[linux-block.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>
#ifdef CONFIG_OF
#include <linux/regulator/of_regulator.h>
#endif

#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 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_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 = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
};

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 = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
};

#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,\
		.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
		.enable_mask = 1 << (ebits),\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.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,\
		.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
		.enable_mask = 1 << (ebits),\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.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.driver_data = regulator;
	config.regmap = da9052->regmap;
	if (pdata && pdata->regulators) {
		config.init_data = pdata->regulators[pdev->id];
	} else {
#ifdef CONFIG_OF
		struct device_node *nproot = da9052->dev->of_node;
		struct device_node *np;

		if (!nproot)
			return -ENODEV;

		nproot = of_find_node_by_name(nproot, "regulators");
		if (!nproot)
			return -ENODEV;

		for (np = of_get_next_child(nproot, NULL); !np;
		     np = of_get_next_child(nproot, np)) {
			if (!of_node_cmp(np->name,
					 regulator->info->reg_desc.name)) {
				config.init_data = of_get_regulator_init_data(
					&pdev->dev, np);
				break;
			}
		}
#endif
	}

	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>
88c84c14 YCLP	22	#ifdef CONFIG_OF
	23	#include <linux/regulator/of_regulator.h>
	24	#endif
08bf1c0a AJ	25
	26	#include <linux/mfd/da9052/da9052.h>
	27	#include <linux/mfd/da9052/reg.h>
	28	#include <linux/mfd/da9052/pdata.h>
	29
	30	/* Buck step size */
	31	#define DA9052_BUCK_PERI_3uV_STEP 100000
	32	#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
	33	#define DA9052_CONST_3uV 3000000
	34
	35	#define DA9052_MIN_UA 0
	36	#define DA9052_MAX_UA 3
	37	#define DA9052_CURRENT_RANGE 4
	38
	39	/* Bit masks */
	40	#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
	41	#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
	42
9210f05b AL	43	/* DA9052 REGULATOR IDs */
	44	#define DA9052_ID_BUCK1 0
	45	#define DA9052_ID_BUCK2 1
	46	#define DA9052_ID_BUCK3 2
	47	#define DA9052_ID_BUCK4 3
	48	#define DA9052_ID_LDO1 4
	49	#define DA9052_ID_LDO2 5
	50	#define DA9052_ID_LDO3 6
	51	#define DA9052_ID_LDO4 7
	52	#define DA9052_ID_LDO5 8
	53	#define DA9052_ID_LDO6 9
	54	#define DA9052_ID_LDO7 10
	55	#define DA9052_ID_LDO8 11
	56	#define DA9052_ID_LDO9 12
	57	#define DA9052_ID_LDO10 13
	58
08bf1c0a AJ	59	static const u32 da9052_current_limits[3][4] = {
	60	{700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
	61	{1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
	62	{800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
	63	* BUCK-MEM and BUCK-PERI
	64	*/
	65	};
	66
	67	struct da9052_regulator_info {
	68	struct regulator_desc reg_desc;
	69	int step_uV;
	70	int min_uV;
	71	int max_uV;
	72	unsigned char volt_shift;
08bf1c0a AJ	73	unsigned char activate_bit;
	74	};
	75
	76	struct da9052_regulator {
	77	struct da9052 *da9052;
	78	struct da9052_regulator_info *info;
	79	struct regulator_dev *rdev;
	80	};
	81
	82	static int verify_range(struct da9052_regulator_info *info,
	83	int min_uV, int max_uV)
	84	{
	85	if (min_uV > info->max_uV \|\| max_uV < info->min_uV)
	86	return -EINVAL;
	87
	88	return 0;
	89	}
	90
08bf1c0a AJ	91	static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
	92	{
	93	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	94	int offset = rdev_get_id(rdev);
	95	int ret, row = 2;
	96
	97	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
	98	if (ret < 0)
	99	return ret;
	100
	101	/* Determine the even or odd position of the buck current limit
	102	* register field
	103	*/
	104	if (offset % 2 == 0)
	105	ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
	106	else
	107	ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
	108
	109	/* Select the appropriate current limit range */
	110	if (regulator->da9052->chip_id == DA9052)
	111	row = 0;
	112	else if (offset == 0)
	113	row = 1;
	114
	115	return da9052_current_limits[row][ret];
	116	}
	117
	118	static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
	119	int max_uA)
	120	{
	121	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	122	int offset = rdev_get_id(rdev);
	123	int reg_val = 0;
	124	int i, row = 2;
	125
	126	/* Select the appropriate current limit range */
	127	if (regulator->da9052->chip_id == DA9052)
	128	row = 0;
	129	else if (offset == 0)
	130	row = 1;
	131
	132	if (min_uA > da9052_current_limits[row][DA9052_MAX_UA] \|\|
	133	max_uA < da9052_current_limits[row][DA9052_MIN_UA])
	134	return -EINVAL;
	135
	136	for (i = 0; i < DA9052_CURRENT_RANGE; i++) {
	137	if (min_uA <= da9052_current_limits[row][i]) {
	138	reg_val = i;
	139	break;
	140	}
	141	}
	142
	143	/* Determine the even or odd position of the buck current limit
	144	* register field
	145	*/
	146	if (offset % 2 == 0)
	147	return da9052_reg_update(regulator->da9052,
	148	DA9052_BUCKA_REG + offset/2,
	149	DA9052_BUCK_ILIM_MASK_EVEN,
	150	reg_val << 2);
	151	else
	152	return da9052_reg_update(regulator->da9052,
	153	DA9052_BUCKA_REG + offset/2,
	154	DA9052_BUCK_ILIM_MASK_ODD,
155	reg_val << 6);
156	}
157
08bf1c0a AJ	158	static int da9052_list_voltage(struct regulator_dev *rdev,
	159	unsigned int selector)
	160	{
	161	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	162	struct da9052_regulator_info *info = regulator->info;
0ec446ea	163	int id = rdev_get_id(rdev);
08bf1c0a AJ	164	int volt_uV;
08bf1c0a AJ	165
0ec446ea AL	166	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
	167	&& (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
	168	volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
	169	+ info->min_uV);
	170	volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
	171	* (DA9052_BUCK_PERI_3uV_STEP);
	172	} else {
	173	volt_uV = (selector * info->step_uV) + info->min_uV;
	174	}
08bf1c0a AJ	175
	176	if (volt_uV > info->max_uV)
	177	return -EINVAL;
	178
	179	return volt_uV;
	180	}
	181
0ec446ea	182	static int da9052_regulator_set_voltage(struct regulator_dev *rdev,
08bf1c0a AJ	183	int min_uV, int max_uV,
	184	unsigned int *selector)
	185	{
	186	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	187	struct da9052_regulator_info *info = regulator->info;
0ec446ea	188	int id = rdev_get_id(rdev);
08bf1c0a AJ	189	int ret;
	190
	191	ret = verify_range(info, min_uV, max_uV);
	192	if (ret < 0)
	193	return ret;
	194
	195	if (min_uV < info->min_uV)
	196	min_uV = info->min_uV;
	197
0ec446ea AL	198	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
	199	&& (min_uV >= DA9052_CONST_3uV)) {
	200	*selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
	201	DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
	202	DA9052_BUCK_PERI_3uV_STEP);
	203	} else {
	204	*selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
	205	}
08bf1c0a AJ	206
	207	ret = da9052_list_voltage(rdev, *selector);
	208	if (ret < 0)
	209	return ret;
	210
0ec446ea AL	211	ret = da9052_reg_update(regulator->da9052,
0ec446ea AL	212	DA9052_BUCKCORE_REG + id,
08bf1c0a	213	(1 << info->volt_shift) - 1, *selector);
08bf1c0a AJ	214	if (ret < 0)
	215	return ret;
	216
0ec446ea AL	217	/* Some LDOs and DCDCs are DVC controlled which requires enabling of
	218	* the activate bit to implment the changes on the output.
	219	*/
	220	switch (id) {
	221	case DA9052_ID_BUCK1:
	222	case DA9052_ID_BUCK2:
	223	case DA9052_ID_BUCK3:
	224	case DA9052_ID_LDO2:
	225	case DA9052_ID_LDO3:
	226	ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
	227	info->activate_bit, info->activate_bit);
	228	break;
	229	}
08bf1c0a AJ	230
	231	return ret;
	232	}
	233
0ec446ea	234	static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
08bf1c0a AJ	235	{
	236	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	237	struct da9052_regulator_info *info = regulator->info;
	238	int offset = rdev_get_id(rdev);
	239	int ret;
	240
	241	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	242	if (ret < 0)
	243	return ret;
	244
	245	ret &= ((1 << info->volt_shift) - 1);
	246
	247	return ret;
	248	}
	249
08bf1c0a	250	static struct regulator_ops da9052_dcdc_ops = {
0ec446ea	251	.set_voltage = da9052_regulator_set_voltage,
08bf1c0a AJ	252	.get_current_limit = da9052_dcdc_get_current_limit,
	253	.set_current_limit = da9052_dcdc_set_current_limit,
	254
	255	.list_voltage = da9052_list_voltage,
	256	.get_voltage_sel = da9052_get_regulator_voltage_sel,
0d481f74 AL	257	.is_enabled = regulator_is_enabled_regmap,
	258	.enable = regulator_enable_regmap,
	259	.disable = regulator_disable_regmap,
08bf1c0a AJ	260	};
08bf1c0a AJ	261
08bf1c0a	262	static struct regulator_ops da9052_ldo_ops = {
0ec446ea	263	.set_voltage = da9052_regulator_set_voltage,
08bf1c0a AJ	264
	265	.list_voltage = da9052_list_voltage,
	266	.get_voltage_sel = da9052_get_regulator_voltage_sel,
0d481f74 AL	267	.is_enabled = regulator_is_enabled_regmap,
	268	.enable = regulator_enable_regmap,
	269	.disable = regulator_disable_regmap,
08bf1c0a AJ	270	};
08bf1c0a AJ	271
08bf1c0a AJ	272	#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
	273	{\
	274	.reg_desc = {\
9210f05b	275	.name = #_id,\
08bf1c0a AJ	276	.ops = &da9052_ldo_ops,\
08bf1c0a AJ	277	.type = REGULATOR_VOLTAGE,\
9210f05b	278	.id = DA9052_ID_##_id,\
7b957654	279	.n_voltages = (max - min) / step + 1, \
08bf1c0a	280	.owner = THIS_MODULE,\
0d481f74 AL	281	.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
0d481f74 AL	282	.enable_mask = 1 << (ebits),\
08bf1c0a AJ	283	},\
	284	.min_uV = (min) * 1000,\
	285	.max_uV = (max) * 1000,\
	286	.step_uV = (step) * 1000,\
	287	.volt_shift = (sbits),\
08bf1c0a AJ	288	.activate_bit = (abits),\
	289	}
	290
	291	#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
	292	{\
	293	.reg_desc = {\
9210f05b	294	.name = #_id,\
08bf1c0a AJ	295	.ops = &da9052_dcdc_ops,\
08bf1c0a AJ	296	.type = REGULATOR_VOLTAGE,\
9210f05b	297	.id = DA9052_ID_##_id,\
7b957654	298	.n_voltages = (max - min) / step + 1, \
08bf1c0a	299	.owner = THIS_MODULE,\
0d481f74 AL	300	.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
0d481f74 AL	301	.enable_mask = 1 << (ebits),\
08bf1c0a AJ	302	},\
	303	.min_uV = (min) * 1000,\
	304	.max_uV = (max) * 1000,\
	305	.step_uV = (step) * 1000,\
	306	.volt_shift = (sbits),\
08bf1c0a AJ	307	.activate_bit = (abits),\
	308	}
	309
6242eae9	310	static struct da9052_regulator_info da9052_regulator_info[] = {
9210f05b AL	311	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	312	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	313	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
0ec446ea	314	DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
9210f05b	315	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
0ec446ea AL	316	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
0ec446ea AL	317	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
9210f05b AL	318	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	319	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	320	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	321	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	322	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	323	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	324	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	325	};
08bf1c0a AJ	326
6242eae9	327	static struct da9052_regulator_info da9053_regulator_info[] = {
9210f05b AL	328	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	329	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	330	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
0ec446ea	331	DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
9210f05b	332	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
0ec446ea AL	333	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
0ec446ea AL	334	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
9210f05b AL	335	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	336	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	337	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	338	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	339	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	340	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	341	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	342	};
	343
	344	static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
	345	int id)
	346	{
	347	struct da9052_regulator_info *info;
	348	int i;
	349
984b5a6b AJ	350	switch (chip_id) {
984b5a6b AJ	351	case DA9052:
08bf1c0a AJ	352	for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
	353	info = &da9052_regulator_info[i];
	354	if (info->reg_desc.id == id)
	355	return info;
	356	}
984b5a6b AJ	357	break;
	358	case DA9053_AA:
	359	case DA9053_BA:
	360	case DA9053_BB:
08bf1c0a AJ	361	for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
	362	info = &da9053_regulator_info[i];
	363	if (info->reg_desc.id == id)
	364	return info;
	365	}
984b5a6b	366	break;
08bf1c0a AJ	367	}
	368
	369	return NULL;
	370	}
	371
	372	static int __devinit da9052_regulator_probe(struct platform_device *pdev)
	373	{
c172708d	374	struct regulator_config config = { };
08bf1c0a AJ	375	struct da9052_regulator *regulator;
	376	struct da9052 *da9052;
	377	struct da9052_pdata *pdata;
08bf1c0a	378
984b5a6b AJ	379	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
984b5a6b AJ	380	GFP_KERNEL);
08bf1c0a AJ	381	if (!regulator)
	382	return -ENOMEM;
	383
	384	da9052 = dev_get_drvdata(pdev->dev.parent);
	385	pdata = da9052->dev->platform_data;
	386	regulator->da9052 = da9052;
	387
	388	regulator->info = find_regulator_info(regulator->da9052->chip_id,
	389	pdev->id);
	390	if (regulator->info == NULL) {
	391	dev_err(&pdev->dev, "invalid regulator ID specified\n");
7eb6444f	392	return -EINVAL;
08bf1c0a	393	}
c172708d MB	394
c172708d MB	395	config.dev = &pdev->dev;
c172708d	396	config.driver_data = regulator;
0d481f74	397	config.regmap = da9052->regmap;
88c84c14 YCLP	398	if (pdata && pdata->regulators) {
	399	config.init_data = pdata->regulators[pdev->id];
	400	} else {
	401	#ifdef CONFIG_OF
	402	struct device_node *nproot = da9052->dev->of_node;
	403	struct device_node *np;
	404
	405	if (!nproot)
	406	return -ENODEV;
	407
	408	nproot = of_find_node_by_name(nproot, "regulators");
	409	if (!nproot)
	410	return -ENODEV;
	411
	412	for (np = of_get_next_child(nproot, NULL); !np;
	413	np = of_get_next_child(nproot, np)) {
	414	if (!of_node_cmp(np->name,
	415	regulator->info->reg_desc.name)) {
	416	config.init_data = of_get_regulator_init_data(
	417	&pdev->dev, np);
	418	break;
	419	}
	420	}
	421	#endif
	422	}
c172708d	423
08bf1c0a	424	regulator->rdev = regulator_register(&regulator->info->reg_desc,
c172708d	425	&config);
08bf1c0a AJ	426	if (IS_ERR(regulator->rdev)) {
	427	dev_err(&pdev->dev, "failed to register regulator %s\n",
	428	regulator->info->reg_desc.name);
7eb6444f	429	return PTR_ERR(regulator->rdev);
08bf1c0a AJ	430	}
	431
	432	platform_set_drvdata(pdev, regulator);
	433
	434	return 0;
08bf1c0a AJ	435	}
	436
	437	static int __devexit da9052_regulator_remove(struct platform_device *pdev)
	438	{
	439	struct da9052_regulator *regulator = platform_get_drvdata(pdev);
	440
	441	regulator_unregister(regulator->rdev);
08bf1c0a AJ	442	return 0;
	443	}
	444
	445	static struct platform_driver da9052_regulator_driver = {
	446	.probe = da9052_regulator_probe,
	447	.remove = __devexit_p(da9052_regulator_remove),
	448	.driver = {
	449	.name = "da9052-regulator",
	450	.owner = THIS_MODULE,
	451	},
	452	};
	453
	454	static int __init da9052_regulator_init(void)
	455	{
	456	return platform_driver_register(&da9052_regulator_driver);
	457	}
	458	subsys_initcall(da9052_regulator_init);
	459
	460	static void __exit da9052_regulator_exit(void)
	461	{
	462	platform_driver_unregister(&da9052_regulator_driver);
	463	}
	464	module_exit(da9052_regulator_exit);
	465
	466	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	467	MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
	468	MODULE_LICENSE("GPL");
	469	MODULE_ALIAS("platform:da9052-regulator");