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

// SPDX-License-Identifier: GPL-2.0+
//
// da9052-regulator.c: Regulator driver for DA9052
//
// Copyright(c) 2011 Dialog Semiconductor Ltd.
//
// Author: David Dajun Chen <dchen@diasemi.com>

#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/of.h>
#include <linux/regulator/of_regulator.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 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;

	for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
		if ((min_uA <= da9052_current_limits[row][i]) &&
		    (da9052_current_limits[row][i] <= max_uA)) {
			reg_val = i;
			break;
		}
	}

	if (i < 0)
		return -EINVAL;

	/* 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_map_voltage(struct regulator_dev *rdev,
			      int min_uV, int max_uV)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int id = rdev_get_id(rdev);
	int ret, sel;

	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)) {
			sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
			      DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
					   DA9052_BUCK_PERI_3uV_STEP);
	} else {
		sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
	}

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

	return sel;
}

static int da9052_regulator_set_voltage_sel(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 ret;

	ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
				rdev->desc->vsel_mask, 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_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
						 unsigned int old_sel,
						 unsigned int new_sel)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int id = rdev_get_id(rdev);
	int ret = 0;

	/* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling
	 * the activate bit.
	 */
	switch (id) {
	case DA9052_ID_BUCK1:
	case DA9052_ID_BUCK2:
	case DA9052_ID_BUCK3:
	case DA9052_ID_LDO2:
	case DA9052_ID_LDO3:
		ret = (new_sel - old_sel) * info->step_uV / 6250;
		break;
	}

	return ret;
}

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

	.list_voltage = da9052_list_voltage,
	.map_voltage = da9052_map_voltage,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = da9052_regulator_set_voltage_sel,
	.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
};

static const struct regulator_ops da9052_ldo_ops = {
	.list_voltage = da9052_list_voltage,
	.map_voltage = da9052_map_voltage,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = da9052_regulator_set_voltage_sel,
	.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
};

#define DA9052_LDO(_id, _name, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = #_name,\
		.of_match = of_match_ptr(#_name),\
		.regulators_node = of_match_ptr("regulators"),\
		.ops = &da9052_ldo_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = DA9052_ID_##_id,\
		.n_voltages = (max - min) / step + 1, \
		.owner = THIS_MODULE,\
		.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
		.vsel_mask = (1 << (sbits)) - 1,\
		.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
		.enable_mask = 1 << (ebits),\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.activate_bit = (abits),\
}

#define DA9052_DCDC(_id, _name, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = #_name,\
		.of_match = of_match_ptr(#_name),\
		.regulators_node = of_match_ptr("regulators"),\
		.ops = &da9052_dcdc_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = DA9052_ID_##_id,\
		.n_voltages = (max - min) / step + 1, \
		.owner = THIS_MODULE,\
		.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
		.vsel_mask = (1 << (sbits)) - 1,\
		.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
		.enable_mask = 1 << (ebits),\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.activate_bit = (abits),\
}

static struct da9052_regulator_info da9052_regulator_info[] = {
	DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
	DA9052_DCDC(BUCK4, buck4, 50, 1800, 3600, 5, 6, 0),
	DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
	DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
	DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
	DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0),
};

static struct da9052_regulator_info da9053_regulator_info[] = {
	DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
	DA9052_DCDC(BUCK4, buck4, 25, 950, 2525, 6, 6, 0),
	DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
	DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
	DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
	DA9052_LDO(LDO10, 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:
	case DA9053_BC:
		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 da9052_regulator_probe(struct platform_device *pdev)
{
	const struct mfd_cell *cell = mfd_get_cell(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 = dev_get_platdata(da9052->dev);
	regulator->da9052 = da9052;

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

	config.dev = da9052->dev;
	config.driver_data = regulator;
	config.regmap = da9052->regmap;
	if (pdata)
		config.init_data = pdata->regulators[cell->id];

	regulator->rdev = devm_regulator_register(&pdev->dev,
						  &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 struct platform_driver da9052_regulator_driver = {
	.probe = da9052_regulator_probe,
	.driver = {
		.name = "da9052-regulator",
	},
};

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
fd2f02f9 AL	1	// SPDX-License-Identifier: GPL-2.0+
	2	//
	3	// da9052-regulator.c: Regulator driver for DA9052
	4	//
	5	// Copyright(c) 2011 Dialog Semiconductor Ltd.
	6	//
	7	// Author: David Dajun Chen <dchen@diasemi.com>
08bf1c0a AJ	8
	9	#include <linux/module.h>
	10	#include <linux/moduleparam.h>
	11	#include <linux/init.h>
	12	#include <linux/err.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/regulator/driver.h>
	15	#include <linux/regulator/machine.h>
cd22a965	16	#include <linux/of.h>
88c84c14	17	#include <linux/regulator/of_regulator.h>
08bf1c0a AJ	18
	19	#include <linux/mfd/da9052/da9052.h>
	20	#include <linux/mfd/da9052/reg.h>
	21	#include <linux/mfd/da9052/pdata.h>
	22
	23	/* Buck step size */
	24	#define DA9052_BUCK_PERI_3uV_STEP 100000
	25	#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
	26	#define DA9052_CONST_3uV 3000000
	27
	28	#define DA9052_MIN_UA 0
	29	#define DA9052_MAX_UA 3
	30	#define DA9052_CURRENT_RANGE 4
	31
	32	/* Bit masks */
	33	#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
	34	#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
	35
9210f05b AL	36	/* DA9052 REGULATOR IDs */
	37	#define DA9052_ID_BUCK1 0
	38	#define DA9052_ID_BUCK2 1
	39	#define DA9052_ID_BUCK3 2
	40	#define DA9052_ID_BUCK4 3
	41	#define DA9052_ID_LDO1 4
	42	#define DA9052_ID_LDO2 5
	43	#define DA9052_ID_LDO3 6
	44	#define DA9052_ID_LDO4 7
	45	#define DA9052_ID_LDO5 8
	46	#define DA9052_ID_LDO6 9
	47	#define DA9052_ID_LDO7 10
	48	#define DA9052_ID_LDO8 11
	49	#define DA9052_ID_LDO9 12
	50	#define DA9052_ID_LDO10 13
	51
08bf1c0a AJ	52	static const u32 da9052_current_limits[3][4] = {
	53	{700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
	54	{1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
	55	{800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
	56	* BUCK-MEM and BUCK-PERI
	57	*/
	58	};
	59
	60	struct da9052_regulator_info {
	61	struct regulator_desc reg_desc;
	62	int step_uV;
	63	int min_uV;
	64	int max_uV;
d706b1e4	65	unsigned char activate_bit;
08bf1c0a AJ	66	};
	67
	68	struct da9052_regulator {
	69	struct da9052 *da9052;
	70	struct da9052_regulator_info *info;
	71	struct regulator_dev *rdev;
	72	};
	73
	74	static int verify_range(struct da9052_regulator_info *info,
	75	int min_uV, int max_uV)
	76	{
	77	if (min_uV > info->max_uV \|\| max_uV < info->min_uV)
	78	return -EINVAL;
	79
	80	return 0;
	81	}
	82
08bf1c0a AJ	83	static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
	84	{
	85	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	86	int offset = rdev_get_id(rdev);
	87	int ret, row = 2;
	88
	89	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
	90	if (ret < 0)
	91	return ret;
	92
	93	/* Determine the even or odd position of the buck current limit
	94	* register field
	95	*/
	96	if (offset % 2 == 0)
	97	ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
	98	else
	99	ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
	100
	101	/* Select the appropriate current limit range */
	102	if (regulator->da9052->chip_id == DA9052)
	103	row = 0;
	104	else if (offset == 0)
	105	row = 1;
	106
	107	return da9052_current_limits[row][ret];
	108	}
	109
	110	static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
	111	int max_uA)
	112	{
	113	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	114	int offset = rdev_get_id(rdev);
	115	int reg_val = 0;
	116	int i, row = 2;
	117
	118	/* Select the appropriate current limit range */
	119	if (regulator->da9052->chip_id == DA9052)
	120	row = 0;
	121	else if (offset == 0)
	122	row = 1;
	123
19d23c21	124	for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
1e369bcd AL	125	if ((min_uA <= da9052_current_limits[row][i]) &&
1e369bcd AL	126	(da9052_current_limits[row][i] <= max_uA)) {
08bf1c0a AJ	127	reg_val = i;
	128	break;
	129	}
	130	}
	131
1e369bcd AL	132	if (i < 0)
	133	return -EINVAL;
	134
08bf1c0a AJ	135	/* Determine the even or odd position of the buck current limit
	136	* register field
	137	*/
	138	if (offset % 2 == 0)
	139	return da9052_reg_update(regulator->da9052,
	140	DA9052_BUCKA_REG + offset/2,
	141	DA9052_BUCK_ILIM_MASK_EVEN,
	142	reg_val << 2);
	143	else
	144	return da9052_reg_update(regulator->da9052,
	145	DA9052_BUCKA_REG + offset/2,
	146	DA9052_BUCK_ILIM_MASK_ODD,
	147	reg_val << 6);
	148	}
	149
08bf1c0a AJ	150	static int da9052_list_voltage(struct regulator_dev *rdev,
	151	unsigned int selector)
	152	{
	153	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	154	struct da9052_regulator_info *info = regulator->info;
0ec446ea	155	int id = rdev_get_id(rdev);
08bf1c0a AJ	156	int volt_uV;
08bf1c0a AJ	157
0ec446ea AL	158	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
	159	&& (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
	160	volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
	161	+ info->min_uV);
	162	volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
	163	* (DA9052_BUCK_PERI_3uV_STEP);
	164	} else {
	165	volt_uV = (selector * info->step_uV) + info->min_uV;
	166	}
08bf1c0a AJ	167
	168	if (volt_uV > info->max_uV)
	169	return -EINVAL;
	170
	171	return volt_uV;
	172	}
	173
4923b48b AL	174	static int da9052_map_voltage(struct regulator_dev *rdev,
4923b48b AL	175	int min_uV, int max_uV)
08bf1c0a AJ	176	{
	177	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	178	struct da9052_regulator_info *info = regulator->info;
0ec446ea	179	int id = rdev_get_id(rdev);
4923b48b	180	int ret, sel;
08bf1c0a AJ	181
	182	ret = verify_range(info, min_uV, max_uV);
	183	if (ret < 0)
	184	return ret;
	185
	186	if (min_uV < info->min_uV)
	187	min_uV = info->min_uV;
	188
0ec446ea AL	189	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
0ec446ea AL	190	&& (min_uV >= DA9052_CONST_3uV)) {
4923b48b AL	191	sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
	192	DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
	193	DA9052_BUCK_PERI_3uV_STEP);
0ec446ea	194	} else {
4923b48b	195	sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
0ec446ea	196	}
08bf1c0a	197
4923b48b	198	ret = da9052_list_voltage(rdev, sel);
08bf1c0a AJ	199	if (ret < 0)
	200	return ret;
	201
4923b48b AL	202	return sel;
	203	}
	204
d706b1e4 AL	205	static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev,
	206	unsigned int selector)
	207	{
	208	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	209	struct da9052_regulator_info *info = regulator->info;
	210	int id = rdev_get_id(rdev);
	211	int ret;
	212
	213	ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
	214	rdev->desc->vsel_mask, selector);
	215	if (ret < 0)
	216	return ret;
	217
	218	/* Some LDOs and DCDCs are DVC controlled which requires enabling of
	219	* the activate bit to implment the changes on the output.
	220	*/
	221	switch (id) {
	222	case DA9052_ID_BUCK1:
	223	case DA9052_ID_BUCK2:
	224	case DA9052_ID_BUCK3:
	225	case DA9052_ID_LDO2:
	226	case DA9052_ID_LDO3:
	227	ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
	228	info->activate_bit, info->activate_bit);
	229	break;
	230	}
	231
	232	return ret;
	233	}
	234
5c99a7b1 PZ	235	static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
	236	unsigned int old_sel,
	237	unsigned int new_sel)
	238	{
	239	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	240	struct da9052_regulator_info *info = regulator->info;
	241	int id = rdev_get_id(rdev);
	242	int ret = 0;
	243
	244	/* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling
	245	* the activate bit.
	246	*/
	247	switch (id) {
	248	case DA9052_ID_BUCK1:
	249	case DA9052_ID_BUCK2:
	250	case DA9052_ID_BUCK3:
	251	case DA9052_ID_LDO2:
	252	case DA9052_ID_LDO3:
	253	ret = (new_sel - old_sel) * info->step_uV / 6250;
	254	break;
	255	}
	256
	257	return ret;
	258	}
	259
71242b49	260	static const struct regulator_ops da9052_dcdc_ops = {
08bf1c0a AJ	261	.get_current_limit = da9052_dcdc_get_current_limit,
	262	.set_current_limit = da9052_dcdc_set_current_limit,
	263
	264	.list_voltage = da9052_list_voltage,
4923b48b	265	.map_voltage = da9052_map_voltage,
09812bc4	266	.get_voltage_sel = regulator_get_voltage_sel_regmap,
d706b1e4	267	.set_voltage_sel = da9052_regulator_set_voltage_sel,
5c99a7b1	268	.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
0d481f74 AL	269	.is_enabled = regulator_is_enabled_regmap,
	270	.enable = regulator_enable_regmap,
	271	.disable = regulator_disable_regmap,
08bf1c0a AJ	272	};
08bf1c0a AJ	273
71242b49	274	static const struct regulator_ops da9052_ldo_ops = {
08bf1c0a	275	.list_voltage = da9052_list_voltage,
4923b48b	276	.map_voltage = da9052_map_voltage,
09812bc4	277	.get_voltage_sel = regulator_get_voltage_sel_regmap,
d706b1e4	278	.set_voltage_sel = da9052_regulator_set_voltage_sel,
5c99a7b1	279	.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
0d481f74 AL	280	.is_enabled = regulator_is_enabled_regmap,
	281	.enable = regulator_enable_regmap,
	282	.disable = regulator_disable_regmap,
08bf1c0a AJ	283	};
08bf1c0a AJ	284
45460fe9	285	#define DA9052_LDO(_id, _name, step, min, max, sbits, ebits, abits) \
08bf1c0a AJ	286	{\
08bf1c0a AJ	287	.reg_desc = {\
45460fe9	288	.name = #_name,\
67ddc68a AL	289	.of_match = of_match_ptr(#_name),\
67ddc68a AL	290	.regulators_node = of_match_ptr("regulators"),\
08bf1c0a AJ	291	.ops = &da9052_ldo_ops,\
08bf1c0a AJ	292	.type = REGULATOR_VOLTAGE,\
9210f05b	293	.id = DA9052_ID_##_id,\
7b957654	294	.n_voltages = (max - min) / step + 1, \
08bf1c0a	295	.owner = THIS_MODULE,\
09812bc4 AL	296	.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
09812bc4 AL	297	.vsel_mask = (1 << (sbits)) - 1,\
0d481f74 AL	298	.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
0d481f74 AL	299	.enable_mask = 1 << (ebits),\
08bf1c0a AJ	300	},\
	301	.min_uV = (min) * 1000,\
	302	.max_uV = (max) * 1000,\
	303	.step_uV = (step) * 1000,\
d706b1e4	304	.activate_bit = (abits),\
08bf1c0a AJ	305	}
08bf1c0a AJ	306
45460fe9	307	#define DA9052_DCDC(_id, _name, step, min, max, sbits, ebits, abits) \
08bf1c0a AJ	308	{\
08bf1c0a AJ	309	.reg_desc = {\
45460fe9	310	.name = #_name,\
67ddc68a AL	311	.of_match = of_match_ptr(#_name),\
67ddc68a AL	312	.regulators_node = of_match_ptr("regulators"),\
08bf1c0a AJ	313	.ops = &da9052_dcdc_ops,\
08bf1c0a AJ	314	.type = REGULATOR_VOLTAGE,\
9210f05b	315	.id = DA9052_ID_##_id,\
7b957654	316	.n_voltages = (max - min) / step + 1, \
08bf1c0a	317	.owner = THIS_MODULE,\
09812bc4 AL	318	.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
09812bc4 AL	319	.vsel_mask = (1 << (sbits)) - 1,\
0d481f74 AL	320	.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
0d481f74 AL	321	.enable_mask = 1 << (ebits),\
08bf1c0a AJ	322	},\
	323	.min_uV = (min) * 1000,\
	324	.max_uV = (max) * 1000,\
	325	.step_uV = (step) * 1000,\
d706b1e4	326	.activate_bit = (abits),\
08bf1c0a AJ	327	}
08bf1c0a AJ	328
6242eae9	329	static struct da9052_regulator_info da9052_regulator_info[] = {
45460fe9 RH	330	DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	331	DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	332	DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
	333	DA9052_DCDC(BUCK4, buck4, 50, 1800, 3600, 5, 6, 0),
	334	DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
	335	DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	336	DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	337	DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
	338	DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
	339	DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
	340	DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
	341	DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
	342	DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
	343	DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	344	};
08bf1c0a AJ	345
6242eae9	346	static struct da9052_regulator_info da9053_regulator_info[] = {
45460fe9 RH	347	DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	348	DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	349	DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
	350	DA9052_DCDC(BUCK4, buck4, 25, 950, 2525, 6, 6, 0),
	351	DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
	352	DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	353	DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	354	DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
	355	DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
	356	DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
	357	DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
	358	DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
	359	DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
	360	DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	361	};
	362
	363	static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
	364	int id)
	365	{
	366	struct da9052_regulator_info *info;
	367	int i;
	368
984b5a6b AJ	369	switch (chip_id) {
984b5a6b AJ	370	case DA9052:
08bf1c0a AJ	371	for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
	372	info = &da9052_regulator_info[i];
	373	if (info->reg_desc.id == id)
	374	return info;
	375	}
984b5a6b AJ	376	break;
	377	case DA9053_AA:
	378	case DA9053_BA:
	379	case DA9053_BB:
8b708144	380	case DA9053_BC:
08bf1c0a AJ	381	for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
	382	info = &da9053_regulator_info[i];
	383	if (info->reg_desc.id == id)
	384	return info;
	385	}
984b5a6b	386	break;
08bf1c0a AJ	387	}
	388
	389	return NULL;
	390	}
	391
a5023574	392	static int da9052_regulator_probe(struct platform_device *pdev)
08bf1c0a	393	{
e0c21530	394	const struct mfd_cell *cell = mfd_get_cell(pdev);
c172708d	395	struct regulator_config config = { };
08bf1c0a AJ	396	struct da9052_regulator *regulator;
	397	struct da9052 *da9052;
	398	struct da9052_pdata *pdata;
08bf1c0a	399
984b5a6b AJ	400	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
984b5a6b AJ	401	GFP_KERNEL);
08bf1c0a AJ	402	if (!regulator)
	403	return -ENOMEM;
	404
	405	da9052 = dev_get_drvdata(pdev->dev.parent);
dff91d0b	406	pdata = dev_get_platdata(da9052->dev);
08bf1c0a AJ	407	regulator->da9052 = da9052;
	408
	409	regulator->info = find_regulator_info(regulator->da9052->chip_id,
e0c21530	410	cell->id);
08bf1c0a AJ	411	if (regulator->info == NULL) {
08bf1c0a AJ	412	dev_err(&pdev->dev, "invalid regulator ID specified\n");
7eb6444f	413	return -EINVAL;
08bf1c0a	414	}
c172708d	415
67ddc68a	416	config.dev = da9052->dev;
c172708d	417	config.driver_data = regulator;
0d481f74	418	config.regmap = da9052->regmap;
67ddc68a	419	if (pdata)
e0c21530	420	config.init_data = pdata->regulators[cell->id];
c172708d	421
ea49a5eb AL	422	regulator->rdev = devm_regulator_register(&pdev->dev,
	423	&regulator->info->reg_desc,
	424	&config);
08bf1c0a AJ	425	if (IS_ERR(regulator->rdev)) {
	426	dev_err(&pdev->dev, "failed to register regulator %s\n",
	427	regulator->info->reg_desc.name);
7eb6444f	428	return PTR_ERR(regulator->rdev);
08bf1c0a AJ	429	}
	430
	431	platform_set_drvdata(pdev, regulator);
	432
	433	return 0;
08bf1c0a AJ	434	}
08bf1c0a AJ	435
08bf1c0a AJ	436	static struct platform_driver da9052_regulator_driver = {
08bf1c0a AJ	437	.probe = da9052_regulator_probe,
08bf1c0a AJ	438	.driver = {
08bf1c0a AJ	439	.name = "da9052-regulator",
08bf1c0a AJ	440	},
	441	};
	442
	443	static int __init da9052_regulator_init(void)
	444	{
	445	return platform_driver_register(&da9052_regulator_driver);
	446	}
	447	subsys_initcall(da9052_regulator_init);
	448
	449	static void __exit da9052_regulator_exit(void)
	450	{
	451	platform_driver_unregister(&da9052_regulator_driver);
	452	}
	453	module_exit(da9052_regulator_exit);
	454
	455	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	456	MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
	457	MODULE_LICENSE("GPL");
	458	MODULE_ALIAS("platform:da9052-regulator");