regulator: aw37503: add regulator driver for Awinic AW37503 (2796a01c) · Commits · EulixOS / Software / Kernel

drivers/regulator/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -178,6 +178,14 @@ config REGULATOR_ATC260X
		ATC260x PMICs. This will enable support for all the software
		controllable DCDC/LDO regulators.

		config REGULATOR_AW37503
		tristate "Awinic AW37503 Dual Output Power regulators"
		depends on I2C && GPIOLIB
		select REGMAP_I2C
		help
		This driver supports AW37503 single inductor - dual output
		power supply specifically designed for display panels.

		config REGULATOR_AXP20X
		tristate "X-POWERS AXP20X PMIC Regulators"
		depends on MFD_AXP20X

drivers/regulator/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ obj-$(CONFIG_REGULATOR_ARM_SCMI) += scmi-regulator.o
		obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
		obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
		obj-$(CONFIG_REGULATOR_ATC260X) += atc260x-regulator.o
		obj-$(CONFIG_REGULATOR_AW37503) += aw37503-regulator.o
		obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o
		obj-$(CONFIG_REGULATOR_BCM590XX) += bcm590xx-regulator.o
		obj-$(CONFIG_REGULATOR_BD71815) += bd71815-regulator.o

drivers/regulator/aw37503-regulator.c

0 → 100644

+240 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		//
		// AWINIC AW37503 Regulator Driver
		//
		// Copyright (C) 2023 awinic. All Rights Reserved
		//
		// Author: <like@awinic.com>

		#include <linux/err.h>
		#include <linux/gpio/consumer.h>
		#include <linux/i2c.h>
		#include <linux/module.h>
		#include <linux/regmap.h>
		#include <linux/regulator/driver.h>
		#include <linux/regulator/machine.h>

		#define AW37503_REG_VPOS 0x00
		#define AW37503_REG_VNEG 0x01
		#define AW37503_REG_APPS 0x03
		#define AW37503_REG_CONTROL 0x04
		#define AW37503_REG_WPRTEN 0x21

		#define AW37503_VOUT_MASK 0x1F
		#define AW37503_VOUT_N_VOLTAGE 0x15
		#define AW37503_VOUT_VMIN 4000000
		#define AW37503_VOUT_VMAX 6000000
		#define AW37503_VOUT_STEP 100000

		#define AW37503_REG_APPS_DIS_VPOS BIT(1)
		#define AW37503_REG_APPS_DIS_VNEG BIT(0)

		#define AW37503_REGULATOR_ID_VPOS 0
		#define AW37503_REGULATOR_ID_VNEG 1
		#define AW37503_MAX_REGULATORS 2

		struct aw37503_reg_pdata {
		struct gpio_desc *en_gpiod;
		int ena_gpio_state;
		};

		struct aw37503_regulator {
		struct device *dev;
		struct aw37503_reg_pdata reg_pdata[AW37503_MAX_REGULATORS];
		};

		static int aw37503_regulator_enable(struct regulator_dev *rdev)
		{
		struct aw37503_regulator *chip = rdev_get_drvdata(rdev);
		int id = rdev_get_id(rdev);
		struct aw37503_reg_pdata *rpdata = &chip->reg_pdata[id];
		int ret;

		if (!IS_ERR(rpdata->en_gpiod)) {
		gpiod_set_value_cansleep(rpdata->en_gpiod, 1);
		rpdata->ena_gpio_state = 1;
		}

		/* Hardware automatically enable discharge bit in enable */
		if (rdev->constraints->active_discharge ==
		REGULATOR_ACTIVE_DISCHARGE_DISABLE) {
		ret = regulator_set_active_discharge_regmap(rdev, false);
		if (ret < 0) {
		dev_err(chip->dev, "Failed to disable active discharge: %d\n",
		ret);
		return ret;
		}
		}

		return 0;
		}

		static int aw37503_regulator_disable(struct regulator_dev *rdev)
		{
		struct aw37503_regulator *chip = rdev_get_drvdata(rdev);
		int id = rdev_get_id(rdev);
		struct aw37503_reg_pdata *rpdata = &chip->reg_pdata[id];

		if (!IS_ERR(rpdata->en_gpiod)) {
		gpiod_set_value_cansleep(rpdata->en_gpiod, 0);
		rpdata->ena_gpio_state = 0;
		}

		return 0;
		}

		static int aw37503_regulator_is_enabled(struct regulator_dev *rdev)
		{
		struct aw37503_regulator *chip = rdev_get_drvdata(rdev);
		int id = rdev_get_id(rdev);
		struct aw37503_reg_pdata *rpdata = &chip->reg_pdata[id];

		if (!IS_ERR(rpdata->en_gpiod))
		return rpdata->ena_gpio_state;

		return 1;
		}

		static const struct regulator_ops aw37503_regulator_ops = {
		.enable = aw37503_regulator_enable,
		.disable = aw37503_regulator_disable,
		.is_enabled = aw37503_regulator_is_enabled,
		.list_voltage = regulator_list_voltage_linear,
		.map_voltage = regulator_map_voltage_linear,
		.get_voltage_sel = regulator_get_voltage_sel_regmap,
		.set_voltage_sel = regulator_set_voltage_sel_regmap,
		.set_active_discharge = regulator_set_active_discharge_regmap,
		};

		static int aw37503_of_parse_cb(struct device_node *np,
		const struct regulator_desc *desc,
		struct regulator_config *config)
		{
		struct aw37503_regulator *chip = config->driver_data;
		struct aw37503_reg_pdata *rpdata = &chip->reg_pdata[desc->id];
		int ret;

		rpdata->en_gpiod = devm_fwnode_gpiod_get(chip->dev, of_fwnode_handle(np),
		"enable", GPIOD_OUT_LOW,
		"enable");

		if (IS_ERR(rpdata->en_gpiod)) {
		ret = PTR_ERR(rpdata->en_gpiod);

		/* Ignore the error other than probe defer */
		if (ret == -EPROBE_DEFER)
		return ret;
		return 0;
		}

		return 0;
		}

		#define AW37503_REGULATOR_DESC(_id, _name) \
		[AW37503_REGULATOR_ID_##_id] = { \
		.name = "aw37503-"#_name, \
		.supply_name = "vin", \
		.id = AW37503_REGULATOR_ID_##_id, \
		.of_match = of_match_ptr(#_name), \
		.of_parse_cb = aw37503_of_parse_cb, \
		.ops = &aw37503_regulator_ops, \
		.n_voltages = AW37503_VOUT_N_VOLTAGE, \
		.min_uV = AW37503_VOUT_VMIN, \
		.uV_step = AW37503_VOUT_STEP, \
		.enable_time = 500, \
		.vsel_mask = AW37503_VOUT_MASK, \
		.vsel_reg = AW37503_REG_##_id, \
		.active_discharge_off = 0, \
		.active_discharge_on = AW37503_REG_APPS_DIS_##_id, \
		.active_discharge_mask = AW37503_REG_APPS_DIS_##_id, \
		.active_discharge_reg = AW37503_REG_APPS, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}

		static const struct regulator_desc aw_regs_desc[AW37503_MAX_REGULATORS] = {
		AW37503_REGULATOR_DESC(VPOS, outp),
		AW37503_REGULATOR_DESC(VNEG, outn),
		};

		static const struct regmap_range aw37503_no_reg_ranges[] = {
		regmap_reg_range(AW37503_REG_CONTROL + 1,
		AW37503_REG_WPRTEN - 1),
		};

		static const struct regmap_access_table aw37503_no_reg_table = {
		.no_ranges = aw37503_no_reg_ranges,
		.n_no_ranges = ARRAY_SIZE(aw37503_no_reg_ranges),
		};

		static const struct regmap_config aw37503_regmap_config = {
		.reg_bits = 8,
		.val_bits = 8,
		.max_register = AW37503_REG_WPRTEN,
		.rd_table = &aw37503_no_reg_table,
		.wr_table = &aw37503_no_reg_table,
		};

		static int aw37503_probe(struct i2c_client *client)
		{
		struct device *dev = &client->dev;
		struct aw37503_regulator *chip;
		struct regulator_dev *rdev;
		struct regmap *regmap;
		struct regulator_config config = { };
		int id;

		chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
		if (!chip)
		return -ENOMEM;

		regmap = devm_regmap_init_i2c(client, &aw37503_regmap_config);
		if (IS_ERR(regmap))
		return dev_err_probe(dev, PTR_ERR(regmap),
		"Failed to init regmap\n");

		i2c_set_clientdata(client, chip);
		chip->dev = dev;

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

		for (id = 0; id < AW37503_MAX_REGULATORS; ++id) {
		rdev = devm_regulator_register(dev, &aw_regs_desc[id],
		&config);
		if (IS_ERR(rdev))
		return dev_err_probe(dev, PTR_ERR(rdev),
		"Failed to register regulator %s\n",
		aw_regs_desc[id].name);
		}
		return 0;
		}

		static const struct i2c_device_id aw37503_id[] = {
		{.name = "aw37503",},
		{},
		};
		MODULE_DEVICE_TABLE(i2c, aw37503_id);

		static const struct of_device_id aw37503_of_match[] = {
		{.compatible = "awinic,aw37503",},
		{ /* Sentinel */ },
		};

		MODULE_DEVICE_TABLE(of, aw37503_of_match);

		static struct i2c_driver aw37503_i2c_driver = {
		.driver = {
		.name = "aw37503",
		.of_match_table = aw37503_of_match,
		},
		.probe_new = aw37503_probe,
		.id_table = aw37503_id,
		};

		module_i2c_driver(aw37503_i2c_driver);

		MODULE_DESCRIPTION("aw37503 regulator driver");
		MODULE_AUTHOR("Alec Li <like@awinic.com>");
		MODULE_LICENSE("GPL");