/*
   * wm831x-ldo.c  --  LDO driver for the WM831x series
   *
   * Copyright 2009 Wolfson Microelectronics PLC.
   *
   * Author: Mark Brown <broonie@opensource.wolfsonmicro.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;  either version 2 of the  License, or (at your
   *  option) any later version.
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/init.h>
  #include <linux/bitops.h>
  #include <linux/err.h>
  #include <linux/i2c.h>
  #include <linux/platform_device.h>
  #include <linux/regulator/driver.h>

  #include <linux/slab.h>

  
  #include <linux/mfd/wm831x/core.h>
  #include <linux/mfd/wm831x/regulator.h>
  #include <linux/mfd/wm831x/pdata.h>

  #define WM831X_LDO_MAX_NAME 9

  
  #define WM831X_LDO_CONTROL       0
  #define WM831X_LDO_ON_CONTROL    1
  #define WM831X_LDO_SLEEP_CONTROL 2
  
  #define WM831X_ALIVE_LDO_ON_CONTROL    0
  #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1
  
  struct wm831x_ldo {
  	char name[WM831X_LDO_MAX_NAME];

  	char supply_name[WM831X_LDO_MAX_NAME];

  	struct regulator_desc desc;
  	int base;
  	struct wm831x *wm831x;
  	struct regulator_dev *regulator;
  };
  
  /*
   * Shared
   */

  static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
  {
  	struct wm831x_ldo *ldo = data;
  
  	regulator_notifier_call_chain(ldo->regulator,
  				      REGULATOR_EVENT_UNDER_VOLTAGE,
  				      NULL);
  
  	return IRQ_HANDLED;
  }
  
  /*
   * General purpose LDOs
   */

  static const struct regulator_linear_range wm831x_gp_ldo_ranges[] = {

  	REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000),
  	REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000),

  };

  
  static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
  					     int uV)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);

  	struct wm831x *wm831x = ldo->wm831x;
  	int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;

  	sel = regulator_map_voltage_linear_range(rdev, uV, uV);

  	if (sel < 0)
  		return sel;
  
  	return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel);

  }

  static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
  	struct wm831x *wm831x = ldo->wm831x;
  	int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
  	int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;

  	int ret;

  
  	ret = wm831x_reg_read(wm831x, on_reg);
  	if (ret < 0)

  		return ret;

  
  	if (!(ret & WM831X_LDO1_ON_MODE))
  		return REGULATOR_MODE_NORMAL;
  
  	ret = wm831x_reg_read(wm831x, ctrl_reg);
  	if (ret < 0)

  		return ret;

  
  	if (ret & WM831X_LDO1_LP_MODE)
  		return REGULATOR_MODE_STANDBY;
  	else
  		return REGULATOR_MODE_IDLE;
  }
  
  static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
  				  unsigned int mode)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
  	struct wm831x *wm831x = ldo->wm831x;
  	int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
  	int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
  	int ret;
  
  
  	switch (mode) {
  	case REGULATOR_MODE_NORMAL:
  		ret = wm831x_set_bits(wm831x, on_reg,
  				      WM831X_LDO1_ON_MODE, 0);
  		if (ret < 0)
  			return ret;
  		break;
  
  	case REGULATOR_MODE_IDLE:
  		ret = wm831x_set_bits(wm831x, ctrl_reg,

  				      WM831X_LDO1_LP_MODE, 0);

  		if (ret < 0)
  			return ret;
  
  		ret = wm831x_set_bits(wm831x, on_reg,
  				      WM831X_LDO1_ON_MODE,
  				      WM831X_LDO1_ON_MODE);
  		if (ret < 0)
  			return ret;

  		break;

  
  	case REGULATOR_MODE_STANDBY:
  		ret = wm831x_set_bits(wm831x, ctrl_reg,

  				      WM831X_LDO1_LP_MODE,
  				      WM831X_LDO1_LP_MODE);

  		if (ret < 0)
  			return ret;
  
  		ret = wm831x_set_bits(wm831x, on_reg,
  				      WM831X_LDO1_ON_MODE,
  				      WM831X_LDO1_ON_MODE);
  		if (ret < 0)
  			return ret;
  		break;
  
  	default:
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
  	struct wm831x *wm831x = ldo->wm831x;
  	int mask = 1 << rdev_get_id(rdev);
  	int ret;
  
  	/* Is the regulator on? */
  	ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
  	if (ret < 0)
  		return ret;
  	if (!(ret & mask))
  		return REGULATOR_STATUS_OFF;
  
  	/* Is it reporting under voltage? */
  	ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);

  	if (ret < 0)
  		return ret;

  	if (ret & mask)
  		return REGULATOR_STATUS_ERROR;
  
  	ret = wm831x_gp_ldo_get_mode(rdev);
  	if (ret < 0)
  		return ret;
  	else
  		return regulator_mode_to_status(ret);
  }
  
  static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
  						   int input_uV,
  						   int output_uV, int load_uA)
  {
  	if (load_uA < 20000)
  		return REGULATOR_MODE_STANDBY;
  	if (load_uA < 50000)
  		return REGULATOR_MODE_IDLE;
  	return REGULATOR_MODE_NORMAL;
  }

  static const struct regulator_ops wm831x_gp_ldo_ops = {

  	.list_voltage = regulator_list_voltage_linear_range,
  	.map_voltage = regulator_map_voltage_linear_range,

  	.get_voltage_sel = regulator_get_voltage_sel_regmap,

  	.set_voltage_sel = regulator_set_voltage_sel_regmap,

  	.set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
  	.get_mode = wm831x_gp_ldo_get_mode,
  	.set_mode = wm831x_gp_ldo_set_mode,
  	.get_status = wm831x_gp_ldo_get_status,
  	.get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,

  	.get_bypass = regulator_get_bypass_regmap,
  	.set_bypass = regulator_set_bypass_regmap,

  	.is_enabled = regulator_is_enabled_regmap,
  	.enable = regulator_enable_regmap,
  	.disable = regulator_disable_regmap,

  };

  static int wm831x_gp_ldo_probe(struct platform_device *pdev)

  {
  	struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);

  	struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);

  	struct regulator_config config = { };

  	int id;

  	struct wm831x_ldo *ldo;
  	struct resource *res;
  	int ret, irq;

  	if (pdata && pdata->wm831x_num)
  		id = (pdata->wm831x_num * 10) + 1;
  	else
  		id = 0;
  	id = pdev->id - id;

  	dev_dbg(&pdev->dev, "Probing LDO%d
  ", id + 1);

  	ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);

  	if (!ldo)

  		return -ENOMEM;

  
  	ldo->wm831x = wm831x;

  	res = platform_get_resource(pdev, IORESOURCE_REG, 0);

  	if (res == NULL) {

  		dev_err(&pdev->dev, "No REG resource
  ");

  		ret = -EINVAL;
  		goto err;
  	}
  	ldo->base = res->start;
  
  	snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
  	ldo->desc.name = ldo->name;

  
  	snprintf(ldo->supply_name, sizeof(ldo->supply_name),
  		 "LDO%dVDD", id + 1);
  	ldo->desc.supply_name = ldo->supply_name;

  	ldo->desc.id = id;
  	ldo->desc.type = REGULATOR_VOLTAGE;

  	ldo->desc.n_voltages = 32;

  	ldo->desc.ops = &wm831x_gp_ldo_ops;
  	ldo->desc.owner = THIS_MODULE;

  	ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
  	ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;

  	ldo->desc.enable_reg = WM831X_LDO_ENABLE;
  	ldo->desc.enable_mask = 1 << id;

  	ldo->desc.bypass_reg = ldo->base;
  	ldo->desc.bypass_mask = WM831X_LDO1_SWI;

  	ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
  	ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);

  	config.dev = pdev->dev.parent;

  	if (pdata)
  		config.init_data = pdata->ldo[id];

  	config.driver_data = ldo;

  	config.regmap = wm831x->regmap;

  	ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
  						 &config);

  	if (IS_ERR(ldo->regulator)) {
  		ret = PTR_ERR(ldo->regulator);
  		dev_err(wm831x->dev, "Failed to register LDO%d: %d
  ",
  			id + 1, ret);
  		goto err;
  	}

  	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));

  	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
  					wm831x_ldo_uv_irq,

  					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
  					ldo->name,

  					ldo);

  	if (ret != 0) {
  		dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d
  ",
  			irq, ret);

  		goto err;

  	}
  
  	platform_set_drvdata(pdev, ldo);
  
  	return 0;

  err:

  	return ret;
  }

  static struct platform_driver wm831x_gp_ldo_driver = {
  	.probe = wm831x_gp_ldo_probe,

  	.driver		= {
  		.name	= "wm831x-ldo",
  	},
  };
  
  /*
   * Analogue LDOs
   */

  static const struct regulator_linear_range wm831x_aldo_ranges[] = {

  	REGULATOR_LINEAR_RANGE(1000000, 0, 12, 50000),
  	REGULATOR_LINEAR_RANGE(1700000, 13, 31, 100000),

  };

  
  static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
  					     int uV)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);

  	struct wm831x *wm831x = ldo->wm831x;
  	int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;

  	sel = regulator_map_voltage_linear_range(rdev, uV, uV);

  	if (sel < 0)
  		return sel;

  	return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel);

  }

  static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
  	struct wm831x *wm831x = ldo->wm831x;
  	int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;

  	int ret;

  
  	ret = wm831x_reg_read(wm831x, on_reg);
  	if (ret < 0)
  		return 0;
  
  	if (ret & WM831X_LDO7_ON_MODE)
  		return REGULATOR_MODE_IDLE;
  	else
  		return REGULATOR_MODE_NORMAL;
  }
  
  static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
  				  unsigned int mode)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
  	struct wm831x *wm831x = ldo->wm831x;

  	int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
  	int ret;
  
  
  	switch (mode) {
  	case REGULATOR_MODE_NORMAL:

  		ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);

  		if (ret < 0)
  			return ret;
  		break;
  
  	case REGULATOR_MODE_IDLE:

  		ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,

  				      WM831X_LDO7_ON_MODE);
  		if (ret < 0)
  			return ret;
  		break;
  
  	default:
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  static int wm831x_aldo_get_status(struct regulator_dev *rdev)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
  	struct wm831x *wm831x = ldo->wm831x;
  	int mask = 1 << rdev_get_id(rdev);
  	int ret;
  
  	/* Is the regulator on? */
  	ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
  	if (ret < 0)
  		return ret;
  	if (!(ret & mask))
  		return REGULATOR_STATUS_OFF;
  
  	/* Is it reporting under voltage? */
  	ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);

  	if (ret < 0)
  		return ret;

  	if (ret & mask)
  		return REGULATOR_STATUS_ERROR;
  
  	ret = wm831x_aldo_get_mode(rdev);
  	if (ret < 0)
  		return ret;
  	else
  		return regulator_mode_to_status(ret);
  }

  static const struct regulator_ops wm831x_aldo_ops = {

  	.list_voltage = regulator_list_voltage_linear_range,
  	.map_voltage = regulator_map_voltage_linear_range,

  	.get_voltage_sel = regulator_get_voltage_sel_regmap,

  	.set_voltage_sel = regulator_set_voltage_sel_regmap,

  	.set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
  	.get_mode = wm831x_aldo_get_mode,
  	.set_mode = wm831x_aldo_set_mode,
  	.get_status = wm831x_aldo_get_status,

  	.set_bypass = regulator_set_bypass_regmap,
  	.get_bypass = regulator_get_bypass_regmap,

  	.is_enabled = regulator_is_enabled_regmap,
  	.enable = regulator_enable_regmap,
  	.disable = regulator_disable_regmap,

  };

  static int wm831x_aldo_probe(struct platform_device *pdev)

  {
  	struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);

  	struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);

  	struct regulator_config config = { };

  	int id;

  	struct wm831x_ldo *ldo;
  	struct resource *res;
  	int ret, irq;

  	if (pdata && pdata->wm831x_num)
  		id = (pdata->wm831x_num * 10) + 1;
  	else
  		id = 0;
  	id = pdev->id - id;

  	dev_dbg(&pdev->dev, "Probing LDO%d
  ", id + 1);

  	ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);

  	if (!ldo)

  		return -ENOMEM;

  
  	ldo->wm831x = wm831x;

  	res = platform_get_resource(pdev, IORESOURCE_REG, 0);

  	if (res == NULL) {

  		dev_err(&pdev->dev, "No REG resource
  ");

  		ret = -EINVAL;
  		goto err;
  	}
  	ldo->base = res->start;
  
  	snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
  	ldo->desc.name = ldo->name;

  
  	snprintf(ldo->supply_name, sizeof(ldo->supply_name),
  		 "LDO%dVDD", id + 1);
  	ldo->desc.supply_name = ldo->supply_name;

  	ldo->desc.id = id;
  	ldo->desc.type = REGULATOR_VOLTAGE;

  	ldo->desc.n_voltages = 32;
  	ldo->desc.linear_ranges = wm831x_aldo_ranges;
  	ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);

  	ldo->desc.ops = &wm831x_aldo_ops;
  	ldo->desc.owner = THIS_MODULE;

  	ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
  	ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;

  	ldo->desc.enable_reg = WM831X_LDO_ENABLE;
  	ldo->desc.enable_mask = 1 << id;

  	ldo->desc.bypass_reg = ldo->base;
  	ldo->desc.bypass_mask = WM831X_LDO7_SWI;

  	config.dev = pdev->dev.parent;

  	if (pdata)
  		config.init_data = pdata->ldo[id];

  	config.driver_data = ldo;

  	config.regmap = wm831x->regmap;

  	ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
  						 &config);

  	if (IS_ERR(ldo->regulator)) {
  		ret = PTR_ERR(ldo->regulator);
  		dev_err(wm831x->dev, "Failed to register LDO%d: %d
  ",
  			id + 1, ret);
  		goto err;
  	}

  	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));

  	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
  					wm831x_ldo_uv_irq,

  					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
  					ldo->name, ldo);

  	if (ret != 0) {
  		dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d
  ",
  			irq, ret);

  		goto err;

  	}
  
  	platform_set_drvdata(pdev, ldo);
  
  	return 0;

  err:

  	return ret;
  }

  static struct platform_driver wm831x_aldo_driver = {
  	.probe = wm831x_aldo_probe,

  	.driver		= {
  		.name	= "wm831x-aldo",
  	},
  };
  
  /*
   * Alive LDO
   */
  
  #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf

  static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
  					     int uV)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);

  	struct wm831x *wm831x = ldo->wm831x;
  	int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
  
  	sel = regulator_map_voltage_linear(rdev, uV, uV);
  	if (sel < 0)
  		return sel;

  	return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel);

  }

  static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
  {
  	struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
  	struct wm831x *wm831x = ldo->wm831x;
  	int mask = 1 << rdev_get_id(rdev);
  	int ret;
  
  	/* Is the regulator on? */
  	ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
  	if (ret < 0)
  		return ret;
  	if (ret & mask)
  		return REGULATOR_STATUS_ON;
  	else
  		return REGULATOR_STATUS_OFF;
  }

  static const struct regulator_ops wm831x_alive_ldo_ops = {

  	.list_voltage = regulator_list_voltage_linear,

  	.map_voltage = regulator_map_voltage_linear,

  	.get_voltage_sel = regulator_get_voltage_sel_regmap,

  	.set_voltage_sel = regulator_set_voltage_sel_regmap,

  	.set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
  	.get_status = wm831x_alive_ldo_get_status,

  	.is_enabled = regulator_is_enabled_regmap,
  	.enable = regulator_enable_regmap,
  	.disable = regulator_disable_regmap,

  };

  static int wm831x_alive_ldo_probe(struct platform_device *pdev)

  {
  	struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);

  	struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);

  	struct regulator_config config = { };

  	int id;

  	struct wm831x_ldo *ldo;
  	struct resource *res;
  	int ret;

  	if (pdata && pdata->wm831x_num)
  		id = (pdata->wm831x_num * 10) + 1;
  	else
  		id = 0;
  	id = pdev->id - id;

  	dev_dbg(&pdev->dev, "Probing LDO%d
  ", id + 1);

  	ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);

  	if (!ldo)

  		return -ENOMEM;

  
  	ldo->wm831x = wm831x;

  	res = platform_get_resource(pdev, IORESOURCE_REG, 0);

  	if (res == NULL) {

  		dev_err(&pdev->dev, "No REG resource
  ");

  		ret = -EINVAL;
  		goto err;
  	}
  	ldo->base = res->start;
  
  	snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
  	ldo->desc.name = ldo->name;

  
  	snprintf(ldo->supply_name, sizeof(ldo->supply_name),
  		 "LDO%dVDD", id + 1);
  	ldo->desc.supply_name = ldo->supply_name;

  	ldo->desc.id = id;
  	ldo->desc.type = REGULATOR_VOLTAGE;
  	ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
  	ldo->desc.ops = &wm831x_alive_ldo_ops;
  	ldo->desc.owner = THIS_MODULE;

  	ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
  	ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;

  	ldo->desc.enable_reg = WM831X_LDO_ENABLE;
  	ldo->desc.enable_mask = 1 << id;

  	ldo->desc.min_uV = 800000;
  	ldo->desc.uV_step = 50000;

  	ldo->desc.enable_time = 1000;

  	config.dev = pdev->dev.parent;

  	if (pdata)
  		config.init_data = pdata->ldo[id];

  	config.driver_data = ldo;

  	config.regmap = wm831x->regmap;

  	ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
  						 &config);

  	if (IS_ERR(ldo->regulator)) {
  		ret = PTR_ERR(ldo->regulator);
  		dev_err(wm831x->dev, "Failed to register LDO%d: %d
  ",
  			id + 1, ret);
  		goto err;
  	}
  
  	platform_set_drvdata(pdev, ldo);
  
  	return 0;
  
  err:

  	return ret;
  }

  static struct platform_driver wm831x_alive_ldo_driver = {
  	.probe = wm831x_alive_ldo_probe,

  	.driver		= {
  		.name	= "wm831x-alive-ldo",
  	},
  };

  static struct platform_driver * const drivers[] = {
  	&wm831x_gp_ldo_driver,
  	&wm831x_aldo_driver,
  	&wm831x_alive_ldo_driver,
  };

  static int __init wm831x_ldo_init(void)
  {

  	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));

  }
  subsys_initcall(wm831x_ldo_init);
  
  static void __exit wm831x_ldo_exit(void)
  {

  	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));

  }
  module_exit(wm831x_ldo_exit);
  
  /* Module information */
  MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
  MODULE_DESCRIPTION("WM831x LDO driver");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:wm831x-ldo");
  MODULE_ALIAS("platform:wm831x-aldo");
  MODULE_ALIAS("platform:wm831x-aliveldo");