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Commit 2cd64ae3 authored by Chris Zhong's avatar Chris Zhong Committed by Mark Brown
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regulator: RK808: Add regulator driver for RK808 



The regulator module consists of 4 DCDCs, 8 LDOs and 2 switches.
The output voltages are configurable and are meant to supply power
to the main processor and other components

Signed-off-by: default avatarChris Zhong <zyw@rock-chips.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 7d1311b9

drivers/regulator/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -459,6 +459,16 @@ config REGULATOR_RC5T583 
	  through regulator interface. The device supports multiple DCDC/LDO

	  outputs which can be controlled by i2c communication.



config REGULATOR_RK808

	tristate "Rockchip RK808 Power regulators"

	depends on MFD_RK808

	help

	  Select this option to enable the power regulator of ROCKCHIP

	  PMIC RK808.

	  This driver supports the control of different power rails of device

	  through regulator interface. The device supports multiple DCDC/LDO

	  outputs which can be controlled by i2c communication.



config REGULATOR_S2MPA01

	tristate "Samsung S2MPA01 voltage regulator"

	depends on MFD_SEC_CORE

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o 
obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o

obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o

obj-$(CONFIG_REGULATOR_RC5T583)  += rc5t583-regulator.o

obj-$(CONFIG_REGULATOR_RK808)   += rk808-regulator.o

obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o

obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o

obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o

drivers/regulator/rk808-regulator.c

0 → 100644
+410 −0
Original line number Diff line number Diff line 
/*

 * 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/module.h>

#include <linux/init.h>

#include <linux/i2c.h>

#include <linux/err.h>

#include <linux/platform_device.h>

#include <linux/mfd/rk808.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>

#include <linux/regmap.h>

#include <linux/slab.h>

/*

 * Field Definitions.

 */

#define RK808_BUCK_VSEL_MASK	0x3f

#define RK808_BUCK4_VSEL_MASK	0xf

#define RK808_LDO_VSEL_MASK	0x1f



static const int buck_set_vol_base_addr[] = {

	RK808_BUCK1_ON_VSEL_REG,

	RK808_BUCK2_ON_VSEL_REG,

	RK808_BUCK3_CONFIG_REG,

	RK808_BUCK4_ON_VSEL_REG,

};



static const int buck_contr_base_addr[] = {

	RK808_BUCK1_CONFIG_REG,

	RK808_BUCK2_CONFIG_REG,

	RK808_BUCK3_CONFIG_REG,

	RK808_BUCK4_CONFIG_REG,

};



#define rk808_BUCK_SET_VOL_REG(x) (buck_set_vol_base_addr[x])

#define rk808_BUCK_CONTR_REG(x) (buck_contr_base_addr[x])

#define rk808_LDO_SET_VOL_REG(x) (ldo_set_vol_base_addr[x])



static const int ldo_set_vol_base_addr[] = {

	RK808_LDO1_ON_VSEL_REG,

	RK808_LDO2_ON_VSEL_REG,

	RK808_LDO3_ON_VSEL_REG,

	RK808_LDO4_ON_VSEL_REG,

	RK808_LDO5_ON_VSEL_REG,

	RK808_LDO6_ON_VSEL_REG,

	RK808_LDO7_ON_VSEL_REG,

	RK808_LDO8_ON_VSEL_REG,

};



/*

 * rk808 voltage number

 */

static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {

	REGULATOR_LINEAR_RANGE(700000, 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 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,

};



static struct regulator_ops rk808_switch_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

};



static const struct regulator_desc rk808_reg[] = {

	{

		.name = "DCDC_REG1",

		.id = RK808_ID_DCDC1,

		.ops = &rk808_reg_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",

		.id = RK808_ID_DCDC2,

		.ops = &rk808_reg_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",

		.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",

		.id = RK808_ID_DCDC4,

		.ops = &rk808_reg_ops,

		.type = REGULATOR_VOLTAGE,

		.n_voltages = 17,

		.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",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "LDO_REG2",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "LDO_REG3",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "LDO_REG4",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "LDO_REG5",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "LDO_REG6",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "LDO_REG7",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "LDO_REG8",

		.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),

		.owner = THIS_MODULE,

	}, {

		.name = "SWITCH_REG1",

		.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",

		.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_dts(struct rk808 *rk808)

{

	struct rk808_board *pdata = rk808->pdata;

	struct device_node *np, *reg_np;

	int i, ret;



	np = rk808->dev->of_node;

	if (!np) {

		dev_err(rk808->dev, "could not find pmic sub-node\n");

		return -ENXIO;

	}



	reg_np = of_get_child_by_name(np, "regulators");

	if (!reg_np)

		return -ENXIO;



	ret = of_regulator_match(rk808->dev, reg_np, rk808_reg_matches,

				 RK808_NUM_REGULATORS);

	if (ret  < 0) {

		dev_err(rk808->dev,

			"failed to parse regulator data: %d\n", ret);

		return ret;

	}



	for (i = 0; i < RK808_NUM_REGULATORS; i++) {

		if (!rk808_reg_matches[i].init_data ||

		    !rk808_reg_matches[i].of_node)

			continue;



		pdata->rk808_init_data[i] = rk808_reg_matches[i].init_data;

		pdata->of_node[i] = rk808_reg_matches[i].of_node;

	}



	return 0;

}



static int rk808_regulator_probe(struct platform_device *pdev)

{

	struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);

	struct rk808_board *pdata;

	struct regulator_config config;

	struct regulator_dev *rk808_rdev;

	struct regulator_init_data *reg_data;

	int i = 0;

	int ret = 0;



	dev_dbg(rk808->dev, "%s\n", __func__);



	if (!rk808) {

		dev_err(rk808->dev, "%s no rk808\n", __func__);

		return -ENODEV;

	}



	pdata = rk808->pdata;

	if (!pdata) {

		dev_warn(rk808->dev, "%s no pdata, create it\n", __func__);

		pdata = devm_kzalloc(rk808->dev, sizeof(*pdata), GFP_KERNEL);

		if (!pdata)

			return -ENOMEM;

	}



	ret = rk808_regulator_dts(rk808);

	if (ret)

		return ret;



	rk808->num_regulators = RK808_NUM_REGULATORS;

	rk808->rdev = devm_kzalloc(&pdev->dev, RK808_NUM_REGULATORS *

				   sizeof(struct regulator_dev *), GFP_KERNEL);

	if (!rk808->rdev)

		return -ENOMEM;



	/* Instantiate the regulators */

	for (i = 0; i < RK808_NUM_REGULATORS; i++) {

		reg_data = pdata->rk808_init_data[i];

		if (!reg_data)

			continue;



		config.dev = rk808->dev;

		config.driver_data = rk808;

		config.regmap = rk808->regmap;



		if (rk808->dev->of_node)

			config.of_node = pdata->of_node[i];



		reg_data->supply_regulator = rk808_reg[i].name;

		config.init_data = reg_data;



		rk808_rdev = devm_regulator_register(&pdev->dev,

						     &rk808_reg[i], &config);

		if (IS_ERR(rk808_rdev)) {

			dev_err(rk808->dev,

				"failed to register %d regulator\n", i);

			return PTR_ERR(rk808_rdev);

		}

		rk808->rdev[i] = 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<zhanqging@rock-chips.com>");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:rk808-regulator");