[deliverable/linux.git] / drivers / regulator / ab8500.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License v2
 *
 * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
 *          Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
 *
 * AB8500 peripheral regulators
 *
 * AB8500 supports the following regulators:
 *   VAUX1/2/3, VINTCORE, VTVOUT, VAUDIO, VAMIC1/2, VDMIC, VANA
 */
#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
 * @dev: device pointer
 * @desc: regulator description
 * @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
 * @update_mask: mask to enable/disable regulator
 * @update_val_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
 * @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 regulator_dev	*regulator;
	int max_uV;
	int min_uV;
	int fixed_uV;
	u8 update_bank;
	u8 update_reg;
	u8 update_mask;
	u8 update_val_enable;
	u8 voltage_bank;
	u8 voltage_reg;
	u8 voltage_mask;
	int const *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_vaux3_voltages[] = {
	1200000,
	1500000,
	1800000,
	2100000,
	2500000,
	2750000,
	2790000,
	2910000,
};

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->update_mask, info->update_val_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->update_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->update_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->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->voltages[value >> 0x3];
	else
		ret = info->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->voltages[i] >= min_uV) &&
		    (info->voltages[i] <= max_uV))
			return i;
	}

	return -EINVAL;
}

static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
					int min_uV, int max_uV,
					unsigned *selector)
{
	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;
	}

	*selector = 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_mV, _max_mV,			\
	_u_bank, _u_reg, _u_mask, _u_val_enable,		\
	_v_bank, _v_reg, _v_mask, _v_table, _v_table_len)	\
[AB8500_LDO_##_id] = {						\
	.desc	= {						\
		.name		= "LDO-" #_id,			\
		.ops		= &ab8500_regulator_ops,	\
		.type		= REGULATOR_VOLTAGE,		\
		.id		= AB8500_LDO_##_id,		\
		.owner		= THIS_MODULE,			\
	},							\
	.min_uV			= (_min_mV) * 1000,		\
	.max_uV			= (_max_mV) * 1000,		\
	.update_bank		= _u_bank,			\
	.update_reg		= _u_reg,			\
	.update_mask		= _u_mask,			\
	.update_val_enable	= _u_val_enable,		\
	.voltage_bank		= _v_bank,			\
	.voltage_reg		= _v_reg,			\
	.voltage_mask		= _v_mask,			\
	.voltages		= _v_table,			\
	.voltages_len		= _v_table_len,			\
	.fixed_uV		= 0,				\
}

#define AB8500_FIXED_LDO(_id, _fixed_mV,			\
	_u_bank, _u_reg, _u_mask, _u_val_enable)		\
[AB8500_LDO_##_id] = {						\
	.desc	= {						\
		.name		= "LDO-" #_id,			\
		.ops		= &ab8500_ldo_fixed_ops,	\
		.type		= REGULATOR_VOLTAGE,		\
		.id		= AB8500_LDO_##_id,		\
		.owner		= THIS_MODULE,			\
	},							\
	.fixed_uV		= (_fixed_mV) * 1000,		\
	.update_bank		= _u_bank,			\
	.update_reg		= _u_reg,			\
	.update_mask		= _u_mask,			\
	.update_val_enable	= _u_val_enable,		\
}

static struct ab8500_regulator_info ab8500_regulator_info[] = {
	/*
	 * Variable Voltage Regulators
	 *   name, min mV, max mV,
	 *   update bank, reg, mask, enable val
	 *   volt bank, reg, mask, table, table length
	 */
	AB8500_LDO(AUX1, 1100, 3300,
		0x04, 0x09, 0x03, 0x01, 0x04, 0x1f, 0x0f,
		ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(AUX2, 1100, 3300,
		0x04, 0x09, 0x0c, 0x04, 0x04, 0x20, 0x0f,
		ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(AUX3, 1100, 3300,
		0x04, 0x0a, 0x03, 0x01, 0x04, 0x21, 0x07,
		ldo_vaux3_voltages, ARRAY_SIZE(ldo_vaux3_voltages)),
	AB8500_LDO(INTCORE, 1100, 3300,
		0x03, 0x80, 0x44, 0x04, 0x03, 0x80, 0x38,
		ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)),

	/*
	 * Fixed Voltage Regulators
	 *   name, fixed mV,
	 *   update bank, reg, mask, enable val
	 */
	AB8500_FIXED_LDO(TVOUT,	  2000, 0x03, 0x80, 0x82, 0x02),
	AB8500_FIXED_LDO(AUDIO,   2000, 0x03, 0x83, 0x02, 0x02),
	AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03, 0x83, 0x08, 0x08),
	AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03, 0x83, 0x10, 0x10),
	AB8500_FIXED_LDO(DMIC,    1800, 0x03, 0x83, 0x04, 0x04),
	AB8500_FIXED_LDO(ANA,     1200, 0x04, 0x06, 0x0c, 0x04),
};

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);

	/* make sure the platform data has the correct size */
	if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) {
		dev_err(&pdev->dev, "platform configuration error\n");
		return -EINVAL;
	}

	/* 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;

		/* fix for hardware before ab8500v2.0 */
		if (abx500_get_chip_id(info->dev) < 0x20) {
			if (info->desc.id == AB8500_LDO_AUX3) {
				info->desc.n_voltages =
					ARRAY_SIZE(ldo_vauxn_voltages);
				info->voltages = ldo_vauxn_voltages;
				info->voltages_len =
					ARRAY_SIZE(ldo_vauxn_voltages);
				info->voltage_mask = 0xf;
			}
		}

		/* register regulator with framework */
		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	*
e1159e6d BJ	6	* Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
e1159e6d BJ	7	* Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
c789ca20 SI	8	*
	9	* AB8500 peripheral regulators
	10	*
e1159e6d BJ	11	* AB8500 supports the following regulators:
e1159e6d BJ	12	* VAUX1/2/3, VINTCORE, VTVOUT, VAUDIO, VAMIC1/2, VDMIC, VANA
c789ca20 SI	13	*/
	14	#include <linux/init.h>
	15	#include <linux/kernel.h>
	16	#include <linux/err.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/mfd/ab8500.h>
47c16975	19	#include <linux/mfd/abx500.h>
c789ca20 SI	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/machine.h>
	22	#include <linux/regulator/ab8500.h>
	23
	24	/**
	25	* struct ab8500_regulator_info - ab8500 regulator information
e1159e6d	26	* @dev: device pointer
c789ca20	27	* @desc: regulator description
c789ca20 SI	28	* @regulator_dev: regulator device
	29	* @max_uV: maximum voltage (for variable voltage supplies)
	30	* @min_uV: minimum voltage (for variable voltage supplies)
	31	* @fixed_uV: typical voltage (for fixed voltage supplies)
47c16975	32	* @update_bank: bank to control on/off
c789ca20	33	* @update_reg: register to control on/off
e1159e6d BJ	34	* @update_mask: mask to enable/disable regulator
e1159e6d BJ	35	* @update_val_enable: bits to enable the regulator in normal (high power) mode
47c16975	36	* @voltage_bank: bank to control regulator voltage
c789ca20 SI	37	* @voltage_reg: register to control regulator voltage
c789ca20 SI	38	* @voltage_mask: mask to control regulator voltage
e1159e6d	39	* @voltages: supported voltage table
c789ca20 SI	40	* @voltages_len: number of supported voltages for the regulator
	41	*/
	42	struct ab8500_regulator_info {
	43	struct device *dev;
	44	struct regulator_desc desc;
c789ca20 SI	45	struct regulator_dev *regulator;
	46	int max_uV;
	47	int min_uV;
	48	int fixed_uV;
47c16975 MW	49	u8 update_bank;
47c16975 MW	50	u8 update_reg;
e1159e6d BJ	51	u8 update_mask;
e1159e6d BJ	52	u8 update_val_enable;
47c16975 MW	53	u8 voltage_bank;
	54	u8 voltage_reg;
	55	u8 voltage_mask;
e1159e6d	56	int const *voltages;
c789ca20 SI	57	int voltages_len;
	58	};
	59
	60	/* voltage tables for the vauxn/vintcore supplies */
	61	static const int ldo_vauxn_voltages[] = {
	62	1100000,
	63	1200000,
	64	1300000,
	65	1400000,
	66	1500000,
	67	1800000,
	68	1850000,
	69	1900000,
	70	2500000,
	71	2650000,
	72	2700000,
	73	2750000,
	74	2800000,
	75	2900000,
	76	3000000,
	77	3300000,
	78	};
	79
2b75151a BJ	80	static const int ldo_vaux3_voltages[] = {
	81	1200000,
	82	1500000,
	83	1800000,
	84	2100000,
	85	2500000,
	86	2750000,
	87	2790000,
	88	2910000,
	89	};
	90
c789ca20 SI	91	static const int ldo_vintcore_voltages[] = {
	92	1200000,
	93	1225000,
	94	1250000,
	95	1275000,
	96	1300000,
	97	1325000,
	98	1350000,
	99	};
	100
	101	static int ab8500_regulator_enable(struct regulator_dev *rdev)
	102	{
	103	int regulator_id, ret;
	104	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	105
	106	regulator_id = rdev_get_id(rdev);
	107	if (regulator_id >= AB8500_NUM_REGULATORS)
	108	return -EINVAL;
	109
47c16975	110	ret = abx500_mask_and_set_register_interruptible(info->dev,
e1159e6d BJ	111	info->update_bank, info->update_reg,
e1159e6d BJ	112	info->update_mask, info->update_val_enable);
c789ca20 SI	113	if (ret < 0)
	114	dev_err(rdev_get_dev(rdev),
	115	"couldn't set enable bits for regulator\n");
	116	return ret;
	117	}
	118
	119	static int ab8500_regulator_disable(struct regulator_dev *rdev)
	120	{
	121	int regulator_id, ret;
	122	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	123
	124	regulator_id = rdev_get_id(rdev);
	125	if (regulator_id >= AB8500_NUM_REGULATORS)
	126	return -EINVAL;
	127
47c16975	128	ret = abx500_mask_and_set_register_interruptible(info->dev,
e1159e6d BJ	129	info->update_bank, info->update_reg,
e1159e6d BJ	130	info->update_mask, 0x0);
c789ca20 SI	131	if (ret < 0)
	132	dev_err(rdev_get_dev(rdev),
	133	"couldn't set disable bits for regulator\n");
	134	return ret;
	135	}
	136
	137	static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
	138	{
	139	int regulator_id, ret;
	140	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
47c16975	141	u8 value;
c789ca20 SI	142
	143	regulator_id = rdev_get_id(rdev);
	144	if (regulator_id >= AB8500_NUM_REGULATORS)
	145	return -EINVAL;
	146
47c16975 MW	147	ret = abx500_get_register_interruptible(info->dev,
47c16975 MW	148	info->update_bank, info->update_reg, &value);
c789ca20 SI	149	if (ret < 0) {
	150	dev_err(rdev_get_dev(rdev),
	151	"couldn't read 0x%x register\n", info->update_reg);
	152	return ret;
	153	}
	154
e1159e6d	155	if (value & info->update_mask)
c789ca20 SI	156	return true;
	157	else
	158	return false;
	159	}
	160
	161	static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
	162	{
	163	int regulator_id;
	164	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	165
	166	regulator_id = rdev_get_id(rdev);
	167	if (regulator_id >= AB8500_NUM_REGULATORS)
	168	return -EINVAL;
	169
	170	/* return the uV for the fixed regulators */
	171	if (info->fixed_uV)
	172	return info->fixed_uV;
	173
49990e6e	174	if (selector >= info->voltages_len)
c789ca20 SI	175	return -EINVAL;
c789ca20 SI	176
e1159e6d	177	return info->voltages[selector];
c789ca20 SI	178	}
	179
	180	static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
	181	{
47c16975	182	int regulator_id, ret;
c789ca20	183	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
47c16975	184	u8 value;
c789ca20 SI	185
	186	regulator_id = rdev_get_id(rdev);
	187	if (regulator_id >= AB8500_NUM_REGULATORS)
	188	return -EINVAL;
	189
47c16975 MW	190	ret = abx500_get_register_interruptible(info->dev, info->voltage_bank,
47c16975 MW	191	info->voltage_reg, &value);
c789ca20 SI	192	if (ret < 0) {
	193	dev_err(rdev_get_dev(rdev),
	194	"couldn't read voltage reg for regulator\n");
	195	return ret;
	196	}
	197
	198	/* vintcore has a different layout */
47c16975	199	value &= info->voltage_mask;
c789ca20	200	if (regulator_id == AB8500_LDO_INTCORE)
e1159e6d	201	ret = info->voltages[value >> 0x3];
c789ca20	202	else
e1159e6d	203	ret = info->voltages[value];
c789ca20 SI	204
	205	return ret;
	206	}
	207
	208	static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
	209	int min_uV, int max_uV)
	210	{
	211	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	212	int i;
	213
	214	/* check the supported voltage */
	215	for (i = 0; i < info->voltages_len; i++) {
e1159e6d BJ	216	if ((info->voltages[i] >= min_uV) &&
e1159e6d BJ	217	(info->voltages[i] <= max_uV))
c789ca20 SI	218	return i;
	219	}
	220
	221	return -EINVAL;
	222	}
	223
	224	static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
3a93f2a9 MB	225	int min_uV, int max_uV,
3a93f2a9 MB	226	unsigned *selector)
c789ca20 SI	227	{
	228	int regulator_id, ret;
	229	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	230
	231	regulator_id = rdev_get_id(rdev);
	232	if (regulator_id >= AB8500_NUM_REGULATORS)
	233	return -EINVAL;
	234
	235	/* get the appropriate voltages within the range */
	236	ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
	237	if (ret < 0) {
	238	dev_err(rdev_get_dev(rdev),
	239	"couldn't get best voltage for regulator\n");
	240	return ret;
	241	}
	242
3a93f2a9 MB	243	*selector = ret;
3a93f2a9 MB	244
c789ca20	245	/* set the registers for the request */
47c16975 MW	246	ret = abx500_mask_and_set_register_interruptible(info->dev,
	247	info->voltage_bank, info->voltage_reg,
	248	info->voltage_mask, (u8)ret);
c789ca20 SI	249	if (ret < 0)
	250	dev_err(rdev_get_dev(rdev),
	251	"couldn't set voltage reg for regulator\n");
	252
	253	return ret;
	254	}
	255
	256	static struct regulator_ops ab8500_regulator_ops = {
	257	.enable = ab8500_regulator_enable,
	258	.disable = ab8500_regulator_disable,
	259	.is_enabled = ab8500_regulator_is_enabled,
	260	.get_voltage = ab8500_regulator_get_voltage,
	261	.set_voltage = ab8500_regulator_set_voltage,
	262	.list_voltage = ab8500_list_voltage,
	263	};
	264
	265	static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
	266	{
	267	int regulator_id;
	268	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	269
	270	regulator_id = rdev_get_id(rdev);
	271	if (regulator_id >= AB8500_NUM_REGULATORS)
	272	return -EINVAL;
	273
	274	return info->fixed_uV;
	275	}
	276
	277	static struct regulator_ops ab8500_ldo_fixed_ops = {
	278	.enable = ab8500_regulator_enable,
	279	.disable = ab8500_regulator_disable,
	280	.is_enabled = ab8500_regulator_is_enabled,
	281	.get_voltage = ab8500_fixed_get_voltage,
	282	.list_voltage = ab8500_list_voltage,
	283	};
	284
e1159e6d BJ	285	#define AB8500_LDO(_id, _min_mV, _max_mV, \
	286	_u_bank, _u_reg, _u_mask, _u_val_enable, \
	287	_v_bank, _v_reg, _v_mask, _v_table, _v_table_len) \
	288	[AB8500_LDO_##_id] = { \
c789ca20	289	.desc = { \
e1159e6d BJ	290	.name = "LDO-" #_id, \
	291	.ops = &ab8500_regulator_ops, \
	292	.type = REGULATOR_VOLTAGE, \
	293	.id = AB8500_LDO_##_id, \
	294	.owner = THIS_MODULE, \
c789ca20	295	}, \
e1159e6d BJ	296	.min_uV = (_min_mV) * 1000, \
	297	.max_uV = (_max_mV) * 1000, \
	298	.update_bank = _u_bank, \
	299	.update_reg = _u_reg, \
	300	.update_mask = _u_mask, \
	301	.update_val_enable = _u_val_enable, \
	302	.voltage_bank = _v_bank, \
	303	.voltage_reg = _v_reg, \
	304	.voltage_mask = _v_mask, \
	305	.voltages = _v_table, \
	306	.voltages_len = _v_table_len, \
	307	.fixed_uV = 0, \
c789ca20 SI	308	}
c789ca20 SI	309
e1159e6d BJ	310	#define AB8500_FIXED_LDO(_id, _fixed_mV, \
	311	_u_bank, _u_reg, _u_mask, _u_val_enable) \
	312	[AB8500_LDO_##_id] = { \
	313	.desc = { \
	314	.name = "LDO-" #_id, \
	315	.ops = &ab8500_ldo_fixed_ops, \
	316	.type = REGULATOR_VOLTAGE, \
	317	.id = AB8500_LDO_##_id, \
	318	.owner = THIS_MODULE, \
	319	}, \
	320	.fixed_uV = (_fixed_mV) * 1000, \
	321	.update_bank = _u_bank, \
	322	.update_reg = _u_reg, \
	323	.update_mask = _u_mask, \
	324	.update_val_enable = _u_val_enable, \
c789ca20 SI	325	}
	326
	327	static struct ab8500_regulator_info ab8500_regulator_info[] = {
	328	/*
e1159e6d BJ	329	* Variable Voltage Regulators
	330	* name, min mV, max mV,
	331	* update bank, reg, mask, enable val
	332	* volt bank, reg, mask, table, table length
c789ca20	333	*/
e1159e6d BJ	334	AB8500_LDO(AUX1, 1100, 3300,
	335	0x04, 0x09, 0x03, 0x01, 0x04, 0x1f, 0x0f,
	336	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	337	AB8500_LDO(AUX2, 1100, 3300,
	338	0x04, 0x09, 0x0c, 0x04, 0x04, 0x20, 0x0f,
	339	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	340	AB8500_LDO(AUX3, 1100, 3300,
	341	0x04, 0x0a, 0x03, 0x01, 0x04, 0x21, 0x07,
	342	ldo_vaux3_voltages, ARRAY_SIZE(ldo_vaux3_voltages)),
	343	AB8500_LDO(INTCORE, 1100, 3300,
	344	0x03, 0x80, 0x44, 0x04, 0x03, 0x80, 0x38,
c789ca20 SI	345	ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)),
	346
	347	/*
e1159e6d BJ	348	* Fixed Voltage Regulators
	349	* name, fixed mV,
	350	* update bank, reg, mask, enable val
c789ca20	351	*/
e1159e6d BJ	352	AB8500_FIXED_LDO(TVOUT, 2000, 0x03, 0x80, 0x82, 0x02),
	353	AB8500_FIXED_LDO(AUDIO, 2000, 0x03, 0x83, 0x02, 0x02),
	354	AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03, 0x83, 0x08, 0x08),
	355	AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03, 0x83, 0x10, 0x10),
	356	AB8500_FIXED_LDO(DMIC, 1800, 0x03, 0x83, 0x04, 0x04),
	357	AB8500_FIXED_LDO(ANA, 1200, 0x04, 0x06, 0x0c, 0x04),
c789ca20 SI	358	};
c789ca20 SI	359
c789ca20 SI	360	static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
	361	{
	362	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
af54decd	363	struct ab8500_platform_data *pdata;
c789ca20 SI	364	int i, err;
	365
	366	if (!ab8500) {
	367	dev_err(&pdev->dev, "null mfd parent\n");
	368	return -EINVAL;
	369	}
af54decd	370	pdata = dev_get_platdata(ab8500->dev);
c789ca20	371
cb189b07 BJ	372	/* make sure the platform data has the correct size */
	373	if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) {
	374	dev_err(&pdev->dev, "platform configuration error\n");
	375	return -EINVAL;
	376	}
	377
c789ca20 SI	378	/* register all regulators */
	379	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	380	struct ab8500_regulator_info *info = NULL;
	381
	382	/* assign per-regulator data */
	383	info = &ab8500_regulator_info[i];
	384	info->dev = &pdev->dev;
c789ca20	385
2b75151a BJ	386	/* fix for hardware before ab8500v2.0 */
	387	if (abx500_get_chip_id(info->dev) < 0x20) {
	388	if (info->desc.id == AB8500_LDO_AUX3) {
	389	info->desc.n_voltages =
	390	ARRAY_SIZE(ldo_vauxn_voltages);
e1159e6d	391	info->voltages = ldo_vauxn_voltages;
2b75151a BJ	392	info->voltages_len =
	393	ARRAY_SIZE(ldo_vauxn_voltages);
	394	info->voltage_mask = 0xf;
	395	}
	396	}
	397
	398	/* register regulator with framework */
c789ca20	399	info->regulator = regulator_register(&info->desc, &pdev->dev,
cb189b07	400	&pdata->regulator[i], info);
c789ca20 SI	401	if (IS_ERR(info->regulator)) {
	402	err = PTR_ERR(info->regulator);
	403	dev_err(&pdev->dev, "failed to register regulator %s\n",
	404	info->desc.name);
	405	/* when we fail, un-register all earlier regulators */
d4876a3b	406	while (--i >= 0) {
c789ca20 SI	407	info = &ab8500_regulator_info[i];
c789ca20 SI	408	regulator_unregister(info->regulator);
c789ca20 SI	409	}
	410	return err;
	411	}
	412	}
	413
	414	return 0;
	415	}
	416
	417	static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
	418	{
	419	int i;
	420
	421	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	422	struct ab8500_regulator_info *info = NULL;
	423	info = &ab8500_regulator_info[i];
	424	regulator_unregister(info->regulator);
	425	}
	426
	427	return 0;
	428	}
	429
	430	static struct platform_driver ab8500_regulator_driver = {
	431	.probe = ab8500_regulator_probe,
	432	.remove = __devexit_p(ab8500_regulator_remove),
	433	.driver = {
	434	.name = "ab8500-regulator",
	435	.owner = THIS_MODULE,
	436	},
	437	};
	438
	439	static int __init ab8500_regulator_init(void)
	440	{
	441	int ret;
	442
	443	ret = platform_driver_register(&ab8500_regulator_driver);
	444	if (ret != 0)
	445	pr_err("Failed to register ab8500 regulator: %d\n", ret);
	446
	447	return ret;
	448	}
	449	subsys_initcall(ab8500_regulator_init);
	450
	451	static void __exit ab8500_regulator_exit(void)
	452	{
	453	platform_driver_unregister(&ab8500_regulator_driver);
	454	}
	455	module_exit(ab8500_regulator_exit);
	456
	457	MODULE_LICENSE("GPL v2");
	458	MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
	459	MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
	460	MODULE_ALIAS("platform:ab8500-regulator");