[linux-block.git] / drivers / regulator / bd70528-regulator.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 ROHM Semiconductors
// bd70528-regulator.c ROHM BD70528MWV regulator driver

#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/rohm-bd70528.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>

#define BUCK_RAMPRATE_250MV 0
#define BUCK_RAMPRATE_125MV 1
#define BUCK_RAMP_MAX 250

static const struct regulator_linear_range bd70528_buck1_volts[] = {
	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 600000),
	REGULATOR_LINEAR_RANGE(2750000, 0x2, 0xf, 50000),
};
static const struct regulator_linear_range bd70528_buck2_volts[] = {
	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 300000),
	REGULATOR_LINEAR_RANGE(1550000, 0x2, 0xd, 50000),
	REGULATOR_LINEAR_RANGE(3000000, 0xe, 0xf, 300000),
};
static const struct regulator_linear_range bd70528_buck3_volts[] = {
	REGULATOR_LINEAR_RANGE(800000, 0x00, 0xd, 50000),
	REGULATOR_LINEAR_RANGE(1800000, 0xe, 0xf, 0),
};

/* All LDOs have same voltage ranges */
static const struct regulator_linear_range bd70528_ldo_volts[] = {
	REGULATOR_LINEAR_RANGE(1650000, 0x0, 0x07, 50000),
	REGULATOR_LINEAR_RANGE(2100000, 0x8, 0x0f, 100000),
	REGULATOR_LINEAR_RANGE(2850000, 0x10, 0x19, 50000),
	REGULATOR_LINEAR_RANGE(3300000, 0x19, 0x1f, 0),
};

/* Also both LEDs support same voltages */
static const unsigned int led_volts[] = {
	20000, 30000
};

static int bd70528_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
	if (ramp_delay > 0 && ramp_delay <= BUCK_RAMP_MAX) {
		unsigned int ramp_value = BUCK_RAMPRATE_250MV;

		if (ramp_delay <= 125)
			ramp_value = BUCK_RAMPRATE_125MV;

		return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
				  BD70528_MASK_BUCK_RAMP,
				  ramp_value << BD70528_SIFT_BUCK_RAMP);
	}
	dev_err(&rdev->dev, "%s: ramp_delay: %d not supported\n",
		rdev->desc->name, ramp_delay);
	return -EINVAL;
}

static int bd70528_led_set_voltage_sel(struct regulator_dev *rdev,
				       unsigned int sel)
{
	int ret;

	ret = regulator_is_enabled_regmap(rdev);
	if (ret < 0)
		return ret;

	if (ret == 0)
		return regulator_set_voltage_sel_regmap(rdev, sel);

	dev_err(&rdev->dev,
		"LED voltage change not allowed when led is enabled\n");

	return -EBUSY;
}

static const struct regulator_ops bd70528_buck_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_ramp_delay = bd70528_set_ramp_delay,
};

static const struct regulator_ops bd70528_ldo_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_ramp_delay = bd70528_set_ramp_delay,
};

static const struct regulator_ops bd70528_led_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.set_voltage_sel = bd70528_led_set_voltage_sel,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
};

static const struct regulator_desc bd70528_desc[] = {
	{
		.name = "buck1",
		.of_match = of_match_ptr("BUCK1"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_BUCK1,
		.ops = &bd70528_buck_ops,
		.type = REGULATOR_VOLTAGE,
		.linear_ranges = bd70528_buck1_volts,
		.n_linear_ranges = ARRAY_SIZE(bd70528_buck1_volts),
		.n_voltages = BD70528_BUCK_VOLTS,
		.enable_reg = BD70528_REG_BUCK1_EN,
		.enable_mask = BD70528_MASK_RUN_EN,
		.vsel_reg = BD70528_REG_BUCK1_VOLT,
		.vsel_mask = BD70528_MASK_BUCK_VOLT,
		.owner = THIS_MODULE,
	},
	{
		.name = "buck2",
		.of_match = of_match_ptr("BUCK2"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_BUCK2,
		.ops = &bd70528_buck_ops,
		.type = REGULATOR_VOLTAGE,
		.linear_ranges = bd70528_buck2_volts,
		.n_linear_ranges = ARRAY_SIZE(bd70528_buck2_volts),
		.n_voltages = BD70528_BUCK_VOLTS,
		.enable_reg = BD70528_REG_BUCK2_EN,
		.enable_mask = BD70528_MASK_RUN_EN,
		.vsel_reg = BD70528_REG_BUCK2_VOLT,
		.vsel_mask = BD70528_MASK_BUCK_VOLT,
		.owner = THIS_MODULE,
	},
	{
		.name = "buck3",
		.of_match = of_match_ptr("BUCK3"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_BUCK3,
		.ops = &bd70528_buck_ops,
		.type = REGULATOR_VOLTAGE,
		.linear_ranges = bd70528_buck3_volts,
		.n_linear_ranges = ARRAY_SIZE(bd70528_buck3_volts),
		.n_voltages = BD70528_BUCK_VOLTS,
		.enable_reg = BD70528_REG_BUCK3_EN,
		.enable_mask = BD70528_MASK_RUN_EN,
		.vsel_reg = BD70528_REG_BUCK3_VOLT,
		.vsel_mask = BD70528_MASK_BUCK_VOLT,
		.owner = THIS_MODULE,
	},
	{
		.name = "ldo1",
		.of_match = of_match_ptr("LDO1"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_LDO1,
		.ops = &bd70528_ldo_ops,
		.type = REGULATOR_VOLTAGE,
		.linear_ranges = bd70528_ldo_volts,
		.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
		.n_voltages = BD70528_LDO_VOLTS,
		.enable_reg = BD70528_REG_LDO1_EN,
		.enable_mask = BD70528_MASK_RUN_EN,
		.vsel_reg = BD70528_REG_LDO1_VOLT,
		.vsel_mask = BD70528_MASK_LDO_VOLT,
		.owner = THIS_MODULE,
	},
	{
		.name = "ldo2",
		.of_match = of_match_ptr("LDO2"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_LDO2,
		.ops = &bd70528_ldo_ops,
		.type = REGULATOR_VOLTAGE,
		.linear_ranges = bd70528_ldo_volts,
		.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
		.n_voltages = BD70528_LDO_VOLTS,
		.enable_reg = BD70528_REG_LDO2_EN,
		.enable_mask = BD70528_MASK_RUN_EN,
		.vsel_reg = BD70528_REG_LDO2_VOLT,
		.vsel_mask = BD70528_MASK_LDO_VOLT,
		.owner = THIS_MODULE,
	},
	{
		.name = "ldo3",
		.of_match = of_match_ptr("LDO3"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_LDO3,
		.ops = &bd70528_ldo_ops,
		.type = REGULATOR_VOLTAGE,
		.linear_ranges = bd70528_ldo_volts,
		.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
		.n_voltages = BD70528_LDO_VOLTS,
		.enable_reg = BD70528_REG_LDO3_EN,
		.enable_mask = BD70528_MASK_RUN_EN,
		.vsel_reg = BD70528_REG_LDO3_VOLT,
		.vsel_mask = BD70528_MASK_LDO_VOLT,
		.owner = THIS_MODULE,
	},
	{
		.name = "ldo_led1",
		.of_match = of_match_ptr("LDO_LED1"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_LED1,
		.ops = &bd70528_led_ops,
		.type = REGULATOR_VOLTAGE,
		.volt_table = &led_volts[0],
		.n_voltages = ARRAY_SIZE(led_volts),
		.enable_reg = BD70528_REG_LED_EN,
		.enable_mask = BD70528_MASK_LED1_EN,
		.vsel_reg = BD70528_REG_LED_VOLT,
		.vsel_mask = BD70528_MASK_LED1_VOLT,
		.owner = THIS_MODULE,
	},
	{
		.name = "ldo_led2",
		.of_match = of_match_ptr("LDO_LED2"),
		.regulators_node = of_match_ptr("regulators"),
		.id = BD70528_LED2,
		.ops = &bd70528_led_ops,
		.type = REGULATOR_VOLTAGE,
		.volt_table = &led_volts[0],
		.n_voltages = ARRAY_SIZE(led_volts),
		.enable_reg = BD70528_REG_LED_EN,
		.enable_mask = BD70528_MASK_LED2_EN,
		.vsel_reg = BD70528_REG_LED_VOLT,
		.vsel_mask = BD70528_MASK_LED2_VOLT,
		.owner = THIS_MODULE,
	},

};

static int bd70528_probe(struct platform_device *pdev)
{
	struct rohm_regmap_dev *bd70528;
	int i;
	struct regulator_config config = {
		.dev = pdev->dev.parent,
	};

	bd70528 = dev_get_drvdata(pdev->dev.parent);
	if (!bd70528) {
		dev_err(&pdev->dev, "No MFD driver data\n");
		return -EINVAL;
	}

	config.regmap = bd70528->regmap;

	for (i = 0; i < ARRAY_SIZE(bd70528_desc); i++) {
		struct regulator_dev *rdev;

		rdev = devm_regulator_register(&pdev->dev, &bd70528_desc[i],
					       &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev,
				"failed to register %s regulator\n",
				bd70528_desc[i].name);
			return PTR_ERR(rdev);
		}
	}
	return 0;
}

static struct platform_driver bd70528_regulator = {
	.driver = {
		.name = "bd70528-pmic"
	},
	.probe = bd70528_probe,
};

module_platform_driver(bd70528_regulator);

MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("BD70528 voltage regulator driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
99ea37bd MV	1	// SPDX-License-Identifier: GPL-2.0
	2	// Copyright (C) 2018 ROHM Semiconductors
	3	// bd70528-regulator.c ROHM BD70528MWV regulator driver
	4
	5	#include <linux/delay.h>
	6	#include <linux/err.h>
	7	#include <linux/gpio.h>
	8	#include <linux/interrupt.h>
	9	#include <linux/kernel.h>
	10	#include <linux/mfd/rohm-bd70528.h>
	11	#include <linux/module.h>
	12	#include <linux/of.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/regmap.h>
	15	#include <linux/regulator/driver.h>
	16	#include <linux/regulator/machine.h>
	17	#include <linux/regulator/of_regulator.h>
	18	#include <linux/slab.h>
	19
	20	#define BUCK_RAMPRATE_250MV 0
	21	#define BUCK_RAMPRATE_125MV 1
	22	#define BUCK_RAMP_MAX 250
	23
08f15f4a	24	static const struct regulator_linear_range bd70528_buck1_volts[] = {
99ea37bd MV	25	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 600000),
	26	REGULATOR_LINEAR_RANGE(2750000, 0x2, 0xf, 50000),
	27	};
08f15f4a	28	static const struct regulator_linear_range bd70528_buck2_volts[] = {
99ea37bd MV	29	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 300000),
	30	REGULATOR_LINEAR_RANGE(1550000, 0x2, 0xd, 50000),
	31	REGULATOR_LINEAR_RANGE(3000000, 0xe, 0xf, 300000),
	32	};
08f15f4a	33	static const struct regulator_linear_range bd70528_buck3_volts[] = {
99ea37bd MV	34	REGULATOR_LINEAR_RANGE(800000, 0x00, 0xd, 50000),
	35	REGULATOR_LINEAR_RANGE(1800000, 0xe, 0xf, 0),
	36	};
	37
	38	/* All LDOs have same voltage ranges */
08f15f4a	39	static const struct regulator_linear_range bd70528_ldo_volts[] = {
99ea37bd MV	40	REGULATOR_LINEAR_RANGE(1650000, 0x0, 0x07, 50000),
	41	REGULATOR_LINEAR_RANGE(2100000, 0x8, 0x0f, 100000),
	42	REGULATOR_LINEAR_RANGE(2850000, 0x10, 0x19, 50000),
	43	REGULATOR_LINEAR_RANGE(3300000, 0x19, 0x1f, 0),
	44	};
	45
	46	/* Also both LEDs support same voltages */
	47	static const unsigned int led_volts[] = {
	48	20000, 30000
	49	};
	50
	51	static int bd70528_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	52	{
	53	if (ramp_delay > 0 && ramp_delay <= BUCK_RAMP_MAX) {
	54	unsigned int ramp_value = BUCK_RAMPRATE_250MV;
	55
	56	if (ramp_delay <= 125)
	57	ramp_value = BUCK_RAMPRATE_125MV;
	58
	59	return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
	60	BD70528_MASK_BUCK_RAMP,
	61	ramp_value << BD70528_SIFT_BUCK_RAMP);
	62	}
	63	dev_err(&rdev->dev, "%s: ramp_delay: %d not supported\n",
	64	rdev->desc->name, ramp_delay);
	65	return -EINVAL;
	66	}
	67
	68	static int bd70528_led_set_voltage_sel(struct regulator_dev *rdev,
	69	unsigned int sel)
	70	{
	71	int ret;
	72
	73	ret = regulator_is_enabled_regmap(rdev);
	74	if (ret < 0)
	75	return ret;
	76
	77	if (ret == 0)
	78	return regulator_set_voltage_sel_regmap(rdev, sel);
	79
	80	dev_err(&rdev->dev,
	81	"LED voltage change not allowed when led is enabled\n");
	82
	83	return -EBUSY;
	84	}
	85
08f15f4a	86	static const struct regulator_ops bd70528_buck_ops = {
99ea37bd MV	87	.enable = regulator_enable_regmap,
	88	.disable = regulator_disable_regmap,
	89	.is_enabled = regulator_is_enabled_regmap,
	90	.list_voltage = regulator_list_voltage_linear_range,
	91	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	92	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	93	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	94	.set_ramp_delay = bd70528_set_ramp_delay,
	95	};
	96
08f15f4a	97	static const struct regulator_ops bd70528_ldo_ops = {
99ea37bd MV	98	.enable = regulator_enable_regmap,
	99	.disable = regulator_disable_regmap,
	100	.is_enabled = regulator_is_enabled_regmap,
	101	.list_voltage = regulator_list_voltage_linear_range,
	102	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	103	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	104	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	105	.set_ramp_delay = bd70528_set_ramp_delay,
	106	};
	107
08f15f4a	108	static const struct regulator_ops bd70528_led_ops = {
99ea37bd MV	109	.enable = regulator_enable_regmap,
	110	.disable = regulator_disable_regmap,
	111	.is_enabled = regulator_is_enabled_regmap,
	112	.list_voltage = regulator_list_voltage_table,
	113	.set_voltage_sel = bd70528_led_set_voltage_sel,
	114	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	115	};
	116
08f15f4a	117	static const struct regulator_desc bd70528_desc[] = {
99ea37bd MV	118	{
	119	.name = "buck1",
	120	.of_match = of_match_ptr("BUCK1"),
	121	.regulators_node = of_match_ptr("regulators"),
	122	.id = BD70528_BUCK1,
	123	.ops = &bd70528_buck_ops,
	124	.type = REGULATOR_VOLTAGE,
	125	.linear_ranges = bd70528_buck1_volts,
	126	.n_linear_ranges = ARRAY_SIZE(bd70528_buck1_volts),
	127	.n_voltages = BD70528_BUCK_VOLTS,
	128	.enable_reg = BD70528_REG_BUCK1_EN,
	129	.enable_mask = BD70528_MASK_RUN_EN,
	130	.vsel_reg = BD70528_REG_BUCK1_VOLT,
	131	.vsel_mask = BD70528_MASK_BUCK_VOLT,
	132	.owner = THIS_MODULE,
	133	},
	134	{
	135	.name = "buck2",
	136	.of_match = of_match_ptr("BUCK2"),
	137	.regulators_node = of_match_ptr("regulators"),
	138	.id = BD70528_BUCK2,
	139	.ops = &bd70528_buck_ops,
	140	.type = REGULATOR_VOLTAGE,
	141	.linear_ranges = bd70528_buck2_volts,
	142	.n_linear_ranges = ARRAY_SIZE(bd70528_buck2_volts),
	143	.n_voltages = BD70528_BUCK_VOLTS,
	144	.enable_reg = BD70528_REG_BUCK2_EN,
	145	.enable_mask = BD70528_MASK_RUN_EN,
	146	.vsel_reg = BD70528_REG_BUCK2_VOLT,
	147	.vsel_mask = BD70528_MASK_BUCK_VOLT,
	148	.owner = THIS_MODULE,
	149	},
	150	{
	151	.name = "buck3",
	152	.of_match = of_match_ptr("BUCK3"),
	153	.regulators_node = of_match_ptr("regulators"),
	154	.id = BD70528_BUCK3,
	155	.ops = &bd70528_buck_ops,
	156	.type = REGULATOR_VOLTAGE,
	157	.linear_ranges = bd70528_buck3_volts,
	158	.n_linear_ranges = ARRAY_SIZE(bd70528_buck3_volts),
	159	.n_voltages = BD70528_BUCK_VOLTS,
	160	.enable_reg = BD70528_REG_BUCK3_EN,
	161	.enable_mask = BD70528_MASK_RUN_EN,
	162	.vsel_reg = BD70528_REG_BUCK3_VOLT,
	163	.vsel_mask = BD70528_MASK_BUCK_VOLT,
	164	.owner = THIS_MODULE,
	165	},
	166	{
	167	.name = "ldo1",
	168	.of_match = of_match_ptr("LDO1"),
	169	.regulators_node = of_match_ptr("regulators"),
	170	.id = BD70528_LDO1,
	171	.ops = &bd70528_ldo_ops,
	172	.type = REGULATOR_VOLTAGE,
	173	.linear_ranges = bd70528_ldo_volts,
	174	.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
	175	.n_voltages = BD70528_LDO_VOLTS,
	176	.enable_reg = BD70528_REG_LDO1_EN,
	177	.enable_mask = BD70528_MASK_RUN_EN,
	178	.vsel_reg = BD70528_REG_LDO1_VOLT,
	179	.vsel_mask = BD70528_MASK_LDO_VOLT,
	180	.owner = THIS_MODULE,
	181	},
182	{
183	.name = "ldo2",
184	.of_match = of_match_ptr("LDO2"),
185	.regulators_node = of_match_ptr("regulators"),
186	.id = BD70528_LDO2,
187	.ops = &bd70528_ldo_ops,
188	.type = REGULATOR_VOLTAGE,
189	.linear_ranges = bd70528_ldo_volts,
190	.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
191	.n_voltages = BD70528_LDO_VOLTS,
192	.enable_reg = BD70528_REG_LDO2_EN,
193	.enable_mask = BD70528_MASK_RUN_EN,
194	.vsel_reg = BD70528_REG_LDO2_VOLT,
195	.vsel_mask = BD70528_MASK_LDO_VOLT,
196	.owner = THIS_MODULE,
197	},
198	{
199	.name = "ldo3",
200	.of_match = of_match_ptr("LDO3"),
201	.regulators_node = of_match_ptr("regulators"),
202	.id = BD70528_LDO3,
203	.ops = &bd70528_ldo_ops,
204	.type = REGULATOR_VOLTAGE,
205	.linear_ranges = bd70528_ldo_volts,
206	.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
207	.n_voltages = BD70528_LDO_VOLTS,
208	.enable_reg = BD70528_REG_LDO3_EN,
209	.enable_mask = BD70528_MASK_RUN_EN,
210	.vsel_reg = BD70528_REG_LDO3_VOLT,
211	.vsel_mask = BD70528_MASK_LDO_VOLT,
212	.owner = THIS_MODULE,
213	},
214	{
215	.name = "ldo_led1",
216	.of_match = of_match_ptr("LDO_LED1"),
217	.regulators_node = of_match_ptr("regulators"),
218	.id = BD70528_LED1,
219	.ops = &bd70528_led_ops,
220	.type = REGULATOR_VOLTAGE,
221	.volt_table = &led_volts[0],
222	.n_voltages = ARRAY_SIZE(led_volts),
223	.enable_reg = BD70528_REG_LED_EN,
224	.enable_mask = BD70528_MASK_LED1_EN,
225	.vsel_reg = BD70528_REG_LED_VOLT,
226	.vsel_mask = BD70528_MASK_LED1_VOLT,
227	.owner = THIS_MODULE,
228	},
229	{
230	.name = "ldo_led2",
231	.of_match = of_match_ptr("LDO_LED2"),
232	.regulators_node = of_match_ptr("regulators"),
233	.id = BD70528_LED2,
234	.ops = &bd70528_led_ops,
235	.type = REGULATOR_VOLTAGE,
236	.volt_table = &led_volts[0],
237	.n_voltages = ARRAY_SIZE(led_volts),
238	.enable_reg = BD70528_REG_LED_EN,
239	.enable_mask = BD70528_MASK_LED2_EN,
240	.vsel_reg = BD70528_REG_LED_VOLT,
241	.vsel_mask = BD70528_MASK_LED2_VOLT,
242	.owner = THIS_MODULE,
243	},
244
245	};
246
247	static int bd70528_probe(struct platform_device *pdev)
248	{
e3233d7f	249	struct rohm_regmap_dev *bd70528;
99ea37bd MV	250	int i;
	251	struct regulator_config config = {
	252	.dev = pdev->dev.parent,
	253	};
	254
	255	bd70528 = dev_get_drvdata(pdev->dev.parent);
	256	if (!bd70528) {
	257	dev_err(&pdev->dev, "No MFD driver data\n");
	258	return -EINVAL;
	259	}
	260
e3233d7f	261	config.regmap = bd70528->regmap;
99ea37bd MV	262
	263	for (i = 0; i < ARRAY_SIZE(bd70528_desc); i++) {
	264	struct regulator_dev *rdev;
	265
	266	rdev = devm_regulator_register(&pdev->dev, &bd70528_desc[i],
	267	&config);
	268	if (IS_ERR(rdev)) {
	269	dev_err(&pdev->dev,
	270	"failed to register %s regulator\n",
	271	bd70528_desc[i].name);
	272	return PTR_ERR(rdev);
	273	}
	274	}
	275	return 0;
	276	}
	277
	278	static struct platform_driver bd70528_regulator = {
	279	.driver = {
	280	.name = "bd70528-pmic"
	281	},
	282	.probe = bd70528_probe,
	283	};
	284
	285	module_platform_driver(bd70528_regulator);
	286
	287	MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
	288	MODULE_DESCRIPTION("BD70528 voltage regulator driver");
	289	MODULE_LICENSE("GPL");