[mirror_ubuntu-jammy-kernel.git] / drivers / regulator / da9121-regulator.c

// SPDX-License-Identifier: GPL-2.0-only
//
// DA9121 Single-channel dual-phase 10A buck converter
//
// Copyright (C) 2020 Axis Communications AB
//
// DA9130 Single-channel dual-phase 10A buck converter (Automotive)
// DA9217 Single-channel dual-phase  6A buck converter
// DA9122 Dual-channel single-phase  5A buck converter
// DA9131 Dual-channel single-phase  5A buck converter (Automotive)
// DA9220 Dual-channel single-phase  3A buck converter
// DA9132 Dual-channel single-phase  3A buck converter (Automotive)
//
// Copyright (C) 2020 Dialog Semiconductor

#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/regulator/da9121.h>

#include "da9121-regulator.h"

/* Chip data */
struct da9121 {
	struct device *dev;
	struct da9121_pdata *pdata;
	struct regmap *regmap;
	int variant_id;
};

/* Define ranges for different variants, enabling translation to/from
 * registers. Maximums give scope to allow for transients.
 */
struct da9121_range {
	int val_min;
	int val_max;
	int val_stp;
	int reg_min;
	int reg_max;
};

struct da9121_range da9121_10A_2phase_current = {
	.val_min =  7000000,
	.val_max = 20000000,
	.val_stp =  1000000,
	.reg_min = 1,
	.reg_max = 14,
};

struct da9121_range da9121_6A_2phase_current = {
	.val_min =  7000000,
	.val_max = 12000000,
	.val_stp =  1000000,
	.reg_min = 1,
	.reg_max = 6,
};

struct da9121_range da9121_5A_1phase_current = {
	.val_min =  3500000,
	.val_max = 10000000,
	.val_stp =   500000,
	.reg_min = 1,
	.reg_max = 14,
};

struct da9121_range da9121_3A_1phase_current = {
	.val_min = 3500000,
	.val_max = 6000000,
	.val_stp =  500000,
	.reg_min = 1,
	.reg_max = 6,
};

struct da9121_variant_info {
	int num_bucks;
	int num_phases;
	struct da9121_range *current_range;
};

static const struct da9121_variant_info variant_parameters[] = {
	{ 1, 2, &da9121_10A_2phase_current },	//DA9121_TYPE_DA9121_DA9130
	{ 2, 1, &da9121_3A_1phase_current  },	//DA9121_TYPE_DA9220_DA9132
	{ 2, 1, &da9121_5A_1phase_current  },	//DA9121_TYPE_DA9122_DA9131
	{ 1, 2, &da9121_6A_2phase_current  },	//DA9121_TYPE_DA9217
};

static const struct regulator_ops da9121_buck_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
};

static struct of_regulator_match da9121_matches[] = {
	[DA9121_IDX_BUCK1] = { .name = "buck1" },
	[DA9121_IDX_BUCK2] = { .name = "buck2" },
};

static int da9121_of_parse_cb(struct device_node *np,
				const struct regulator_desc *desc,
				struct regulator_config *config)
{
	struct da9121 *chip = config->driver_data;
	struct da9121_pdata *pdata;
	struct gpio_desc *ena_gpiod;

	if (chip->pdata == NULL) {
		pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
		if (!pdata)
			return -ENOMEM;
	} else {
		pdata = chip->pdata;
	}

	pdata->num_buck++;

	if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
		dev_err(chip->dev, "Error: excessive regulators for device\n");
		return -ENODEV;
	}

	ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
						GPIOD_OUT_HIGH |
						GPIOD_FLAGS_BIT_NONEXCLUSIVE,
						"da9121-enable");
	if (!IS_ERR(ena_gpiod))
		config->ena_gpiod = ena_gpiod;

	if (variant_parameters[chip->variant_id].num_bucks == 2) {
		uint32_t ripple_cancel;
		uint32_t ripple_reg;
		int ret;

		if (of_property_read_u32(da9121_matches[pdata->num_buck].of_node,
				"dlg,ripple-cancel", &ripple_cancel)) {
			if (pdata->num_buck > 1)
				ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
			else
				ripple_reg = DA9121_REG_BUCK_BUCK1_7;

			ret = regmap_update_bits(chip->regmap, ripple_reg,
				DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
				ripple_cancel);
			if (ret < 0)
				dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
		}
	}

	return 0;
}

#define DA9121_MIN_MV		300
#define DA9121_MAX_MV		1900
#define DA9121_STEP_MV		10
#define DA9121_MIN_SEL		(DA9121_MIN_MV / DA9121_STEP_MV)
#define DA9121_N_VOLTAGES	(((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
				 + 1 + DA9121_MIN_SEL)

static const struct regulator_desc da9121_reg = {
	.id = DA9121_IDX_BUCK1,
	.name = "da9121",
	.of_match = "buck1",
	.of_parse_cb = da9121_of_parse_cb,
	.owner = THIS_MODULE,
	.regulators_node = of_match_ptr("regulators"),
	.ops = &da9121_buck_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = DA9121_N_VOLTAGES,
	.min_uV = DA9121_MIN_MV * 1000,
	.uV_step = DA9121_STEP_MV * 1000,
	.linear_min_sel = DA9121_MIN_SEL,
	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	/* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
	.ramp_delay = 20000,
	/* tBUCK_EN */
	.enable_time = 20,
};

static const struct regulator_desc da9220_reg[2] = {
	{
		.id = DA9121_IDX_BUCK1,
		.name = "DA9220/DA9132 BUCK1",
		.of_match = "buck1",
		.of_parse_cb = da9121_of_parse_cb,
		.owner = THIS_MODULE,
		.regulators_node = of_match_ptr("regulators"),
		.ops = &da9121_buck_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = DA9121_N_VOLTAGES,
		.min_uV = DA9121_MIN_MV * 1000,
		.uV_step = DA9121_STEP_MV * 1000,
		.linear_min_sel = DA9121_MIN_SEL,
		.enable_reg = DA9121_REG_BUCK_BUCK1_0,
		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
		.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	},
	{
		.id = DA9121_IDX_BUCK2,
		.name = "DA9220/DA9132 BUCK2",
		.of_match = "buck2",
		.of_parse_cb = da9121_of_parse_cb,
		.owner = THIS_MODULE,
		.regulators_node = of_match_ptr("regulators"),
		.ops = &da9121_buck_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = DA9121_N_VOLTAGES,
		.min_uV = DA9121_MIN_MV * 1000,
		.uV_step = DA9121_STEP_MV * 1000,
		.linear_min_sel = DA9121_MIN_SEL,
		.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
		.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	}
};

static const struct regulator_desc da9122_reg[2] = {
	{
		.id = DA9121_IDX_BUCK1,
		.name = "DA9122/DA9131 BUCK1",
		.of_match = "buck1",
		.of_parse_cb = da9121_of_parse_cb,
		.owner = THIS_MODULE,
		.regulators_node = of_match_ptr("regulators"),
		.ops = &da9121_buck_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = DA9121_N_VOLTAGES,
		.min_uV = DA9121_MIN_MV * 1000,
		.uV_step = DA9121_STEP_MV * 1000,
		.linear_min_sel = DA9121_MIN_SEL,
		.enable_reg = DA9121_REG_BUCK_BUCK1_0,
		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
		.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	},
	{
		.id = DA9121_IDX_BUCK2,
		.name = "DA9122/DA9131 BUCK2",
		.of_match = "buck2",
		.of_parse_cb = da9121_of_parse_cb,
		.owner = THIS_MODULE,
		.regulators_node = of_match_ptr("regulators"),
		.ops = &da9121_buck_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = DA9121_N_VOLTAGES,
		.min_uV = DA9121_MIN_MV * 1000,
		.uV_step = DA9121_STEP_MV * 1000,
		.linear_min_sel = DA9121_MIN_SEL,
		.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
		.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	}
};

static const struct regulator_desc da9217_reg = {
	.id = DA9121_IDX_BUCK1,
	.name = "DA9217 BUCK1",
	.of_match = "buck1",
	.of_parse_cb = da9121_of_parse_cb,
	.owner = THIS_MODULE,
	.regulators_node = of_match_ptr("regulators"),
	.ops = &da9121_buck_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = DA9121_N_VOLTAGES,
	.min_uV = DA9121_MIN_MV * 1000,
	.uV_step = DA9121_STEP_MV * 1000,
	.linear_min_sel = DA9121_MIN_SEL,
	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
};

static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
	[DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
	[DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
	[DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
	[DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
};

/* DA9121 chip register model */
static const struct regmap_range da9121_1ch_readable_ranges[] = {
	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
};

static const struct regmap_access_table da9121_1ch_readable_table = {
	.yes_ranges = da9121_1ch_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
};

static const struct regmap_range da9121_2ch_readable_ranges[] = {
	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
};

static const struct regmap_access_table da9121_2ch_readable_table = {
	.yes_ranges = da9121_2ch_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
};

static const struct regmap_range da9121_1ch_writeable_ranges[] = {
	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
};

static const struct regmap_access_table da9121_1ch_writeable_table = {
	.yes_ranges = da9121_1ch_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
};

static const struct regmap_range da9121_2ch_writeable_ranges[] = {
	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
};

static const struct regmap_access_table da9121_2ch_writeable_table = {
	.yes_ranges = da9121_2ch_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
};


static const struct regmap_range da9121_volatile_ranges[] = {
	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
};

static const struct regmap_access_table da9121_volatile_table = {
	.yes_ranges = da9121_volatile_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
};

/* DA9121 regmap config for 1 channel variants */
static struct regmap_config da9121_1ch_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = DA9121_REG_OTP_CONFIG_ID,
	.rd_table = &da9121_1ch_readable_table,
	.wr_table = &da9121_1ch_writeable_table,
	.volatile_table = &da9121_volatile_table,
	.cache_type = REGCACHE_RBTREE,
};

/* DA9121 regmap config for 2 channel variants */
static struct regmap_config da9121_2ch_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = DA9121_REG_OTP_CONFIG_ID,
	.rd_table = &da9121_2ch_readable_table,
	.wr_table = &da9121_2ch_writeable_table,
	.volatile_table = &da9121_volatile_table,
	.cache_type = REGCACHE_RBTREE,
};

static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
{
	u32 device_id;
	u8 chip_id = chip->variant_id;
	u32 variant_id;
	u8 variant_mrc, variant_vrc;
	char *type;
	const char *name;
	bool config_match = false;
	int ret = 0;

	ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
	if (ret < 0) {
		dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
		goto error;
	}

	ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
	if (ret < 0) {
		dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
		goto error;
	}

	if (device_id != DA9121_DEVICE_ID) {
		dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
		ret = -ENODEV;
		goto error;
	}

	variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;

	switch (variant_vrc) {
	case DA9121_VARIANT_VRC:
		type = "DA9121/DA9130";
		config_match = (chip_id == DA9121_TYPE_DA9121_DA9130);
		break;
	case DA9220_VARIANT_VRC:
		type = "DA9220/DA9132";
		config_match = (chip_id == DA9121_TYPE_DA9220_DA9132);
		break;
	case DA9122_VARIANT_VRC:
		type = "DA9122/DA9131";
		config_match = (chip_id == DA9121_TYPE_DA9122_DA9131);
		break;
	case DA9217_VARIANT_VRC:
		type = "DA9217";
		config_match = (chip_id == DA9121_TYPE_DA9217);
		break;
	default:
		type = "Unknown";
		break;
	}

	dev_info(chip->dev,
		 "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
		 device_id, variant_id, type);

	if (!config_match) {
		dev_err(chip->dev, "Device tree configuration '%s' does not match detected device.\n", name);
		ret = -EINVAL;
		goto error;
	}

	variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
			>> DA9121_SHIFT_OTP_VARIANT_ID_MRC;

	if ((device_id == DA9121_DEVICE_ID) &&
	    (variant_mrc < DA9121_VARIANT_MRC_BASE)) {
		dev_err(chip->dev,
			"Cannot support variant MRC: 0x%02X\n", variant_mrc);
		ret = -EINVAL;
	}
error:
	return ret;
}

static int da9121_assign_chip_model(struct i2c_client *i2c,
			struct da9121 *chip)
{
	struct regmap_config *regmap;
	int ret = 0;

	chip->dev = &i2c->dev;

	switch (chip->variant_id) {
	case DA9121_TYPE_DA9121_DA9130:
		fallthrough;
	case DA9121_TYPE_DA9217:
		regmap = &da9121_1ch_regmap_config;
		break;
	case DA9121_TYPE_DA9122_DA9131:
		fallthrough;
	case DA9121_TYPE_DA9220_DA9132:
		regmap = &da9121_2ch_regmap_config;
		break;
	}

	/* Set these up for of_regulator_match call which may want .of_map_modes */
	da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
	da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];

	chip->regmap = devm_regmap_init_i2c(i2c, regmap);
	if (IS_ERR(chip->regmap)) {
		ret = PTR_ERR(chip->regmap);
		dev_err(chip->dev, "Failed to configure a register map: %d\n",
			ret);
	}

	ret = da9121_check_device_type(i2c, chip);

	return ret;
}

static const struct of_device_id da9121_dt_ids[] = {
	{ .compatible = "dlg,da9121", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
	{ .compatible = "dlg,da9130", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
	{ .compatible = "dlg,da9217", .data = (void *) DA9121_TYPE_DA9217 },
	{ .compatible = "dlg,da9122", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
	{ .compatible = "dlg,da9131", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
	{ .compatible = "dlg,da9220", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
	{ .compatible = "dlg,da9132", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
	{ }
};
MODULE_DEVICE_TABLE(of, da9121_dt_ids);

static inline int da9121_of_get_id(struct device *dev)
{
	const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);

	if (!id) {
		dev_err(dev, "%s: Failed\n", __func__);
		return -EINVAL;
	}
	return (uintptr_t)id->data;
}

static int da9121_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct da9121 *chip;
	int ret = 0;
	struct device *dev = &i2c->dev;
	struct regulator_config config = {};
	struct regulator_dev *rdev;

	chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
	if (!chip) {
		ret = -ENOMEM;
		goto error;
	}

	chip->pdata = i2c->dev.platform_data;
	chip->variant_id = da9121_of_get_id(&i2c->dev);

	ret = da9121_assign_chip_model(i2c, chip);
	if (ret < 0)
		goto error;

	config.dev = &i2c->dev;
	config.driver_data = chip;
	config.of_node = dev->of_node;
	config.regmap = chip->regmap;

	rdev = devm_regulator_register(&i2c->dev, &da9121_reg, &config);
	if (IS_ERR(rdev)) {
		dev_err(&i2c->dev, "Failed to register da9121 regulator\n");
		return PTR_ERR(rdev);
	}

error:
	return ret;
}

static const struct i2c_device_id da9121_i2c_id[] = {
	{"da9121", DA9121_TYPE_DA9121_DA9130},
	{"da9130", DA9121_TYPE_DA9121_DA9130},
	{"da9217", DA9121_TYPE_DA9217},
	{"da9122", DA9121_TYPE_DA9122_DA9131},
	{"da9131", DA9121_TYPE_DA9122_DA9131},
	{"da9220", DA9121_TYPE_DA9220_DA9132},
	{"da9132", DA9121_TYPE_DA9220_DA9132},
	{},
};
MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);

static struct i2c_driver da9121_regulator_driver = {
	.driver = {
		.name = "da9121",
		.of_match_table = of_match_ptr(da9121_dt_ids),
	},
	.probe = da9121_i2c_probe,
	.id_table = da9121_i2c_id,
};

module_i2c_driver(da9121_regulator_driver);

MODULE_LICENSE("GPL v2");
Commit	Line	Data
e6ff10f2	1	// SPDX-License-Identifier: GPL-2.0-only
c860476b AW	2	//
	3	// DA9121 Single-channel dual-phase 10A buck converter
	4	//
	5	// Copyright (C) 2020 Axis Communications AB
	6	//
	7	// DA9130 Single-channel dual-phase 10A buck converter (Automotive)
	8	// DA9217 Single-channel dual-phase 6A buck converter
	9	// DA9122 Dual-channel single-phase 5A buck converter
	10	// DA9131 Dual-channel single-phase 5A buck converter (Automotive)
	11	// DA9220 Dual-channel single-phase 3A buck converter
	12	// DA9132 Dual-channel single-phase 3A buck converter (Automotive)
	13	//
	14	// Copyright (C) 2020 Dialog Semiconductor
e6ff10f2 VW	15
e6ff10f2 VW	16	#include <linux/of_device.h>
46c413d5	17	#include <linux/of_gpio.h>
e6ff10f2 VW	18	#include <linux/regulator/of_regulator.h>
	19	#include <linux/regulator/machine.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/module.h>
	22	#include <linux/regmap.h>
	23	#include <linux/err.h>
	24	#include <linux/i2c.h>
c860476b AW	25	#include <linux/regulator/da9121.h>
c860476b AW	26
86f162c9	27	#include "da9121-regulator.h"
e6ff10f2	28
f3fbd556 AW	29	/* Chip data */
	30	struct da9121 {
	31	struct device *dev;
46c413d5	32	struct da9121_pdata *pdata;
c860476b	33	struct regmap *regmap;
f3fbd556 AW	34	int variant_id;
	35	};
	36
46c413d5 AW	37	/* Define ranges for different variants, enabling translation to/from
	38	* registers. Maximums give scope to allow for transients.
	39	*/
	40	struct da9121_range {
	41	int val_min;
	42	int val_max;
	43	int val_stp;
	44	int reg_min;
	45	int reg_max;
	46	};
	47
	48	struct da9121_range da9121_10A_2phase_current = {
	49	.val_min = 7000000,
	50	.val_max = 20000000,
	51	.val_stp = 1000000,
	52	.reg_min = 1,
	53	.reg_max = 14,
	54	};
	55
	56	struct da9121_range da9121_6A_2phase_current = {
	57	.val_min = 7000000,
	58	.val_max = 12000000,
	59	.val_stp = 1000000,
	60	.reg_min = 1,
	61	.reg_max = 6,
	62	};
	63
	64	struct da9121_range da9121_5A_1phase_current = {
	65	.val_min = 3500000,
	66	.val_max = 10000000,
	67	.val_stp = 500000,
	68	.reg_min = 1,
	69	.reg_max = 14,
	70	};
	71
	72	struct da9121_range da9121_3A_1phase_current = {
	73	.val_min = 3500000,
	74	.val_max = 6000000,
	75	.val_stp = 500000,
	76	.reg_min = 1,
	77	.reg_max = 6,
	78	};
	79
	80	struct da9121_variant_info {
	81	int num_bucks;
	82	int num_phases;
	83	struct da9121_range *current_range;
	84	};
	85
	86	static const struct da9121_variant_info variant_parameters[] = {
	87	{ 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130
	88	{ 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132
	89	{ 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131
	90	{ 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217
	91	};
	92
e6ff10f2 VW	93	static const struct regulator_ops da9121_buck_ops = {
	94	.enable = regulator_enable_regmap,
	95	.disable = regulator_disable_regmap,
	96	.is_enabled = regulator_is_enabled_regmap,
	97	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	98	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	99	.list_voltage = regulator_list_voltage_linear,
	100	};
	101
91863239 AW	102	static struct of_regulator_match da9121_matches[] = {
	103	[DA9121_IDX_BUCK1] = { .name = "buck1" },
	104	[DA9121_IDX_BUCK2] = { .name = "buck2" },
	105	};
	106
46c413d5 AW	107	static int da9121_of_parse_cb(struct device_node *np,
	108	const struct regulator_desc *desc,
	109	struct regulator_config *config)
	110	{
	111	struct da9121 *chip = config->driver_data;
	112	struct da9121_pdata *pdata;
	113	struct gpio_desc *ena_gpiod;
	114
	115	if (chip->pdata == NULL) {
	116	pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
	117	if (!pdata)
	118	return -ENOMEM;
	119	} else {
	120	pdata = chip->pdata;
	121	}
	122
	123	pdata->num_buck++;
	124
	125	if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
	126	dev_err(chip->dev, "Error: excessive regulators for device\n");
	127	return -ENODEV;
	128	}
	129
	130	ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
	131	GPIOD_OUT_HIGH \|
	132	GPIOD_FLAGS_BIT_NONEXCLUSIVE,
	133	"da9121-enable");
	134	if (!IS_ERR(ena_gpiod))
	135	config->ena_gpiod = ena_gpiod;
	136
	137	if (variant_parameters[chip->variant_id].num_bucks == 2) {
	138	uint32_t ripple_cancel;
	139	uint32_t ripple_reg;
	140	int ret;
	141
	142	if (of_property_read_u32(da9121_matches[pdata->num_buck].of_node,
	143	"dlg,ripple-cancel", &ripple_cancel)) {
	144	if (pdata->num_buck > 1)
	145	ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
	146	else
	147	ripple_reg = DA9121_REG_BUCK_BUCK1_7;
	148
	149	ret = regmap_update_bits(chip->regmap, ripple_reg,
	150	DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
	151	ripple_cancel);
	152	if (ret < 0)
	153	dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
	154	}
	155	}
	156
	157	return 0;
	158	}
	159
c860476b AW	160	#define DA9121_MIN_MV 300
	161	#define DA9121_MAX_MV 1900
	162	#define DA9121_STEP_MV 10
	163	#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
	164	#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
	165	+ 1 + DA9121_MIN_SEL)
	166
e6ff10f2	167	static const struct regulator_desc da9121_reg = {
91863239	168	.id = DA9121_IDX_BUCK1,
e6ff10f2 VW	169	.name = "da9121",
e6ff10f2 VW	170	.of_match = "buck1",
46c413d5	171	.of_parse_cb = da9121_of_parse_cb,
e6ff10f2	172	.owner = THIS_MODULE,
91863239	173	.regulators_node = of_match_ptr("regulators"),
e6ff10f2 VW	174	.ops = &da9121_buck_ops,
	175	.type = REGULATOR_VOLTAGE,
	176	.n_voltages = DA9121_N_VOLTAGES,
	177	.min_uV = DA9121_MIN_MV * 1000,
	178	.uV_step = DA9121_STEP_MV * 1000,
	179	.linear_min_sel = DA9121_MIN_SEL,
86f162c9 AW	180	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	181	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	182	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	183	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
e6ff10f2 VW	184	/* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
	185	.ramp_delay = 20000,
	186	/* tBUCK_EN */
	187	.enable_time = 20,
	188	};
	189
91863239 AW	190	static const struct regulator_desc da9220_reg[2] = {
	191	{
	192	.id = DA9121_IDX_BUCK1,
	193	.name = "DA9220/DA9132 BUCK1",
	194	.of_match = "buck1",
46c413d5	195	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	196	.owner = THIS_MODULE,
	197	.regulators_node = of_match_ptr("regulators"),
	198	.ops = &da9121_buck_ops,
	199	.type = REGULATOR_VOLTAGE,
	200	.n_voltages = DA9121_N_VOLTAGES,
	201	.min_uV = DA9121_MIN_MV * 1000,
	202	.uV_step = DA9121_STEP_MV * 1000,
	203	.linear_min_sel = DA9121_MIN_SEL,
	204	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	205	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	206	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	207	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	208	},
	209	{
	210	.id = DA9121_IDX_BUCK2,
	211	.name = "DA9220/DA9132 BUCK2",
	212	.of_match = "buck2",
46c413d5	213	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	214	.owner = THIS_MODULE,
	215	.regulators_node = of_match_ptr("regulators"),
	216	.ops = &da9121_buck_ops,
	217	.type = REGULATOR_VOLTAGE,
	218	.n_voltages = DA9121_N_VOLTAGES,
	219	.min_uV = DA9121_MIN_MV * 1000,
	220	.uV_step = DA9121_STEP_MV * 1000,
	221	.linear_min_sel = DA9121_MIN_SEL,
	222	.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
	223	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	224	.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
	225	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	226	}
	227	};
	228
	229	static const struct regulator_desc da9122_reg[2] = {
	230	{
	231	.id = DA9121_IDX_BUCK1,
	232	.name = "DA9122/DA9131 BUCK1",
	233	.of_match = "buck1",
46c413d5	234	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	235	.owner = THIS_MODULE,
	236	.regulators_node = of_match_ptr("regulators"),
	237	.ops = &da9121_buck_ops,
	238	.type = REGULATOR_VOLTAGE,
	239	.n_voltages = DA9121_N_VOLTAGES,
	240	.min_uV = DA9121_MIN_MV * 1000,
	241	.uV_step = DA9121_STEP_MV * 1000,
	242	.linear_min_sel = DA9121_MIN_SEL,
	243	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	244	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	245	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	246	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	247	},
	248	{
	249	.id = DA9121_IDX_BUCK2,
	250	.name = "DA9122/DA9131 BUCK2",
	251	.of_match = "buck2",
46c413d5	252	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	253	.owner = THIS_MODULE,
	254	.regulators_node = of_match_ptr("regulators"),
	255	.ops = &da9121_buck_ops,
	256	.type = REGULATOR_VOLTAGE,
	257	.n_voltages = DA9121_N_VOLTAGES,
	258	.min_uV = DA9121_MIN_MV * 1000,
	259	.uV_step = DA9121_STEP_MV * 1000,
	260	.linear_min_sel = DA9121_MIN_SEL,
	261	.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
	262	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	263	.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
	264	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	265	}
	266	};
	267
	268	static const struct regulator_desc da9217_reg = {
	269	.id = DA9121_IDX_BUCK1,
	270	.name = "DA9217 BUCK1",
	271	.of_match = "buck1",
46c413d5	272	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	273	.owner = THIS_MODULE,
	274	.regulators_node = of_match_ptr("regulators"),
	275	.ops = &da9121_buck_ops,
	276	.type = REGULATOR_VOLTAGE,
	277	.n_voltages = DA9121_N_VOLTAGES,
	278	.min_uV = DA9121_MIN_MV * 1000,
	279	.uV_step = DA9121_STEP_MV * 1000,
	280	.linear_min_sel = DA9121_MIN_SEL,
	281	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	282	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	283	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	284	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	285	};
	286
	287	static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
	288	[DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
	289	[DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
	290	[DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
	291	[DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
	292	};
	293
c860476b AW	294	/* DA9121 chip register model */
	295	static const struct regmap_range da9121_1ch_readable_ranges[] = {
	296	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
	297	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	298	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	299	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
	300	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
	301	};
	302
	303	static const struct regmap_access_table da9121_1ch_readable_table = {
	304	.yes_ranges = da9121_1ch_readable_ranges,
	305	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
	306	};
	307
	308	static const struct regmap_range da9121_2ch_readable_ranges[] = {
	309	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
	310	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	311	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	312	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
	313	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
	314	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
	315	};
	316
	317	static const struct regmap_access_table da9121_2ch_readable_table = {
	318	.yes_ranges = da9121_2ch_readable_ranges,
	319	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
	320	};
	321
	322	static const struct regmap_range da9121_1ch_writeable_ranges[] = {
	323	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
	324	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	325	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	326	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
	327	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
	328	};
	329
	330	static const struct regmap_access_table da9121_1ch_writeable_table = {
	331	.yes_ranges = da9121_1ch_writeable_ranges,
	332	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
	333	};
	334
	335	static const struct regmap_range da9121_2ch_writeable_ranges[] = {
	336	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
	337	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	338	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	339	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
	340	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
	341	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
	342	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
	343	};
	344
	345	static const struct regmap_access_table da9121_2ch_writeable_table = {
	346	.yes_ranges = da9121_2ch_writeable_ranges,
	347	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
	348	};
	349
	350
	351	static const struct regmap_range da9121_volatile_ranges[] = {
	352	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
	353	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	354	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
	355	};
	356
	357	static const struct regmap_access_table da9121_volatile_table = {
358	.yes_ranges = da9121_volatile_ranges,
359	.n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
360	};
361
362	/* DA9121 regmap config for 1 channel variants */
363	static struct regmap_config da9121_1ch_regmap_config = {
364	.reg_bits = 8,
365	.val_bits = 8,
366	.max_register = DA9121_REG_OTP_CONFIG_ID,
367	.rd_table = &da9121_1ch_readable_table,
368	.wr_table = &da9121_1ch_writeable_table,
369	.volatile_table = &da9121_volatile_table,
370	.cache_type = REGCACHE_RBTREE,
371	};
372
373	/* DA9121 regmap config for 2 channel variants */
374	static struct regmap_config da9121_2ch_regmap_config = {
375	.reg_bits = 8,
376	.val_bits = 8,
377	.max_register = DA9121_REG_OTP_CONFIG_ID,
378	.rd_table = &da9121_2ch_readable_table,
379	.wr_table = &da9121_2ch_writeable_table,
380	.volatile_table = &da9121_volatile_table,
381	.cache_type = REGCACHE_RBTREE,
382	};
383
384	static int da9121_check_device_type(struct i2c_client i2c, struct da9121 chip)
385	{
386	u32 device_id;
387	u8 chip_id = chip->variant_id;
388	u32 variant_id;
389	u8 variant_mrc, variant_vrc;
390	char *type;
391	const char *name;
392	bool config_match = false;
393	int ret = 0;
394
395	ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
396	if (ret < 0) {
397	dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
398	goto error;
399	}
400
401	ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
402	if (ret < 0) {
403	dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
404	goto error;
405	}
406
407	if (device_id != DA9121_DEVICE_ID) {
408	dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
409	ret = -ENODEV;
410	goto error;
411	}
412
413	variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
414
415	switch (variant_vrc) {
416	case DA9121_VARIANT_VRC:
417	type = "DA9121/DA9130";
418	config_match = (chip_id == DA9121_TYPE_DA9121_DA9130);
419	break;
420	case DA9220_VARIANT_VRC:
421	type = "DA9220/DA9132";
422	config_match = (chip_id == DA9121_TYPE_DA9220_DA9132);
423	break;
424	case DA9122_VARIANT_VRC:
425	type = "DA9122/DA9131";
426	config_match = (chip_id == DA9121_TYPE_DA9122_DA9131);
427	break;
428	case DA9217_VARIANT_VRC:
429	type = "DA9217";
430	config_match = (chip_id == DA9121_TYPE_DA9217);
431	break;
432	default:
433	type = "Unknown";
434	break;
435	}
436
437	dev_info(chip->dev,
438	"Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
439	device_id, variant_id, type);
440
441	if (!config_match) {
442	dev_err(chip->dev, "Device tree configuration '%s' does not match detected device.\n", name);
443	ret = -EINVAL;
444	goto error;
445	}
446
447	variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
448	>> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
449
450	if ((device_id == DA9121_DEVICE_ID) &&
451	(variant_mrc < DA9121_VARIANT_MRC_BASE)) {
452	dev_err(chip->dev,
453	"Cannot support variant MRC: 0x%02X\n", variant_mrc);
454	ret = -EINVAL;
455	}
456	error:
457	return ret;
458	}
459
460	static int da9121_assign_chip_model(struct i2c_client *i2c,
461	struct da9121 *chip)
462	{
463	struct regmap_config *regmap;
464	int ret = 0;
465
466	chip->dev = &i2c->dev;
467
468	switch (chip->variant_id) {
469	case DA9121_TYPE_DA9121_DA9130:
470	fallthrough;
471	case DA9121_TYPE_DA9217:
472	regmap = &da9121_1ch_regmap_config;
473	break;
474	case DA9121_TYPE_DA9122_DA9131:
475	fallthrough;
476	case DA9121_TYPE_DA9220_DA9132:
477	regmap = &da9121_2ch_regmap_config;
478	break;
479	}
480
91863239 AW	481	/* Set these up for of_regulator_match call which may want .of_map_modes */
	482	da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
	483	da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
	484
c860476b AW	485	chip->regmap = devm_regmap_init_i2c(i2c, regmap);
	486	if (IS_ERR(chip->regmap)) {
	487	ret = PTR_ERR(chip->regmap);
	488	dev_err(chip->dev, "Failed to configure a register map: %d\n",
	489	ret);
	490	}
	491
	492	ret = da9121_check_device_type(i2c, chip);
	493
	494	return ret;
	495	}
	496
e6ff10f2	497	static const struct of_device_id da9121_dt_ids[] = {
f3fbd556 AW	498	{ .compatible = "dlg,da9121", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
	499	{ .compatible = "dlg,da9130", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
	500	{ .compatible = "dlg,da9217", .data = (void *) DA9121_TYPE_DA9217 },
	501	{ .compatible = "dlg,da9122", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
	502	{ .compatible = "dlg,da9131", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
	503	{ .compatible = "dlg,da9220", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
	504	{ .compatible = "dlg,da9132", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
e6ff10f2 VW	505	{ }
	506	};
	507	MODULE_DEVICE_TABLE(of, da9121_dt_ids);
	508
f3fbd556 AW	509	static inline int da9121_of_get_id(struct device *dev)
	510	{
	511	const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
	512
	513	if (!id) {
	514	dev_err(dev, "%s: Failed\n", __func__);
	515	return -EINVAL;
	516	}
	517	return (uintptr_t)id->data;
	518	}
	519
e6ff10f2 VW	520	static int da9121_i2c_probe(struct i2c_client *i2c,
	521	const struct i2c_device_id *id)
	522	{
f3fbd556 AW	523	struct da9121 *chip;
f3fbd556 AW	524	int ret = 0;
e6ff10f2 VW	525	struct device *dev = &i2c->dev;
	526	struct regulator_config config = {};
	527	struct regulator_dev *rdev;
e6ff10f2	528
f3fbd556 AW	529	chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
	530	if (!chip) {
	531	ret = -ENOMEM;
	532	goto error;
	533	}
	534
46c413d5	535	chip->pdata = i2c->dev.platform_data;
f3fbd556 AW	536	chip->variant_id = da9121_of_get_id(&i2c->dev);
f3fbd556 AW	537
c860476b AW	538	ret = da9121_assign_chip_model(i2c, chip);
	539	if (ret < 0)
	540	goto error;
e6ff10f2 VW	541
e6ff10f2 VW	542	config.dev = &i2c->dev;
46c413d5	543	config.driver_data = chip;
e6ff10f2	544	config.of_node = dev->of_node;
c860476b	545	config.regmap = chip->regmap;
e6ff10f2 VW	546
	547	rdev = devm_regulator_register(&i2c->dev, &da9121_reg, &config);
	548	if (IS_ERR(rdev)) {
	549	dev_err(&i2c->dev, "Failed to register da9121 regulator\n");
	550	return PTR_ERR(rdev);
	551	}
	552
f3fbd556 AW	553	error:
f3fbd556 AW	554	return ret;
e6ff10f2 VW	555	}
	556
	557	static const struct i2c_device_id da9121_i2c_id[] = {
f3fbd556 AW	558	{"da9121", DA9121_TYPE_DA9121_DA9130},
	559	{"da9130", DA9121_TYPE_DA9121_DA9130},
	560	{"da9217", DA9121_TYPE_DA9217},
	561	{"da9122", DA9121_TYPE_DA9122_DA9131},
	562	{"da9131", DA9121_TYPE_DA9122_DA9131},
	563	{"da9220", DA9121_TYPE_DA9220_DA9132},
	564	{"da9132", DA9121_TYPE_DA9220_DA9132},
e6ff10f2 VW	565	{},
	566	};
	567	MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
	568
	569	static struct i2c_driver da9121_regulator_driver = {
	570	.driver = {
	571	.name = "da9121",
	572	.of_match_table = of_match_ptr(da9121_dt_ids),
	573	},
	574	.probe = da9121_i2c_probe,
	575	.id_table = da9121_i2c_id,
	576	};
	577
	578	module_i2c_driver(da9121_regulator_driver);
	579
	580	MODULE_LICENSE("GPL v2");