[mirror_ubuntu-bionic-kernel.git] / drivers / regulator / wm8400-regulator.c

/*
 * Regulator support for WM8400
 *
 * Copyright 2008 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/bug.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/wm8400-private.h>

static int wm8400_ldo_is_enabled(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	u16 val;

	val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
	return (val & WM8400_LDO1_ENA) != 0;
}

static int wm8400_ldo_enable(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);

	return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
			       WM8400_LDO1_ENA, WM8400_LDO1_ENA);
}

static int wm8400_ldo_disable(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);

	return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
			       WM8400_LDO1_ENA, 0);
}

static int wm8400_ldo_list_voltage(struct regulator_dev *dev,
				   unsigned selector)
{
	if (selector > WM8400_LDO1_VSEL_MASK)
		return -EINVAL;

	if (selector < 15)
		return 900000 + (selector * 50000);
	else
		return 1600000 + ((selector - 14) * 100000);
}

static int wm8400_ldo_get_voltage_sel(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	u16 val;

	val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
	val &= WM8400_LDO1_VSEL_MASK;

	return val;
}

static int wm8400_ldo_set_voltage(struct regulator_dev *dev,
				  int min_uV, int max_uV, unsigned *selector)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	u16 val;

	if (min_uV < 900000 || min_uV > 3300000)
		return -EINVAL;

	if (min_uV < 1700000) {
		/* Steps of 50mV from 900mV;  */
		val = (min_uV - 850001) / 50000;

		if ((val * 50000) + 900000 > max_uV)
			return -EINVAL;
		BUG_ON((val * 50000) + 900000 < min_uV);
	} else {
		/* Steps of 100mV from 1700mV */
		val = ((min_uV - 1600001) / 100000);

		if ((val * 100000) + 1700000 > max_uV)
			return -EINVAL;
		BUG_ON((val * 100000) + 1700000 < min_uV);

		val += 0xf;
	}

	*selector = val;

	return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
			       WM8400_LDO1_VSEL_MASK, val);
}

static struct regulator_ops wm8400_ldo_ops = {
	.is_enabled = wm8400_ldo_is_enabled,
	.enable = wm8400_ldo_enable,
	.disable = wm8400_ldo_disable,
	.list_voltage = wm8400_ldo_list_voltage,
	.get_voltage_sel = wm8400_ldo_get_voltage_sel,
	.set_voltage = wm8400_ldo_set_voltage,
};

static int wm8400_dcdc_is_enabled(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	u16 val;

	val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
	return (val & WM8400_DC1_ENA) != 0;
}

static int wm8400_dcdc_enable(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;

	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
			       WM8400_DC1_ENA, WM8400_DC1_ENA);
}

static int wm8400_dcdc_disable(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;

	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
			       WM8400_DC1_ENA, 0);
}

static int wm8400_dcdc_list_voltage(struct regulator_dev *dev,
				    unsigned selector)
{
	if (selector > WM8400_DC1_VSEL_MASK)
		return -EINVAL;

	return 850000 + (selector * 25000);
}

static int wm8400_dcdc_get_voltage_sel(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	u16 val;
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;

	val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
	val &= WM8400_DC1_VSEL_MASK;

	return val;
}

static int wm8400_dcdc_set_voltage(struct regulator_dev *dev,
				   int min_uV, int max_uV, unsigned *selector)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	u16 val;
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;

	if (min_uV < 850000)
		return -EINVAL;

	val = (min_uV - 825001) / 25000;

	if (850000 + (25000 * val) > max_uV)
		return -EINVAL;
	BUG_ON(850000 + (25000 * val) < min_uV);

	*selector = val;

	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
			       WM8400_DC1_VSEL_MASK, val);
}

static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	u16 data[2];
	int ret;

	ret = wm8400_block_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset, 2,
				data);
	if (ret != 0)
		return 0;

	/* Datasheet: hibernate */
	if (data[0] & WM8400_DC1_SLEEP)
		return REGULATOR_MODE_STANDBY;

	/* Datasheet: standby */
	if (!(data[0] & WM8400_DC1_ACTIVE))
		return REGULATOR_MODE_IDLE;

	/* Datasheet: active with or without force PWM */
	if (data[1] & WM8400_DC1_FRC_PWM)
		return REGULATOR_MODE_FAST;
	else
		return REGULATOR_MODE_NORMAL;
}

static int wm8400_dcdc_set_mode(struct regulator_dev *dev, unsigned int mode)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	int ret;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		/* Datasheet: active with force PWM */
		ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
				      WM8400_DC1_FRC_PWM, WM8400_DC1_FRC_PWM);
		if (ret != 0)
			return ret;

		return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
				       WM8400_DC1_ACTIVE | WM8400_DC1_SLEEP,
				       WM8400_DC1_ACTIVE);

	case REGULATOR_MODE_NORMAL:
		/* Datasheet: active */
		ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
				      WM8400_DC1_FRC_PWM, 0);
		if (ret != 0)
			return ret;

		return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
				       WM8400_DC1_ACTIVE | WM8400_DC1_SLEEP,
				       WM8400_DC1_ACTIVE);

	case REGULATOR_MODE_IDLE:
		/* Datasheet: standby */
		ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
				      WM8400_DC1_ACTIVE, 0);
		if (ret != 0)
			return ret;
		return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
				       WM8400_DC1_SLEEP, 0);

	default:
		return -EINVAL;
	}
}

static unsigned int wm8400_dcdc_get_optimum_mode(struct regulator_dev *dev,
						 int input_uV, int output_uV,
						 int load_uA)
{
	return REGULATOR_MODE_NORMAL;
}

static struct regulator_ops wm8400_dcdc_ops = {
	.is_enabled = wm8400_dcdc_is_enabled,
	.enable = wm8400_dcdc_enable,
	.disable = wm8400_dcdc_disable,
	.list_voltage = wm8400_dcdc_list_voltage,
	.get_voltage_sel = wm8400_dcdc_get_voltage_sel,
	.set_voltage = wm8400_dcdc_set_voltage,
	.get_mode = wm8400_dcdc_get_mode,
	.set_mode = wm8400_dcdc_set_mode,
	.get_optimum_mode = wm8400_dcdc_get_optimum_mode,
};

static struct regulator_desc regulators[] = {
	{
		.name = "LDO1",
		.id = WM8400_LDO1,
		.ops = &wm8400_ldo_ops,
		.n_voltages = WM8400_LDO1_VSEL_MASK + 1,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO2",
		.id = WM8400_LDO2,
		.ops = &wm8400_ldo_ops,
		.n_voltages = WM8400_LDO2_VSEL_MASK + 1,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO3",
		.id = WM8400_LDO3,
		.ops = &wm8400_ldo_ops,
		.n_voltages = WM8400_LDO3_VSEL_MASK + 1,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO4",
		.id = WM8400_LDO4,
		.ops = &wm8400_ldo_ops,
		.n_voltages = WM8400_LDO4_VSEL_MASK + 1,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "DCDC1",
		.id = WM8400_DCDC1,
		.ops = &wm8400_dcdc_ops,
		.n_voltages = WM8400_DC1_VSEL_MASK + 1,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "DCDC2",
		.id = WM8400_DCDC2,
		.ops = &wm8400_dcdc_ops,
		.n_voltages = WM8400_DC2_VSEL_MASK + 1,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
};

static int __devinit wm8400_regulator_probe(struct platform_device *pdev)
{
	struct wm8400 *wm8400 = container_of(pdev, struct wm8400, regulators[pdev->id]);
	struct regulator_dev *rdev;

	rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
				  pdev->dev.platform_data, wm8400, NULL);

	if (IS_ERR(rdev))
		return PTR_ERR(rdev);

	platform_set_drvdata(pdev, rdev);

	return 0;
}

static int __devexit wm8400_regulator_remove(struct platform_device *pdev)
{
	struct regulator_dev *rdev = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);
	regulator_unregister(rdev);

	return 0;
}

static struct platform_driver wm8400_regulator_driver = {
	.driver = {
		.name = "wm8400-regulator",
	},
	.probe = wm8400_regulator_probe,
	.remove = __devexit_p(wm8400_regulator_remove),
};

/**
 * wm8400_register_regulator - enable software control of a WM8400 regulator
 *
 * This function enables software control of a WM8400 regulator via
 * the regulator API.  It is intended to be called from the
 * platform_init() callback of the WM8400 MFD driver.
 *
 * @param dev      The WM8400 device to operate on.
 * @param reg      The regulator to control.
 * @param initdata Regulator initdata for the regulator.
 */
int wm8400_register_regulator(struct device *dev, int reg,
			      struct regulator_init_data *initdata)
{
	struct wm8400 *wm8400 = dev_get_drvdata(dev);

	if (wm8400->regulators[reg].name)
		return -EBUSY;

	initdata->driver_data = wm8400;

	wm8400->regulators[reg].name = "wm8400-regulator";
	wm8400->regulators[reg].id = reg;
	wm8400->regulators[reg].dev.parent = dev;
	wm8400->regulators[reg].dev.platform_data = initdata;

	return platform_device_register(&wm8400->regulators[reg]);
}
EXPORT_SYMBOL_GPL(wm8400_register_regulator);

static int __init wm8400_regulator_init(void)
{
	return platform_driver_register(&wm8400_regulator_driver);
}
subsys_initcall(wm8400_regulator_init);

static void __exit wm8400_regulator_exit(void)
{
	platform_driver_unregister(&wm8400_regulator_driver);
}
module_exit(wm8400_regulator_exit);

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM8400 regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8400-regulator");
Commit	Line	Data
42fad570 MB	1	/*
	2	* Regulator support for WM8400
	3	*
	4	* Copyright 2008 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of the
	11	* License, or (at your option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/bug.h>
	16	#include <linux/err.h>
	17	#include <linux/kernel.h>
65602c32	18	#include <linux/module.h>
42fad570 MB	19	#include <linux/regulator/driver.h>
	20	#include <linux/mfd/wm8400-private.h>
	21
	22	static int wm8400_ldo_is_enabled(struct regulator_dev *dev)
	23	{
	24	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	25	u16 val;
	26
	27	val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
	28	return (val & WM8400_LDO1_ENA) != 0;
	29	}
	30
	31	static int wm8400_ldo_enable(struct regulator_dev *dev)
	32	{
	33	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	34
	35	return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
	36	WM8400_LDO1_ENA, WM8400_LDO1_ENA);
	37	}
	38
	39	static int wm8400_ldo_disable(struct regulator_dev *dev)
	40	{
	41	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	42
	43	return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
	44	WM8400_LDO1_ENA, 0);
	45	}
	46
216765d9 MB	47	static int wm8400_ldo_list_voltage(struct regulator_dev *dev,
	48	unsigned selector)
	49	{
	50	if (selector > WM8400_LDO1_VSEL_MASK)
	51	return -EINVAL;
	52
	53	if (selector < 15)
	54	return 900000 + (selector * 50000);
	55	else
	56	return 1600000 + ((selector - 14) * 100000);
	57	}
	58
7ce8a2a0	59	static int wm8400_ldo_get_voltage_sel(struct regulator_dev *dev)
42fad570 MB	60	{
	61	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	62	u16 val;
	63
	64	val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
	65	val &= WM8400_LDO1_VSEL_MASK;
	66
7ce8a2a0	67	return val;
42fad570 MB	68	}
	69
	70	static int wm8400_ldo_set_voltage(struct regulator_dev *dev,
3a93f2a9	71	int min_uV, int max_uV, unsigned *selector)
42fad570 MB	72	{
	73	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	74	u16 val;
	75
	76	if (min_uV < 900000 \|\| min_uV > 3300000)
	77	return -EINVAL;
	78
	79	if (min_uV < 1700000) {
	80	/* Steps of 50mV from 900mV; */
	81	val = (min_uV - 850001) / 50000;
	82
	83	if ((val * 50000) + 900000 > max_uV)
	84	return -EINVAL;
	85	BUG_ON((val * 50000) + 900000 < min_uV);
	86	} else {
	87	/* Steps of 100mV from 1700mV */
	88	val = ((min_uV - 1600001) / 100000);
	89
	90	if ((val * 100000) + 1700000 > max_uV)
	91	return -EINVAL;
	92	BUG_ON((val * 100000) + 1700000 < min_uV);
	93
	94	val += 0xf;
	95	}
	96
3a93f2a9 MB	97	*selector = val;
3a93f2a9 MB	98
42fad570 MB	99	return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
	100	WM8400_LDO1_VSEL_MASK, val);
	101	}
	102
	103	static struct regulator_ops wm8400_ldo_ops = {
	104	.is_enabled = wm8400_ldo_is_enabled,
	105	.enable = wm8400_ldo_enable,
	106	.disable = wm8400_ldo_disable,
216765d9	107	.list_voltage = wm8400_ldo_list_voltage,
7ce8a2a0	108	.get_voltage_sel = wm8400_ldo_get_voltage_sel,
42fad570 MB	109	.set_voltage = wm8400_ldo_set_voltage,
	110	};
	111
	112	static int wm8400_dcdc_is_enabled(struct regulator_dev *dev)
	113	{
	114	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	115	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	116	u16 val;
	117
	118	val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
	119	return (val & WM8400_DC1_ENA) != 0;
	120	}
	121
	122	static int wm8400_dcdc_enable(struct regulator_dev *dev)
	123	{
	124	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	125	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	126
	127	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	128	WM8400_DC1_ENA, WM8400_DC1_ENA);
	129	}
	130
	131	static int wm8400_dcdc_disable(struct regulator_dev *dev)
	132	{
	133	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	134	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	135
	136	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	137	WM8400_DC1_ENA, 0);
	138	}
	139
216765d9 MB	140	static int wm8400_dcdc_list_voltage(struct regulator_dev *dev,
	141	unsigned selector)
	142	{
	143	if (selector > WM8400_DC1_VSEL_MASK)
	144	return -EINVAL;
	145
	146	return 850000 + (selector * 25000);
	147	}
	148
7ce8a2a0	149	static int wm8400_dcdc_get_voltage_sel(struct regulator_dev *dev)
42fad570 MB	150	{
	151	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	152	u16 val;
	153	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	154
	155	val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
	156	val &= WM8400_DC1_VSEL_MASK;
	157
7ce8a2a0	158	return val;
42fad570 MB	159	}
	160
	161	static int wm8400_dcdc_set_voltage(struct regulator_dev *dev,
3a93f2a9	162	int min_uV, int max_uV, unsigned *selector)
42fad570 MB	163	{
	164	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	165	u16 val;
	166	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	167
	168	if (min_uV < 850000)
	169	return -EINVAL;
	170
	171	val = (min_uV - 825001) / 25000;
	172
	173	if (850000 + (25000 * val) > max_uV)
	174	return -EINVAL;
	175	BUG_ON(850000 + (25000 * val) < min_uV);
	176
3a93f2a9 MB	177	*selector = val;
3a93f2a9 MB	178
42fad570 MB	179	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	180	WM8400_DC1_VSEL_MASK, val);
	181	}
	182
	183	static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
	184	{
	185	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	186	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	187	u16 data[2];
	188	int ret;
	189
	190	ret = wm8400_block_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset, 2,
	191	data);
	192	if (ret != 0)
	193	return 0;
	194
	195	/* Datasheet: hibernate */
	196	if (data[0] & WM8400_DC1_SLEEP)
	197	return REGULATOR_MODE_STANDBY;
	198
	199	/* Datasheet: standby */
	200	if (!(data[0] & WM8400_DC1_ACTIVE))
	201	return REGULATOR_MODE_IDLE;
	202
	203	/* Datasheet: active with or without force PWM */
	204	if (data[1] & WM8400_DC1_FRC_PWM)
	205	return REGULATOR_MODE_FAST;
	206	else
	207	return REGULATOR_MODE_NORMAL;
	208	}
	209
	210	static int wm8400_dcdc_set_mode(struct regulator_dev *dev, unsigned int mode)
	211	{
	212	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	213	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	214	int ret;
	215
	216	switch (mode) {
	217	case REGULATOR_MODE_FAST:
	218	/* Datasheet: active with force PWM */
	219	ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
	220	WM8400_DC1_FRC_PWM, WM8400_DC1_FRC_PWM);
	221	if (ret != 0)
	222	return ret;
	223
	224	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	225	WM8400_DC1_ACTIVE \| WM8400_DC1_SLEEP,
	226	WM8400_DC1_ACTIVE);
	227
	228	case REGULATOR_MODE_NORMAL:
	229	/* Datasheet: active */
	230	ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
	231	WM8400_DC1_FRC_PWM, 0);
	232	if (ret != 0)
	233	return ret;
	234
	235	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	236	WM8400_DC1_ACTIVE \| WM8400_DC1_SLEEP,
	237	WM8400_DC1_ACTIVE);
	238
	239	case REGULATOR_MODE_IDLE:
	240	/* Datasheet: standby */
	241	ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	242	WM8400_DC1_ACTIVE, 0);
243	if (ret != 0)
244	return ret;
245	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
246	WM8400_DC1_SLEEP, 0);
247
248	default:
249	return -EINVAL;
250	}
251	}
252
253	static unsigned int wm8400_dcdc_get_optimum_mode(struct regulator_dev *dev,
254	int input_uV, int output_uV,
255	int load_uA)
256	{
257	return REGULATOR_MODE_NORMAL;
258	}
259
260	static struct regulator_ops wm8400_dcdc_ops = {
261	.is_enabled = wm8400_dcdc_is_enabled,
262	.enable = wm8400_dcdc_enable,
263	.disable = wm8400_dcdc_disable,
216765d9	264	.list_voltage = wm8400_dcdc_list_voltage,
7ce8a2a0	265	.get_voltage_sel = wm8400_dcdc_get_voltage_sel,
42fad570 MB	266	.set_voltage = wm8400_dcdc_set_voltage,
	267	.get_mode = wm8400_dcdc_get_mode,
	268	.set_mode = wm8400_dcdc_set_mode,
	269	.get_optimum_mode = wm8400_dcdc_get_optimum_mode,
	270	};
	271
	272	static struct regulator_desc regulators[] = {
	273	{
	274	.name = "LDO1",
	275	.id = WM8400_LDO1,
	276	.ops = &wm8400_ldo_ops,
216765d9	277	.n_voltages = WM8400_LDO1_VSEL_MASK + 1,
42fad570 MB	278	.type = REGULATOR_VOLTAGE,
	279	.owner = THIS_MODULE,
	280	},
	281	{
	282	.name = "LDO2",
	283	.id = WM8400_LDO2,
	284	.ops = &wm8400_ldo_ops,
216765d9	285	.n_voltages = WM8400_LDO2_VSEL_MASK + 1,
42fad570 MB	286	.type = REGULATOR_VOLTAGE,
	287	.owner = THIS_MODULE,
	288	},
	289	{
	290	.name = "LDO3",
	291	.id = WM8400_LDO3,
	292	.ops = &wm8400_ldo_ops,
216765d9	293	.n_voltages = WM8400_LDO3_VSEL_MASK + 1,
42fad570 MB	294	.type = REGULATOR_VOLTAGE,
	295	.owner = THIS_MODULE,
	296	},
	297	{
	298	.name = "LDO4",
	299	.id = WM8400_LDO4,
	300	.ops = &wm8400_ldo_ops,
216765d9	301	.n_voltages = WM8400_LDO4_VSEL_MASK + 1,
42fad570 MB	302	.type = REGULATOR_VOLTAGE,
	303	.owner = THIS_MODULE,
	304	},
	305	{
	306	.name = "DCDC1",
	307	.id = WM8400_DCDC1,
	308	.ops = &wm8400_dcdc_ops,
216765d9	309	.n_voltages = WM8400_DC1_VSEL_MASK + 1,
42fad570 MB	310	.type = REGULATOR_VOLTAGE,
	311	.owner = THIS_MODULE,
	312	},
	313	{
	314	.name = "DCDC2",
	315	.id = WM8400_DCDC2,
	316	.ops = &wm8400_dcdc_ops,
216765d9	317	.n_voltages = WM8400_DC2_VSEL_MASK + 1,
42fad570 MB	318	.type = REGULATOR_VOLTAGE,
	319	.owner = THIS_MODULE,
	320	},
	321	};
	322
5dbdf735	323	static int __devinit wm8400_regulator_probe(struct platform_device *pdev)
42fad570	324	{
1ad02bbc	325	struct wm8400 *wm8400 = container_of(pdev, struct wm8400, regulators[pdev->id]);
42fad570 MB	326	struct regulator_dev *rdev;
	327
	328	rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
2c043bcb	329	pdev->dev.platform_data, wm8400, NULL);
42fad570 MB	330
	331	if (IS_ERR(rdev))
	332	return PTR_ERR(rdev);
	333
1ad02bbc DT	334	platform_set_drvdata(pdev, rdev);
1ad02bbc DT	335
42fad570 MB	336	return 0;
	337	}
	338
	339	static int __devexit wm8400_regulator_remove(struct platform_device *pdev)
	340	{
	341	struct regulator_dev *rdev = platform_get_drvdata(pdev);
	342
1ad02bbc	343	platform_set_drvdata(pdev, NULL);
42fad570 MB	344	regulator_unregister(rdev);
	345
	346	return 0;
	347	}
	348
	349	static struct platform_driver wm8400_regulator_driver = {
	350	.driver = {
	351	.name = "wm8400-regulator",
	352	},
	353	.probe = wm8400_regulator_probe,
	354	.remove = __devexit_p(wm8400_regulator_remove),
	355	};
	356
	357	/**
	358	* wm8400_register_regulator - enable software control of a WM8400 regulator
	359	*
	360	* This function enables software control of a WM8400 regulator via
	361	* the regulator API. It is intended to be called from the
	362	* platform_init() callback of the WM8400 MFD driver.
	363	*
	364	* @param dev The WM8400 device to operate on.
	365	* @param reg The regulator to control.
	366	* @param initdata Regulator initdata for the regulator.
	367	*/
	368	int wm8400_register_regulator(struct device *dev, int reg,
	369	struct regulator_init_data *initdata)
	370	{
1909e2f6	371	struct wm8400 *wm8400 = dev_get_drvdata(dev);
42fad570 MB	372
	373	if (wm8400->regulators[reg].name)
	374	return -EBUSY;
	375
	376	initdata->driver_data = wm8400;
	377
	378	wm8400->regulators[reg].name = "wm8400-regulator";
	379	wm8400->regulators[reg].id = reg;
	380	wm8400->regulators[reg].dev.parent = dev;
42fad570 MB	381	wm8400->regulators[reg].dev.platform_data = initdata;
	382
	383	return platform_device_register(&wm8400->regulators[reg]);
	384	}
	385	EXPORT_SYMBOL_GPL(wm8400_register_regulator);
	386
	387	static int __init wm8400_regulator_init(void)
	388	{
	389	return platform_driver_register(&wm8400_regulator_driver);
	390	}
5a1b22be	391	subsys_initcall(wm8400_regulator_init);
42fad570 MB	392
	393	static void __exit wm8400_regulator_exit(void)
	394	{
	395	platform_driver_unregister(&wm8400_regulator_driver);
	396	}
	397	module_exit(wm8400_regulator_exit);
	398
	399	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	400	MODULE_DESCRIPTION("WM8400 regulator driver");
	401	MODULE_LICENSE("GPL");
	402	MODULE_ALIAS("platform:wm8400-regulator");