/*
   * drivers/regulator/ab3100.c
   *
   * Copyright (C) 2008-2009 ST-Ericsson AB
   * License terms: GNU General Public License (GPL) version 2
   * Low-level control of the AB3100 IC Low Dropout (LDO)
   * regulators, external regulator and buck converter
   * Author: Mattias Wallin <mattias.wallin@stericsson.com>
   * Author: Linus Walleij <linus.walleij@stericsson.com>
   */
  
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/init.h>
  #include <linux/err.h>
  #include <linux/platform_device.h>
  #include <linux/regulator/driver.h>
  #include <linux/mfd/ab3100.h>
  #include <linux/mfd/abx500.h>
  #include <linux/of.h>
  #include <linux/regulator/of_regulator.h>
  
  /* LDO registers and some handy masking definitions for AB3100 */
  #define AB3100_LDO_A		0x40
  #define AB3100_LDO_C		0x41
  #define AB3100_LDO_D		0x42
  #define AB3100_LDO_E		0x43
  #define AB3100_LDO_E_SLEEP	0x44
  #define AB3100_LDO_F		0x45
  #define AB3100_LDO_G		0x46
  #define AB3100_LDO_H		0x47
  #define AB3100_LDO_H_SLEEP_MODE	0
  #define AB3100_LDO_H_SLEEP_EN	2
  #define AB3100_LDO_ON		4
  #define AB3100_LDO_H_VSEL_AC	5
  #define AB3100_LDO_K		0x48
  #define AB3100_LDO_EXT		0x49
  #define AB3100_BUCK		0x4A
  #define AB3100_BUCK_SLEEP	0x4B
  #define AB3100_REG_ON_MASK	0x10
  
  /**
   * struct ab3100_regulator
   * A struct passed around the individual regulator functions
   * @platform_device: platform device holding this regulator
   * @dev: handle to the device
   * @plfdata: AB3100 platform data passed in at probe time
   * @regreg: regulator register number in the AB3100
   */
  struct ab3100_regulator {
  	struct regulator_dev *rdev;
  	struct device *dev;
  	struct ab3100_platform_data *plfdata;
  	u8 regreg;
  };
  
  /* The order in which registers are initialized */
  static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = {
  	AB3100_LDO_A,
  	AB3100_LDO_C,
  	AB3100_LDO_E,
  	AB3100_LDO_E_SLEEP,
  	AB3100_LDO_F,
  	AB3100_LDO_G,
  	AB3100_LDO_H,
  	AB3100_LDO_K,
  	AB3100_LDO_EXT,
  	AB3100_BUCK,
  	AB3100_BUCK_SLEEP,
  	AB3100_LDO_D,
  };
  
  /* Preset (hardware defined) voltages for these regulators */
  #define LDO_A_VOLTAGE 2750000
  #define LDO_C_VOLTAGE 2650000
  #define LDO_D_VOLTAGE 2650000
  
  static const unsigned int ldo_e_buck_typ_voltages[] = {
  	1800000,
  	1400000,
  	1300000,
  	1200000,
  	1100000,
  	1050000,
  	900000,
  };
  
  static const unsigned int ldo_f_typ_voltages[] = {
  	1800000,
  	1400000,
  	1300000,
  	1200000,
  	1100000,
  	1050000,
  	2500000,
  	2650000,
  };
  
  static const unsigned int ldo_g_typ_voltages[] = {
  	2850000,
  	2750000,
  	1800000,
  	1500000,
  };
  
  static const unsigned int ldo_h_typ_voltages[] = {
  	2750000,
  	1800000,
  	1500000,
  	1200000,
  };
  
  static const unsigned int ldo_k_typ_voltages[] = {
  	2750000,
  	1800000,
  };
  
  
  /* The regulator devices */
  static struct ab3100_regulator
  ab3100_regulators[AB3100_NUM_REGULATORS] = {
  	{
  		.regreg = AB3100_LDO_A,
  	},
  	{
  		.regreg = AB3100_LDO_C,
  	},
  	{
  		.regreg = AB3100_LDO_D,
  	},
  	{
  		.regreg = AB3100_LDO_E,
  	},
  	{
  		.regreg = AB3100_LDO_F,
  	},
  	{
  		.regreg = AB3100_LDO_G,
  	},
  	{
  		.regreg = AB3100_LDO_H,
  	},
  	{
  		.regreg = AB3100_LDO_K,
  	},
  	{
  		.regreg = AB3100_LDO_EXT,
  		/* No voltages for the external regulator */
  	},
  	{
  		.regreg = AB3100_BUCK,
  	},
  };
  
  /*
   * General functions for enable, disable and is_enabled used for
   * LDO: A,C,E,F,G,H,K,EXT and BUCK
   */
  static int ab3100_enable_regulator(struct regulator_dev *reg)
  {
  	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
  	int err;
  	u8 regval;
  
  	err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg,
  						&regval);
  	if (err) {
  		dev_warn(&reg->dev, "failed to get regid %d value
  ",
  			 abreg->regreg);
  		return err;
  	}
  
  	/* The regulator is already on, no reason to go further */
  	if (regval & AB3100_REG_ON_MASK)
  		return 0;
  
  	regval |= AB3100_REG_ON_MASK;
  
  	err = abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg,
  						regval);
  	if (err) {
  		dev_warn(&reg->dev, "failed to set regid %d value
  ",
  			 abreg->regreg);
  		return err;
  	}
  
  	return 0;
  }
  
  static int ab3100_disable_regulator(struct regulator_dev *reg)
  {
  	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
  	int err;
  	u8 regval;
  
  	/*
  	 * LDO D is a special regulator. When it is disabled, the entire
  	 * system is shut down. So this is handled specially.
  	 */
  	pr_info("Called ab3100_disable_regulator
  ");
  	if (abreg->regreg == AB3100_LDO_D) {
  		dev_info(&reg->dev, "disabling LDO D - shut down system
  ");
  		/* Setting LDO D to 0x00 cuts the power to the SoC */
  		return abx500_set_register_interruptible(abreg->dev, 0,
  							 AB3100_LDO_D, 0x00U);
  	}
  
  	/*
  	 * All other regulators are handled here
  	 */
  	err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg,
  						&regval);
  	if (err) {
  		dev_err(&reg->dev, "unable to get register 0x%x
  ",
  			abreg->regreg);
  		return err;
  	}
  	regval &= ~AB3100_REG_ON_MASK;
  	return abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg,
  						 regval);
  }
  
  static int ab3100_is_enabled_regulator(struct regulator_dev *reg)
  {
  	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
  	u8 regval;
  	int err;
  
  	err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg,
  						&regval);
  	if (err) {
  		dev_err(&reg->dev, "unable to get register 0x%x
  ",
  			abreg->regreg);
  		return err;
  	}
  
  	return regval & AB3100_REG_ON_MASK;
  }
  
  static int ab3100_get_voltage_regulator(struct regulator_dev *reg)
  {
  	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
  	u8 regval;
  	int err;
  
  	/*
  	 * For variable types, read out setting and index into
  	 * supplied voltage list.
  	 */
  	err = abx500_get_register_interruptible(abreg->dev, 0,
  						abreg->regreg, &regval);
  	if (err) {
  		dev_warn(&reg->dev,
  			 "failed to get regulator value in register %02x
  ",
  			 abreg->regreg);
  		return err;
  	}
  
  	/* The 3 highest bits index voltages */
  	regval &= 0xE0;
  	regval >>= 5;
  
  	if (regval >= reg->desc->n_voltages) {
  		dev_err(&reg->dev,
  			"regulator register %02x contains an illegal voltage setting
  ",
  			abreg->regreg);
  		return -EINVAL;
  	}
  
  	return reg->desc->volt_table[regval];
  }
  
  static int ab3100_set_voltage_regulator_sel(struct regulator_dev *reg,
  					    unsigned selector)
  {
  	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
  	u8 regval;
  	int err;
  
  	err = abx500_get_register_interruptible(abreg->dev, 0,
  						abreg->regreg, &regval);
  	if (err) {
  		dev_warn(&reg->dev,
  			 "failed to get regulator register %02x
  ",
  			 abreg->regreg);
  		return err;
  	}
  
  	/* The highest three bits control the variable regulators */
  	regval &= ~0xE0;
  	regval |= (selector << 5);
  
  	err = abx500_set_register_interruptible(abreg->dev, 0,
  						abreg->regreg, regval);
  	if (err)
  		dev_warn(&reg->dev, "failed to set regulator register %02x
  ",
  			abreg->regreg);
  
  	return err;
  }
  
  static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg,
  						int uV)
  {
  	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
  	u8 regval;
  	int err;
  	int bestindex;
  	u8 targetreg;
  
  	if (abreg->regreg == AB3100_LDO_E)
  		targetreg = AB3100_LDO_E_SLEEP;
  	else if (abreg->regreg == AB3100_BUCK)
  		targetreg = AB3100_BUCK_SLEEP;
  	else
  		return -EINVAL;
  
  	/* LDO E and BUCK have special suspend voltages you can set */
  	bestindex = regulator_map_voltage_iterate(reg, uV, uV);
  
  	err = abx500_get_register_interruptible(abreg->dev, 0,
  						targetreg, &regval);
  	if (err) {
  		dev_warn(&reg->dev,
  			 "failed to get regulator register %02x
  ",
  			 targetreg);
  		return err;
  	}
  
  	/* The highest three bits control the variable regulators */
  	regval &= ~0xE0;
  	regval |= (bestindex << 5);
  
  	err = abx500_set_register_interruptible(abreg->dev, 0,
  						targetreg, regval);
  	if (err)
  		dev_warn(&reg->dev, "failed to set regulator register %02x
  ",
  			abreg->regreg);
  
  	return err;
  }
  
  /*
   * The external regulator can just define a fixed voltage.
   */
  static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg)
  {
  	struct ab3100_regulator *abreg = rdev_get_drvdata(reg);
  
  	if (abreg->plfdata)
  		return abreg->plfdata->external_voltage;
  	else
  		/* TODO: encode external voltage into device tree */
  		return 0;
  }
  
  static struct regulator_ops regulator_ops_fixed = {
  	.list_voltage = regulator_list_voltage_linear,
  	.enable      = ab3100_enable_regulator,
  	.disable     = ab3100_disable_regulator,
  	.is_enabled  = ab3100_is_enabled_regulator,
  };
  
  static struct regulator_ops regulator_ops_variable = {
  	.enable      = ab3100_enable_regulator,
  	.disable     = ab3100_disable_regulator,
  	.is_enabled  = ab3100_is_enabled_regulator,
  	.get_voltage = ab3100_get_voltage_regulator,
  	.set_voltage_sel = ab3100_set_voltage_regulator_sel,
  	.list_voltage = regulator_list_voltage_table,
  };
  
  static struct regulator_ops regulator_ops_variable_sleepable = {
  	.enable      = ab3100_enable_regulator,
  	.disable     = ab3100_disable_regulator,
  	.is_enabled  = ab3100_is_enabled_regulator,
  	.get_voltage = ab3100_get_voltage_regulator,
  	.set_voltage_sel = ab3100_set_voltage_regulator_sel,
  	.set_suspend_voltage = ab3100_set_suspend_voltage_regulator,
  	.list_voltage = regulator_list_voltage_table,
  };
  
  /*
   * LDO EXT is an external regulator so it is really
   * not possible to set any voltage locally here, AB3100
   * is an on/off switch plain an simple. The external
   * voltage is defined in the board set-up if any.
   */
  static struct regulator_ops regulator_ops_external = {
  	.enable      = ab3100_enable_regulator,
  	.disable     = ab3100_disable_regulator,
  	.is_enabled  = ab3100_is_enabled_regulator,
  	.get_voltage = ab3100_get_voltage_regulator_external,
  };
  
  static struct regulator_desc
  ab3100_regulator_desc[AB3100_NUM_REGULATORS] = {
  	{
  		.name = "LDO_A",
  		.id   = AB3100_LDO_A,
  		.ops  = &regulator_ops_fixed,
  		.n_voltages = 1,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.min_uV = LDO_A_VOLTAGE,
  		.enable_time = 200,
  	},
  	{
  		.name = "LDO_C",
  		.id   = AB3100_LDO_C,
  		.ops  = &regulator_ops_fixed,
  		.n_voltages = 1,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.min_uV = LDO_C_VOLTAGE,
  		.enable_time = 200,
  	},
  	{
  		.name = "LDO_D",
  		.id   = AB3100_LDO_D,
  		.ops  = &regulator_ops_fixed,
  		.n_voltages = 1,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.min_uV = LDO_D_VOLTAGE,
  		.enable_time = 200,
  	},
  	{
  		.name = "LDO_E",
  		.id   = AB3100_LDO_E,
  		.ops  = &regulator_ops_variable_sleepable,
  		.n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages),
  		.volt_table = ldo_e_buck_typ_voltages,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.enable_time = 200,
  	},
  	{
  		.name = "LDO_F",
  		.id   = AB3100_LDO_F,
  		.ops  = &regulator_ops_variable,
  		.n_voltages = ARRAY_SIZE(ldo_f_typ_voltages),
  		.volt_table = ldo_f_typ_voltages,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.enable_time = 600,
  	},
  	{
  		.name = "LDO_G",
  		.id   = AB3100_LDO_G,
  		.ops  = &regulator_ops_variable,
  		.n_voltages = ARRAY_SIZE(ldo_g_typ_voltages),
  		.volt_table = ldo_g_typ_voltages,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.enable_time = 400,
  	},
  	{
  		.name = "LDO_H",
  		.id   = AB3100_LDO_H,
  		.ops  = &regulator_ops_variable,
  		.n_voltages = ARRAY_SIZE(ldo_h_typ_voltages),
  		.volt_table = ldo_h_typ_voltages,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.enable_time = 200,
  	},
  	{
  		.name = "LDO_K",
  		.id   = AB3100_LDO_K,
  		.ops  = &regulator_ops_variable,
  		.n_voltages = ARRAY_SIZE(ldo_k_typ_voltages),
  		.volt_table = ldo_k_typ_voltages,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.enable_time = 200,
  	},
  	{
  		.name = "LDO_EXT",
  		.id   = AB3100_LDO_EXT,
  		.ops  = &regulator_ops_external,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  	},
  	{
  		.name = "BUCK",
  		.id   = AB3100_BUCK,
  		.ops  = &regulator_ops_variable_sleepable,
  		.n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages),
  		.volt_table = ldo_e_buck_typ_voltages,
  		.type = REGULATOR_VOLTAGE,
  		.owner = THIS_MODULE,
  		.enable_time = 1000,
  	},
  };
  
  static int ab3100_regulator_register(struct platform_device *pdev,
  				     struct ab3100_platform_data *plfdata,
  				     struct regulator_init_data *init_data,
  				     struct device_node *np,
  				     unsigned long id)
  {
  	struct regulator_desc *desc;
  	struct ab3100_regulator *reg;
  	struct regulator_dev *rdev;
  	struct regulator_config config = { };
  	int err, i;
  
  	for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
  		desc = &ab3100_regulator_desc[i];
  		if (desc->id == id)
  			break;
  	}
  	if (desc->id != id)
  		return -ENODEV;
  
  	/* Same index used for this array */
  	reg = &ab3100_regulators[i];
  
  	/*
  	 * Initialize per-regulator struct.
  	 * Inherit platform data, this comes down from the
  	 * i2c boarddata, from the machine. So if you want to
  	 * see what it looks like for a certain machine, go
  	 * into the machine I2C setup.
  	 */
  	reg->dev = &pdev->dev;
  	if (plfdata) {
  		reg->plfdata = plfdata;
  		config.init_data = &plfdata->reg_constraints[i];
  	} else if (np) {
  		config.of_node = np;
  		config.init_data = init_data;
  	}
  	config.dev = &pdev->dev;
  	config.driver_data = reg;
  
  	rdev = devm_regulator_register(&pdev->dev, desc, &config);
  	if (IS_ERR(rdev)) {
  		err = PTR_ERR(rdev);
  		dev_err(&pdev->dev,
  			"%s: failed to register regulator %s err %d
  ",
  			__func__, desc->name,
  			err);
  		return err;
  	}
  
  	/* Then set a pointer back to the registered regulator */
  	reg->rdev = rdev;
  	return 0;
  }
  
  static struct of_regulator_match ab3100_regulator_matches[] = {
  	{ .name = "ab3100_ldo_a", .driver_data = (void *) AB3100_LDO_A, },
  	{ .name = "ab3100_ldo_c", .driver_data = (void *) AB3100_LDO_C, },
  	{ .name = "ab3100_ldo_d", .driver_data = (void *) AB3100_LDO_D, },
  	{ .name = "ab3100_ldo_e", .driver_data = (void *) AB3100_LDO_E, },
  	{ .name = "ab3100_ldo_f", .driver_data = (void *) AB3100_LDO_F },
  	{ .name = "ab3100_ldo_g", .driver_data = (void *) AB3100_LDO_G },
  	{ .name = "ab3100_ldo_h", .driver_data = (void *) AB3100_LDO_H },
  	{ .name = "ab3100_ldo_k", .driver_data = (void *) AB3100_LDO_K },
  	{ .name = "ab3100_ext", .driver_data = (void *) AB3100_LDO_EXT },
  	{ .name = "ab3100_buck", .driver_data = (void *) AB3100_BUCK },
  };
  
  /*
   * Initial settings of ab3100 registers.
   * Common for below LDO regulator settings are that
   * bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0).
   * Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode.
   */
  /* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */
  #define LDO_A_SETTING		0x16
  /* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */
  #define LDO_C_SETTING		0x10
  /* LDO_D 0x10: 2.65V, ON, sleep mode not used */
  #define LDO_D_SETTING		0x10
  /* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */
  #define LDO_E_SETTING		0x10
  /* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */
  #define LDO_E_SLEEP_SETTING	0x00
  /* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */
  #define LDO_F_SETTING		0xD0
  /* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */
  #define LDO_G_SETTING		0x00
  /* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */
  #define LDO_H_SETTING		0x18
  /* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */
  #define LDO_K_SETTING		0x00
  /* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */
  #define LDO_EXT_SETTING		0x00
  /* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */
  #define BUCK_SETTING	0x7D
  /* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */
  #define BUCK_SLEEP_SETTING	0xAC
  
  static const u8 ab3100_reg_initvals[] = {
  	LDO_A_SETTING,
  	LDO_C_SETTING,
  	LDO_E_SETTING,
  	LDO_E_SLEEP_SETTING,
  	LDO_F_SETTING,
  	LDO_G_SETTING,
  	LDO_H_SETTING,
  	LDO_K_SETTING,
  	LDO_EXT_SETTING,
  	BUCK_SETTING,
  	BUCK_SLEEP_SETTING,
  	LDO_D_SETTING,
  };
  
  static int ab3100_regulators_remove(struct platform_device *pdev)
  {
  	int i;
  
  	for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
  		struct ab3100_regulator *reg = &ab3100_regulators[i];
  
  		reg->rdev = NULL;
  	}
  	return 0;
  }
  
  static int
  ab3100_regulator_of_probe(struct platform_device *pdev, struct device_node *np)
  {
  	int err, i;
  
  	/*
  	 * Set up the regulator registers, as was previously done with
  	 * platform data.
  	 */
  	/* Set up regulators */
  	for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) {
  		err = abx500_set_register_interruptible(&pdev->dev, 0,
  					ab3100_reg_init_order[i],
  					ab3100_reg_initvals[i]);
  		if (err) {
  			dev_err(&pdev->dev, "regulator initialization failed with error %d
  ",
  				err);
  			return err;
  		}
  	}
  
  	for (i = 0; i < ARRAY_SIZE(ab3100_regulator_matches); i++) {
  		err = ab3100_regulator_register(
  			pdev, NULL, ab3100_regulator_matches[i].init_data,
  			ab3100_regulator_matches[i].of_node,
  			(unsigned long)ab3100_regulator_matches[i].driver_data);
  		if (err) {
  			ab3100_regulators_remove(pdev);
  			return err;
  		}
  	}
  
  	return 0;
  }
  
  
  static int ab3100_regulators_probe(struct platform_device *pdev)
  {
  	struct ab3100_platform_data *plfdata = dev_get_platdata(&pdev->dev);
  	struct device_node *np = pdev->dev.of_node;
  	int err = 0;
  	u8 data;
  	int i;
  
  	/* Check chip state */
  	err = abx500_get_register_interruptible(&pdev->dev, 0,
  						AB3100_LDO_D, &data);
  	if (err) {
  		dev_err(&pdev->dev, "could not read initial status of LDO_D
  ");
  		return err;
  	}
  	if (data & 0x10)
  		dev_notice(&pdev->dev,
  			   "chip is already in active mode (Warm start)
  ");
  	else
  		dev_notice(&pdev->dev,
  			   "chip is in inactive mode (Cold start)
  ");
  
  	if (np) {
  		err = of_regulator_match(&pdev->dev, np,
  					 ab3100_regulator_matches,
  					 ARRAY_SIZE(ab3100_regulator_matches));
  		if (err < 0) {
  			dev_err(&pdev->dev,
  				"Error parsing regulator init data: %d
  ", err);
  			return err;
  		}
  		return ab3100_regulator_of_probe(pdev, np);
  	}
  
  	/* Set up regulators */
  	for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) {
  		err = abx500_set_register_interruptible(&pdev->dev, 0,
  					ab3100_reg_init_order[i],
  					plfdata->reg_initvals[i]);
  		if (err) {
  			dev_err(&pdev->dev, "regulator initialization failed with error %d
  ",
  				err);
  			return err;
  		}
  	}
  
  	/* Register the regulators */
  	for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
  		struct regulator_desc *desc = &ab3100_regulator_desc[i];
  
  		err = ab3100_regulator_register(pdev, plfdata, NULL, NULL,
  						desc->id);
  		if (err) {
  			ab3100_regulators_remove(pdev);
  			return err;
  		}
  	}
  
  	return 0;
  }
  
  static struct platform_driver ab3100_regulators_driver = {
  	.driver = {
  		.name  = "ab3100-regulators",
  		.owner = THIS_MODULE,
  	},
  	.probe = ab3100_regulators_probe,
  	.remove = ab3100_regulators_remove,
  };
  
  static __init int ab3100_regulators_init(void)
  {
  	return platform_driver_register(&ab3100_regulators_driver);
  }
  
  static __exit void ab3100_regulators_exit(void)
  {
  	platform_driver_unregister(&ab3100_regulators_driver);
  }
  
  subsys_initcall(ab3100_regulators_init);
  module_exit(ab3100_regulators_exit);
  
  MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
  MODULE_DESCRIPTION("AB3100 Regulator driver");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:ab3100-regulators");