Unverified Commit 99ea37bd authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Mark Brown
Browse files

regulator: bd70528: Support ROHM BD70528 regulator block 



BD70528MWV is an ultra-low Iq general purpose single-chip power
management IC for battery-powered portable devices.

Add support for controlling 3 bucks and 3 LDOs present in
ROHM BD70528.

Signed-off-by: default avatarMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fd805d99

drivers/regulator/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -180,6 +180,17 @@ config REGULATOR_BCM590XX 
	  BCM590xx PMUs. This will enable support for the software

	  controllable LDO/Switching regulators.



config REGULATOR_BD70528

	tristate "ROHM BD70528 Power Regulator"

	depends on MFD_ROHM_BD70528

	help

	  This driver supports voltage regulators on ROHM BD70528 PMIC.

	  This will enable support for the software controllable buck

	  and LDO regulators.



	  This driver can also be built as a module. If so, the module

	  will be called bd70528-regulator.



config REGULATOR_BD718XX

	tristate "ROHM BD71837 Power Regulator"

	depends on MFD_ROHM_BD718XX

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o 
obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o

obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o

obj-$(CONFIG_REGULATOR_BCM590XX) += bcm590xx-regulator.o

obj-$(CONFIG_REGULATOR_BD70528) += bd70528-regulator.o

obj-$(CONFIG_REGULATOR_BD718XX) += bd718x7-regulator.o

obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o

obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o

drivers/regulator/bd70528-regulator.c

0 → 100644
+290 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

// Copyright (C) 2018 ROHM Semiconductors

// bd70528-regulator.c ROHM BD70528MWV regulator driver



#include <linux/delay.h>

#include <linux/err.h>

#include <linux/gpio.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/mfd/rohm-bd70528.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/slab.h>



#define BUCK_RAMPRATE_250MV 0

#define BUCK_RAMPRATE_125MV 1

#define BUCK_RAMP_MAX 250



static struct regulator_linear_range bd70528_buck1_volts[] = {

	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 600000),

	REGULATOR_LINEAR_RANGE(2750000, 0x2, 0xf, 50000),

};

static struct regulator_linear_range bd70528_buck2_volts[] = {

	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 300000),

	REGULATOR_LINEAR_RANGE(1550000, 0x2, 0xd, 50000),

	REGULATOR_LINEAR_RANGE(3000000, 0xe, 0xf, 300000),

};

static struct regulator_linear_range bd70528_buck3_volts[] = {

	REGULATOR_LINEAR_RANGE(800000, 0x00, 0xd, 50000),

	REGULATOR_LINEAR_RANGE(1800000, 0xe, 0xf, 0),

};



/* All LDOs have same voltage ranges */

static struct regulator_linear_range bd70528_ldo_volts[] = {

	REGULATOR_LINEAR_RANGE(1650000, 0x0, 0x07, 50000),

	REGULATOR_LINEAR_RANGE(2100000, 0x8, 0x0f, 100000),

	REGULATOR_LINEAR_RANGE(2850000, 0x10, 0x19, 50000),

	REGULATOR_LINEAR_RANGE(3300000, 0x19, 0x1f, 0),

};



/* Also both LEDs support same voltages */

static const unsigned int led_volts[] = {

	20000, 30000

};



static int bd70528_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)

{

	if (ramp_delay > 0 && ramp_delay <= BUCK_RAMP_MAX) {

		unsigned int ramp_value = BUCK_RAMPRATE_250MV;



		if (ramp_delay <= 125)

			ramp_value = BUCK_RAMPRATE_125MV;



		return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,

				  BD70528_MASK_BUCK_RAMP,

				  ramp_value << BD70528_SIFT_BUCK_RAMP);

	}

	dev_err(&rdev->dev, "%s: ramp_delay: %d not supported\n",

		rdev->desc->name, ramp_delay);

	return -EINVAL;

}



static int bd70528_led_set_voltage_sel(struct regulator_dev *rdev,

				       unsigned int sel)

{

	int ret;



	ret = regulator_is_enabled_regmap(rdev);

	if (ret < 0)

		return ret;



	if (ret == 0)

		return regulator_set_voltage_sel_regmap(rdev, sel);



	dev_err(&rdev->dev,

		"LED voltage change not allowed when led is enabled\n");



	return -EBUSY;

}



static struct regulator_ops bd70528_buck_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_linear_range,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_time_sel = regulator_set_voltage_time_sel,

	.set_ramp_delay = bd70528_set_ramp_delay,

};



static struct regulator_ops bd70528_ldo_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_linear_range,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_time_sel = regulator_set_voltage_time_sel,

	.set_ramp_delay = bd70528_set_ramp_delay,

};



static struct regulator_ops bd70528_led_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_table,

	.set_voltage_sel = bd70528_led_set_voltage_sel,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

};





static struct regulator_desc bd70528_desc[] = {

	{

		.name = "buck1",

		.of_match = of_match_ptr("BUCK1"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_BUCK1,

		.ops = &bd70528_buck_ops,

		.type = REGULATOR_VOLTAGE,

		.linear_ranges = bd70528_buck1_volts,

		.n_linear_ranges = ARRAY_SIZE(bd70528_buck1_volts),

		.n_voltages = BD70528_BUCK_VOLTS,

		.enable_reg = BD70528_REG_BUCK1_EN,

		.enable_mask = BD70528_MASK_RUN_EN,

		.vsel_reg = BD70528_REG_BUCK1_VOLT,

		.vsel_mask = BD70528_MASK_BUCK_VOLT,

		.owner = THIS_MODULE,

	},

	{

		.name = "buck2",

		.of_match = of_match_ptr("BUCK2"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_BUCK2,

		.ops = &bd70528_buck_ops,

		.type = REGULATOR_VOLTAGE,

		.linear_ranges = bd70528_buck2_volts,

		.n_linear_ranges = ARRAY_SIZE(bd70528_buck2_volts),

		.n_voltages = BD70528_BUCK_VOLTS,

		.enable_reg = BD70528_REG_BUCK2_EN,

		.enable_mask = BD70528_MASK_RUN_EN,

		.vsel_reg = BD70528_REG_BUCK2_VOLT,

		.vsel_mask = BD70528_MASK_BUCK_VOLT,

		.owner = THIS_MODULE,

	},

	{

		.name = "buck3",

		.of_match = of_match_ptr("BUCK3"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_BUCK3,

		.ops = &bd70528_buck_ops,

		.type = REGULATOR_VOLTAGE,

		.linear_ranges = bd70528_buck3_volts,

		.n_linear_ranges = ARRAY_SIZE(bd70528_buck3_volts),

		.n_voltages = BD70528_BUCK_VOLTS,

		.enable_reg = BD70528_REG_BUCK3_EN,

		.enable_mask = BD70528_MASK_RUN_EN,

		.vsel_reg = BD70528_REG_BUCK3_VOLT,

		.vsel_mask = BD70528_MASK_BUCK_VOLT,

		.owner = THIS_MODULE,

	},

	{

		.name = "ldo1",

		.of_match = of_match_ptr("LDO1"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_LDO1,

		.ops = &bd70528_ldo_ops,

		.type = REGULATOR_VOLTAGE,

		.linear_ranges = bd70528_ldo_volts,

		.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),

		.n_voltages = BD70528_LDO_VOLTS,

		.enable_reg = BD70528_REG_LDO1_EN,

		.enable_mask = BD70528_MASK_RUN_EN,

		.vsel_reg = BD70528_REG_LDO1_VOLT,

		.vsel_mask = BD70528_MASK_LDO_VOLT,

		.owner = THIS_MODULE,

	},

	{

		.name = "ldo2",

		.of_match = of_match_ptr("LDO2"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_LDO2,

		.ops = &bd70528_ldo_ops,

		.type = REGULATOR_VOLTAGE,

		.linear_ranges = bd70528_ldo_volts,

		.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),

		.n_voltages = BD70528_LDO_VOLTS,

		.enable_reg = BD70528_REG_LDO2_EN,

		.enable_mask = BD70528_MASK_RUN_EN,

		.vsel_reg = BD70528_REG_LDO2_VOLT,

		.vsel_mask = BD70528_MASK_LDO_VOLT,

		.owner = THIS_MODULE,

	},

	{

		.name = "ldo3",

		.of_match = of_match_ptr("LDO3"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_LDO3,

		.ops = &bd70528_ldo_ops,

		.type = REGULATOR_VOLTAGE,

		.linear_ranges = bd70528_ldo_volts,

		.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),

		.n_voltages = BD70528_LDO_VOLTS,

		.enable_reg = BD70528_REG_LDO3_EN,

		.enable_mask = BD70528_MASK_RUN_EN,

		.vsel_reg = BD70528_REG_LDO3_VOLT,

		.vsel_mask = BD70528_MASK_LDO_VOLT,

		.owner = THIS_MODULE,

	},

	{

		.name = "ldo_led1",

		.of_match = of_match_ptr("LDO_LED1"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_LED1,

		.ops = &bd70528_led_ops,

		.type = REGULATOR_VOLTAGE,

		.volt_table = &led_volts[0],

		.n_voltages = ARRAY_SIZE(led_volts),

		.enable_reg = BD70528_REG_LED_EN,

		.enable_mask = BD70528_MASK_LED1_EN,

		.vsel_reg = BD70528_REG_LED_VOLT,

		.vsel_mask = BD70528_MASK_LED1_VOLT,

		.owner = THIS_MODULE,

	},

	{

		.name = "ldo_led2",

		.of_match = of_match_ptr("LDO_LED2"),

		.regulators_node = of_match_ptr("regulators"),

		.id = BD70528_LED2,

		.ops = &bd70528_led_ops,

		.type = REGULATOR_VOLTAGE,

		.volt_table = &led_volts[0],

		.n_voltages = ARRAY_SIZE(led_volts),

		.enable_reg = BD70528_REG_LED_EN,

		.enable_mask = BD70528_MASK_LED2_EN,

		.vsel_reg = BD70528_REG_LED_VOLT,

		.vsel_mask = BD70528_MASK_LED2_VOLT,

		.owner = THIS_MODULE,

	},



};



static int bd70528_probe(struct platform_device *pdev)

{

	struct bd70528 *bd70528;

	int i;

	struct regulator_config config = {

		.dev = pdev->dev.parent,

	};



	bd70528 = dev_get_drvdata(pdev->dev.parent);

	if (!bd70528) {

		dev_err(&pdev->dev, "No MFD driver data\n");

		return -EINVAL;

	}



	config.regmap = bd70528->chip.regmap;



	for (i = 0; i < ARRAY_SIZE(bd70528_desc); i++) {

		struct regulator_dev *rdev;



		rdev = devm_regulator_register(&pdev->dev, &bd70528_desc[i],

					       &config);

		if (IS_ERR(rdev)) {

			dev_err(&pdev->dev,

				"failed to register %s regulator\n",

				bd70528_desc[i].name);

			return PTR_ERR(rdev);

		}

	}

	return 0;

}



static struct platform_driver bd70528_regulator = {

	.driver = {

		.name = "bd70528-pmic"

	},

	.probe = bd70528_probe,

};



module_platform_driver(bd70528_regulator);



MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");

MODULE_DESCRIPTION("BD70528 voltage regulator driver");

MODULE_LICENSE("GPL");

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