[net-next-2.6.git] / drivers / regulator / ab8500.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License v2
 *
 * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
 *
 * AB8500 peripheral regulators
 *
 * AB8500 supports the following regulators,
 * LDOs - VAUDIO, VANAMIC2/2, VDIGMIC, VINTCORE12, VTVOUT,
 *        VAUX1/2/3, VANA
 *
 * for DB8500 cut 1.0 and previous versions of the silicon, all accesses
 * to registers are through the DB8500 SPI. In cut 1.1 onwards, these
 * accesses are through the DB8500 PRCMU I2C
 *
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mfd/ab8500.h>
#include <linux/mfd/abx500.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/ab8500.h>

/**
 * struct ab8500_regulator_info - ab8500 regulator information
 * @desc: regulator description
 * @ab8500: ab8500 parent
 * @regulator_dev: regulator device
 * @max_uV: maximum voltage (for variable voltage supplies)
 * @min_uV: minimum voltage (for variable voltage supplies)
 * @fixed_uV: typical voltage (for fixed voltage supplies)
 * @update_bank: bank to control on/off
 * @update_reg: register to control on/off
 * @mask: mask to enable/disable regulator
 * @enable: bits to enable the regulator in normal(high power) mode
 * @voltage_bank: bank to control regulator voltage
 * @voltage_reg: register to control regulator voltage
 * @voltage_mask: mask to control regulator voltage
 * @supported_voltages: supported voltage table
 * @voltages_len: number of supported voltages for the regulator
 */
struct ab8500_regulator_info {
	struct device		*dev;
	struct regulator_desc	desc;
	struct ab8500		*ab8500;
	struct regulator_dev	*regulator;
	int max_uV;
	int min_uV;
	int fixed_uV;
	u8 update_bank;
	u8 update_reg;
	u8 mask;
	u8 enable;
	u8 voltage_bank;
	u8 voltage_reg;
	u8 voltage_mask;
	int const *supported_voltages;
	int voltages_len;
};

/* voltage tables for the vauxn/vintcore supplies */
static const int ldo_vauxn_voltages[] = {
	1100000,
	1200000,
	1300000,
	1400000,
	1500000,
	1800000,
	1850000,
	1900000,
	2500000,
	2650000,
	2700000,
	2750000,
	2800000,
	2900000,
	3000000,
	3300000,
};

static const int ldo_vintcore_voltages[] = {
	1200000,
	1225000,
	1250000,
	1275000,
	1300000,
	1325000,
	1350000,
};

static int ab8500_regulator_enable(struct regulator_dev *rdev)
{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
		return -EINVAL;

	ret = abx500_mask_and_set_register_interruptible(info->dev,
		info->update_bank, info->update_reg, info->mask, info->enable);
	if (ret < 0)
		dev_err(rdev_get_dev(rdev),
			"couldn't set enable bits for regulator\n");
	return ret;
}

static int ab8500_regulator_disable(struct regulator_dev *rdev)
{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
		return -EINVAL;

	ret = abx500_mask_and_set_register_interruptible(info->dev,
		info->update_bank, info->update_reg, info->mask, 0x0);
	if (ret < 0)
		dev_err(rdev_get_dev(rdev),
			"couldn't set disable bits for regulator\n");
	return ret;
}

static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	u8 value;

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
		return -EINVAL;

	ret = abx500_get_register_interruptible(info->dev,
		info->update_bank, info->update_reg, &value);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev),
			"couldn't read 0x%x register\n", info->update_reg);
		return ret;
	}

	if (value & info->mask)
		return true;
	else
		return false;
}

static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
{
	int regulator_id;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
		return -EINVAL;

	/* return the uV for the fixed regulators */
	if (info->fixed_uV)
		return info->fixed_uV;

	if (selector >= info->voltages_len)
		return -EINVAL;

	return info->supported_voltages[selector];
}

static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	u8 value;

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
		return -EINVAL;

	ret = abx500_get_register_interruptible(info->dev, info->voltage_bank,
		info->voltage_reg, &value);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev),
			"couldn't read voltage reg for regulator\n");
		return ret;
	}

	/* vintcore has a different layout */
	value &= info->voltage_mask;
	if (regulator_id == AB8500_LDO_INTCORE)
		ret = info->supported_voltages[value >> 0x3];
	else
		ret = info->supported_voltages[value];

	return ret;
}

static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
		int min_uV, int max_uV)
{
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	int i;

	/* check the supported voltage */
	for (i = 0; i < info->voltages_len; i++) {
		if ((info->supported_voltages[i] >= min_uV) &&
		    (info->supported_voltages[i] <= max_uV))
			return i;
	}

	return -EINVAL;
}

static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
		int min_uV, int max_uV)
{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
		return -EINVAL;

	/* get the appropriate voltages within the range */
	ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev),
				"couldn't get best voltage for regulator\n");
		return ret;
	}

	/* set the registers for the request */
	ret = abx500_mask_and_set_register_interruptible(info->dev,
		info->voltage_bank, info->voltage_reg,
		info->voltage_mask, (u8)ret);
	if (ret < 0)
		dev_err(rdev_get_dev(rdev),
		"couldn't set voltage reg for regulator\n");

	return ret;
}

static struct regulator_ops ab8500_regulator_ops = {
	.enable		= ab8500_regulator_enable,
	.disable	= ab8500_regulator_disable,
	.is_enabled	= ab8500_regulator_is_enabled,
	.get_voltage	= ab8500_regulator_get_voltage,
	.set_voltage	= ab8500_regulator_set_voltage,
	.list_voltage	= ab8500_list_voltage,
};

static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
{
	int regulator_id;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
		return -EINVAL;

	return info->fixed_uV;
}

static struct regulator_ops ab8500_ldo_fixed_ops = {
	.enable		= ab8500_regulator_enable,
	.disable	= ab8500_regulator_disable,
	.is_enabled	= ab8500_regulator_is_enabled,
	.get_voltage	= ab8500_fixed_get_voltage,
	.list_voltage	= ab8500_list_voltage,
};

#define AB8500_LDO(_id, min, max, bank, reg, reg_mask,		\
		reg_enable, volt_bank, volt_reg, volt_mask,	\
		voltages, len_volts)				\
{								\
	.desc	= {						\
		.name	= "LDO-" #_id,				\
		.ops	= &ab8500_regulator_ops,		\
		.type	= REGULATOR_VOLTAGE,			\
		.id	= AB8500_LDO_##_id,			\
		.owner	= THIS_MODULE,				\
	},							\
	.min_uV		= (min) * 1000,				\
	.max_uV		= (max) * 1000,				\
	.update_bank	= bank,					\
	.update_reg	= reg,					\
	.mask		= reg_mask,				\
	.enable		= reg_enable,				\
	.voltage_bank	= volt_bank,				\
	.voltage_reg	= volt_reg,				\
	.voltage_mask	= volt_mask,				\
	.supported_voltages = voltages,				\
	.voltages_len	= len_volts,				\
	.fixed_uV	= 0,					\
}

#define AB8500_FIXED_LDO(_id, fixed, bank, reg,		\
			reg_mask, reg_enable)		\
{							\
	.desc	= {					\
		.name	= "LDO-" #_id,			\
		.ops	= &ab8500_ldo_fixed_ops,	\
		.type	= REGULATOR_VOLTAGE,		\
		.id	= AB8500_LDO_##_id,		\
		.owner	= THIS_MODULE,			\
	},						\
	.fixed_uV	= fixed * 1000,			\
	.update_bank	= bank,				\
	.update_reg	= reg,				\
	.mask		= reg_mask,			\
	.enable		= reg_enable,			\
}

static struct ab8500_regulator_info ab8500_regulator_info[] = {
	/*
	 * Variable Voltage LDOs
	 * name, min uV, max uV, ctrl bank, ctrl reg, reg mask, enable mask,
	 *      volt ctrl bank, volt ctrl reg, volt ctrl mask, volt table,
	 *      num supported volts
	 */
	AB8500_LDO(AUX1, 1100, 3300, 0x04, 0x09, 0x3, 0x1, 0x04, 0x1f, 0xf,
			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(AUX2, 1100, 3300, 0x04, 0x09, 0xc, 0x4, 0x04, 0x20, 0xf,
			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(AUX3, 1100, 3300, 0x04, 0x0a, 0x3, 0x1, 0x04, 0x21, 0xf,
			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(INTCORE, 1100, 3300, 0x03, 0x80, 0x4, 0x4, 0x03, 0x80, 0x38,
		ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)),

	/*
	 * Fixed Voltage LDOs
	 *		 name,	o/p uV, ctrl bank, ctrl reg, enable, disable
	 */
	AB8500_FIXED_LDO(TVOUT,	  2000, 0x03,      0x80,     0x2,    0x2),
	AB8500_FIXED_LDO(AUDIO,   2000, 0x03,      0x83,     0x2,    0x2),
	AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03,      0x83,     0x4,    0x4),
	AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03,      0x83,     0x8,    0x8),
	AB8500_FIXED_LDO(DMIC,    1800, 0x03,      0x83,     0x10,   0x10),
	AB8500_FIXED_LDO(ANA,     1200, 0x03,      0x83,     0xc,    0x4),
};

static inline struct ab8500_regulator_info *find_regulator_info(int id)
{
	struct ab8500_regulator_info *info;
	int i;

	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
		info = &ab8500_regulator_info[i];
		if (info->desc.id == id)
			return info;
	}
	return NULL;
}

static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
{
	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
	struct ab8500_platform_data *pdata;
	int i, err;

	if (!ab8500) {
		dev_err(&pdev->dev, "null mfd parent\n");
		return -EINVAL;
	}
	pdata = dev_get_platdata(ab8500->dev);

	/* register all regulators */
	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
		struct ab8500_regulator_info *info = NULL;

		/* assign per-regulator data */
		info = &ab8500_regulator_info[i];
		info->dev = &pdev->dev;
		info->ab8500 = ab8500;

		info->regulator = regulator_register(&info->desc, &pdev->dev,
				pdata->regulator[i], info);
		if (IS_ERR(info->regulator)) {
			err = PTR_ERR(info->regulator);
			dev_err(&pdev->dev, "failed to register regulator %s\n",
					info->desc.name);
			/* when we fail, un-register all earlier regulators */
			while (--i >= 0) {
				info = &ab8500_regulator_info[i];
				regulator_unregister(info->regulator);
			}
			return err;
		}
	}

	return 0;
}

static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
		struct ab8500_regulator_info *info = NULL;
		info = &ab8500_regulator_info[i];
		regulator_unregister(info->regulator);
	}

	return 0;
}

static struct platform_driver ab8500_regulator_driver = {
	.probe = ab8500_regulator_probe,
	.remove = __devexit_p(ab8500_regulator_remove),
	.driver         = {
		.name   = "ab8500-regulator",
		.owner  = THIS_MODULE,
	},
};

static int __init ab8500_regulator_init(void)
{
	int ret;

	ret = platform_driver_register(&ab8500_regulator_driver);
	if (ret != 0)
		pr_err("Failed to register ab8500 regulator: %d\n", ret);

	return ret;
}
subsys_initcall(ab8500_regulator_init);

static void __exit ab8500_regulator_exit(void)
{
	platform_driver_unregister(&ab8500_regulator_driver);
}
module_exit(ab8500_regulator_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
MODULE_ALIAS("platform:ab8500-regulator");
Commit	Line	Data
c789ca20 SI	1	/*
	2	* Copyright (C) ST-Ericsson SA 2010
	3	*
	4	* License Terms: GNU General Public License v2
	5	*
	6	* Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
	7	*
	8	* AB8500 peripheral regulators
	9	*
	10	* AB8500 supports the following regulators,
	11	* LDOs - VAUDIO, VANAMIC2/2, VDIGMIC, VINTCORE12, VTVOUT,
	12	* VAUX1/2/3, VANA
	13	*
	14	* for DB8500 cut 1.0 and previous versions of the silicon, all accesses
	15	* to registers are through the DB8500 SPI. In cut 1.1 onwards, these
	16	* accesses are through the DB8500 PRCMU I2C
	17	*
	18	*/
	19	#include <linux/init.h>
	20	#include <linux/kernel.h>
	21	#include <linux/err.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/mfd/ab8500.h>
47c16975	24	#include <linux/mfd/abx500.h>
c789ca20 SI	25	#include <linux/regulator/driver.h>
	26	#include <linux/regulator/machine.h>
	27	#include <linux/regulator/ab8500.h>
	28
	29	/**
	30	* struct ab8500_regulator_info - ab8500 regulator information
	31	* @desc: regulator description
	32	* @ab8500: ab8500 parent
	33	* @regulator_dev: regulator device
	34	* @max_uV: maximum voltage (for variable voltage supplies)
	35	* @min_uV: minimum voltage (for variable voltage supplies)
	36	* @fixed_uV: typical voltage (for fixed voltage supplies)
47c16975	37	* @update_bank: bank to control on/off
c789ca20 SI	38	* @update_reg: register to control on/off
	39	* @mask: mask to enable/disable regulator
	40	* @enable: bits to enable the regulator in normal(high power) mode
47c16975	41	* @voltage_bank: bank to control regulator voltage
c789ca20 SI	42	* @voltage_reg: register to control regulator voltage
	43	* @voltage_mask: mask to control regulator voltage
	44	* @supported_voltages: supported voltage table
	45	* @voltages_len: number of supported voltages for the regulator
	46	*/
	47	struct ab8500_regulator_info {
	48	struct device *dev;
	49	struct regulator_desc desc;
	50	struct ab8500 *ab8500;
	51	struct regulator_dev *regulator;
	52	int max_uV;
	53	int min_uV;
	54	int fixed_uV;
47c16975 MW	55	u8 update_bank;
	56	u8 update_reg;
	57	u8 mask;
	58	u8 enable;
	59	u8 voltage_bank;
	60	u8 voltage_reg;
	61	u8 voltage_mask;
c789ca20 SI	62	int const *supported_voltages;
	63	int voltages_len;
	64	};
	65
	66	/* voltage tables for the vauxn/vintcore supplies */
	67	static const int ldo_vauxn_voltages[] = {
	68	1100000,
	69	1200000,
	70	1300000,
	71	1400000,
	72	1500000,
	73	1800000,
	74	1850000,
	75	1900000,
	76	2500000,
	77	2650000,
	78	2700000,
	79	2750000,
	80	2800000,
	81	2900000,
	82	3000000,
	83	3300000,
	84	};
	85
	86	static const int ldo_vintcore_voltages[] = {
	87	1200000,
	88	1225000,
	89	1250000,
	90	1275000,
	91	1300000,
	92	1325000,
	93	1350000,
	94	};
	95
	96	static int ab8500_regulator_enable(struct regulator_dev *rdev)
	97	{
	98	int regulator_id, ret;
	99	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	100
	101	regulator_id = rdev_get_id(rdev);
	102	if (regulator_id >= AB8500_NUM_REGULATORS)
	103	return -EINVAL;
	104
47c16975 MW	105	ret = abx500_mask_and_set_register_interruptible(info->dev,
47c16975 MW	106	info->update_bank, info->update_reg, info->mask, info->enable);
c789ca20 SI	107	if (ret < 0)
	108	dev_err(rdev_get_dev(rdev),
	109	"couldn't set enable bits for regulator\n");
	110	return ret;
	111	}
	112
	113	static int ab8500_regulator_disable(struct regulator_dev *rdev)
	114	{
	115	int regulator_id, ret;
	116	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	117
	118	regulator_id = rdev_get_id(rdev);
	119	if (regulator_id >= AB8500_NUM_REGULATORS)
	120	return -EINVAL;
	121
47c16975 MW	122	ret = abx500_mask_and_set_register_interruptible(info->dev,
47c16975 MW	123	info->update_bank, info->update_reg, info->mask, 0x0);
c789ca20 SI	124	if (ret < 0)
	125	dev_err(rdev_get_dev(rdev),
	126	"couldn't set disable bits for regulator\n");
	127	return ret;
	128	}
	129
	130	static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
	131	{
	132	int regulator_id, ret;
	133	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
47c16975	134	u8 value;
c789ca20 SI	135
	136	regulator_id = rdev_get_id(rdev);
	137	if (regulator_id >= AB8500_NUM_REGULATORS)
	138	return -EINVAL;
	139
47c16975 MW	140	ret = abx500_get_register_interruptible(info->dev,
47c16975 MW	141	info->update_bank, info->update_reg, &value);
c789ca20 SI	142	if (ret < 0) {
	143	dev_err(rdev_get_dev(rdev),
	144	"couldn't read 0x%x register\n", info->update_reg);
	145	return ret;
	146	}
	147
47c16975	148	if (value & info->mask)
c789ca20 SI	149	return true;
	150	else
	151	return false;
	152	}
	153
	154	static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
	155	{
	156	int regulator_id;
	157	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	158
	159	regulator_id = rdev_get_id(rdev);
	160	if (regulator_id >= AB8500_NUM_REGULATORS)
	161	return -EINVAL;
	162
	163	/* return the uV for the fixed regulators */
	164	if (info->fixed_uV)
	165	return info->fixed_uV;
	166
49990e6e	167	if (selector >= info->voltages_len)
c789ca20 SI	168	return -EINVAL;
	169
	170	return info->supported_voltages[selector];
	171	}
	172
	173	static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
	174	{
47c16975	175	int regulator_id, ret;
c789ca20	176	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
47c16975	177	u8 value;
c789ca20 SI	178
	179	regulator_id = rdev_get_id(rdev);
	180	if (regulator_id >= AB8500_NUM_REGULATORS)
	181	return -EINVAL;
	182
47c16975 MW	183	ret = abx500_get_register_interruptible(info->dev, info->voltage_bank,
47c16975 MW	184	info->voltage_reg, &value);
c789ca20 SI	185	if (ret < 0) {
	186	dev_err(rdev_get_dev(rdev),
	187	"couldn't read voltage reg for regulator\n");
	188	return ret;
	189	}
	190
	191	/* vintcore has a different layout */
47c16975	192	value &= info->voltage_mask;
c789ca20	193	if (regulator_id == AB8500_LDO_INTCORE)
47c16975	194	ret = info->supported_voltages[value >> 0x3];
c789ca20	195	else
47c16975	196	ret = info->supported_voltages[value];
c789ca20 SI	197
	198	return ret;
	199	}
	200
	201	static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
	202	int min_uV, int max_uV)
	203	{
	204	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	205	int i;
	206
	207	/* check the supported voltage */
	208	for (i = 0; i < info->voltages_len; i++) {
	209	if ((info->supported_voltages[i] >= min_uV) &&
	210	(info->supported_voltages[i] <= max_uV))
	211	return i;
	212	}
	213
	214	return -EINVAL;
	215	}
	216
	217	static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
	218	int min_uV, int max_uV)
	219	{
	220	int regulator_id, ret;
	221	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	222
	223	regulator_id = rdev_get_id(rdev);
	224	if (regulator_id >= AB8500_NUM_REGULATORS)
	225	return -EINVAL;
	226
	227	/* get the appropriate voltages within the range */
	228	ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
	229	if (ret < 0) {
	230	dev_err(rdev_get_dev(rdev),
	231	"couldn't get best voltage for regulator\n");
	232	return ret;
	233	}
	234
	235	/* set the registers for the request */
47c16975 MW	236	ret = abx500_mask_and_set_register_interruptible(info->dev,
	237	info->voltage_bank, info->voltage_reg,
	238	info->voltage_mask, (u8)ret);
c789ca20 SI	239	if (ret < 0)
	240	dev_err(rdev_get_dev(rdev),
	241	"couldn't set voltage reg for regulator\n");
	242
	243	return ret;
	244	}
	245
	246	static struct regulator_ops ab8500_regulator_ops = {
	247	.enable = ab8500_regulator_enable,
	248	.disable = ab8500_regulator_disable,
	249	.is_enabled = ab8500_regulator_is_enabled,
	250	.get_voltage = ab8500_regulator_get_voltage,
	251	.set_voltage = ab8500_regulator_set_voltage,
	252	.list_voltage = ab8500_list_voltage,
	253	};
	254
	255	static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
	256	{
	257	int regulator_id;
	258	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	259
	260	regulator_id = rdev_get_id(rdev);
	261	if (regulator_id >= AB8500_NUM_REGULATORS)
	262	return -EINVAL;
	263
	264	return info->fixed_uV;
	265	}
	266
	267	static struct regulator_ops ab8500_ldo_fixed_ops = {
	268	.enable = ab8500_regulator_enable,
	269	.disable = ab8500_regulator_disable,
	270	.is_enabled = ab8500_regulator_is_enabled,
	271	.get_voltage = ab8500_fixed_get_voltage,
	272	.list_voltage = ab8500_list_voltage,
	273	};
	274
47c16975 MW	275	#define AB8500_LDO(_id, min, max, bank, reg, reg_mask, \
	276	reg_enable, volt_bank, volt_reg, volt_mask, \
	277	voltages, len_volts) \
c789ca20 SI	278	{ \
	279	.desc = { \
	280	.name = "LDO-" #_id, \
	281	.ops = &ab8500_regulator_ops, \
	282	.type = REGULATOR_VOLTAGE, \
	283	.id = AB8500_LDO_##_id, \
	284	.owner = THIS_MODULE, \
	285	}, \
	286	.min_uV = (min) * 1000, \
	287	.max_uV = (max) * 1000, \
47c16975	288	.update_bank = bank, \
c789ca20 SI	289	.update_reg = reg, \
	290	.mask = reg_mask, \
	291	.enable = reg_enable, \
47c16975	292	.voltage_bank = volt_bank, \
c789ca20 SI	293	.voltage_reg = volt_reg, \
	294	.voltage_mask = volt_mask, \
	295	.supported_voltages = voltages, \
	296	.voltages_len = len_volts, \
	297	.fixed_uV = 0, \
	298	}
	299
47c16975 MW	300	#define AB8500_FIXED_LDO(_id, fixed, bank, reg, \
47c16975 MW	301	reg_mask, reg_enable) \
c789ca20 SI	302	{ \
	303	.desc = { \
	304	.name = "LDO-" #_id, \
	305	.ops = &ab8500_ldo_fixed_ops, \
	306	.type = REGULATOR_VOLTAGE, \
	307	.id = AB8500_LDO_##_id, \
	308	.owner = THIS_MODULE, \
	309	}, \
	310	.fixed_uV = fixed * 1000, \
47c16975	311	.update_bank = bank, \
c789ca20 SI	312	.update_reg = reg, \
	313	.mask = reg_mask, \
	314	.enable = reg_enable, \
	315	}
	316
	317	static struct ab8500_regulator_info ab8500_regulator_info[] = {
	318	/*
	319	* Variable Voltage LDOs
47c16975 MW	320	* name, min uV, max uV, ctrl bank, ctrl reg, reg mask, enable mask,
	321	* volt ctrl bank, volt ctrl reg, volt ctrl mask, volt table,
	322	* num supported volts
c789ca20	323	*/
47c16975	324	AB8500_LDO(AUX1, 1100, 3300, 0x04, 0x09, 0x3, 0x1, 0x04, 0x1f, 0xf,
c789ca20	325	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
47c16975	326	AB8500_LDO(AUX2, 1100, 3300, 0x04, 0x09, 0xc, 0x4, 0x04, 0x20, 0xf,
c789ca20	327	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
47c16975	328	AB8500_LDO(AUX3, 1100, 3300, 0x04, 0x0a, 0x3, 0x1, 0x04, 0x21, 0xf,
c789ca20	329	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
47c16975	330	AB8500_LDO(INTCORE, 1100, 3300, 0x03, 0x80, 0x4, 0x4, 0x03, 0x80, 0x38,
c789ca20 SI	331	ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)),
	332
	333	/*
	334	* Fixed Voltage LDOs
47c16975	335	* name, o/p uV, ctrl bank, ctrl reg, enable, disable
c789ca20	336	*/
47c16975 MW	337	AB8500_FIXED_LDO(TVOUT, 2000, 0x03, 0x80, 0x2, 0x2),
	338	AB8500_FIXED_LDO(AUDIO, 2000, 0x03, 0x83, 0x2, 0x2),
	339	AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03, 0x83, 0x4, 0x4),
	340	AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03, 0x83, 0x8, 0x8),
	341	AB8500_FIXED_LDO(DMIC, 1800, 0x03, 0x83, 0x10, 0x10),
	342	AB8500_FIXED_LDO(ANA, 1200, 0x03, 0x83, 0xc, 0x4),
c789ca20 SI	343	};
	344
	345	static inline struct ab8500_regulator_info *find_regulator_info(int id)
	346	{
	347	struct ab8500_regulator_info *info;
	348	int i;
	349
	350	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	351	info = &ab8500_regulator_info[i];
	352	if (info->desc.id == id)
	353	return info;
	354	}
	355	return NULL;
	356	}
	357
	358	static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
	359	{
	360	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
af54decd	361	struct ab8500_platform_data *pdata;
c789ca20 SI	362	int i, err;
	363
	364	if (!ab8500) {
	365	dev_err(&pdev->dev, "null mfd parent\n");
	366	return -EINVAL;
	367	}
af54decd	368	pdata = dev_get_platdata(ab8500->dev);
c789ca20 SI	369
	370	/* register all regulators */
	371	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	372	struct ab8500_regulator_info *info = NULL;
	373
	374	/* assign per-regulator data */
	375	info = &ab8500_regulator_info[i];
	376	info->dev = &pdev->dev;
	377	info->ab8500 = ab8500;
	378
	379	info->regulator = regulator_register(&info->desc, &pdev->dev,
	380	pdata->regulator[i], info);
	381	if (IS_ERR(info->regulator)) {
	382	err = PTR_ERR(info->regulator);
	383	dev_err(&pdev->dev, "failed to register regulator %s\n",
	384	info->desc.name);
	385	/* when we fail, un-register all earlier regulators */
d4876a3b	386	while (--i >= 0) {
c789ca20 SI	387	info = &ab8500_regulator_info[i];
c789ca20 SI	388	regulator_unregister(info->regulator);
c789ca20 SI	389	}
	390	return err;
	391	}
	392	}
	393
	394	return 0;
	395	}
	396
	397	static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
	398	{
	399	int i;
	400
	401	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	402	struct ab8500_regulator_info *info = NULL;
	403	info = &ab8500_regulator_info[i];
	404	regulator_unregister(info->regulator);
	405	}
	406
	407	return 0;
	408	}
	409
	410	static struct platform_driver ab8500_regulator_driver = {
	411	.probe = ab8500_regulator_probe,
	412	.remove = __devexit_p(ab8500_regulator_remove),
	413	.driver = {
	414	.name = "ab8500-regulator",
	415	.owner = THIS_MODULE,
	416	},
	417	};
	418
	419	static int __init ab8500_regulator_init(void)
	420	{
	421	int ret;
	422
	423	ret = platform_driver_register(&ab8500_regulator_driver);
	424	if (ret != 0)
	425	pr_err("Failed to register ab8500 regulator: %d\n", ret);
	426
	427	return ret;
	428	}
	429	subsys_initcall(ab8500_regulator_init);
	430
	431	static void __exit ab8500_regulator_exit(void)
	432	{
	433	platform_driver_unregister(&ab8500_regulator_driver);
	434	}
	435	module_exit(ab8500_regulator_exit);
	436
	437	MODULE_LICENSE("GPL v2");
	438	MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
	439	MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
	440	MODULE_ALIAS("platform:ab8500-regulator");