mirror of https://gitee.com/openkylin/linux.git
228 lines
6.2 KiB
C
228 lines
6.2 KiB
C
/*
|
|
* max77843.c - Regulator driver for the Maxim MAX77843
|
|
*
|
|
* Copyright (C) 2015 Samsung Electronics
|
|
* Author: Jaewon Kim <jaewon02.kim@samsung.com>
|
|
* Author: Beomho Seo <beomho.seo@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/mfd/max77843-private.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
|
|
enum max77843_regulator_type {
|
|
MAX77843_SAFEOUT1 = 0,
|
|
MAX77843_SAFEOUT2,
|
|
MAX77843_CHARGER,
|
|
|
|
MAX77843_NUM,
|
|
};
|
|
|
|
static const unsigned int max77843_safeout_voltage_table[] = {
|
|
4850000,
|
|
4900000,
|
|
4950000,
|
|
3300000,
|
|
};
|
|
|
|
static int max77843_reg_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct regmap *regmap = rdev->regmap;
|
|
int ret;
|
|
unsigned int reg;
|
|
|
|
ret = regmap_read(regmap, rdev->desc->enable_reg, ®);
|
|
if (ret) {
|
|
dev_err(&rdev->dev, "Fialed to read charger register\n");
|
|
return ret;
|
|
}
|
|
|
|
return (reg & rdev->desc->enable_mask) == rdev->desc->enable_mask;
|
|
}
|
|
|
|
static int max77843_reg_get_current_limit(struct regulator_dev *rdev)
|
|
{
|
|
struct regmap *regmap = rdev->regmap;
|
|
unsigned int chg_min_uA = rdev->constraints->min_uA;
|
|
unsigned int chg_max_uA = rdev->constraints->max_uA;
|
|
unsigned int val;
|
|
int ret;
|
|
unsigned int reg, sel;
|
|
|
|
ret = regmap_read(regmap, MAX77843_CHG_REG_CHG_CNFG_02, ®);
|
|
if (ret) {
|
|
dev_err(&rdev->dev, "Failed to read charger register\n");
|
|
return ret;
|
|
}
|
|
|
|
sel = reg & MAX77843_CHG_FAST_CHG_CURRENT_MASK;
|
|
|
|
if (sel < 0x03)
|
|
sel = 0;
|
|
else
|
|
sel -= 2;
|
|
|
|
val = chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel;
|
|
if (val > chg_max_uA)
|
|
return -EINVAL;
|
|
|
|
return val;
|
|
}
|
|
|
|
static int max77843_reg_set_current_limit(struct regulator_dev *rdev,
|
|
int min_uA, int max_uA)
|
|
{
|
|
struct regmap *regmap = rdev->regmap;
|
|
unsigned int chg_min_uA = rdev->constraints->min_uA;
|
|
int sel = 0;
|
|
|
|
while (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel < min_uA)
|
|
sel++;
|
|
|
|
if (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel > max_uA)
|
|
return -EINVAL;
|
|
|
|
sel += 2;
|
|
|
|
return regmap_write(regmap, MAX77843_CHG_REG_CHG_CNFG_02, sel);
|
|
}
|
|
|
|
static struct regulator_ops max77843_charger_ops = {
|
|
.is_enabled = max77843_reg_is_enabled,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.get_current_limit = max77843_reg_get_current_limit,
|
|
.set_current_limit = max77843_reg_set_current_limit,
|
|
};
|
|
|
|
static struct regulator_ops max77843_regulator_ops = {
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.list_voltage = regulator_list_voltage_table,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
};
|
|
|
|
static const struct regulator_desc max77843_supported_regulators[] = {
|
|
[MAX77843_SAFEOUT1] = {
|
|
.name = "SAFEOUT1",
|
|
.id = MAX77843_SAFEOUT1,
|
|
.ops = &max77843_regulator_ops,
|
|
.of_match = of_match_ptr("SAFEOUT1"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
.n_voltages = ARRAY_SIZE(max77843_safeout_voltage_table),
|
|
.volt_table = max77843_safeout_voltage_table,
|
|
.enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL,
|
|
.enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT1,
|
|
.vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL,
|
|
.vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT1_MASK,
|
|
},
|
|
[MAX77843_SAFEOUT2] = {
|
|
.name = "SAFEOUT2",
|
|
.id = MAX77843_SAFEOUT2,
|
|
.ops = &max77843_regulator_ops,
|
|
.of_match = of_match_ptr("SAFEOUT2"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
.n_voltages = ARRAY_SIZE(max77843_safeout_voltage_table),
|
|
.volt_table = max77843_safeout_voltage_table,
|
|
.enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL,
|
|
.enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT2,
|
|
.vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL,
|
|
.vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT2_MASK,
|
|
},
|
|
[MAX77843_CHARGER] = {
|
|
.name = "CHARGER",
|
|
.id = MAX77843_CHARGER,
|
|
.ops = &max77843_charger_ops,
|
|
.of_match = of_match_ptr("CHARGER"),
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.type = REGULATOR_CURRENT,
|
|
.owner = THIS_MODULE,
|
|
.enable_reg = MAX77843_CHG_REG_CHG_CNFG_00,
|
|
.enable_mask = MAX77843_CHG_MASK,
|
|
},
|
|
};
|
|
|
|
static struct regmap *max77843_get_regmap(struct max77843 *max77843, int reg_id)
|
|
{
|
|
switch (reg_id) {
|
|
case MAX77843_SAFEOUT1:
|
|
case MAX77843_SAFEOUT2:
|
|
return max77843->regmap;
|
|
case MAX77843_CHARGER:
|
|
return max77843->regmap_chg;
|
|
default:
|
|
return max77843->regmap;
|
|
}
|
|
}
|
|
|
|
static int max77843_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent);
|
|
struct regulator_config config = {};
|
|
int i;
|
|
|
|
config.dev = max77843->dev;
|
|
config.driver_data = max77843;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(max77843_supported_regulators); i++) {
|
|
struct regulator_dev *regulator;
|
|
|
|
config.regmap = max77843_get_regmap(max77843,
|
|
max77843_supported_regulators[i].id);
|
|
|
|
regulator = devm_regulator_register(&pdev->dev,
|
|
&max77843_supported_regulators[i], &config);
|
|
if (IS_ERR(regulator)) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to regiser regulator-%d\n", i);
|
|
return PTR_ERR(regulator);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max77843_regulator_id[] = {
|
|
{ "max77843-regulator", },
|
|
{ /* sentinel */ },
|
|
};
|
|
|
|
static struct platform_driver max77843_regulator_driver = {
|
|
.driver = {
|
|
.name = "max77843-regulator",
|
|
},
|
|
.probe = max77843_regulator_probe,
|
|
.id_table = max77843_regulator_id,
|
|
};
|
|
|
|
static int __init max77843_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&max77843_regulator_driver);
|
|
}
|
|
subsys_initcall(max77843_regulator_init);
|
|
|
|
static void __exit max77843_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&max77843_regulator_driver);
|
|
}
|
|
module_exit(max77843_regulator_exit);
|
|
|
|
MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
|
|
MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
|
|
MODULE_DESCRIPTION("Maxim MAX77843 regulator driver");
|
|
MODULE_LICENSE("GPL");
|