/*
* 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 i2c_client *client,
struct rk808_board *pdata)
{
struct device_node *np, *reg_np;
int i, ret;
np = client->dev.of_node;
if (!np) {
dev_err(&client->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(&client->dev, reg_np, rk808_reg_matches,
RK808_NUM_REGULATORS);
if (ret < 0) {
dev_err(&client->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 i2c_client *client = rk808->i2c;
struct rk808_board *pdata = dev_get_platdata(&client->dev);
struct regulator_config config = {};
struct regulator_dev *rk808_rdev;
struct regulator_init_data *reg_data;
int i = 0;
int ret = 0;
if (!pdata) {
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
}
ret = rk808_regulator_dts(client, pdata);
if (ret)
return ret;
/* Instantiate the regulators */
for (i = 0; i < RK808_NUM_REGULATORS; i++) {
reg_data = pdata->rk808_init_data[i];
if (!reg_data)
continue;
config.dev = &client->dev;
config.driver_data = rk808;
config.regmap = rk808->regmap;
if (client->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(&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<zhanqging@rock-chips.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:rk808-regulator");
