[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;
	struct regulator_dev *rdev[DA9121_IDX_MAX];
	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 },
};

static int da9121_set_regulator_config(struct da9121 *chip)
{
	struct regulator_config config = { };
	unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
	int ret = 0;
	int i;

	for (i = 0; i < max_matches; i++) {
		const struct regulator_desc *regl_desc =
			local_da9121_regulators[chip->variant_id][i];

		config.dev = chip->dev;
		config.driver_data = chip;
		config.regmap = chip->regmap;

		chip->rdev[i] = devm_regulator_register(chip->dev,
					regl_desc, &config);
		if (IS_ERR(chip->rdev[i])) {
			dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
				regl_desc->name, (i+1), max_matches);
			ret = PTR_ERR(chip->rdev[i]);
			goto error;
		}
	}

error:
	return ret;
}

/* 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;

	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;

	ret = da9121_set_regulator_config(chip);

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;
9929900d	34	struct regulator_dev *rdev[DA9121_IDX_MAX];
f3fbd556 AW	35	int variant_id;
	36	};
	37
46c413d5 AW	38	/* Define ranges for different variants, enabling translation to/from
	39	* registers. Maximums give scope to allow for transients.
	40	*/
	41	struct da9121_range {
	42	int val_min;
	43	int val_max;
	44	int val_stp;
	45	int reg_min;
	46	int reg_max;
	47	};
	48
	49	struct da9121_range da9121_10A_2phase_current = {
	50	.val_min = 7000000,
	51	.val_max = 20000000,
	52	.val_stp = 1000000,
	53	.reg_min = 1,
	54	.reg_max = 14,
	55	};
	56
	57	struct da9121_range da9121_6A_2phase_current = {
	58	.val_min = 7000000,
	59	.val_max = 12000000,
	60	.val_stp = 1000000,
	61	.reg_min = 1,
	62	.reg_max = 6,
	63	};
	64
	65	struct da9121_range da9121_5A_1phase_current = {
	66	.val_min = 3500000,
	67	.val_max = 10000000,
	68	.val_stp = 500000,
	69	.reg_min = 1,
	70	.reg_max = 14,
	71	};
	72
	73	struct da9121_range da9121_3A_1phase_current = {
	74	.val_min = 3500000,
	75	.val_max = 6000000,
	76	.val_stp = 500000,
	77	.reg_min = 1,
	78	.reg_max = 6,
	79	};
	80
	81	struct da9121_variant_info {
	82	int num_bucks;
	83	int num_phases;
	84	struct da9121_range *current_range;
	85	};
	86
	87	static const struct da9121_variant_info variant_parameters[] = {
	88	{ 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130
	89	{ 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132
	90	{ 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131
	91	{ 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217
	92	};
	93
e6ff10f2 VW	94	static const struct regulator_ops da9121_buck_ops = {
	95	.enable = regulator_enable_regmap,
	96	.disable = regulator_disable_regmap,
	97	.is_enabled = regulator_is_enabled_regmap,
	98	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	99	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	100	.list_voltage = regulator_list_voltage_linear,
	101	};
	102
91863239 AW	103	static struct of_regulator_match da9121_matches[] = {
	104	[DA9121_IDX_BUCK1] = { .name = "buck1" },
	105	[DA9121_IDX_BUCK2] = { .name = "buck2" },
	106	};
	107
46c413d5 AW	108	static int da9121_of_parse_cb(struct device_node *np,
	109	const struct regulator_desc *desc,
	110	struct regulator_config *config)
	111	{
	112	struct da9121 *chip = config->driver_data;
	113	struct da9121_pdata *pdata;
	114	struct gpio_desc *ena_gpiod;
	115
	116	if (chip->pdata == NULL) {
	117	pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
	118	if (!pdata)
	119	return -ENOMEM;
	120	} else {
	121	pdata = chip->pdata;
	122	}
	123
	124	pdata->num_buck++;
	125
	126	if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
	127	dev_err(chip->dev, "Error: excessive regulators for device\n");
	128	return -ENODEV;
	129	}
	130
	131	ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
	132	GPIOD_OUT_HIGH \|
	133	GPIOD_FLAGS_BIT_NONEXCLUSIVE,
	134	"da9121-enable");
	135	if (!IS_ERR(ena_gpiod))
	136	config->ena_gpiod = ena_gpiod;
	137
	138	if (variant_parameters[chip->variant_id].num_bucks == 2) {
	139	uint32_t ripple_cancel;
	140	uint32_t ripple_reg;
	141	int ret;
	142
	143	if (of_property_read_u32(da9121_matches[pdata->num_buck].of_node,
	144	"dlg,ripple-cancel", &ripple_cancel)) {
	145	if (pdata->num_buck > 1)
	146	ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
	147	else
	148	ripple_reg = DA9121_REG_BUCK_BUCK1_7;
	149
	150	ret = regmap_update_bits(chip->regmap, ripple_reg,
	151	DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
	152	ripple_cancel);
	153	if (ret < 0)
	154	dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
	155	}
	156	}
	157
	158	return 0;
	159	}
	160
c860476b AW	161	#define DA9121_MIN_MV 300
	162	#define DA9121_MAX_MV 1900
	163	#define DA9121_STEP_MV 10
	164	#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
	165	#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
	166	+ 1 + DA9121_MIN_SEL)
	167
e6ff10f2	168	static const struct regulator_desc da9121_reg = {
91863239	169	.id = DA9121_IDX_BUCK1,
e6ff10f2 VW	170	.name = "da9121",
e6ff10f2 VW	171	.of_match = "buck1",
46c413d5	172	.of_parse_cb = da9121_of_parse_cb,
e6ff10f2	173	.owner = THIS_MODULE,
91863239	174	.regulators_node = of_match_ptr("regulators"),
e6ff10f2 VW	175	.ops = &da9121_buck_ops,
	176	.type = REGULATOR_VOLTAGE,
	177	.n_voltages = DA9121_N_VOLTAGES,
	178	.min_uV = DA9121_MIN_MV * 1000,
	179	.uV_step = DA9121_STEP_MV * 1000,
	180	.linear_min_sel = DA9121_MIN_SEL,
86f162c9 AW	181	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	182	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	183	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	184	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
e6ff10f2 VW	185	/* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
	186	.ramp_delay = 20000,
	187	/* tBUCK_EN */
	188	.enable_time = 20,
	189	};
	190
91863239 AW	191	static const struct regulator_desc da9220_reg[2] = {
	192	{
	193	.id = DA9121_IDX_BUCK1,
	194	.name = "DA9220/DA9132 BUCK1",
	195	.of_match = "buck1",
46c413d5	196	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	197	.owner = THIS_MODULE,
	198	.regulators_node = of_match_ptr("regulators"),
	199	.ops = &da9121_buck_ops,
	200	.type = REGULATOR_VOLTAGE,
	201	.n_voltages = DA9121_N_VOLTAGES,
	202	.min_uV = DA9121_MIN_MV * 1000,
	203	.uV_step = DA9121_STEP_MV * 1000,
	204	.linear_min_sel = DA9121_MIN_SEL,
	205	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	206	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	207	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	208	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	209	},
	210	{
	211	.id = DA9121_IDX_BUCK2,
	212	.name = "DA9220/DA9132 BUCK2",
	213	.of_match = "buck2",
46c413d5	214	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	215	.owner = THIS_MODULE,
	216	.regulators_node = of_match_ptr("regulators"),
	217	.ops = &da9121_buck_ops,
	218	.type = REGULATOR_VOLTAGE,
	219	.n_voltages = DA9121_N_VOLTAGES,
	220	.min_uV = DA9121_MIN_MV * 1000,
	221	.uV_step = DA9121_STEP_MV * 1000,
	222	.linear_min_sel = DA9121_MIN_SEL,
	223	.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
	224	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	225	.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
	226	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	227	}
	228	};
	229
	230	static const struct regulator_desc da9122_reg[2] = {
	231	{
	232	.id = DA9121_IDX_BUCK1,
	233	.name = "DA9122/DA9131 BUCK1",
	234	.of_match = "buck1",
46c413d5	235	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	236	.owner = THIS_MODULE,
	237	.regulators_node = of_match_ptr("regulators"),
	238	.ops = &da9121_buck_ops,
	239	.type = REGULATOR_VOLTAGE,
	240	.n_voltages = DA9121_N_VOLTAGES,
	241	.min_uV = DA9121_MIN_MV * 1000,
	242	.uV_step = DA9121_STEP_MV * 1000,
	243	.linear_min_sel = DA9121_MIN_SEL,
	244	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	245	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	246	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	247	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	248	},
	249	{
	250	.id = DA9121_IDX_BUCK2,
	251	.name = "DA9122/DA9131 BUCK2",
	252	.of_match = "buck2",
46c413d5	253	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	254	.owner = THIS_MODULE,
	255	.regulators_node = of_match_ptr("regulators"),
	256	.ops = &da9121_buck_ops,
	257	.type = REGULATOR_VOLTAGE,
	258	.n_voltages = DA9121_N_VOLTAGES,
	259	.min_uV = DA9121_MIN_MV * 1000,
	260	.uV_step = DA9121_STEP_MV * 1000,
	261	.linear_min_sel = DA9121_MIN_SEL,
	262	.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
	263	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	264	.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
	265	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	266	}
	267	};
	268
	269	static const struct regulator_desc da9217_reg = {
	270	.id = DA9121_IDX_BUCK1,
	271	.name = "DA9217 BUCK1",
	272	.of_match = "buck1",
46c413d5	273	.of_parse_cb = da9121_of_parse_cb,
91863239 AW	274	.owner = THIS_MODULE,
	275	.regulators_node = of_match_ptr("regulators"),
	276	.ops = &da9121_buck_ops,
	277	.type = REGULATOR_VOLTAGE,
	278	.n_voltages = DA9121_N_VOLTAGES,
	279	.min_uV = DA9121_MIN_MV * 1000,
	280	.uV_step = DA9121_STEP_MV * 1000,
	281	.linear_min_sel = DA9121_MIN_SEL,
	282	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	283	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	284	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	285	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	286	};
	287
	288	static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
	289	[DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
	290	[DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
	291	[DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
	292	[DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
	293	};
	294
9929900d AW	295	static int da9121_set_regulator_config(struct da9121 *chip)
	296	{
	297	struct regulator_config config = { };
	298	unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
	299	int ret = 0;
	300	int i;
	301
	302	for (i = 0; i < max_matches; i++) {
	303	const struct regulator_desc *regl_desc =
	304	local_da9121_regulators[chip->variant_id][i];
	305
	306	config.dev = chip->dev;
	307	config.driver_data = chip;
	308	config.regmap = chip->regmap;
	309
	310	chip->rdev[i] = devm_regulator_register(chip->dev,
	311	regl_desc, &config);
	312	if (IS_ERR(chip->rdev[i])) {
	313	dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
	314	regl_desc->name, (i+1), max_matches);
	315	ret = PTR_ERR(chip->rdev[i]);
	316	goto error;
	317	}
	318	}
	319
	320	error:
	321	return ret;
	322	}
	323
c860476b AW	324	/* DA9121 chip register model */
	325	static const struct regmap_range da9121_1ch_readable_ranges[] = {
	326	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
	327	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	328	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	329	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
	330	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
	331	};
	332
	333	static const struct regmap_access_table da9121_1ch_readable_table = {
	334	.yes_ranges = da9121_1ch_readable_ranges,
	335	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
	336	};
	337
	338	static const struct regmap_range da9121_2ch_readable_ranges[] = {
	339	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
	340	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	341	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	342	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
	343	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
	344	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
	345	};
	346
	347	static const struct regmap_access_table da9121_2ch_readable_table = {
	348	.yes_ranges = da9121_2ch_readable_ranges,
	349	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
	350	};
	351
	352	static const struct regmap_range da9121_1ch_writeable_ranges[] = {
	353	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
	354	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	355	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	356	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
	357	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
	358	};
	359
	360	static const struct regmap_access_table da9121_1ch_writeable_table = {
	361	.yes_ranges = da9121_1ch_writeable_ranges,
	362	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
	363	};
	364
	365	static const struct regmap_range da9121_2ch_writeable_ranges[] = {
	366	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
	367	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
	368	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	369	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
	370	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
	371	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
	372	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
	373	};
	374
	375	static const struct regmap_access_table da9121_2ch_writeable_table = {
	376	.yes_ranges = da9121_2ch_writeable_ranges,
	377	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
	378	};
	379
	380
	381	static const struct regmap_range da9121_volatile_ranges[] = {
	382	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
	383	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
	384	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
	385	};
	386
	387	static const struct regmap_access_table da9121_volatile_table = {
388	.yes_ranges = da9121_volatile_ranges,
389	.n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
390	};
391
392	/* DA9121 regmap config for 1 channel variants */
393	static struct regmap_config da9121_1ch_regmap_config = {
394	.reg_bits = 8,
395	.val_bits = 8,
396	.max_register = DA9121_REG_OTP_CONFIG_ID,
397	.rd_table = &da9121_1ch_readable_table,
398	.wr_table = &da9121_1ch_writeable_table,
399	.volatile_table = &da9121_volatile_table,
400	.cache_type = REGCACHE_RBTREE,
401	};
402
403	/* DA9121 regmap config for 2 channel variants */
404	static struct regmap_config da9121_2ch_regmap_config = {
405	.reg_bits = 8,
406	.val_bits = 8,
407	.max_register = DA9121_REG_OTP_CONFIG_ID,
408	.rd_table = &da9121_2ch_readable_table,
409	.wr_table = &da9121_2ch_writeable_table,
410	.volatile_table = &da9121_volatile_table,
411	.cache_type = REGCACHE_RBTREE,
412	};
413
414	static int da9121_check_device_type(struct i2c_client i2c, struct da9121 chip)
415	{
416	u32 device_id;
417	u8 chip_id = chip->variant_id;
418	u32 variant_id;
419	u8 variant_mrc, variant_vrc;
420	char *type;
421	const char *name;
422	bool config_match = false;
423	int ret = 0;
424
425	ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
426	if (ret < 0) {
427	dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
428	goto error;
429	}
430
431	ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
432	if (ret < 0) {
433	dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
434	goto error;
435	}
436
437	if (device_id != DA9121_DEVICE_ID) {
438	dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
439	ret = -ENODEV;
440	goto error;
441	}
442
443	variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
444
445	switch (variant_vrc) {
446	case DA9121_VARIANT_VRC:
447	type = "DA9121/DA9130";
448	config_match = (chip_id == DA9121_TYPE_DA9121_DA9130);
449	break;
450	case DA9220_VARIANT_VRC:
451	type = "DA9220/DA9132";
452	config_match = (chip_id == DA9121_TYPE_DA9220_DA9132);
453	break;
454	case DA9122_VARIANT_VRC:
455	type = "DA9122/DA9131";
456	config_match = (chip_id == DA9121_TYPE_DA9122_DA9131);
457	break;
458	case DA9217_VARIANT_VRC:
459	type = "DA9217";
460	config_match = (chip_id == DA9121_TYPE_DA9217);
461	break;
462	default:
463	type = "Unknown";
464	break;
465	}
466
467	dev_info(chip->dev,
468	"Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
469	device_id, variant_id, type);
470
471	if (!config_match) {
472	dev_err(chip->dev, "Device tree configuration '%s' does not match detected device.\n", name);
473	ret = -EINVAL;
474	goto error;
475	}
476
477	variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
478	>> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
479
480	if ((device_id == DA9121_DEVICE_ID) &&
481	(variant_mrc < DA9121_VARIANT_MRC_BASE)) {
482	dev_err(chip->dev,
483	"Cannot support variant MRC: 0x%02X\n", variant_mrc);
484	ret = -EINVAL;
485	}
486	error:
487	return ret;
488	}
489
490	static int da9121_assign_chip_model(struct i2c_client *i2c,
491	struct da9121 *chip)
492	{
493	struct regmap_config *regmap;
494	int ret = 0;
495
496	chip->dev = &i2c->dev;
497
498	switch (chip->variant_id) {
499	case DA9121_TYPE_DA9121_DA9130:
500	fallthrough;
501	case DA9121_TYPE_DA9217:
502	regmap = &da9121_1ch_regmap_config;
503	break;
504	case DA9121_TYPE_DA9122_DA9131:
505	fallthrough;
506	case DA9121_TYPE_DA9220_DA9132:
507	regmap = &da9121_2ch_regmap_config;
508	break;
509	}
510
91863239 AW	511	/* Set these up for of_regulator_match call which may want .of_map_modes */
	512	da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
	513	da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
	514
c860476b AW	515	chip->regmap = devm_regmap_init_i2c(i2c, regmap);
	516	if (IS_ERR(chip->regmap)) {
	517	ret = PTR_ERR(chip->regmap);
	518	dev_err(chip->dev, "Failed to configure a register map: %d\n",
	519	ret);
	520	}
	521
	522	ret = da9121_check_device_type(i2c, chip);
	523
	524	return ret;
	525	}
	526
e6ff10f2	527	static const struct of_device_id da9121_dt_ids[] = {
f3fbd556 AW	528	{ .compatible = "dlg,da9121", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
	529	{ .compatible = "dlg,da9130", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
	530	{ .compatible = "dlg,da9217", .data = (void *) DA9121_TYPE_DA9217 },
	531	{ .compatible = "dlg,da9122", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
	532	{ .compatible = "dlg,da9131", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
	533	{ .compatible = "dlg,da9220", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
	534	{ .compatible = "dlg,da9132", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
e6ff10f2 VW	535	{ }
	536	};
	537	MODULE_DEVICE_TABLE(of, da9121_dt_ids);
	538
f3fbd556 AW	539	static inline int da9121_of_get_id(struct device *dev)
	540	{
	541	const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
	542
	543	if (!id) {
	544	dev_err(dev, "%s: Failed\n", __func__);
	545	return -EINVAL;
	546	}
	547	return (uintptr_t)id->data;
	548	}
	549
e6ff10f2 VW	550	static int da9121_i2c_probe(struct i2c_client *i2c,
	551	const struct i2c_device_id *id)
	552	{
f3fbd556 AW	553	struct da9121 *chip;
f3fbd556 AW	554	int ret = 0;
e6ff10f2	555
f3fbd556 AW	556	chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
	557	if (!chip) {
	558	ret = -ENOMEM;
	559	goto error;
	560	}
	561
46c413d5	562	chip->pdata = i2c->dev.platform_data;
f3fbd556 AW	563	chip->variant_id = da9121_of_get_id(&i2c->dev);
f3fbd556 AW	564
c860476b AW	565	ret = da9121_assign_chip_model(i2c, chip);
	566	if (ret < 0)
	567	goto error;
e6ff10f2	568
9929900d	569	ret = da9121_set_regulator_config(chip);
e6ff10f2	570
f3fbd556 AW	571	error:
f3fbd556 AW	572	return ret;
e6ff10f2 VW	573	}
	574
	575	static const struct i2c_device_id da9121_i2c_id[] = {
f3fbd556 AW	576	{"da9121", DA9121_TYPE_DA9121_DA9130},
	577	{"da9130", DA9121_TYPE_DA9121_DA9130},
	578	{"da9217", DA9121_TYPE_DA9217},
	579	{"da9122", DA9121_TYPE_DA9122_DA9131},
	580	{"da9131", DA9121_TYPE_DA9122_DA9131},
	581	{"da9220", DA9121_TYPE_DA9220_DA9132},
	582	{"da9132", DA9121_TYPE_DA9220_DA9132},
e6ff10f2 VW	583	{},
	584	};
	585	MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
	586
	587	static struct i2c_driver da9121_regulator_driver = {
	588	.driver = {
	589	.name = "da9121",
	590	.of_match_table = of_match_ptr(da9121_dt_ids),
	591	},
	592	.probe = da9121_i2c_probe,
	593	.id_table = da9121_i2c_id,
	594	};
	595
	596	module_i2c_driver(da9121_regulator_driver);
	597
	598	MODULE_LICENSE("GPL v2");