[GitHub/mt8127/android_kernel_alcatel_ttab.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/of.h>
#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 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 = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
		if (da9052_current_limits[row][i] <= max_uA) {
			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_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 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,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
};

static 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,
	.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,\
		.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, 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,\
		.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, 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_each_child_of_node(nproot, np) {
			if (!of_node_cmp(np->name,
					 regulator->info->reg_desc.name)) {
				config.init_data = of_get_regulator_init_data(
					&pdev->dev, np);
				config.of_node = 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 = 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	22	#ifdef CONFIG_OF
cd22a965	23	#include <linux/of.h>
88c84c14 YCLP	24	#include <linux/regulator/of_regulator.h>
88c84c14 YCLP	25	#endif
08bf1c0a AJ	26
	27	#include <linux/mfd/da9052/da9052.h>
	28	#include <linux/mfd/da9052/reg.h>
	29	#include <linux/mfd/da9052/pdata.h>
	30
	31	/* Buck step size */
	32	#define DA9052_BUCK_PERI_3uV_STEP 100000
	33	#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
	34	#define DA9052_CONST_3uV 3000000
	35
	36	#define DA9052_MIN_UA 0
	37	#define DA9052_MAX_UA 3
	38	#define DA9052_CURRENT_RANGE 4
	39
	40	/* Bit masks */
	41	#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
	42	#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
	43
9210f05b AL	44	/* DA9052 REGULATOR IDs */
	45	#define DA9052_ID_BUCK1 0
	46	#define DA9052_ID_BUCK2 1
	47	#define DA9052_ID_BUCK3 2
	48	#define DA9052_ID_BUCK4 3
	49	#define DA9052_ID_LDO1 4
	50	#define DA9052_ID_LDO2 5
	51	#define DA9052_ID_LDO3 6
	52	#define DA9052_ID_LDO4 7
	53	#define DA9052_ID_LDO5 8
	54	#define DA9052_ID_LDO6 9
	55	#define DA9052_ID_LDO7 10
	56	#define DA9052_ID_LDO8 11
	57	#define DA9052_ID_LDO9 12
	58	#define DA9052_ID_LDO10 13
	59
08bf1c0a AJ	60	static const u32 da9052_current_limits[3][4] = {
	61	{700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
	62	{1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
	63	{800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
	64	* BUCK-MEM and BUCK-PERI
	65	*/
	66	};
	67
	68	struct da9052_regulator_info {
	69	struct regulator_desc reg_desc;
	70	int step_uV;
	71	int min_uV;
	72	int max_uV;
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
19d23c21 AL	136	for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
19d23c21 AL	137	if (da9052_current_limits[row][i] <= max_uA) {
08bf1c0a AJ	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
4923b48b AL	182	static int da9052_map_voltage(struct regulator_dev *rdev,
4923b48b AL	183	int min_uV, int max_uV)
08bf1c0a AJ	184	{
	185	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	186	struct da9052_regulator_info *info = regulator->info;
0ec446ea	187	int id = rdev_get_id(rdev);
4923b48b	188	int ret, sel;
08bf1c0a AJ	189
	190	ret = verify_range(info, min_uV, max_uV);
	191	if (ret < 0)
	192	return ret;
	193
	194	if (min_uV < info->min_uV)
	195	min_uV = info->min_uV;
	196
0ec446ea AL	197	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
0ec446ea AL	198	&& (min_uV >= DA9052_CONST_3uV)) {
4923b48b AL	199	sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
	200	DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
	201	DA9052_BUCK_PERI_3uV_STEP);
0ec446ea	202	} else {
4923b48b	203	sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
0ec446ea	204	}
08bf1c0a	205
4923b48b	206	ret = da9052_list_voltage(rdev, sel);
08bf1c0a AJ	207	if (ret < 0)
	208	return ret;
	209
4923b48b AL	210	return sel;
	211	}
	212
	213	static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev,
	214	unsigned int selector)
	215	{
	216	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	217	struct da9052_regulator_info *info = regulator->info;
	218	int id = rdev_get_id(rdev);
	219	int ret;
	220
09812bc4	221	ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
4923b48b	222	rdev->desc->vsel_mask, selector);
08bf1c0a AJ	223	if (ret < 0)
	224	return ret;
	225
0ec446ea AL	226	/* Some LDOs and DCDCs are DVC controlled which requires enabling of
	227	* the activate bit to implment the changes on the output.
	228	*/
	229	switch (id) {
	230	case DA9052_ID_BUCK1:
	231	case DA9052_ID_BUCK2:
	232	case DA9052_ID_BUCK3:
	233	case DA9052_ID_LDO2:
	234	case DA9052_ID_LDO3:
	235	ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
	236	info->activate_bit, info->activate_bit);
	237	break;
	238	}
08bf1c0a AJ	239
	240	return ret;
	241	}
	242
08bf1c0a	243	static struct regulator_ops da9052_dcdc_ops = {
08bf1c0a AJ	244	.get_current_limit = da9052_dcdc_get_current_limit,
	245	.set_current_limit = da9052_dcdc_set_current_limit,
	246
	247	.list_voltage = da9052_list_voltage,
4923b48b	248	.map_voltage = da9052_map_voltage,
09812bc4	249	.get_voltage_sel = regulator_get_voltage_sel_regmap,
4923b48b	250	.set_voltage_sel = da9052_regulator_set_voltage_sel,
0d481f74 AL	251	.is_enabled = regulator_is_enabled_regmap,
	252	.enable = regulator_enable_regmap,
	253	.disable = regulator_disable_regmap,
08bf1c0a AJ	254	};
08bf1c0a AJ	255
08bf1c0a	256	static struct regulator_ops da9052_ldo_ops = {
08bf1c0a	257	.list_voltage = da9052_list_voltage,
4923b48b	258	.map_voltage = da9052_map_voltage,
09812bc4	259	.get_voltage_sel = regulator_get_voltage_sel_regmap,
4923b48b	260	.set_voltage_sel = da9052_regulator_set_voltage_sel,
0d481f74 AL	261	.is_enabled = regulator_is_enabled_regmap,
	262	.enable = regulator_enable_regmap,
	263	.disable = regulator_disable_regmap,
08bf1c0a AJ	264	};
08bf1c0a AJ	265
08bf1c0a AJ	266	#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
	267	{\
	268	.reg_desc = {\
9210f05b	269	.name = #_id,\
08bf1c0a AJ	270	.ops = &da9052_ldo_ops,\
08bf1c0a AJ	271	.type = REGULATOR_VOLTAGE,\
9210f05b	272	.id = DA9052_ID_##_id,\
7b957654	273	.n_voltages = (max - min) / step + 1, \
08bf1c0a	274	.owner = THIS_MODULE,\
09812bc4 AL	275	.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
09812bc4 AL	276	.vsel_mask = (1 << (sbits)) - 1,\
0d481f74 AL	277	.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
0d481f74 AL	278	.enable_mask = 1 << (ebits),\
08bf1c0a AJ	279	},\
	280	.min_uV = (min) * 1000,\
	281	.max_uV = (max) * 1000,\
	282	.step_uV = (step) * 1000,\
08bf1c0a AJ	283	.activate_bit = (abits),\
	284	}
	285
	286	#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
	287	{\
	288	.reg_desc = {\
9210f05b	289	.name = #_id,\
08bf1c0a AJ	290	.ops = &da9052_dcdc_ops,\
08bf1c0a AJ	291	.type = REGULATOR_VOLTAGE,\
9210f05b	292	.id = DA9052_ID_##_id,\
7b957654	293	.n_voltages = (max - min) / step + 1, \
08bf1c0a	294	.owner = THIS_MODULE,\
09812bc4 AL	295	.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
09812bc4 AL	296	.vsel_mask = (1 << (sbits)) - 1,\
0d481f74 AL	297	.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
0d481f74 AL	298	.enable_mask = 1 << (ebits),\
08bf1c0a AJ	299	},\
	300	.min_uV = (min) * 1000,\
	301	.max_uV = (max) * 1000,\
	302	.step_uV = (step) * 1000,\
08bf1c0a AJ	303	.activate_bit = (abits),\
	304	}
	305
6242eae9	306	static struct da9052_regulator_info da9052_regulator_info[] = {
9210f05b AL	307	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	308	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	309	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
0ec446ea	310	DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
9210f05b	311	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
0ec446ea AL	312	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
0ec446ea AL	313	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
9210f05b AL	314	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	315	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	316	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	317	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	318	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	319	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	320	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	321	};
08bf1c0a AJ	322
6242eae9	323	static struct da9052_regulator_info da9053_regulator_info[] = {
9210f05b AL	324	DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	325	DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	326	DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
0ec446ea	327	DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
9210f05b	328	DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
0ec446ea AL	329	DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
0ec446ea AL	330	DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
9210f05b AL	331	DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
	332	DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
	333	DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
	334	DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
	335	DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
	336	DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
	337	DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
08bf1c0a AJ	338	};
	339
	340	static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
	341	int id)
	342	{
	343	struct da9052_regulator_info *info;
	344	int i;
	345
984b5a6b AJ	346	switch (chip_id) {
984b5a6b AJ	347	case DA9052:
08bf1c0a AJ	348	for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
	349	info = &da9052_regulator_info[i];
	350	if (info->reg_desc.id == id)
	351	return info;
	352	}
984b5a6b AJ	353	break;
	354	case DA9053_AA:
	355	case DA9053_BA:
	356	case DA9053_BB:
08bf1c0a AJ	357	for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
	358	info = &da9053_regulator_info[i];
	359	if (info->reg_desc.id == id)
	360	return info;
	361	}
984b5a6b	362	break;
08bf1c0a AJ	363	}
	364
	365	return NULL;
	366	}
	367
	368	static int __devinit da9052_regulator_probe(struct platform_device *pdev)
	369	{
c172708d	370	struct regulator_config config = { };
08bf1c0a AJ	371	struct da9052_regulator *regulator;
	372	struct da9052 *da9052;
	373	struct da9052_pdata *pdata;
08bf1c0a	374
984b5a6b AJ	375	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
984b5a6b AJ	376	GFP_KERNEL);
08bf1c0a AJ	377	if (!regulator)
	378	return -ENOMEM;
	379
	380	da9052 = dev_get_drvdata(pdev->dev.parent);
	381	pdata = da9052->dev->platform_data;
	382	regulator->da9052 = da9052;
	383
	384	regulator->info = find_regulator_info(regulator->da9052->chip_id,
	385	pdev->id);
	386	if (regulator->info == NULL) {
	387	dev_err(&pdev->dev, "invalid regulator ID specified\n");
7eb6444f	388	return -EINVAL;
08bf1c0a	389	}
c172708d MB	390
c172708d MB	391	config.dev = &pdev->dev;
c172708d	392	config.driver_data = regulator;
0d481f74	393	config.regmap = da9052->regmap;
88c84c14 YCLP	394	if (pdata && pdata->regulators) {
	395	config.init_data = pdata->regulators[pdev->id];
	396	} else {
	397	#ifdef CONFIG_OF
	398	struct device_node *nproot = da9052->dev->of_node;
	399	struct device_node *np;
	400
	401	if (!nproot)
	402	return -ENODEV;
	403
	404	nproot = of_find_node_by_name(nproot, "regulators");
	405	if (!nproot)
	406	return -ENODEV;
	407
b86bbddd	408	for_each_child_of_node(nproot, np) {
88c84c14 YCLP	409	if (!of_node_cmp(np->name,
	410	regulator->info->reg_desc.name)) {
	411	config.init_data = of_get_regulator_init_data(
	412	&pdev->dev, np);
e76b9cc7	413	config.of_node = np;
88c84c14 YCLP	414	break;
	415	}
	416	}
	417	#endif
	418	}
c172708d	419
08bf1c0a	420	regulator->rdev = regulator_register(&regulator->info->reg_desc,
c172708d	421	&config);
08bf1c0a AJ	422	if (IS_ERR(regulator->rdev)) {
	423	dev_err(&pdev->dev, "failed to register regulator %s\n",
	424	regulator->info->reg_desc.name);
7eb6444f	425	return PTR_ERR(regulator->rdev);
08bf1c0a AJ	426	}
	427
	428	platform_set_drvdata(pdev, regulator);
	429
	430	return 0;
08bf1c0a AJ	431	}
	432
	433	static int __devexit da9052_regulator_remove(struct platform_device *pdev)
	434	{
	435	struct da9052_regulator *regulator = platform_get_drvdata(pdev);
	436
	437	regulator_unregister(regulator->rdev);
08bf1c0a AJ	438	return 0;
	439	}
	440
	441	static struct platform_driver da9052_regulator_driver = {
	442	.probe = da9052_regulator_probe,
5eb9f2b9	443	.remove = da9052_regulator_remove,
08bf1c0a AJ	444	.driver = {
	445	.name = "da9052-regulator",
	446	.owner = THIS_MODULE,
	447	},
	448	};
	449
	450	static int __init da9052_regulator_init(void)
	451	{
	452	return platform_driver_register(&da9052_regulator_driver);
	453	}
	454	subsys_initcall(da9052_regulator_init);
	455
	456	static void __exit da9052_regulator_exit(void)
	457	{
	458	platform_driver_unregister(&da9052_regulator_driver);
	459	}
	460	module_exit(da9052_regulator_exit);
	461
	462	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	463	MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
	464	MODULE_LICENSE("GPL");
	465	MODULE_ALIAS("platform:da9052-regulator");