drivers/regulator/adp5055-regulator.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 //
 // Regulator driver for Analog Devices ADP5055
 //
 // Copyright (C) 2025 Analog Devices, Inc.

 #include <linux/bitfield.h>
 #include <linux/device.h>
 #include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>

 // ADP5055 Register Map.

 #define ADP5055_CTRL123         0xD1
 #define ADP5055_CTRL_MODE1      0xD3
 #define ADP5055_CTRL_MODE2      0xD4
 #define ADP5055_DLY0            0xD5
 #define ADP5055_DLY1            0xD6
 #define ADP5055_DLY2            0xD7
 #define ADP5055_VID0            0xD8
 #define ADP5055_VID1            0xD9
 #define ADP5055_VID2            0xDA
 #define ADP5055_DVS_LIM0        0xDC
 #define ADP5055_DVS_LIM1        0xDD
 #define ADP5055_DVS_LIM2        0xDE
 #define ADP5055_FT_CFG          0xDF
 #define ADP5055_PG_CFG          0xE0

 // ADP5055 Field Masks.

 #define	ADP5055_MASK_EN_MODE		BIT(0)
 #define	ADP5055_MASK_OCP_BLANKING	BIT(7)
 #define	ADP5055_MASK_PSM		BIT(4)
 #define	ADP5055_MASK_DIS2		BIT(2)
 #define	ADP5055_MASK_DIS1		BIT(1)
 #define	ADP5055_MASK_DIS0		BIT(0)
 #define	ADP5055_MASK_DIS_DLY		GENMASK(6, 4)
 #define	ADP5055_MASK_EN_DLY		GENMASK(2, 0)
 #define	ADP5055_MASK_DVS_LIM_UPPER	GENMASK(7, 4)
 #define	ADP5055_MASK_DVS_LIM_LOWER	GENMASK(3, 0)
 #define	ADP5055_MASK_FAST_TRANSIENT2	GENMASK(5, 4)
 #define	ADP5055_MASK_FAST_TRANSIENT1	GENMASK(3, 2)
 #define	ADP5055_MASK_FAST_TRANSIENT0	GENMASK(1, 0)
 #define	ADP5055_MASK_DLY_PWRGD		BIT(4)
 #define	ADP5055_MASK_PWRGD2		BIT(2)
 #define	ADP5055_MASK_PWRGD1		BIT(1)
 #define	ADP5055_MASK_PWRGD0		BIT(0)

 #define	ADP5055_MIN_VOUT		408000
 #define ADP5055_NUM_CH			3

 struct adp5055 {
 	struct device *dev;
 	struct regmap *regmap;
 	u32 tset;
 	struct gpio_desc *en_gpiod[ADP5055_NUM_CH];
 	bool en_mode_software;
 	int dvs_limit_upper[ADP5055_NUM_CH];
 	int dvs_limit_lower[ADP5055_NUM_CH];
 	u32 fast_transient[ADP5055_NUM_CH];
 	bool mask_power_good[ADP5055_NUM_CH];
 };

 static const unsigned int adp5055_tset_vals[] = {
 	2600,
 	20800,
 };

 static const unsigned int adp5055_enable_delay_vals_2_6[] = {
 	0,
 	2600,
 	5200,
 	7800,
 	10400,
 	13000,
 	15600,
 	18200,
 };

 static const unsigned int adp5055_enable_delay_vals_20_8[] = {
 	0,
 	20800,
 	41600,
 	62400,
 	83200,
 	104000,
 	124800,
 	145600,
 };

 static const char * const adp5055_fast_transient_vals[] = {
 	"none",
 	"3G_1.5%",
 	"5G_1.5%",
 	"5G_2.5%",
 };

 static int adp5055_get_prop_index(const u32 *table, size_t table_size,
 				  u32 value)
 {
 	int i;

 	for (i = 0; i < table_size; i++)
 		if (table[i] == value)
 			return i;

 	return -EINVAL;
 }

 static const struct regmap_range adp5055_reg_ranges[] = {
 	regmap_reg_range(0xD1, 0xE0),
 };

 static const struct regmap_access_table adp5055_access_ranges_table = {
 	.yes_ranges	= adp5055_reg_ranges,
 	.n_yes_ranges	= ARRAY_SIZE(adp5055_reg_ranges),
 };

 static const struct regmap_config adp5055_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = 0xE0,
 	.wr_table = &adp5055_access_ranges_table,
 	.rd_table = &adp5055_access_ranges_table,
 };

 static const struct linear_range adp5055_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(ADP5055_MIN_VOUT, 0, 255, 1500),
 };

 static int adp5055_parse_fw(struct device *dev, struct  adp5055 *adp5055)
 {
 	int i, ret;
 	struct regmap *regmap = adp5055->regmap;
 	int val;
 	bool ocp_blanking;
 	bool delay_power_good;

 	ret = device_property_read_u32(dev, "adi,tset-us", &adp5055->tset);
 	if (!ret) {
 		ret = adp5055_get_prop_index(adp5055_tset_vals,
 					ARRAY_SIZE(adp5055_tset_vals), adp5055->tset);
 		if (ret < 0)
 			return dev_err_probe(dev, ret,
 				"Failed to initialize tset.");
 		adp5055->tset = adp5055_tset_vals[ret];
 	}

 	ocp_blanking = device_property_read_bool(dev, "adi,ocp-blanking");

 	delay_power_good = device_property_read_bool(dev,
 				    "adi,delay-power-good");

 	for (i = 0; i < ADP5055_NUM_CH; i++) {
 		val = FIELD_PREP(ADP5055_MASK_DVS_LIM_UPPER,
 				DIV_ROUND_CLOSEST_ULL(192000 - adp5055->dvs_limit_upper[i], 12000));
 		val |= FIELD_PREP(ADP5055_MASK_DVS_LIM_LOWER,
 				DIV_ROUND_CLOSEST_ULL(adp5055->dvs_limit_lower[i] + 190500, 12000));
 		ret = regmap_write(regmap, ADP5055_DVS_LIM0 + i, val);
 		if (ret)
 			return ret;
 	}

 	val = FIELD_PREP(ADP5055_MASK_EN_MODE, adp5055->en_mode_software);
 	ret = regmap_write(regmap, ADP5055_CTRL_MODE1, val);
 	if (ret)
 		return ret;

 	val = FIELD_PREP(ADP5055_MASK_OCP_BLANKING, ocp_blanking);
 	ret = regmap_update_bits(regmap, ADP5055_CTRL_MODE2,
 				ADP5055_MASK_OCP_BLANKING, val);
 	if (ret)
 		return ret;

 	val = FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT2, adp5055->fast_transient[2]);
 	val |= FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT1, adp5055->fast_transient[1]);
 	val |= FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT0, adp5055->fast_transient[0]);
 	ret = regmap_write(regmap, ADP5055_FT_CFG, val);
 	if (ret)
 		return ret;

 	val = FIELD_PREP(ADP5055_MASK_DLY_PWRGD, delay_power_good);
 	val |= FIELD_PREP(ADP5055_MASK_PWRGD2, adp5055->mask_power_good[2]);
 	val |= FIELD_PREP(ADP5055_MASK_PWRGD1, adp5055->mask_power_good[1]);
 	val |= FIELD_PREP(ADP5055_MASK_PWRGD0, adp5055->mask_power_good[0]);
 	ret = regmap_write(regmap, ADP5055_PG_CFG, val);
 	if (ret)
 		return ret;

 	return 0;
 }

 static int adp5055_of_parse_cb(struct device_node *np,
 			      const struct regulator_desc *desc,
 			      struct regulator_config *config)
 {
 	struct adp5055 *adp5055 = config->driver_data;
 	int id, ret, pval, i;

 	id = desc->id;

 	if (of_property_read_bool(np, "enable-gpios")) {
 		adp5055->en_gpiod[id] = devm_fwnode_gpiod_get(config->dev,
 						of_fwnode_handle(np), "enable",
 						GPIOD_OUT_LOW, "enable");
 		if (IS_ERR(adp5055->en_gpiod[id]))
 			return dev_err_probe(config->dev, PTR_ERR(adp5055->en_gpiod[id]),
 					"Failed to get enable GPIO\n");

 		config->ena_gpiod = adp5055->en_gpiod[id];
 	} else {
 		adp5055->en_mode_software = true;
 	}

 	ret = of_property_read_u32(np, "adi,dvs-limit-upper-microvolt", &pval);
 	if (ret)
 		adp5055->dvs_limit_upper[id] = 192000;
 	else
 		adp5055->dvs_limit_upper[id] = pval;

 	if (adp5055->dvs_limit_upper[id] > 192000 || adp5055->dvs_limit_upper[id] < 12000)
 		return dev_err_probe(config->dev, adp5055->dvs_limit_upper[id],
 			"Out of range - dvs-limit-upper-microvolt value.");

 	ret = of_property_read_u32(np, "adi,dvs-limit-lower-microvolt", &pval);
 	if (ret)
 		adp5055->dvs_limit_lower[id] = -190500;
 	else
 		adp5055->dvs_limit_lower[id] = pval;

 	if (adp5055->dvs_limit_lower[id] > -10500 || adp5055->dvs_limit_lower[id] < -190500)
 		return dev_err_probe(config->dev, adp5055->dvs_limit_lower[id],
 			"Out of range - dvs-limit-lower-microvolt value.");

 	for (i = 0; i < 4; i++) {
 		ret = of_property_match_string(np, "adi,fast-transient",
 					adp5055_fast_transient_vals[i]);
 		if (!ret)
 			break;
 	}

 	if (ret < 0)
 		adp5055->fast_transient[id] = 3;
 	else
 		adp5055->fast_transient[id] = i;

 	adp5055->mask_power_good[id] = of_property_read_bool(np, "adi,mask-power-good");

 	return 0;
 }

 static int adp5055_set_mode(struct regulator_dev *rdev, u32 mode)
 {
 	struct adp5055 *adp5055 = rdev_get_drvdata(rdev);
 	int id, ret;

 	id = rdev_get_id(rdev);

 	switch (mode) {
 	case REGULATOR_MODE_NORMAL:
 		ret = regmap_update_bits(adp5055->regmap, ADP5055_CTRL_MODE2,
 					ADP5055_MASK_PSM << id, 0);
 		break;
 	case REGULATOR_MODE_IDLE:
 		ret = regmap_update_bits(adp5055->regmap, ADP5055_CTRL_MODE2,
 					ADP5055_MASK_PSM << id, ADP5055_MASK_PSM << id);
 		break;
 	default:
 		return dev_err_probe(&rdev->dev, -EINVAL,
 				"Unsupported mode: %d\n", mode);
 	}

 	return ret;
 }

 static unsigned int adp5055_get_mode(struct regulator_dev *rdev)
 {
 	struct adp5055 *adp5055 = rdev_get_drvdata(rdev);
 	int id, ret, regval;

 	id = rdev_get_id(rdev);

 	ret = regmap_read(adp5055->regmap, ADP5055_CTRL_MODE2, &regval);
 	if (ret)
 		return ret;

 	if (regval & (ADP5055_MASK_PSM << id))
 		return REGULATOR_MODE_IDLE;
 	else
 		return REGULATOR_MODE_NORMAL;
 }

 static const struct regulator_ops adp5055_ops = {
 	.list_voltage = regulator_list_voltage_linear_range,
 	.map_voltage = regulator_map_voltage_linear_range,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.set_active_discharge = regulator_set_active_discharge_regmap,
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.set_mode = adp5055_set_mode,
 	.get_mode = adp5055_get_mode,
 	.set_ramp_delay = regulator_set_ramp_delay_regmap,
 };

 #define ADP5055_REG_(_name, _id, _ch, _ops) \
 	[_id] = { \
 		.name = _name, \
 		.of_match = of_match_ptr(_name), \
 		.of_parse_cb = adp5055_of_parse_cb, \
 		.id = _id, \
 		.ops = _ops, \
 		.linear_ranges = adp5055_voltage_ranges, \
 		.n_linear_ranges = ARRAY_SIZE(adp5055_voltage_ranges), \
 		.vsel_reg = ADP5055_VID##_ch, \
 		.vsel_mask = GENMASK(7, 0), \
 		.enable_reg = ADP5055_CTRL123, \
 		.enable_mask = BIT(_ch), \
 		.active_discharge_on = ADP5055_MASK_DIS##_id, \
 		.active_discharge_off = 0, \
 		.active_discharge_mask = ADP5055_MASK_DIS##_id, \
 		.active_discharge_reg = ADP5055_CTRL_MODE2, \
 		.ramp_reg = ADP5055_DLY##_ch, \
 		.ramp_mask = ADP5055_MASK_EN_DLY, \
 		.n_ramp_values = ARRAY_SIZE(adp5055_enable_delay_vals_2_6), \
 		.type = REGULATOR_VOLTAGE, \
 		.owner = THIS_MODULE, \
 	}

 #define ADP5055_REG(_name, _id, _ch) \
 	ADP5055_REG_(_name, _id, _ch, &adp5055_ops)

 static struct regulator_desc adp5055_regulators[] = {
 	ADP5055_REG("buck0", 0, 0),
 	ADP5055_REG("buck1", 1, 1),
 	ADP5055_REG("buck2", 2, 2),
 };

 static int adp5055_probe(struct i2c_client *client)
 {
 	struct regulator_init_data *init_data;
 	struct device *dev = &client->dev;
 	struct adp5055 *adp5055;
 	int i, ret;

 	init_data = of_get_regulator_init_data(dev, client->dev.of_node,
 					       &adp5055_regulators[0]);
 	if (!init_data)
 		return -EINVAL;

 	adp5055 = devm_kzalloc(dev, sizeof(struct adp5055), GFP_KERNEL);
 	if (!adp5055)
 		return -ENOMEM;

 	adp5055->tset = 2600;
 	adp5055->en_mode_software = false;

 	adp5055->regmap = devm_regmap_init_i2c(client, &adp5055_regmap_config);
 	if (IS_ERR(adp5055->regmap))
 		return dev_err_probe(dev, PTR_ERR(adp5055->regmap), "Failed to allocate reg map");

 	for (i = 0; i < ADP5055_NUM_CH; i++) {
 		const struct regulator_desc *desc;
 		struct regulator_config config = { };
 		struct regulator_dev *rdev;

 		if (adp5055->tset == 2600)
 			adp5055_regulators[i].ramp_delay_table = adp5055_enable_delay_vals_2_6;
 		else
 			adp5055_regulators[i].ramp_delay_table = adp5055_enable_delay_vals_20_8;

 		desc = &adp5055_regulators[i];

 		config.dev = dev;
 		config.driver_data = adp5055;
 		config.regmap = adp5055->regmap;
 		config.init_data = init_data;

 		rdev = devm_regulator_register(dev, desc, &config);
 		if (IS_ERR(rdev)) {
 			return dev_err_probe(dev, PTR_ERR(rdev),
 					"Failed to register %s\n", desc->name);
 		}
 	}

 	ret = adp5055_parse_fw(dev, adp5055);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static const struct of_device_id adp5055_of_match[] = {
 	{ .compatible = "adi,adp5055", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, adp5055_of_match);

 static const struct i2c_device_id adp5055_ids[] = {
 	{ .name = "adp5055"},
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, adp5055_ids);

 static struct i2c_driver adp5055_driver = {
 	.driver	= {
 		.name	= "adp5055",
 		.of_match_table = adp5055_of_match,
 	},
 	.probe		= adp5055_probe,
 	.id_table	= adp5055_ids,
 };
 module_i2c_driver(adp5055_driver);

 MODULE_DESCRIPTION("ADP5055 Voltage Regulator Driver");
 MODULE_AUTHOR("Alexis Czezar Torreno <alexisczezar.torreno@analog.com>");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	//
	// Regulator driver for Analog Devices ADP5055
	//
	// Copyright (C) 2025 Analog Devices, Inc.

	#include <linux/bitfield.h>
	#include <linux/device.h>
	#include <linux/gpio/consumer.h>
	#include <linux/i2c.h>
	#include <linux/module.h>
	#include <linux/mod_devicetable.h>
	#include <linux/regmap.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/of_regulator.h>

	// ADP5055 Register Map.

	#define ADP5055_CTRL123 0xD1
	#define ADP5055_CTRL_MODE1 0xD3
	#define ADP5055_CTRL_MODE2 0xD4
	#define ADP5055_DLY0 0xD5
	#define ADP5055_DLY1 0xD6
	#define ADP5055_DLY2 0xD7
	#define ADP5055_VID0 0xD8
	#define ADP5055_VID1 0xD9
	#define ADP5055_VID2 0xDA
	#define ADP5055_DVS_LIM0 0xDC
	#define ADP5055_DVS_LIM1 0xDD
	#define ADP5055_DVS_LIM2 0xDE
	#define ADP5055_FT_CFG 0xDF
	#define ADP5055_PG_CFG 0xE0

	// ADP5055 Field Masks.

	#define ADP5055_MASK_EN_MODE BIT(0)
	#define ADP5055_MASK_OCP_BLANKING BIT(7)
	#define ADP5055_MASK_PSM BIT(4)
	#define ADP5055_MASK_DIS2 BIT(2)
	#define ADP5055_MASK_DIS1 BIT(1)
	#define ADP5055_MASK_DIS0 BIT(0)
	#define ADP5055_MASK_DIS_DLY GENMASK(6, 4)
	#define ADP5055_MASK_EN_DLY GENMASK(2, 0)
	#define ADP5055_MASK_DVS_LIM_UPPER GENMASK(7, 4)
	#define ADP5055_MASK_DVS_LIM_LOWER GENMASK(3, 0)
	#define ADP5055_MASK_FAST_TRANSIENT2 GENMASK(5, 4)
	#define ADP5055_MASK_FAST_TRANSIENT1 GENMASK(3, 2)
	#define ADP5055_MASK_FAST_TRANSIENT0 GENMASK(1, 0)
	#define ADP5055_MASK_DLY_PWRGD BIT(4)
	#define ADP5055_MASK_PWRGD2 BIT(2)
	#define ADP5055_MASK_PWRGD1 BIT(1)
	#define ADP5055_MASK_PWRGD0 BIT(0)

	#define ADP5055_MIN_VOUT 408000
	#define ADP5055_NUM_CH 3

	struct adp5055 {
	struct device *dev;
	struct regmap *regmap;
	u32 tset;
	struct gpio_desc *en_gpiod[ADP5055_NUM_CH];
	bool en_mode_software;
	int dvs_limit_upper[ADP5055_NUM_CH];
	int dvs_limit_lower[ADP5055_NUM_CH];
	u32 fast_transient[ADP5055_NUM_CH];
	bool mask_power_good[ADP5055_NUM_CH];
	};

	static const unsigned int adp5055_tset_vals[] = {
	2600,
	20800,
	};

	static const unsigned int adp5055_enable_delay_vals_2_6[] = {
	0,
	2600,
	5200,
	7800,
	10400,
	13000,
	15600,
	18200,
	};

	static const unsigned int adp5055_enable_delay_vals_20_8[] = {
	0,
	20800,
	41600,
	62400,
	83200,
	104000,
	124800,
	145600,
	};

	static const char * const adp5055_fast_transient_vals[] = {
	"none",
	"3G_1.5%",
	"5G_1.5%",
	"5G_2.5%",
	};

	static int adp5055_get_prop_index(const u32 *table, size_t table_size,
	u32 value)
	{
	int i;

	for (i = 0; i < table_size; i++)
	if (table[i] == value)
	return i;

	return -EINVAL;
	}

	static const struct regmap_range adp5055_reg_ranges[] = {
	regmap_reg_range(0xD1, 0xE0),
	};

	static const struct regmap_access_table adp5055_access_ranges_table = {
	.yes_ranges = adp5055_reg_ranges,
	.n_yes_ranges = ARRAY_SIZE(adp5055_reg_ranges),
	};

	static const struct regmap_config adp5055_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = 0xE0,
	.wr_table = &adp5055_access_ranges_table,
	.rd_table = &adp5055_access_ranges_table,
	};

	static const struct linear_range adp5055_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(ADP5055_MIN_VOUT, 0, 255, 1500),
	};

	static int adp5055_parse_fw(struct device dev, struct adp5055 adp5055)
	{
	int i, ret;
	struct regmap *regmap = adp5055->regmap;
	int val;
	bool ocp_blanking;
	bool delay_power_good;

	ret = device_property_read_u32(dev, "adi,tset-us", &adp5055->tset);
	if (!ret) {
	ret = adp5055_get_prop_index(adp5055_tset_vals,
	ARRAY_SIZE(adp5055_tset_vals), adp5055->tset);
	if (ret < 0)
	return dev_err_probe(dev, ret,
	"Failed to initialize tset.");
	adp5055->tset = adp5055_tset_vals[ret];
	}

	ocp_blanking = device_property_read_bool(dev, "adi,ocp-blanking");

	delay_power_good = device_property_read_bool(dev,
	"adi,delay-power-good");

	for (i = 0; i < ADP5055_NUM_CH; i++) {
	val = FIELD_PREP(ADP5055_MASK_DVS_LIM_UPPER,
	DIV_ROUND_CLOSEST_ULL(192000 - adp5055->dvs_limit_upper[i], 12000));
	val \|= FIELD_PREP(ADP5055_MASK_DVS_LIM_LOWER,
	DIV_ROUND_CLOSEST_ULL(adp5055->dvs_limit_lower[i] + 190500, 12000));
	ret = regmap_write(regmap, ADP5055_DVS_LIM0 + i, val);
	if (ret)
	return ret;
	}

	val = FIELD_PREP(ADP5055_MASK_EN_MODE, adp5055->en_mode_software);
	ret = regmap_write(regmap, ADP5055_CTRL_MODE1, val);
	if (ret)
	return ret;

	val = FIELD_PREP(ADP5055_MASK_OCP_BLANKING, ocp_blanking);
	ret = regmap_update_bits(regmap, ADP5055_CTRL_MODE2,
	ADP5055_MASK_OCP_BLANKING, val);
	if (ret)
	return ret;

	val = FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT2, adp5055->fast_transient[2]);
	val \|= FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT1, adp5055->fast_transient[1]);
	val \|= FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT0, adp5055->fast_transient[0]);
	ret = regmap_write(regmap, ADP5055_FT_CFG, val);
	if (ret)
	return ret;

	val = FIELD_PREP(ADP5055_MASK_DLY_PWRGD, delay_power_good);
	val \|= FIELD_PREP(ADP5055_MASK_PWRGD2, adp5055->mask_power_good[2]);
	val \|= FIELD_PREP(ADP5055_MASK_PWRGD1, adp5055->mask_power_good[1]);
	val \|= FIELD_PREP(ADP5055_MASK_PWRGD0, adp5055->mask_power_good[0]);
	ret = regmap_write(regmap, ADP5055_PG_CFG, val);
	if (ret)
	return ret;

	return 0;
	}

	static int adp5055_of_parse_cb(struct device_node *np,
	const struct regulator_desc *desc,
	struct regulator_config *config)
	{
	struct adp5055 *adp5055 = config->driver_data;
	int id, ret, pval, i;

	id = desc->id;

	if (of_property_read_bool(np, "enable-gpios")) {
	adp5055->en_gpiod[id] = devm_fwnode_gpiod_get(config->dev,
	of_fwnode_handle(np), "enable",
	GPIOD_OUT_LOW, "enable");
	if (IS_ERR(adp5055->en_gpiod[id]))
	return dev_err_probe(config->dev, PTR_ERR(adp5055->en_gpiod[id]),
	"Failed to get enable GPIO\n");

	config->ena_gpiod = adp5055->en_gpiod[id];
	} else {
	adp5055->en_mode_software = true;
	}

	ret = of_property_read_u32(np, "adi,dvs-limit-upper-microvolt", &pval);
	if (ret)
	adp5055->dvs_limit_upper[id] = 192000;
	else
	adp5055->dvs_limit_upper[id] = pval;

	if (adp5055->dvs_limit_upper[id] > 192000 \|\| adp5055->dvs_limit_upper[id] < 12000)
	return dev_err_probe(config->dev, adp5055->dvs_limit_upper[id],
	"Out of range - dvs-limit-upper-microvolt value.");

	ret = of_property_read_u32(np, "adi,dvs-limit-lower-microvolt", &pval);
	if (ret)
	adp5055->dvs_limit_lower[id] = -190500;
	else
	adp5055->dvs_limit_lower[id] = pval;

	if (adp5055->dvs_limit_lower[id] > -10500 \|\| adp5055->dvs_limit_lower[id] < -190500)
	return dev_err_probe(config->dev, adp5055->dvs_limit_lower[id],
	"Out of range - dvs-limit-lower-microvolt value.");

	for (i = 0; i < 4; i++) {
	ret = of_property_match_string(np, "adi,fast-transient",
	adp5055_fast_transient_vals[i]);
	if (!ret)
	break;
	}

	if (ret < 0)
	adp5055->fast_transient[id] = 3;
	else
	adp5055->fast_transient[id] = i;

	adp5055->mask_power_good[id] = of_property_read_bool(np, "adi,mask-power-good");

	return 0;
	}

	static int adp5055_set_mode(struct regulator_dev *rdev, u32 mode)
	{
	struct adp5055 *adp5055 = rdev_get_drvdata(rdev);
	int id, ret;

	id = rdev_get_id(rdev);

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
	ret = regmap_update_bits(adp5055->regmap, ADP5055_CTRL_MODE2,
	ADP5055_MASK_PSM << id, 0);
	break;
	case REGULATOR_MODE_IDLE:
	ret = regmap_update_bits(adp5055->regmap, ADP5055_CTRL_MODE2,
	ADP5055_MASK_PSM << id, ADP5055_MASK_PSM << id);
	break;
	default:
	return dev_err_probe(&rdev->dev, -EINVAL,
	"Unsupported mode: %d\n", mode);
	}

	return ret;
	}

	static unsigned int adp5055_get_mode(struct regulator_dev *rdev)
	{
	struct adp5055 *adp5055 = rdev_get_drvdata(rdev);
	int id, ret, regval;

	id = rdev_get_id(rdev);

	ret = regmap_read(adp5055->regmap, ADP5055_CTRL_MODE2, &regval);
	if (ret)
	return ret;

	if (regval & (ADP5055_MASK_PSM << id))
	return REGULATOR_MODE_IDLE;
	else
	return REGULATOR_MODE_NORMAL;
	}

	static const struct regulator_ops adp5055_ops = {
	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_active_discharge = regulator_set_active_discharge_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_mode = adp5055_set_mode,
	.get_mode = adp5055_get_mode,
	.set_ramp_delay = regulator_set_ramp_delay_regmap,
	};

	#define ADP5055_REG_(_name, _id, _ch, _ops) \
	[_id] = { \
	.name = _name, \
	.of_match = of_match_ptr(_name), \
	.of_parse_cb = adp5055_of_parse_cb, \
	.id = _id, \
	.ops = _ops, \
	.linear_ranges = adp5055_voltage_ranges, \
	.n_linear_ranges = ARRAY_SIZE(adp5055_voltage_ranges), \
	.vsel_reg = ADP5055_VID##_ch, \
	.vsel_mask = GENMASK(7, 0), \
	.enable_reg = ADP5055_CTRL123, \
	.enable_mask = BIT(_ch), \
	.active_discharge_on = ADP5055_MASK_DIS##_id, \
	.active_discharge_off = 0, \
	.active_discharge_mask = ADP5055_MASK_DIS##_id, \
	.active_discharge_reg = ADP5055_CTRL_MODE2, \
	.ramp_reg = ADP5055_DLY##_ch, \
	.ramp_mask = ADP5055_MASK_EN_DLY, \
	.n_ramp_values = ARRAY_SIZE(adp5055_enable_delay_vals_2_6), \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	}

	#define ADP5055_REG(_name, _id, _ch) \
	ADP5055_REG_(_name, _id, _ch, &adp5055_ops)

	static struct regulator_desc adp5055_regulators[] = {
	ADP5055_REG("buck0", 0, 0),
	ADP5055_REG("buck1", 1, 1),
	ADP5055_REG("buck2", 2, 2),
	};

	static int adp5055_probe(struct i2c_client *client)
	{
	struct regulator_init_data *init_data;
	struct device *dev = &client->dev;
	struct adp5055 *adp5055;
	int i, ret;

	init_data = of_get_regulator_init_data(dev, client->dev.of_node,
	&adp5055_regulators[0]);
	if (!init_data)
	return -EINVAL;

	adp5055 = devm_kzalloc(dev, sizeof(struct adp5055), GFP_KERNEL);
	if (!adp5055)
	return -ENOMEM;

	adp5055->tset = 2600;
	adp5055->en_mode_software = false;

	adp5055->regmap = devm_regmap_init_i2c(client, &adp5055_regmap_config);
	if (IS_ERR(adp5055->regmap))
	return dev_err_probe(dev, PTR_ERR(adp5055->regmap), "Failed to allocate reg map");

	for (i = 0; i < ADP5055_NUM_CH; i++) {
	const struct regulator_desc *desc;
	struct regulator_config config = { };
	struct regulator_dev *rdev;

	if (adp5055->tset == 2600)
	adp5055_regulators[i].ramp_delay_table = adp5055_enable_delay_vals_2_6;
	else
	adp5055_regulators[i].ramp_delay_table = adp5055_enable_delay_vals_20_8;

	desc = &adp5055_regulators[i];

	config.dev = dev;
	config.driver_data = adp5055;
	config.regmap = adp5055->regmap;
	config.init_data = init_data;

	rdev = devm_regulator_register(dev, desc, &config);
	if (IS_ERR(rdev)) {
	return dev_err_probe(dev, PTR_ERR(rdev),
	"Failed to register %s\n", desc->name);
	}
	}

	ret = adp5055_parse_fw(dev, adp5055);
	if (ret < 0)
	return ret;

	return 0;
	}

	static const struct of_device_id adp5055_of_match[] = {
	{ .compatible = "adi,adp5055", },
	{ }
	};
	MODULE_DEVICE_TABLE(of, adp5055_of_match);

	static const struct i2c_device_id adp5055_ids[] = {
	{ .name = "adp5055"},
	{ },
	};
	MODULE_DEVICE_TABLE(i2c, adp5055_ids);

	static struct i2c_driver adp5055_driver = {
	.driver = {
	.name = "adp5055",
	.of_match_table = adp5055_of_match,
	},
	.probe = adp5055_probe,
	.id_table = adp5055_ids,
	};
	module_i2c_driver(adp5055_driver);

	MODULE_DESCRIPTION("ADP5055 Voltage Regulator Driver");
	MODULE_AUTHOR("Alexis Czezar Torreno <alexisczezar.torreno@analog.com>");
	MODULE_LICENSE("GPL");