[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / da9052-regulator.c

/*
* da9052-regulator.c: Regulator driver for DA9052
*
* Copyright(c) 2011 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.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/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>

#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
#include <linux/mfd/da9052/pdata.h>

/* Buck step size */
#define DA9052_BUCK_PERI_3uV_STEP		100000
#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV	24
#define DA9052_CONST_3uV			3000000

#define DA9052_MIN_UA		0
#define DA9052_MAX_UA		3
#define DA9052_CURRENT_RANGE	4

/* Bit masks */
#define DA9052_BUCK_ILIM_MASK_EVEN	0x0c
#define DA9052_BUCK_ILIM_MASK_ODD	0xc0

/* DA9052 REGULATOR IDs */
#define DA9052_ID_BUCK1		0
#define DA9052_ID_BUCK2		1
#define DA9052_ID_BUCK3		2
#define DA9052_ID_BUCK4		3
#define DA9052_ID_LDO1		4
#define DA9052_ID_LDO2		5
#define DA9052_ID_LDO3		6
#define DA9052_ID_LDO4		7
#define DA9052_ID_LDO5		8
#define DA9052_ID_LDO6		9
#define DA9052_ID_LDO7		10
#define DA9052_ID_LDO8		11
#define DA9052_ID_LDO9		12
#define DA9052_ID_LDO10		13

static const u32 da9052_current_limits[3][4] = {
	{700000, 800000, 1000000, 1200000},	/* DA9052-BC BUCKs */
	{1600000, 2000000, 2400000, 3000000},	/* DA9053-AA/Bx BUCK-CORE */
	{800000, 1000000, 1200000, 1500000},	/* DA9053-AA/Bx BUCK-PRO,
						 * BUCK-MEM and BUCK-PERI
						*/
};

struct da9052_regulator_info {
	struct regulator_desc reg_desc;
	int step_uV;
	int min_uV;
	int max_uV;
	unsigned char volt_shift;
	unsigned char en_bit;
	unsigned char activate_bit;
};

struct da9052_regulator {
	struct da9052 *da9052;
	struct da9052_regulator_info *info;
	struct regulator_dev *rdev;
};

static int verify_range(struct da9052_regulator_info *info,
			 int min_uV, int max_uV)
{
	if (min_uV > info->max_uV || max_uV < info->min_uV)
		return -EINVAL;

	return 0;
}

static int da9052_regulator_enable(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);

	return da9052_reg_update(regulator->da9052,
				 DA9052_BUCKCORE_REG + offset,
				 1 << info->en_bit, 1 << info->en_bit);
}

static int da9052_regulator_disable(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);

	return da9052_reg_update(regulator->da9052,
				 DA9052_BUCKCORE_REG + offset,
				 1 << info->en_bit, 0);
}

static int da9052_regulator_is_enabled(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);
	int ret;

	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	if (ret < 0)
		return ret;

	return ret & (1 << info->en_bit);
}

static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	int offset = rdev_get_id(rdev);
	int ret, row = 2;

	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
	if (ret < 0)
		return ret;

	/* Determine the even or odd position of the buck current limit
	 * register field
	*/
	if (offset % 2 == 0)
		ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
	else
		ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;

	/* Select the appropriate current limit range */
	if (regulator->da9052->chip_id == DA9052)
		row = 0;
	else if (offset == 0)
		row = 1;

	return da9052_current_limits[row][ret];
}

static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
					  int max_uA)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	int offset = rdev_get_id(rdev);
	int reg_val = 0;
	int i, row = 2;

	/* Select the appropriate current limit range */
	if (regulator->da9052->chip_id == DA9052)
		row = 0;
	else if (offset == 0)
		row = 1;

	if (min_uA > da9052_current_limits[row][DA9052_MAX_UA] ||
	    max_uA < da9052_current_limits[row][DA9052_MIN_UA])
		return -EINVAL;

	for (i = 0; i < DA9052_CURRENT_RANGE; i++) {
		if (min_uA <= da9052_current_limits[row][i]) {
			reg_val = i;
			break;
		}
	}

	/* Determine the even or odd position of the buck current limit
	 * register field
	*/
	if (offset % 2 == 0)
		return da9052_reg_update(regulator->da9052,
					 DA9052_BUCKA_REG + offset/2,
					 DA9052_BUCK_ILIM_MASK_EVEN,
					 reg_val << 2);
	else
		return da9052_reg_update(regulator->da9052,
					 DA9052_BUCKA_REG + offset/2,
					 DA9052_BUCK_ILIM_MASK_ODD,
					 reg_val << 6);
}

static int da9052_list_voltage(struct regulator_dev *rdev,
				unsigned int selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int id = rdev_get_id(rdev);
	int volt_uV;

	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
		&& (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
		volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
			  + info->min_uV);
		volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
				    * (DA9052_BUCK_PERI_3uV_STEP);
	} else {
		volt_uV = (selector * info->step_uV) + info->min_uV;
	}

	if (volt_uV > info->max_uV)
		return -EINVAL;

	return volt_uV;
}

static int da9052_regulator_set_voltage(struct regulator_dev *rdev,
					     int min_uV, int max_uV,
					     unsigned int *selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int id = rdev_get_id(rdev);
	int ret;

	ret = verify_range(info, min_uV, max_uV);
	if (ret < 0)
		return ret;

	if (min_uV < info->min_uV)
		min_uV = info->min_uV;

	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
		&& (min_uV >= DA9052_CONST_3uV)) {
			*selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
				    DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
						 DA9052_BUCK_PERI_3uV_STEP);
	} else {
		*selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
	}

	ret = da9052_list_voltage(rdev, *selector);
	if (ret < 0)
		return ret;

	ret = da9052_reg_update(regulator->da9052,
				 DA9052_BUCKCORE_REG + id,
				 (1 << info->volt_shift) - 1, *selector);
	if (ret < 0)
		return ret;

	/* Some LDOs and DCDCs are DVC controlled which requires enabling of
	 * the activate bit to implment the changes on the output.
	 */
	switch (id) {
	case DA9052_ID_BUCK1:
	case DA9052_ID_BUCK2:
	case DA9052_ID_BUCK3:
	case DA9052_ID_LDO2:
	case DA9052_ID_LDO3:
		ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
					info->activate_bit, info->activate_bit);
		break;
	}

	return ret;
}

static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);
	int ret;

	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	if (ret < 0)
		return ret;

	ret &= ((1 << info->volt_shift) - 1);

	return ret;
}

static struct regulator_ops da9052_dcdc_ops = {
	.set_voltage = da9052_regulator_set_voltage,
	.get_current_limit = da9052_dcdc_get_current_limit,
	.set_current_limit = da9052_dcdc_set_current_limit,

	.list_voltage = da9052_list_voltage,
	.get_voltage_sel = da9052_get_regulator_voltage_sel,
	.is_enabled = da9052_regulator_is_enabled,
	.enable = da9052_regulator_enable,
	.disable = da9052_regulator_disable,
};

static struct regulator_ops da9052_ldo_ops = {
	.set_voltage = da9052_regulator_set_voltage,

	.list_voltage = da9052_list_voltage,
	.get_voltage_sel = da9052_get_regulator_voltage_sel,
	.is_enabled = da9052_regulator_is_enabled,
	.enable = da9052_regulator_enable,
	.disable = da9052_regulator_disable,
};

#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = #_id,\
		.ops = &da9052_ldo_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = DA9052_ID_##_id,\
		.n_voltages = (max - min) / step + 1, \
		.owner = THIS_MODULE,\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.en_bit = (ebits),\
	.activate_bit = (abits),\
}

#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = #_id,\
		.ops = &da9052_dcdc_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = DA9052_ID_##_id,\
		.n_voltages = (max - min) / step + 1, \
		.owner = THIS_MODULE,\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.en_bit = (ebits),\
	.activate_bit = (abits),\
}

static struct da9052_regulator_info da9052_regulator_info[] = {
	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
	DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
};

static struct da9052_regulator_info da9053_regulator_info[] = {
	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
	DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
};

static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
								 int id)
{
	struct da9052_regulator_info *info;
	int i;

	switch (chip_id) {
	case DA9052:
		for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
			info = &da9052_regulator_info[i];
			if (info->reg_desc.id == id)
				return info;
		}
		break;
	case DA9053_AA:
	case DA9053_BA:
	case DA9053_BB:
		for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
			info = &da9053_regulator_info[i];
			if (info->reg_desc.id == id)
				return info;
		}
		break;
	}

	return NULL;
}

static int __devinit da9052_regulator_probe(struct platform_device *pdev)
{
	struct regulator_config config = { };
	struct da9052_regulator *regulator;
	struct da9052 *da9052;
	struct da9052_pdata *pdata;

	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
				 GFP_KERNEL);
	if (!regulator)
		return -ENOMEM;

	da9052 = dev_get_drvdata(pdev->dev.parent);
	pdata = da9052->dev->platform_data;
	regulator->da9052 = da9052;

	regulator->info = find_regulator_info(regulator->da9052->chip_id,
					      pdev->id);
	if (regulator->info == NULL) {
		dev_err(&pdev->dev, "invalid regulator ID specified\n");
		return -EINVAL;
	}

	config.dev = &pdev->dev;
	config.init_data = pdata->regulators[pdev->id];
	config.driver_data = regulator;

	regulator->rdev = regulator_register(&regulator->info->reg_desc,
					     &config);
	if (IS_ERR(regulator->rdev)) {
		dev_err(&pdev->dev, "failed to register regulator %s\n",
			regulator->info->reg_desc.name);
		return PTR_ERR(regulator->rdev);
	}

	platform_set_drvdata(pdev, regulator);

	return 0;
}

static int __devexit da9052_regulator_remove(struct platform_device *pdev)
{
	struct da9052_regulator *regulator = platform_get_drvdata(pdev);

	regulator_unregister(regulator->rdev);
	return 0;
}

static struct platform_driver da9052_regulator_driver = {
	.probe = da9052_regulator_probe,
	.remove = __devexit_p(da9052_regulator_remove),
	.driver = {
		.name = "da9052-regulator",
		.owner = THIS_MODULE,
	},
};

static int __init da9052_regulator_init(void)
{
	return platform_driver_register(&da9052_regulator_driver);
}
subsys_initcall(da9052_regulator_init);

static void __exit da9052_regulator_exit(void)
{
	platform_driver_unregister(&da9052_regulator_driver);
}
module_exit(da9052_regulator_exit);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-regulator");
Commit	Line	Data
08bf1c0a AJ	1	/*
	2	* da9052-regulator.c: Regulator driver for DA9052
	3	*
	4	* Copyright(c) 2011 Dialog Semiconductor Ltd.
	5	*
	6	* Author: David Dajun Chen <dchen@diasemi.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/moduleparam.h>
	17	#include <linux/init.h>
	18	#include <linux/err.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/machine.h>
	22
	23	#include <linux/mfd/da9052/da9052.h>
	24	#include <linux/mfd/da9052/reg.h>
	25	#include <linux/mfd/da9052/pdata.h>
	26
	27	/* Buck step size */
	28	#define DA9052_BUCK_PERI_3uV_STEP 100000
	29	#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
	30	#define DA9052_CONST_3uV 3000000
	31
	32	#define DA9052_MIN_UA 0
	33	#define DA9052_MAX_UA 3
	34	#define DA9052_CURRENT_RANGE 4
	35
	36	/* Bit masks */
	37	#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
	38	#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
	39
9210f05b AL	40	/* DA9052 REGULATOR IDs */
	41	#define DA9052_ID_BUCK1 0
	42	#define DA9052_ID_BUCK2 1
	43	#define DA9052_ID_BUCK3 2
	44	#define DA9052_ID_BUCK4 3
	45	#define DA9052_ID_LDO1 4
	46	#define DA9052_ID_LDO2 5
	47	#define DA9052_ID_LDO3 6
	48	#define DA9052_ID_LDO4 7
	49	#define DA9052_ID_LDO5 8
	50	#define DA9052_ID_LDO6 9
	51	#define DA9052_ID_LDO7 10
	52	#define DA9052_ID_LDO8 11
	53	#define DA9052_ID_LDO9 12
	54	#define DA9052_ID_LDO10 13
	55
08bf1c0a AJ	56	static const u32 da9052_current_limits[3][4] = {
	57	{700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
	58	{1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
	59	{800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
	60	* BUCK-MEM and BUCK-PERI
	61	*/
	62	};
	63
	64	struct da9052_regulator_info {
	65	struct regulator_desc reg_desc;
	66	int step_uV;
	67	int min_uV;
	68	int max_uV;
	69	unsigned char volt_shift;
	70	unsigned char en_bit;
	71	unsigned char activate_bit;
	72	};
	73
	74	struct da9052_regulator {
	75	struct da9052 *da9052;
	76	struct da9052_regulator_info *info;
	77	struct regulator_dev *rdev;
	78	};
	79
	80	static int verify_range(struct da9052_regulator_info *info,
	81	int min_uV, int max_uV)
	82	{
	83	if (min_uV > info->max_uV \|\| max_uV < info->min_uV)
	84	return -EINVAL;
	85
	86	return 0;
	87	}
	88
	89	static int da9052_regulator_enable(struct regulator_dev *rdev)
	90	{
	91	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	92	struct da9052_regulator_info *info = regulator->info;
	93	int offset = rdev_get_id(rdev);
	94
	95	return da9052_reg_update(regulator->da9052,
	96	DA9052_BUCKCORE_REG + offset,
	97	1 << info->en_bit, 1 << info->en_bit);
	98	}
	99
	100	static int da9052_regulator_disable(struct regulator_dev *rdev)
	101	{
	102	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	103	struct da9052_regulator_info *info = regulator->info;
	104	int offset = rdev_get_id(rdev);
	105
	106	return da9052_reg_update(regulator->da9052,
	107	DA9052_BUCKCORE_REG + offset,
	108	1 << info->en_bit, 0);
	109	}
	110
	111	static int da9052_regulator_is_enabled(struct regulator_dev *rdev)
	112	{
	113	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	114	struct da9052_regulator_info *info = regulator->info;
	115	int offset = rdev_get_id(rdev);
	116	int ret;
	117
	118	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	119	if (ret < 0)
120	return ret;
121
122	return ret & (1 << info->en_bit);
123	}
124
125	static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
126	{
127	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
128	int offset = rdev_get_id(rdev);
129	int ret, row = 2;
130
131	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
132	if (ret < 0)
133	return ret;
134
135	/* Determine the even or odd position of the buck current limit
136	* register field
137	*/
138	if (offset % 2 == 0)
139	ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
140	else
141	ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
142
143	/* Select the appropriate current limit range */
144	if (regulator->da9052->chip_id == DA9052)
145	row = 0;
146	else if (offset == 0)
147	row = 1;
148
149	return da9052_current_limits[row][ret];
150	}
151
152	static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
153	int max_uA)
154	{
155	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
156	int offset = rdev_get_id(rdev);
157	int reg_val = 0;
158	int i, row = 2;
159
160	/* Select the appropriate current limit range */
161	if (regulator->da9052->chip_id == DA9052)
162	row = 0;
163	else if (offset == 0)
164	row = 1;
165
166	if (min_uA > da9052_current_limits[row][DA9052_MAX_UA] \|\|
167	max_uA < da9052_current_limits[row][DA9052_MIN_UA])
168	return -EINVAL;
169
170	for (i = 0; i < DA9052_CURRENT_RANGE; i++) {
171	if (min_uA <= da9052_current_limits[row][i]) {
172	reg_val = i;
173	break;
174	}
175	}
176
177	/* Determine the even or odd position of the buck current limit
178	* register field
179	*/
180	if (offset % 2 == 0)
181	return da9052_reg_update(regulator->da9052,
182	DA9052_BUCKA_REG + offset/2,
183	DA9052_BUCK_ILIM_MASK_EVEN,
184	reg_val << 2);
185	else
186	return da9052_reg_update(regulator->da9052,
187	DA9052_BUCKA_REG + offset/2,
188	DA9052_BUCK_ILIM_MASK_ODD,
189	reg_val << 6);
190	}
191
08bf1c0a AJ	192	static int da9052_list_voltage(struct regulator_dev *rdev,
	193	unsigned int selector)
	194	{
	195	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	196	struct da9052_regulator_info *info = regulator->info;
0ec446ea	197	int id = rdev_get_id(rdev);
08bf1c0a AJ	198	int volt_uV;
08bf1c0a AJ	199
0ec446ea AL	200	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
	201	&& (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
	202	volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
	203	+ info->min_uV);
	204	volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
	205	* (DA9052_BUCK_PERI_3uV_STEP);
	206	} else {
	207	volt_uV = (selector * info->step_uV) + info->min_uV;
	208	}
08bf1c0a AJ	209
	210	if (volt_uV > info->max_uV)
	211	return -EINVAL;
	212
	213	return volt_uV;
	214	}
	215
0ec446ea	216	static int da9052_regulator_set_voltage(struct regulator_dev *rdev,
08bf1c0a AJ	217	int min_uV, int max_uV,
	218	unsigned int *selector)
	219	{
	220	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	221	struct da9052_regulator_info *info = regulator->info;
0ec446ea	222	int id = rdev_get_id(rdev);
08bf1c0a AJ	223	int ret;
	224
	225	ret = verify_range(info, min_uV, max_uV);
	226	if (ret < 0)
	227	return ret;
	228
	229	if (min_uV < info->min_uV)
	230	min_uV = info->min_uV;
	231
0ec446ea AL	232	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
	233	&& (min_uV >= DA9052_CONST_3uV)) {
	234	*selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
	235	DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
	236	DA9052_BUCK_PERI_3uV_STEP);
	237	} else {
	238	*selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
	239	}
08bf1c0a AJ	240
	241	ret = da9052_list_voltage(rdev, *selector);
	242	if (ret < 0)
	243	return ret;
	244
0ec446ea AL	245	ret = da9052_reg_update(regulator->da9052,
0ec446ea AL	246	DA9052_BUCKCORE_REG + id,
08bf1c0a	247	(1 << info->volt_shift) - 1, *selector);
08bf1c0a AJ	248	if (ret < 0)
	249	return ret;
	250
0ec446ea AL	251	/* Some LDOs and DCDCs are DVC controlled which requires enabling of
	252	* the activate bit to implment the changes on the output.
	253	*/
	254	switch (id) {
	255	case DA9052_ID_BUCK1:
	256	case DA9052_ID_BUCK2:
	257	case DA9052_ID_BUCK3:
	258	case DA9052_ID_LDO2:
	259	case DA9052_ID_LDO3:
	260	ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
	261	info->activate_bit, info->activate_bit);
	262	break;
	263	}
08bf1c0a AJ	264
	265	return ret;
	266	}
	267
0ec446ea	268	static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
08bf1c0a AJ	269	{
	270	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	271	struct da9052_regulator_info *info = regulator->info;
	272	int offset = rdev_get_id(rdev);
	273	int ret;
	274
	275	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	276	if (ret < 0)
	277	return ret;
	278
	279	ret &= ((1 << info->volt_shift) - 1);
	280
	281	return ret;
	282	}
	283
08bf1c0a	284	static struct regulator_ops da9052_dcdc_ops = {
0ec446ea	285	.set_voltage = da9052_regulator_set_voltage,
08bf1c0a AJ	286	.get_current_limit = da9052_dcdc_get_current_limit,
	287	.set_current_limit = da9052_dcdc_set_current_limit,
	288
	289	.list_voltage = da9052_list_voltage,
	290	.get_voltage_sel = da9052_get_regulator_voltage_sel,
	291	.is_enabled = da9052_regulator_is_enabled,
	292	.enable = da9052_regulator_enable,
	293	.disable = da9052_regulator_disable,
	294	};
	295
08bf1c0a	296	static struct regulator_ops da9052_ldo_ops = {
0ec446ea	297	.set_voltage = da9052_regulator_set_voltage,
08bf1c0a AJ	298
	299	.list_voltage = da9052_list_voltage,
	300	.get_voltage_sel = da9052_get_regulator_voltage_sel,
	301	.is_enabled = da9052_regulator_is_enabled,
	302	.enable = da9052_regulator_enable,
	303	.disable = da9052_regulator_disable,
	304	};
	305
08bf1c0a AJ	306	#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
	307	{\
	308	.reg_desc = {\
9210f05b	309	.name = #_id,\
08bf1c0a AJ	310	.ops = &da9052_ldo_ops,\
08bf1c0a AJ	311	.type = REGULATOR_VOLTAGE,\
9210f05b	312	.id = DA9052_ID_##_id,\
7b957654	313	.n_voltages = (max - min) / step + 1, \
08bf1c0a AJ	314	.owner = THIS_MODULE,\
	315	},\
	316	.min_uV = (min) * 1000,\
	317	.max_uV = (max) * 1000,\
	318	.step_uV = (step) * 1000,\
	319	.volt_shift = (sbits),\
	320	.en_bit = (ebits),\
	321	.activate_bit = (abits),\
	322	}
	323
	324	#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
	325	{\
	326	.reg_desc = {\
9210f05b	327	.name = #_id,\
08bf1c0a AJ	328	.ops = &da9052_dcdc_ops,\
08bf1c0a AJ	329	.type = REGULATOR_VOLTAGE,\
9210f05b	330	.id = DA9052_ID_##_id,\
7b957654	331	.n_voltages = (max - min) / step + 1, \
08bf1c0a AJ	332	.owner = THIS_MODULE,\
	333	},\
	334	.min_uV = (min) * 1000,\
	335	.max_uV = (max) * 1000,\
	336	.step_uV = (step) * 1000,\
	337	.volt_shift = (sbits),\
	338	.en_bit = (ebits),\
	339	.activate_bit = (abits),\
	340	}
	341
6242eae9	342	static struct da9052_regulator_info da9052_regulator_info[] = {
9210f05b AL	343	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	344	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	345	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
0ec446ea	346	DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
9210f05b	347	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
0ec446ea AL	348	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
0ec446ea AL	349	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
9210f05b AL	350	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	351	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	352	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	353	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	354	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	355	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	356	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	357	};
08bf1c0a AJ	358
6242eae9	359	static struct da9052_regulator_info da9053_regulator_info[] = {
9210f05b AL	360	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	361	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	362	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
0ec446ea	363	DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
9210f05b	364	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
0ec446ea AL	365	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
0ec446ea AL	366	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
9210f05b AL	367	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	368	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	369	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	370	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	371	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	372	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	373	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	374	};
	375
	376	static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
	377	int id)
	378	{
	379	struct da9052_regulator_info *info;
	380	int i;
	381
984b5a6b AJ	382	switch (chip_id) {
984b5a6b AJ	383	case DA9052:
08bf1c0a AJ	384	for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
	385	info = &da9052_regulator_info[i];
	386	if (info->reg_desc.id == id)
	387	return info;
	388	}
984b5a6b AJ	389	break;
	390	case DA9053_AA:
	391	case DA9053_BA:
	392	case DA9053_BB:
08bf1c0a AJ	393	for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
	394	info = &da9053_regulator_info[i];
	395	if (info->reg_desc.id == id)
	396	return info;
	397	}
984b5a6b	398	break;
08bf1c0a AJ	399	}
	400
	401	return NULL;
	402	}
	403
	404	static int __devinit da9052_regulator_probe(struct platform_device *pdev)
	405	{
c172708d	406	struct regulator_config config = { };
08bf1c0a AJ	407	struct da9052_regulator *regulator;
	408	struct da9052 *da9052;
	409	struct da9052_pdata *pdata;
08bf1c0a	410
984b5a6b AJ	411	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
984b5a6b AJ	412	GFP_KERNEL);
08bf1c0a AJ	413	if (!regulator)
	414	return -ENOMEM;
	415
	416	da9052 = dev_get_drvdata(pdev->dev.parent);
	417	pdata = da9052->dev->platform_data;
	418	regulator->da9052 = da9052;
	419
	420	regulator->info = find_regulator_info(regulator->da9052->chip_id,
	421	pdev->id);
	422	if (regulator->info == NULL) {
	423	dev_err(&pdev->dev, "invalid regulator ID specified\n");
7eb6444f	424	return -EINVAL;
08bf1c0a	425	}
c172708d MB	426
	427	config.dev = &pdev->dev;
	428	config.init_data = pdata->regulators[pdev->id];
	429	config.driver_data = regulator;
	430
08bf1c0a	431	regulator->rdev = regulator_register(&regulator->info->reg_desc,
c172708d	432	&config);
08bf1c0a AJ	433	if (IS_ERR(regulator->rdev)) {
	434	dev_err(&pdev->dev, "failed to register regulator %s\n",
	435	regulator->info->reg_desc.name);
7eb6444f	436	return PTR_ERR(regulator->rdev);
08bf1c0a AJ	437	}
	438
	439	platform_set_drvdata(pdev, regulator);
	440
	441	return 0;
08bf1c0a AJ	442	}
	443
	444	static int __devexit da9052_regulator_remove(struct platform_device *pdev)
	445	{
	446	struct da9052_regulator *regulator = platform_get_drvdata(pdev);
	447
	448	regulator_unregister(regulator->rdev);
08bf1c0a AJ	449	return 0;
	450	}
	451
	452	static struct platform_driver da9052_regulator_driver = {
	453	.probe = da9052_regulator_probe,
	454	.remove = __devexit_p(da9052_regulator_remove),
	455	.driver = {
	456	.name = "da9052-regulator",
	457	.owner = THIS_MODULE,
	458	},
	459	};
	460
	461	static int __init da9052_regulator_init(void)
	462	{
	463	return platform_driver_register(&da9052_regulator_driver);
	464	}
	465	subsys_initcall(da9052_regulator_init);
	466
	467	static void __exit da9052_regulator_exit(void)
	468	{
	469	platform_driver_unregister(&da9052_regulator_driver);
	470	}
	471	module_exit(da9052_regulator_exit);
	472
	473	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	474	MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
	475	MODULE_LICENSE("GPL");
	476	MODULE_ALIAS("platform:da9052-regulator");