[deliverable/linux.git] / drivers / regulator / rk808-regulator.c

/*
 * Regulator driver for Rockchip RK808
 *
 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
 *
 * Author: Chris Zhong <zyw@rock-chips.com>
 * Author: Zhang Qing <zhangqing@rock-chips.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 */

#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/mfd/rk808.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#include <linux/gpio/consumer.h>

/* Field Definitions */
#define RK808_BUCK_VSEL_MASK	0x3f
#define RK808_BUCK4_VSEL_MASK	0xf
#define RK808_LDO_VSEL_MASK	0x1f

/* Ramp rate definitions for buck1 / buck2 only */
#define RK808_RAMP_RATE_OFFSET		3
#define RK808_RAMP_RATE_MASK		(3 << RK808_RAMP_RATE_OFFSET)
#define RK808_RAMP_RATE_2MV_PER_US	(0 << RK808_RAMP_RATE_OFFSET)
#define RK808_RAMP_RATE_4MV_PER_US	(1 << RK808_RAMP_RATE_OFFSET)
#define RK808_RAMP_RATE_6MV_PER_US	(2 << RK808_RAMP_RATE_OFFSET)
#define RK808_RAMP_RATE_10MV_PER_US	(3 << RK808_RAMP_RATE_OFFSET)

#define RK808_DVS2_POL		BIT(2)
#define RK808_DVS1_POL		BIT(1)

/* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
#define RK808_SLP_REG_OFFSET 1

/* Offset from XXX_ON_VSEL to XXX_DVS_VSEL */
#define RK808_DVS_REG_OFFSET 2

/* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
#define RK808_SLP_SET_OFF_REG_OFFSET 2

/* max steps for increase voltage of Buck1/2, equal 100mv*/
#define MAX_STEPS_ONE_TIME 8

struct rk808_regulator_data {
	struct gpio_desc *dvs_gpio[2];
};

static const int rk808_buck_config_regs[] = {
	RK808_BUCK1_CONFIG_REG,
	RK808_BUCK2_CONFIG_REG,
	RK808_BUCK3_CONFIG_REG,
	RK808_BUCK4_CONFIG_REG,
};

static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
};

static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
};

static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
};

static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
	REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
};

static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
};

static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
{
	struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
	int id = rdev->desc->id - RK808_ID_DCDC1;
	struct gpio_desc *gpio = pdata->dvs_gpio[id];
	unsigned int val;
	int ret;

	if (!gpio || gpiod_get_value(gpio) == 0)
		return regulator_get_voltage_sel_regmap(rdev);

	ret = regmap_read(rdev->regmap,
			  rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET,
			  &val);
	if (ret != 0)
		return ret;

	val &= rdev->desc->vsel_mask;
	val >>= ffs(rdev->desc->vsel_mask) - 1;

	return val;
}

static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev,
					     unsigned sel)
{
	int ret, delta_sel;
	unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask;

	ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
	if (ret != 0)
		return ret;

	tmp = val & ~mask;
	old_sel = val & mask;
	old_sel >>= ffs(mask) - 1;
	delta_sel = sel - old_sel;

	/*
	 * If directly modify the register to change the voltage, we will face
	 * the risk of overshoot. Put it into a multi-step, can effectively
	 * avoid this problem, a step is 100mv here.
	 */
	while (delta_sel > MAX_STEPS_ONE_TIME) {
		old_sel += MAX_STEPS_ONE_TIME;
		val = old_sel << (ffs(mask) - 1);
		val |= tmp;

		/*
		 * i2c is 400kHz (2.5us per bit) and we must transmit _at least_
		 * 3 bytes (24 bits) plus start and stop so 26 bits.  So we've
		 * got more than 65 us between each voltage change and thus
		 * won't ramp faster than ~1500 uV / us.
		 */
		ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
		delta_sel = sel - old_sel;
	}

	sel <<= ffs(mask) - 1;
	val = tmp | sel;
	ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);

	/*
	 * When we change the voltage register directly, the ramp rate is about
	 * 100000uv/us, wait 1us to make sure the target voltage to be stable,
	 * so we needn't wait extra time after that.
	 */
	udelay(1);

	return ret;
}

static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev,
					 unsigned sel)
{
	struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
	int id = rdev->desc->id - RK808_ID_DCDC1;
	struct gpio_desc *gpio = pdata->dvs_gpio[id];
	unsigned int reg = rdev->desc->vsel_reg;
	unsigned old_sel;
	int ret, gpio_level;

	if (!gpio)
		return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel);

	gpio_level = gpiod_get_value(gpio);
	if (gpio_level == 0) {
		reg += RK808_DVS_REG_OFFSET;
		ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel);
	} else {
		ret = regmap_read(rdev->regmap,
				  reg + RK808_DVS_REG_OFFSET,
				  &old_sel);
	}

	if (ret != 0)
		return ret;

	sel <<= ffs(rdev->desc->vsel_mask) - 1;
	sel |= old_sel & ~rdev->desc->vsel_mask;

	ret = regmap_write(rdev->regmap, reg, sel);
	if (ret)
		return ret;

	gpiod_set_value(gpio, !gpio_level);

	return ret;
}

static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev,
				       unsigned int old_selector,
				       unsigned int new_selector)
{
	struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
	int id = rdev->desc->id - RK808_ID_DCDC1;
	struct gpio_desc *gpio = pdata->dvs_gpio[id];

	/* if there is no dvs1/2 pin, we don't need wait extra time here. */
	if (!gpio)
		return 0;

	return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
}

static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
	unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
	unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
						  RK808_ID_DCDC1];

	switch (ramp_delay) {
	case 1 ... 2000:
		ramp_value = RK808_RAMP_RATE_2MV_PER_US;
		break;
	case 2001 ... 4000:
		ramp_value = RK808_RAMP_RATE_4MV_PER_US;
		break;
	case 4001 ... 6000:
		ramp_value = RK808_RAMP_RATE_6MV_PER_US;
		break;
	case 6001 ... 10000:
		break;
	default:
		pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
			rdev->desc->name, ramp_delay);
	}

	return regmap_update_bits(rdev->regmap, reg,
				  RK808_RAMP_RATE_MASK, ramp_value);
}

static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
{
	unsigned int reg;
	int sel = regulator_map_voltage_linear_range(rdev, uv, uv);

	if (sel < 0)
		return -EINVAL;

	reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;

	return regmap_update_bits(rdev->regmap, reg,
				  rdev->desc->vsel_mask,
				  sel);
}

static int rk808_set_suspend_enable(struct regulator_dev *rdev)
{
	unsigned int reg;

	reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;

	return regmap_update_bits(rdev->regmap, reg,
				  rdev->desc->enable_mask,
				  0);
}

static int rk808_set_suspend_disable(struct regulator_dev *rdev)
{
	unsigned int reg;

	reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;

	return regmap_update_bits(rdev->regmap, reg,
				  rdev->desc->enable_mask,
				  rdev->desc->enable_mask);
}

static struct regulator_ops rk808_buck1_2_ops = {
	.list_voltage		= regulator_list_voltage_linear_range,
	.map_voltage		= regulator_map_voltage_linear_range,
	.get_voltage_sel	= rk808_buck1_2_get_voltage_sel_regmap,
	.set_voltage_sel	= rk808_buck1_2_set_voltage_sel,
	.set_voltage_time_sel	= rk808_buck1_2_set_voltage_time_sel,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
	.set_ramp_delay		= rk808_set_ramp_delay,
	.set_suspend_voltage	= rk808_set_suspend_voltage,
	.set_suspend_enable	= rk808_set_suspend_enable,
	.set_suspend_disable	= rk808_set_suspend_disable,
};

static struct regulator_ops rk808_reg_ops = {
	.list_voltage		= regulator_list_voltage_linear_range,
	.map_voltage		= regulator_map_voltage_linear_range,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
	.set_suspend_voltage	= rk808_set_suspend_voltage,
	.set_suspend_enable	= rk808_set_suspend_enable,
	.set_suspend_disable	= rk808_set_suspend_disable,
};

static struct regulator_ops rk808_switch_ops = {
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
	.set_suspend_enable	= rk808_set_suspend_enable,
	.set_suspend_disable	= rk808_set_suspend_disable,
};

static const struct regulator_desc rk808_reg[] = {
	{
		.name = "DCDC_REG1",
		.supply_name = "vcc1",
		.id = RK808_ID_DCDC1,
		.ops = &rk808_buck1_2_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 64,
		.linear_ranges = rk808_buck_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
		.vsel_reg = RK808_BUCK1_ON_VSEL_REG,
		.vsel_mask = RK808_BUCK_VSEL_MASK,
		.enable_reg = RK808_DCDC_EN_REG,
		.enable_mask = BIT(0),
		.owner = THIS_MODULE,
	}, {
		.name = "DCDC_REG2",
		.supply_name = "vcc2",
		.id = RK808_ID_DCDC2,
		.ops = &rk808_buck1_2_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 64,
		.linear_ranges = rk808_buck_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
		.vsel_reg = RK808_BUCK2_ON_VSEL_REG,
		.vsel_mask = RK808_BUCK_VSEL_MASK,
		.enable_reg = RK808_DCDC_EN_REG,
		.enable_mask = BIT(1),
		.owner = THIS_MODULE,
	}, {
		.name = "DCDC_REG3",
		.supply_name = "vcc3",
		.id = RK808_ID_DCDC3,
		.ops = &rk808_switch_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 1,
		.enable_reg = RK808_DCDC_EN_REG,
		.enable_mask = BIT(2),
		.owner = THIS_MODULE,
	}, {
		.name = "DCDC_REG4",
		.supply_name = "vcc4",
		.id = RK808_ID_DCDC4,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 16,
		.linear_ranges = rk808_buck4_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
		.vsel_reg = RK808_BUCK4_ON_VSEL_REG,
		.vsel_mask = RK808_BUCK4_VSEL_MASK,
		.enable_reg = RK808_DCDC_EN_REG,
		.enable_mask = BIT(3),
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG1",
		.supply_name = "vcc6",
		.id = RK808_ID_LDO1,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 17,
		.linear_ranges = rk808_ldo_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
		.vsel_reg = RK808_LDO1_ON_VSEL_REG,
		.vsel_mask = RK808_LDO_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(0),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG2",
		.supply_name = "vcc6",
		.id = RK808_ID_LDO2,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 17,
		.linear_ranges = rk808_ldo_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
		.vsel_reg = RK808_LDO2_ON_VSEL_REG,
		.vsel_mask = RK808_LDO_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(1),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG3",
		.supply_name = "vcc7",
		.id = RK808_ID_LDO3,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 16,
		.linear_ranges = rk808_ldo3_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
		.vsel_reg = RK808_LDO3_ON_VSEL_REG,
		.vsel_mask = RK808_BUCK4_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(2),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG4",
		.supply_name = "vcc9",
		.id = RK808_ID_LDO4,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 17,
		.linear_ranges = rk808_ldo_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
		.vsel_reg = RK808_LDO4_ON_VSEL_REG,
		.vsel_mask = RK808_LDO_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(3),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG5",
		.supply_name = "vcc9",
		.id = RK808_ID_LDO5,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 17,
		.linear_ranges = rk808_ldo_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
		.vsel_reg = RK808_LDO5_ON_VSEL_REG,
		.vsel_mask = RK808_LDO_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(4),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG6",
		.supply_name = "vcc10",
		.id = RK808_ID_LDO6,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 18,
		.linear_ranges = rk808_ldo6_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
		.vsel_reg = RK808_LDO6_ON_VSEL_REG,
		.vsel_mask = RK808_LDO_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(5),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG7",
		.supply_name = "vcc7",
		.id = RK808_ID_LDO7,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 18,
		.linear_ranges = rk808_ldo6_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
		.vsel_reg = RK808_LDO7_ON_VSEL_REG,
		.vsel_mask = RK808_LDO_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(6),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "LDO_REG8",
		.supply_name = "vcc11",
		.id = RK808_ID_LDO8,
		.ops = &rk808_reg_ops,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 17,
		.linear_ranges = rk808_ldo_voltage_ranges,
		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
		.vsel_reg = RK808_LDO8_ON_VSEL_REG,
		.vsel_mask = RK808_LDO_VSEL_MASK,
		.enable_reg = RK808_LDO_EN_REG,
		.enable_mask = BIT(7),
		.enable_time = 400,
		.owner = THIS_MODULE,
	}, {
		.name = "SWITCH_REG1",
		.supply_name = "vcc8",
		.id = RK808_ID_SWITCH1,
		.ops = &rk808_switch_ops,
		.type = REGULATOR_VOLTAGE,
		.enable_reg = RK808_DCDC_EN_REG,
		.enable_mask = BIT(5),
		.owner = THIS_MODULE,
	}, {
		.name = "SWITCH_REG2",
		.supply_name = "vcc12",
		.id = RK808_ID_SWITCH2,
		.ops = &rk808_switch_ops,
		.type = REGULATOR_VOLTAGE,
		.enable_reg = RK808_DCDC_EN_REG,
		.enable_mask = BIT(6),
		.owner = THIS_MODULE,
	},
};

static struct of_regulator_match rk808_reg_matches[] = {
	[RK808_ID_DCDC1]	= { .name = "DCDC_REG1" },
	[RK808_ID_DCDC2]	= { .name = "DCDC_REG2" },
	[RK808_ID_DCDC3]	= { .name = "DCDC_REG3" },
	[RK808_ID_DCDC4]	= { .name = "DCDC_REG4" },
	[RK808_ID_LDO1]		= { .name = "LDO_REG1" },
	[RK808_ID_LDO2]		= { .name = "LDO_REG2" },
	[RK808_ID_LDO3]		= { .name = "LDO_REG3" },
	[RK808_ID_LDO4]		= { .name = "LDO_REG4" },
	[RK808_ID_LDO5]		= { .name = "LDO_REG5" },
	[RK808_ID_LDO6]		= { .name = "LDO_REG6" },
	[RK808_ID_LDO7]		= { .name = "LDO_REG7" },
	[RK808_ID_LDO8]		= { .name = "LDO_REG8" },
	[RK808_ID_SWITCH1]	= { .name = "SWITCH_REG1" },
	[RK808_ID_SWITCH2]	= { .name = "SWITCH_REG2" },
};

static int rk808_regulator_dt_parse_pdata(struct device *dev,
				   struct device *client_dev,
				   struct regmap *map,
				   struct rk808_regulator_data *pdata)
{
	struct device_node *np;
	int tmp, ret, i;

	np = of_get_child_by_name(client_dev->of_node, "regulators");
	if (!np)
		return -ENXIO;

	ret = of_regulator_match(dev, np, rk808_reg_matches,
				 RK808_NUM_REGULATORS);
	if (ret < 0)
		goto dt_parse_end;

	for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
		pdata->dvs_gpio[i] =
			devm_gpiod_get_index_optional(client_dev, "dvs", i,
						      GPIOD_OUT_LOW);
		if (IS_ERR(pdata->dvs_gpio[i])) {
			ret = PTR_ERR(pdata->dvs_gpio[i]);
			dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
			goto dt_parse_end;
		}

		if (!pdata->dvs_gpio[i]) {
			dev_warn(dev, "there is no dvs%d gpio\n", i);
			continue;
		}

		tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
		ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
				gpiod_is_active_low(pdata->dvs_gpio[i]) ?
				0 : tmp);
	}

dt_parse_end:
	of_node_put(np);
	return ret;
}

static int rk808_regulator_probe(struct platform_device *pdev)
{
	struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
	struct i2c_client *client = rk808->i2c;
	struct regulator_config config = {};
	struct regulator_dev *rk808_rdev;
	struct rk808_regulator_data *pdata;
	int ret, i;

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
					     rk808->regmap, pdata);
	if (ret < 0)
		return ret;

	platform_set_drvdata(pdev, pdata);

	/* Instantiate the regulators */
	for (i = 0; i < RK808_NUM_REGULATORS; i++) {
		if (!rk808_reg_matches[i].init_data ||
		    !rk808_reg_matches[i].of_node)
			continue;

		config.dev = &client->dev;
		config.driver_data = pdata;
		config.regmap = rk808->regmap;
		config.of_node = rk808_reg_matches[i].of_node;
		config.init_data = rk808_reg_matches[i].init_data;

		rk808_rdev = devm_regulator_register(&pdev->dev,
						     &rk808_reg[i], &config);
		if (IS_ERR(rk808_rdev)) {
			dev_err(&client->dev,
				"failed to register %d regulator\n", i);
			return PTR_ERR(rk808_rdev);
		}
	}

	return 0;
}

static struct platform_driver rk808_regulator_driver = {
	.probe = rk808_regulator_probe,
	.driver = {
		.name = "rk808-regulator",
		.owner = THIS_MODULE,
	},
};

module_platform_driver(rk808_regulator_driver);

MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:rk808-regulator");
Commit	Line	Data
2cd64ae3 CZ	1	/*
	2	* Regulator driver for Rockchip RK808
	3	*
	4	* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
	5	*
	6	* Author: Chris Zhong <zyw@rock-chips.com>
	7	* Author: Zhang Qing <zhangqing@rock-chips.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms and conditions of the GNU General Public License,
	11	* version 2, as published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope it will be useful, but WITHOUT
	14	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	15	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	16	* more details.
2cd64ae3 CZ	17	*/
2cd64ae3 CZ	18
bad47ad2 CZ	19	#include <linux/delay.h>
bad47ad2 CZ	20	#include <linux/gpio.h>
2cd64ae3	21	#include <linux/i2c.h>
bad47ad2	22	#include <linux/module.h>
2cd64ae3	23	#include <linux/of_device.h>
bad47ad2 CZ	24	#include <linux/of_gpio.h>
bad47ad2 CZ	25	#include <linux/mfd/rk808.h>
2cd64ae3 CZ	26	#include <linux/regulator/driver.h>
2cd64ae3 CZ	27	#include <linux/regulator/of_regulator.h>
604d4994	28	#include <linux/gpio/consumer.h>
571a4010 CZ	29
571a4010 CZ	30	/* Field Definitions */
2cd64ae3 CZ	31	#define RK808_BUCK_VSEL_MASK 0x3f
	32	#define RK808_BUCK4_VSEL_MASK 0xf
	33	#define RK808_LDO_VSEL_MASK 0x1f
	34
8af25227 DA	35	/* Ramp rate definitions for buck1 / buck2 only */
	36	#define RK808_RAMP_RATE_OFFSET 3
	37	#define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET)
	38	#define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET)
	39	#define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET)
	40	#define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET)
	41	#define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET)
	42
bad47ad2 CZ	43	#define RK808_DVS2_POL BIT(2)
	44	#define RK808_DVS1_POL BIT(1)
	45
251ce318 CZ	46	/* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
	47	#define RK808_SLP_REG_OFFSET 1
	48
bad47ad2 CZ	49	/* Offset from XXX_ON_VSEL to XXX_DVS_VSEL */
	50	#define RK808_DVS_REG_OFFSET 2
	51
251ce318 CZ	52	/* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
	53	#define RK808_SLP_SET_OFF_REG_OFFSET 2
	54
bad47ad2 CZ	55	/* max steps for increase voltage of Buck1/2, equal 100mv*/
	56	#define MAX_STEPS_ONE_TIME 8
	57
	58	struct rk808_regulator_data {
	59	struct gpio_desc *dvs_gpio[2];
	60	};
	61
8af25227 DA	62	static const int rk808_buck_config_regs[] = {
	63	RK808_BUCK1_CONFIG_REG,
	64	RK808_BUCK2_CONFIG_REG,
	65	RK808_BUCK3_CONFIG_REG,
	66	RK808_BUCK4_CONFIG_REG,
	67	};
	68
2cd64ae3	69	static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
1575e288	70	REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
2cd64ae3 CZ	71	};
	72
	73	static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
	74	REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
	75	};
	76
	77	static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
	78	REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
	79	};
	80
	81	static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
	82	REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
	83	REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
	84	};
	85
	86	static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
	87	REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
	88	};
	89
bad47ad2 CZ	90	static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
	91	{
	92	struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
	93	int id = rdev->desc->id - RK808_ID_DCDC1;
	94	struct gpio_desc *gpio = pdata->dvs_gpio[id];
	95	unsigned int val;
	96	int ret;
	97
a13eaf02	98	if (!gpio \|\| gpiod_get_value(gpio) == 0)
bad47ad2 CZ	99	return regulator_get_voltage_sel_regmap(rdev);
	100
	101	ret = regmap_read(rdev->regmap,
	102	rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET,
	103	&val);
	104	if (ret != 0)
	105	return ret;
	106
	107	val &= rdev->desc->vsel_mask;
	108	val >>= ffs(rdev->desc->vsel_mask) - 1;
	109
	110	return val;
	111	}
	112
	113	static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev,
	114	unsigned sel)
	115	{
	116	int ret, delta_sel;
	117	unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask;
	118
	119	ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
	120	if (ret != 0)
	121	return ret;
	122
	123	tmp = val & ~mask;
	124	old_sel = val & mask;
	125	old_sel >>= ffs(mask) - 1;
	126	delta_sel = sel - old_sel;
	127
	128	/*
	129	* If directly modify the register to change the voltage, we will face
	130	* the risk of overshoot. Put it into a multi-step, can effectively
	131	* avoid this problem, a step is 100mv here.
	132	*/
	133	while (delta_sel > MAX_STEPS_ONE_TIME) {
	134	old_sel += MAX_STEPS_ONE_TIME;
	135	val = old_sel << (ffs(mask) - 1);
	136	val \|= tmp;
	137
	138	/*
	139	* i2c is 400kHz (2.5us per bit) and we must transmit _at least_
	140	* 3 bytes (24 bits) plus start and stop so 26 bits. So we've
	141	* got more than 65 us between each voltage change and thus
	142	* won't ramp faster than ~1500 uV / us.
	143	*/
	144	ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
	145	delta_sel = sel - old_sel;
	146	}
	147
	148	sel <<= ffs(mask) - 1;
	149	val = tmp \| sel;
	150	ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
	151
	152	/*
	153	* When we change the voltage register directly, the ramp rate is about
	154	* 100000uv/us, wait 1us to make sure the target voltage to be stable,
	155	* so we needn't wait extra time after that.
	156	*/
	157	udelay(1);
	158
	159	return ret;
	160	}
	161
	162	static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev,
163	unsigned sel)
164	{
165	struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
166	int id = rdev->desc->id - RK808_ID_DCDC1;
167	struct gpio_desc *gpio = pdata->dvs_gpio[id];
168	unsigned int reg = rdev->desc->vsel_reg;
169	unsigned old_sel;
170	int ret, gpio_level;
171
a13eaf02	172	if (!gpio)
bad47ad2 CZ	173	return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel);
	174
	175	gpio_level = gpiod_get_value(gpio);
	176	if (gpio_level == 0) {
	177	reg += RK808_DVS_REG_OFFSET;
	178	ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel);
	179	} else {
	180	ret = regmap_read(rdev->regmap,
	181	reg + RK808_DVS_REG_OFFSET,
	182	&old_sel);
	183	}
	184
	185	if (ret != 0)
	186	return ret;
	187
	188	sel <<= ffs(rdev->desc->vsel_mask) - 1;
	189	sel \|= old_sel & ~rdev->desc->vsel_mask;
	190
	191	ret = regmap_write(rdev->regmap, reg, sel);
	192	if (ret)
	193	return ret;
	194
	195	gpiod_set_value(gpio, !gpio_level);
	196
	197	return ret;
	198	}
	199
	200	static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev,
	201	unsigned int old_selector,
	202	unsigned int new_selector)
	203	{
	204	struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
	205	int id = rdev->desc->id - RK808_ID_DCDC1;
	206	struct gpio_desc *gpio = pdata->dvs_gpio[id];
	207
	208	/* if there is no dvs1/2 pin, we don't need wait extra time here. */
a13eaf02	209	if (!gpio)
bad47ad2 CZ	210	return 0;
	211
	212	return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
	213	}
	214
8af25227 DA	215	static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	216	{
	217	unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
	218	unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
	219	RK808_ID_DCDC1];
	220
	221	switch (ramp_delay) {
	222	case 1 ... 2000:
	223	ramp_value = RK808_RAMP_RATE_2MV_PER_US;
	224	break;
	225	case 2001 ... 4000:
	226	ramp_value = RK808_RAMP_RATE_4MV_PER_US;
	227	break;
	228	case 4001 ... 6000:
	229	ramp_value = RK808_RAMP_RATE_6MV_PER_US;
	230	break;
	231	case 6001 ... 10000:
	232	break;
	233	default:
	234	pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
	235	rdev->desc->name, ramp_delay);
	236	}
	237
	238	return regmap_update_bits(rdev->regmap, reg,
	239	RK808_RAMP_RATE_MASK, ramp_value);
	240	}
	241
5cb2f03c	242	static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
251ce318 CZ	243	{
	244	unsigned int reg;
	245	int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
	246
	247	if (sel < 0)
	248	return -EINVAL;
	249
	250	reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
	251
	252	return regmap_update_bits(rdev->regmap, reg,
	253	rdev->desc->vsel_mask,
	254	sel);
	255	}
	256
5cb2f03c	257	static int rk808_set_suspend_enable(struct regulator_dev *rdev)
251ce318 CZ	258	{
	259	unsigned int reg;
	260
	261	reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
	262
	263	return regmap_update_bits(rdev->regmap, reg,
	264	rdev->desc->enable_mask,
	265	0);
	266	}
	267
5cb2f03c	268	static int rk808_set_suspend_disable(struct regulator_dev *rdev)
251ce318 CZ	269	{
	270	unsigned int reg;
	271
	272	reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
	273
	274	return regmap_update_bits(rdev->regmap, reg,
	275	rdev->desc->enable_mask,
	276	rdev->desc->enable_mask);
	277	}
	278
8af25227 DA	279	static struct regulator_ops rk808_buck1_2_ops = {
	280	.list_voltage = regulator_list_voltage_linear_range,
	281	.map_voltage = regulator_map_voltage_linear_range,
bad47ad2 CZ	282	.get_voltage_sel = rk808_buck1_2_get_voltage_sel_regmap,
	283	.set_voltage_sel = rk808_buck1_2_set_voltage_sel,
	284	.set_voltage_time_sel = rk808_buck1_2_set_voltage_time_sel,
8af25227 DA	285	.enable = regulator_enable_regmap,
	286	.disable = regulator_disable_regmap,
	287	.is_enabled = regulator_is_enabled_regmap,
	288	.set_ramp_delay = rk808_set_ramp_delay,
251ce318 CZ	289	.set_suspend_voltage = rk808_set_suspend_voltage,
	290	.set_suspend_enable = rk808_set_suspend_enable,
	291	.set_suspend_disable = rk808_set_suspend_disable,
8af25227 DA	292	};
8af25227 DA	293
2cd64ae3 CZ	294	static struct regulator_ops rk808_reg_ops = {
	295	.list_voltage = regulator_list_voltage_linear_range,
	296	.map_voltage = regulator_map_voltage_linear_range,
	297	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	298	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	299	.enable = regulator_enable_regmap,
	300	.disable = regulator_disable_regmap,
	301	.is_enabled = regulator_is_enabled_regmap,
251ce318 CZ	302	.set_suspend_voltage = rk808_set_suspend_voltage,
	303	.set_suspend_enable = rk808_set_suspend_enable,
	304	.set_suspend_disable = rk808_set_suspend_disable,
2cd64ae3 CZ	305	};
	306
	307	static struct regulator_ops rk808_switch_ops = {
251ce318 CZ	308	.enable = regulator_enable_regmap,
	309	.disable = regulator_disable_regmap,
	310	.is_enabled = regulator_is_enabled_regmap,
	311	.set_suspend_enable = rk808_set_suspend_enable,
	312	.set_suspend_disable = rk808_set_suspend_disable,
2cd64ae3 CZ	313	};
	314
	315	static const struct regulator_desc rk808_reg[] = {
	316	{
	317	.name = "DCDC_REG1",
b8074eba	318	.supply_name = "vcc1",
2cd64ae3	319	.id = RK808_ID_DCDC1,
8af25227	320	.ops = &rk808_buck1_2_ops,
2cd64ae3 CZ	321	.type = REGULATOR_VOLTAGE,
	322	.n_voltages = 64,
	323	.linear_ranges = rk808_buck_voltage_ranges,
	324	.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
	325	.vsel_reg = RK808_BUCK1_ON_VSEL_REG,
	326	.vsel_mask = RK808_BUCK_VSEL_MASK,
	327	.enable_reg = RK808_DCDC_EN_REG,
	328	.enable_mask = BIT(0),
	329	.owner = THIS_MODULE,
	330	}, {
	331	.name = "DCDC_REG2",
b8074eba	332	.supply_name = "vcc2",
2cd64ae3	333	.id = RK808_ID_DCDC2,
8af25227	334	.ops = &rk808_buck1_2_ops,
2cd64ae3 CZ	335	.type = REGULATOR_VOLTAGE,
	336	.n_voltages = 64,
	337	.linear_ranges = rk808_buck_voltage_ranges,
	338	.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
	339	.vsel_reg = RK808_BUCK2_ON_VSEL_REG,
	340	.vsel_mask = RK808_BUCK_VSEL_MASK,
	341	.enable_reg = RK808_DCDC_EN_REG,
	342	.enable_mask = BIT(1),
	343	.owner = THIS_MODULE,
	344	}, {
	345	.name = "DCDC_REG3",
b8074eba	346	.supply_name = "vcc3",
2cd64ae3 CZ	347	.id = RK808_ID_DCDC3,
	348	.ops = &rk808_switch_ops,
	349	.type = REGULATOR_VOLTAGE,
	350	.n_voltages = 1,
	351	.enable_reg = RK808_DCDC_EN_REG,
	352	.enable_mask = BIT(2),
	353	.owner = THIS_MODULE,
	354	}, {
	355	.name = "DCDC_REG4",
b8074eba	356	.supply_name = "vcc4",
2cd64ae3 CZ	357	.id = RK808_ID_DCDC4,
	358	.ops = &rk808_reg_ops,
	359	.type = REGULATOR_VOLTAGE,
5a82067f	360	.n_voltages = 16,
2cd64ae3 CZ	361	.linear_ranges = rk808_buck4_voltage_ranges,
	362	.n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
	363	.vsel_reg = RK808_BUCK4_ON_VSEL_REG,
	364	.vsel_mask = RK808_BUCK4_VSEL_MASK,
	365	.enable_reg = RK808_DCDC_EN_REG,
	366	.enable_mask = BIT(3),
	367	.owner = THIS_MODULE,
	368	}, {
	369	.name = "LDO_REG1",
b8074eba	370	.supply_name = "vcc6",
2cd64ae3 CZ	371	.id = RK808_ID_LDO1,
	372	.ops = &rk808_reg_ops,
	373	.type = REGULATOR_VOLTAGE,
	374	.n_voltages = 17,
	375	.linear_ranges = rk808_ldo_voltage_ranges,
	376	.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
	377	.vsel_reg = RK808_LDO1_ON_VSEL_REG,
	378	.vsel_mask = RK808_LDO_VSEL_MASK,
	379	.enable_reg = RK808_LDO_EN_REG,
	380	.enable_mask = BIT(0),
28249b0c	381	.enable_time = 400,
2cd64ae3 CZ	382	.owner = THIS_MODULE,
	383	}, {
	384	.name = "LDO_REG2",
b8074eba	385	.supply_name = "vcc6",
2cd64ae3 CZ	386	.id = RK808_ID_LDO2,
	387	.ops = &rk808_reg_ops,
	388	.type = REGULATOR_VOLTAGE,
	389	.n_voltages = 17,
	390	.linear_ranges = rk808_ldo_voltage_ranges,
	391	.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
	392	.vsel_reg = RK808_LDO2_ON_VSEL_REG,
	393	.vsel_mask = RK808_LDO_VSEL_MASK,
	394	.enable_reg = RK808_LDO_EN_REG,
	395	.enable_mask = BIT(1),
28249b0c	396	.enable_time = 400,
2cd64ae3 CZ	397	.owner = THIS_MODULE,
	398	}, {
	399	.name = "LDO_REG3",
b8074eba	400	.supply_name = "vcc7",
2cd64ae3 CZ	401	.id = RK808_ID_LDO3,
	402	.ops = &rk808_reg_ops,
	403	.type = REGULATOR_VOLTAGE,
	404	.n_voltages = 16,
	405	.linear_ranges = rk808_ldo3_voltage_ranges,
	406	.n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
	407	.vsel_reg = RK808_LDO3_ON_VSEL_REG,
	408	.vsel_mask = RK808_BUCK4_VSEL_MASK,
	409	.enable_reg = RK808_LDO_EN_REG,
	410	.enable_mask = BIT(2),
28249b0c	411	.enable_time = 400,
2cd64ae3 CZ	412	.owner = THIS_MODULE,
	413	}, {
	414	.name = "LDO_REG4",
b8074eba	415	.supply_name = "vcc9",
2cd64ae3 CZ	416	.id = RK808_ID_LDO4,
	417	.ops = &rk808_reg_ops,
	418	.type = REGULATOR_VOLTAGE,
	419	.n_voltages = 17,
	420	.linear_ranges = rk808_ldo_voltage_ranges,
	421	.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
	422	.vsel_reg = RK808_LDO4_ON_VSEL_REG,
	423	.vsel_mask = RK808_LDO_VSEL_MASK,
	424	.enable_reg = RK808_LDO_EN_REG,
	425	.enable_mask = BIT(3),
28249b0c	426	.enable_time = 400,
2cd64ae3 CZ	427	.owner = THIS_MODULE,
	428	}, {
	429	.name = "LDO_REG5",
b8074eba	430	.supply_name = "vcc9",
2cd64ae3 CZ	431	.id = RK808_ID_LDO5,
	432	.ops = &rk808_reg_ops,
	433	.type = REGULATOR_VOLTAGE,
	434	.n_voltages = 17,
	435	.linear_ranges = rk808_ldo_voltage_ranges,
	436	.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
	437	.vsel_reg = RK808_LDO5_ON_VSEL_REG,
	438	.vsel_mask = RK808_LDO_VSEL_MASK,
	439	.enable_reg = RK808_LDO_EN_REG,
	440	.enable_mask = BIT(4),
28249b0c	441	.enable_time = 400,
2cd64ae3 CZ	442	.owner = THIS_MODULE,
	443	}, {
	444	.name = "LDO_REG6",
b8074eba	445	.supply_name = "vcc10",
2cd64ae3 CZ	446	.id = RK808_ID_LDO6,
	447	.ops = &rk808_reg_ops,
	448	.type = REGULATOR_VOLTAGE,
	449	.n_voltages = 18,
	450	.linear_ranges = rk808_ldo6_voltage_ranges,
	451	.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
	452	.vsel_reg = RK808_LDO6_ON_VSEL_REG,
	453	.vsel_mask = RK808_LDO_VSEL_MASK,
	454	.enable_reg = RK808_LDO_EN_REG,
	455	.enable_mask = BIT(5),
28249b0c	456	.enable_time = 400,
2cd64ae3 CZ	457	.owner = THIS_MODULE,
	458	}, {
	459	.name = "LDO_REG7",
b8074eba	460	.supply_name = "vcc7",
2cd64ae3 CZ	461	.id = RK808_ID_LDO7,
	462	.ops = &rk808_reg_ops,
	463	.type = REGULATOR_VOLTAGE,
	464	.n_voltages = 18,
	465	.linear_ranges = rk808_ldo6_voltage_ranges,
	466	.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
	467	.vsel_reg = RK808_LDO7_ON_VSEL_REG,
	468	.vsel_mask = RK808_LDO_VSEL_MASK,
	469	.enable_reg = RK808_LDO_EN_REG,
	470	.enable_mask = BIT(6),
28249b0c	471	.enable_time = 400,
2cd64ae3 CZ	472	.owner = THIS_MODULE,
	473	}, {
	474	.name = "LDO_REG8",
b8074eba	475	.supply_name = "vcc11",
2cd64ae3 CZ	476	.id = RK808_ID_LDO8,
	477	.ops = &rk808_reg_ops,
	478	.type = REGULATOR_VOLTAGE,
	479	.n_voltages = 17,
	480	.linear_ranges = rk808_ldo_voltage_ranges,
	481	.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
	482	.vsel_reg = RK808_LDO8_ON_VSEL_REG,
	483	.vsel_mask = RK808_LDO_VSEL_MASK,
	484	.enable_reg = RK808_LDO_EN_REG,
	485	.enable_mask = BIT(7),
28249b0c	486	.enable_time = 400,
2cd64ae3 CZ	487	.owner = THIS_MODULE,
	488	}, {
	489	.name = "SWITCH_REG1",
b8074eba	490	.supply_name = "vcc8",
2cd64ae3 CZ	491	.id = RK808_ID_SWITCH1,
	492	.ops = &rk808_switch_ops,
	493	.type = REGULATOR_VOLTAGE,
	494	.enable_reg = RK808_DCDC_EN_REG,
	495	.enable_mask = BIT(5),
	496	.owner = THIS_MODULE,
	497	}, {
	498	.name = "SWITCH_REG2",
b8074eba	499	.supply_name = "vcc12",
2cd64ae3 CZ	500	.id = RK808_ID_SWITCH2,
	501	.ops = &rk808_switch_ops,
	502	.type = REGULATOR_VOLTAGE,
	503	.enable_reg = RK808_DCDC_EN_REG,
	504	.enable_mask = BIT(6),
	505	.owner = THIS_MODULE,
	506	},
	507	};
	508
	509	static struct of_regulator_match rk808_reg_matches[] = {
	510	[RK808_ID_DCDC1] = { .name = "DCDC_REG1" },
	511	[RK808_ID_DCDC2] = { .name = "DCDC_REG2" },
	512	[RK808_ID_DCDC3] = { .name = "DCDC_REG3" },
	513	[RK808_ID_DCDC4] = { .name = "DCDC_REG4" },
	514	[RK808_ID_LDO1] = { .name = "LDO_REG1" },
	515	[RK808_ID_LDO2] = { .name = "LDO_REG2" },
	516	[RK808_ID_LDO3] = { .name = "LDO_REG3" },
	517	[RK808_ID_LDO4] = { .name = "LDO_REG4" },
	518	[RK808_ID_LDO5] = { .name = "LDO_REG5" },
	519	[RK808_ID_LDO6] = { .name = "LDO_REG6" },
	520	[RK808_ID_LDO7] = { .name = "LDO_REG7" },
	521	[RK808_ID_LDO8] = { .name = "LDO_REG8" },
	522	[RK808_ID_SWITCH1] = { .name = "SWITCH_REG1" },
	523	[RK808_ID_SWITCH2] = { .name = "SWITCH_REG2" },
	524	};
	525
bad47ad2 CZ	526	static int rk808_regulator_dt_parse_pdata(struct device *dev,
	527	struct device *client_dev,
	528	struct regmap *map,
	529	struct rk808_regulator_data *pdata)
	530	{
	531	struct device_node *np;
	532	int tmp, ret, i;
	533
	534	np = of_get_child_by_name(client_dev->of_node, "regulators");
	535	if (!np)
	536	return -ENXIO;
	537
	538	ret = of_regulator_match(dev, np, rk808_reg_matches,
	539	RK808_NUM_REGULATORS);
	540	if (ret < 0)
	541	goto dt_parse_end;
	542
	543	for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
a13eaf02 UKK	544	pdata->dvs_gpio[i] =
	545	devm_gpiod_get_index_optional(client_dev, "dvs", i,
	546	GPIOD_OUT_LOW);
bad47ad2	547	if (IS_ERR(pdata->dvs_gpio[i])) {
a13eaf02 UKK	548	ret = PTR_ERR(pdata->dvs_gpio[i]);
	549	dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
	550	goto dt_parse_end;
	551	}
	552
	553	if (!pdata->dvs_gpio[i]) {
bad47ad2 CZ	554	dev_warn(dev, "there is no dvs%d gpio\n", i);
	555	continue;
	556	}
	557
bad47ad2 CZ	558	tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
	559	ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
	560	gpiod_is_active_low(pdata->dvs_gpio[i]) ?
	561	0 : tmp);
	562	}
	563
	564	dt_parse_end:
	565	of_node_put(np);
	566	return ret;
	567	}
	568
2cd64ae3 CZ	569	static int rk808_regulator_probe(struct platform_device *pdev)
	570	{
	571	struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
d76c333e	572	struct i2c_client *client = rk808->i2c;
462004f1	573	struct regulator_config config = {};
2cd64ae3	574	struct regulator_dev *rk808_rdev;
bad47ad2	575	struct rk808_regulator_data *pdata;
571a4010	576	int ret, i;
2cd64ae3	577
bad47ad2 CZ	578	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	579	if (!pdata)
	580	return -ENOMEM;
2cd64ae3	581
bad47ad2 CZ	582	ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
bad47ad2 CZ	583	rk808->regmap, pdata);
571a4010	584	if (ret < 0)
2cd64ae3 CZ	585	return ret;
2cd64ae3 CZ	586
bad47ad2 CZ	587	platform_set_drvdata(pdev, pdata);
bad47ad2 CZ	588
2cd64ae3 CZ	589	/* Instantiate the regulators */
2cd64ae3 CZ	590	for (i = 0; i < RK808_NUM_REGULATORS; i++) {
571a4010 CZ	591	if (!rk808_reg_matches[i].init_data \|\|
571a4010 CZ	592	!rk808_reg_matches[i].of_node)
2cd64ae3 CZ	593	continue;
2cd64ae3 CZ	594
d76c333e	595	config.dev = &client->dev;
bad47ad2	596	config.driver_data = pdata;
2cd64ae3	597	config.regmap = rk808->regmap;
571a4010 CZ	598	config.of_node = rk808_reg_matches[i].of_node;
571a4010 CZ	599	config.init_data = rk808_reg_matches[i].init_data;
2cd64ae3 CZ	600
	601	rk808_rdev = devm_regulator_register(&pdev->dev,
	602	&rk808_reg[i], &config);
	603	if (IS_ERR(rk808_rdev)) {
d76c333e	604	dev_err(&client->dev,
2cd64ae3 CZ	605	"failed to register %d regulator\n", i);
	606	return PTR_ERR(rk808_rdev);
	607	}
2cd64ae3	608	}
571a4010	609
2cd64ae3 CZ	610	return 0;
	611	}
	612
	613	static struct platform_driver rk808_regulator_driver = {
	614	.probe = rk808_regulator_probe,
	615	.driver = {
	616	.name = "rk808-regulator",
bad47ad2	617	.owner = THIS_MODULE,
2cd64ae3 CZ	618	},
	619	};
	620
	621	module_platform_driver(rk808_regulator_driver);
	622
	623	MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
	624	MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
571a4010	625	MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
2cd64ae3 CZ	626	MODULE_LICENSE("GPL");
2cd64ae3 CZ	627	MODULE_ALIAS("platform:rk808-regulator");