZE3000_VCC_REG(_chip, _name, base, min, max, step) { \
	.desc = { \
	.name = #_name, \
	.n_voltages = ((max) - (min)) / (step) + 1, \
	.ops = &pfuze100_ldo_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (min), \
	.uV_step = (step), \
	.vsel_reg = (base), \
	.vsel_mask = 0x3, \
	.enable_reg = (base), \
	.enable_mask = 0x10, \
	}, \
	.stby_reg = (base), \
	.stby_mask = 0x20, \
	}


	#define PFUZE3000_SW2_REG(_chip, _name, base, min, max, step) { \
	.desc = { \
	.name = #_name,\
	.n_voltages = ((max) - (min)) / (step) + 1, \
	.ops = &pfuze100_sw_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (min), \
	.uV_step = (step), \
	.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
	.vsel_mask = 0x7, \
	}, \
	.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
	.stby_mask = 0x7, \
	}

	#define PFUZE3000_SW3_REG(_chip, _name, base, min, max, step) { \
	.desc = { \
	.name = #_name,\
	.n_voltages = ((max) - (min)) / (step) + 1, \
	.ops = &pfuze100_sw_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (min), \
	.uV_step = (step), \
	.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
	.vsel_mask = 0xf, \
	}, \
	.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
	.stby_mask = 0xf, \
	}

	/* PFUZE100 */
	static struct pfuze_regulator pfuze100_regulators[] = {
	PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
	PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
	PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
	PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
	PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
	PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
	PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
	PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
	PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
	PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
	PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
	PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
	};

	static struct pfuze_regulator pfuze200_regulators[] = {
	PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
	PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
	PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
	PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
	PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
	PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
	PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
	PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
	PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
	PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
	};

	static struct pfuze_regulator pfuze3000_regulators[] = {
	PFUZE100_SW_REG(PFUZE3000, SW1A, PFUZE100_SW1ABVOL, 700000, 1475000, 25000),
	PFUZE100_SW_REG(PFUZE3000, SW1B, PFUZE100_SW1CVOL, 700000, 1475000, 25000),
	PFUZE100_SWB_REG(PFUZE3000, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
	PFUZE3000_SW3_REG(PFUZE3000, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
	PFUZE100_SWB_REG(PFUZE3000, SWBST, PFUZE100_SWBSTCON1, 0x3, pfuze100_swbst),
	PFUZE100_SWB_REG(PFUZE3000, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
	PFUZE100_FIXED_REG(PFUZE3000, VREFDDR, PFUZE100_VREFDDRCON, 750000),
	PFUZE100_VGEN_REG(PFUZE3000, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE3000, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
	PFUZE3000_VCC_REG(PFUZE3000, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
	PFUZE3000_VCC_REG(PFUZE3000, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
	PFUZE100_VGEN_REG(PFUZE3000, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
	PFUZE100_VGEN_REG(PFUZE3000, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
	};

	#ifdef CONFIG_OF
	/* PFUZE100 */
	static struct of_regulator_match pfuze100_matches[] = {
	{ .name = "sw1ab", },
	{ .name = "sw1c", },
	{ .name = "sw2", },
	{ .name = "sw3a", },
	{ .name = "sw3b", },
	{ .name = "sw4", },
	{ .name = "swbst", },
	{ .name = "vsnvs", },
	{ .name = "vrefddr", },
	{ .name = "vgen1", },
	{ .name = "vgen2", },
	{ .name = "vgen3", },
	{ .name = "vgen4", },
	{ .name = "vgen5", },
	{ .name = "vgen6", },
	};

	/* PFUZE200 */
	static struct of_regulator_match pfuze200_matches[] = {

	{ .name = "sw1ab", },
	{ .name = "sw2", },
	{ .name = "sw3a", },
	{ .name = "sw3b", },
	{ .name = "swbst", },
	{ .name = "vsnvs", },
	{ .name = "vrefddr", },
	{ .name = "vgen1", },
	{ .name = "vgen2", },
	{ .name = "vgen3", },
	{ .name = "vgen4", },
	{ .name = "vgen5", },
	{ .name = "vgen6", },
	};

	/* PFUZE3000 */
	static struct of_regulator_match pfuze3000_matches[] = {

	{ .name = "sw1a", },
	{ .name = "sw1b", },
	{ .name = "sw2", },
	{ .name = "sw3", },
	{ .name = "swbst", },
	{ .name = "vsnvs", },
	{ .name = "vrefddr", },
	{ .name = "vldo1", },
	{ .name = "vldo2", },
	{ .name = "vccsd", },
	{ .name = "v33", },
	{ .name = "vldo3", },
	{ .name = "vldo4", },
	};

	static struct of_regulator_match *pfuze_matches;

	static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
	{
	struct device *dev = chip->dev;
	struct device_node np, parent;
	int ret;

	np = of_node_get(dev->of_node);
	if (!np)
	return -EINVAL;

	parent = of_get_child_by_name(np, "regulators");
	if (!parent) {
	dev_err(dev, "regulators node not found\n");
	return -EINVAL;
	}

	switch (chip->chip_id) {
	case PFUZE3000:
	pfuze_matches = pfuze3000_matches;
	ret = of_regulator_match(dev, parent, pfuze3000_matches,
	ARRAY_SIZE(pfuze3000_matches));
	break;
	case PFUZE200:
	pfuze_matches = pfuze200_matches;
	ret = of_regulator_match(dev, parent, pfuze200_matches,
	ARRAY_SIZE(pfuze200_matches));
	break;

	case PFUZE100:
	default:
	pfuze_matches = pfuze100_matches;
	ret = of_regulator_match(dev, parent, pfuze100_matches,
	ARRAY_SIZE(pfuze100_matches));
	break;
	}

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

	return 0;
	}

	static inline struct regulator_init_data *match_init_data(int index)
	{
	return pfuze_matches[index].init_data;
	}

	static inline struct device_node *match_of_node(int index)
	{
	return pfuze_matches[index].of_node;
	}
	#else
	static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
	{
	return 0;
	}

	static inline struct regulator_init_data *match_init_data(int index)
	{
	return NULL;
	}

	static inline struct device_node *match_of_node(int index)
	{
	return NULL;
	}
	#endif

	static int pfuze_identify(struct pfuze_chip *pfuze_chip)
	{
	unsigned int value;
	int ret;

	ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
	if (ret)
	return ret;

	if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
	/*
	* Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
	* as ID=8 in PFUZE100
	*/
	dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
	} else if ((value & 0x0f) != pfuze_chip->chip_id &&
	(value & 0xf0) >> 4 != pfuze_chip->chip_id) {
	/* device id NOT match with your setting */
	dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
	return -ENODEV;
	}

	ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
	if (ret)
	return ret;
	dev_info(pfuze_chip->dev,
	"Full layer: %x, Metal layer: %x\n",
	(value & 0xf0) >> 4, value & 0x0f);

	ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
	if (ret)
	return ret;
	dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
	(value & 0xc) >> 2, value & 0x3);

	return 0;
	}

	static const struct regmap_config pfuze_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = PFUZE_NUMREGS - 1,
	.cache_type = REGCACHE_RBTREE,
	};

	static int pfuze100_regulator_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct pfuze_chip *pfuze_chip;
	struct pfuze_regulator_platform_data *pdata =
	dev_get_platdata(&client->dev);
	struct regulator_config config = { };
	int i, ret;
	const struct of_device_id *match;
	u32 regulator_num;
	u32 sw_check_start, sw_check_end, sw_hi = 0x40;

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

	if (client->dev.of_node) {
	match = of_match_device(of_match_ptr(pfuze_dt_ids),
	&client->dev);
	if (!match) {
	dev_err(&client->dev, "Error: No device match found\n");
	return -ENODEV;
	}
	pfuze_chip->chip_id = (int)(long)match->data;
	} else if (id) {
	pfuze_chip->chip_id = id->driver_data;
	} else {
	dev_err(&client->dev, "No dts match or id table match found\n");
	return -ENODEV;
	}

	i2c_set_clientdata(client, pfuze_chip);
	pfuze_chip->dev = &client->dev;

	pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
	if (IS_ERR(pfuze_chip->regmap)) {
	ret = PTR_ERR(pfuze_chip->regmap);
	dev_err(&client->dev,
	"regmap allocation failed with err %d\n", ret);
	return ret;
	}

	ret = pfuze_identify(pfuze_chip);
	if (ret) {
	dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
	return ret;
	}

	/* use the right regulators after identify the right device */
	switch (pfuze_chip->chip_id) {
	case PFUZE3000:
	pfuze_chip->pfuze_regulators = pfuze3000_regulators;
	regulator_num = ARRAY_SIZE(pfuze3000_regulators);
	sw_check_start = PFUZE3000_SW2;
	sw_check_end = PFUZE3000_SW2;
	sw_hi = 1 << 3;
	break;
	case PFUZE200:
	pfuze_chip->pfuze_regulators = pfuze200_regulators;
	regulator_num = ARRAY_SIZE(pfuze200_regulators);
	sw_check_start = PFUZE200_SW2;
	sw_check_end = PFUZE200_SW3B;
	break;
	case PFUZE100:
	default:
	pfuze_chip->pfuze_regulators = pfuze100_regulators;
	regulator_num = ARRAY_SIZE(pfuze100_regulators);
	sw_check_start = PFUZE100_SW2;
	sw_check_end = PFUZE100_SW4;
	break;
	}
	dev_info(&client->dev, "pfuze%s found.\n",
	(pfuze_chip->chip_id == PFUZE100) ? "100" :
	((pfuze_chip->chip_id == PFUZE200) ? "200" : "3000"));

	memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators,
	sizeof(pfuze_chip->regulator_descs));

	ret = pfuze_parse_regulators_dt(pfuze_chip);
	if (ret)
	return ret;

	for (i = 0; i < regulator_num; i++) {
	struct regulator_init_data *init_data;
	struct regulator_desc *desc;
	int val;

	desc = &pfuze_chip->regulator_descs[i].desc;

	if (pdata)
	init_data = pdata->init_data[i];
	else
	init_data = match_init_data(i);

	/* SW2~SW4 high bit check and modify the voltage value table */
	if (i >= sw_check_start && i <= sw_check_end) {
	regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
	if (val & sw_hi) {
	if (pfuze_chip->chip_id == PFUZE3000) {
	desc->volt_table = pfuze3000_sw2hi;
	desc->n_voltages = ARRAY_SIZE(pfuze3000_sw2hi);
	} else {
	desc->min_uV = 800000;
	desc->uV_step = 50000;
	desc->n_voltages = 51;
	}
	}
	}

	config.dev = &client->dev;
	config.init_data = init_data;
	config.driver_data = pfuze_chip;
	config.of_node = match_of_node(i);
	config.ena_gpio = -EINVAL;

	pfuze_chip->regulators[i] =
	devm_regulator_register(&client->dev, desc, &config);
	if (IS_ERR(pfuze_chip->regulators[i])) {
	dev_err(&client->dev, "register regulator%s failed\n",
	pfuze_chip->pfuze_regulators[i].desc.name);
	return PTR_ERR(pfuze_chip->regulators[i]);
	}
	}

	return 0;
	}

	static struct i2c_driver pfuze_driver = {
	.id_table = pfuze_device_id,
	.driver = {
	.name = "pfuze100-regulator",
	.of_match_table = pfuze_dt_ids,
	},
	.probe = pfuze100_regulator_probe,
	};
	module_i2c_driver(pfuze_driver);

	MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
	MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/200/3000 PMIC");
	MODULE_LICENSE("GPL v2");