mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Bhumika Goyal](/assets/img/avatar_default.png)
Declare regulator_ops structure as const as it is only stored in the ops field of a regulator_desc structure. This field is of type const, so regulator_ops structures having this property can be made const too. File size before: drivers/regulator/max14577-regulator.o text data bss dec hex filename 2646 976 0 3622 e26 regulator/max14577-regulator.o File size after: drivers/regulator/max14577-regulator.o text data bss dec hex filename 3414 192 0 3606 e16 regulator/max14577-regulator.o Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
337 lines
9.9 KiB
C
337 lines
9.9 KiB
C
/*
|
|
* max14577.c - Regulator driver for the Maxim 14577/77836
|
|
*
|
|
* Copyright (C) 2013,2014 Samsung Electronics
|
|
* Krzysztof Kozlowski <krzk@kernel.org>
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that 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/platform_device.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/mfd/max14577.h>
|
|
#include <linux/mfd/max14577-private.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
|
|
static int max14577_reg_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
int rid = rdev_get_id(rdev);
|
|
struct regmap *rmap = rdev->regmap;
|
|
u8 reg_data;
|
|
|
|
switch (rid) {
|
|
case MAX14577_CHARGER:
|
|
max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, ®_data);
|
|
if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
|
|
return 0;
|
|
max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, ®_data);
|
|
if ((reg_data & STATUS3_CGMBC_MASK) == 0)
|
|
return 0;
|
|
/* MBCHOSTEN and CGMBC are on */
|
|
return 1;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int max14577_reg_get_current_limit(struct regulator_dev *rdev)
|
|
{
|
|
u8 reg_data;
|
|
struct regmap *rmap = rdev->regmap;
|
|
struct max14577 *max14577 = rdev_get_drvdata(rdev);
|
|
const struct maxim_charger_current *limits =
|
|
&maxim_charger_currents[max14577->dev_type];
|
|
|
|
if (rdev_get_id(rdev) != MAX14577_CHARGER)
|
|
return -EINVAL;
|
|
|
|
max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL4, ®_data);
|
|
|
|
if ((reg_data & CHGCTRL4_MBCICHWRCL_MASK) == 0)
|
|
return limits->min;
|
|
|
|
reg_data = ((reg_data & CHGCTRL4_MBCICHWRCH_MASK) >>
|
|
CHGCTRL4_MBCICHWRCH_SHIFT);
|
|
return limits->high_start + reg_data * limits->high_step;
|
|
}
|
|
|
|
static int max14577_reg_set_current_limit(struct regulator_dev *rdev,
|
|
int min_uA, int max_uA)
|
|
{
|
|
u8 reg_data;
|
|
int ret;
|
|
struct max14577 *max14577 = rdev_get_drvdata(rdev);
|
|
const struct maxim_charger_current *limits =
|
|
&maxim_charger_currents[max14577->dev_type];
|
|
|
|
if (rdev_get_id(rdev) != MAX14577_CHARGER)
|
|
return -EINVAL;
|
|
|
|
ret = maxim_charger_calc_reg_current(limits, min_uA, max_uA, ®_data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return max14577_update_reg(rdev->regmap, MAX14577_CHG_REG_CHG_CTRL4,
|
|
CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK,
|
|
reg_data);
|
|
}
|
|
|
|
static const struct regulator_ops max14577_safeout_ops = {
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
};
|
|
|
|
static const struct regulator_ops max14577_charger_ops = {
|
|
.is_enabled = max14577_reg_is_enabled,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.get_current_limit = max14577_reg_get_current_limit,
|
|
.set_current_limit = max14577_reg_set_current_limit,
|
|
};
|
|
|
|
#define MAX14577_SAFEOUT_REG { \
|
|
.name = "SAFEOUT", \
|
|
.of_match = of_match_ptr("SAFEOUT"), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.id = MAX14577_SAFEOUT, \
|
|
.ops = &max14577_safeout_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
.n_voltages = 1, \
|
|
.min_uV = MAX14577_REGULATOR_SAFEOUT_VOLTAGE, \
|
|
.enable_reg = MAX14577_REG_CONTROL2, \
|
|
.enable_mask = CTRL2_SFOUTORD_MASK, \
|
|
}
|
|
#define MAX14577_CHARGER_REG { \
|
|
.name = "CHARGER", \
|
|
.of_match = of_match_ptr("CHARGER"), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.id = MAX14577_CHARGER, \
|
|
.ops = &max14577_charger_ops, \
|
|
.type = REGULATOR_CURRENT, \
|
|
.owner = THIS_MODULE, \
|
|
.enable_reg = MAX14577_CHG_REG_CHG_CTRL2, \
|
|
.enable_mask = CHGCTRL2_MBCHOSTEN_MASK, \
|
|
}
|
|
|
|
static const struct regulator_desc max14577_supported_regulators[] = {
|
|
[MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
|
|
[MAX14577_CHARGER] = MAX14577_CHARGER_REG,
|
|
};
|
|
|
|
static const struct regulator_ops max77836_ldo_ops = {
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
.map_voltage = regulator_map_voltage_linear,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
/* TODO: add .set_suspend_mode */
|
|
};
|
|
|
|
#define MAX77836_LDO_REG(num) { \
|
|
.name = "LDO" # num, \
|
|
.of_match = of_match_ptr("LDO" # num), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.id = MAX77836_LDO ## num, \
|
|
.ops = &max77836_ldo_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
.n_voltages = MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, \
|
|
.min_uV = MAX77836_REGULATOR_LDO_VOLTAGE_MIN, \
|
|
.uV_step = MAX77836_REGULATOR_LDO_VOLTAGE_STEP, \
|
|
.enable_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
|
|
.enable_mask = MAX77836_CNFG1_LDO_PWRMD_MASK, \
|
|
.vsel_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
|
|
.vsel_mask = MAX77836_CNFG1_LDO_TV_MASK, \
|
|
}
|
|
|
|
static const struct regulator_desc max77836_supported_regulators[] = {
|
|
[MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
|
|
[MAX14577_CHARGER] = MAX14577_CHARGER_REG,
|
|
[MAX77836_LDO1] = MAX77836_LDO_REG(1),
|
|
[MAX77836_LDO2] = MAX77836_LDO_REG(2),
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_regulator_match max14577_regulator_matches[] = {
|
|
{ .name = "SAFEOUT", },
|
|
{ .name = "CHARGER", },
|
|
};
|
|
|
|
static struct of_regulator_match max77836_regulator_matches[] = {
|
|
{ .name = "SAFEOUT", },
|
|
{ .name = "CHARGER", },
|
|
{ .name = "LDO1", },
|
|
{ .name = "LDO2", },
|
|
};
|
|
|
|
static inline struct regulator_init_data *match_init_data(int index,
|
|
enum maxim_device_type dev_type)
|
|
{
|
|
switch (dev_type) {
|
|
case MAXIM_DEVICE_TYPE_MAX77836:
|
|
return max77836_regulator_matches[index].init_data;
|
|
|
|
case MAXIM_DEVICE_TYPE_MAX14577:
|
|
default:
|
|
return max14577_regulator_matches[index].init_data;
|
|
}
|
|
}
|
|
|
|
static inline struct device_node *match_of_node(int index,
|
|
enum maxim_device_type dev_type)
|
|
{
|
|
switch (dev_type) {
|
|
case MAXIM_DEVICE_TYPE_MAX77836:
|
|
return max77836_regulator_matches[index].of_node;
|
|
|
|
case MAXIM_DEVICE_TYPE_MAX14577:
|
|
default:
|
|
return max14577_regulator_matches[index].of_node;
|
|
}
|
|
}
|
|
#else /* CONFIG_OF */
|
|
static inline struct regulator_init_data *match_init_data(int index,
|
|
enum maxim_device_type dev_type)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct device_node *match_of_node(int index,
|
|
enum maxim_device_type dev_type)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif /* CONFIG_OF */
|
|
|
|
/**
|
|
* Registers for regulators of max77836 use different I2C slave addresses so
|
|
* different regmaps must be used for them.
|
|
*
|
|
* Returns proper regmap for accessing regulator passed by id.
|
|
*/
|
|
static struct regmap *max14577_get_regmap(struct max14577 *max14577,
|
|
int reg_id)
|
|
{
|
|
switch (max14577->dev_type) {
|
|
case MAXIM_DEVICE_TYPE_MAX77836:
|
|
switch (reg_id) {
|
|
case MAX77836_SAFEOUT ... MAX77836_CHARGER:
|
|
return max14577->regmap;
|
|
default:
|
|
/* MAX77836_LDO1 ... MAX77836_LDO2 */
|
|
return max14577->regmap_pmic;
|
|
}
|
|
|
|
case MAXIM_DEVICE_TYPE_MAX14577:
|
|
default:
|
|
return max14577->regmap;
|
|
}
|
|
}
|
|
|
|
static int max14577_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
|
|
struct max14577_platform_data *pdata = dev_get_platdata(max14577->dev);
|
|
int i, ret = 0;
|
|
struct regulator_config config = {};
|
|
const struct regulator_desc *supported_regulators;
|
|
unsigned int supported_regulators_size;
|
|
enum maxim_device_type dev_type = max14577->dev_type;
|
|
|
|
switch (dev_type) {
|
|
case MAXIM_DEVICE_TYPE_MAX77836:
|
|
supported_regulators = max77836_supported_regulators;
|
|
supported_regulators_size = ARRAY_SIZE(max77836_supported_regulators);
|
|
break;
|
|
case MAXIM_DEVICE_TYPE_MAX14577:
|
|
default:
|
|
supported_regulators = max14577_supported_regulators;
|
|
supported_regulators_size = ARRAY_SIZE(max14577_supported_regulators);
|
|
}
|
|
|
|
config.dev = max14577->dev;
|
|
config.driver_data = max14577;
|
|
|
|
for (i = 0; i < supported_regulators_size; i++) {
|
|
struct regulator_dev *regulator;
|
|
/*
|
|
* Index of supported_regulators[] is also the id and must
|
|
* match index of pdata->regulators[].
|
|
*/
|
|
if (pdata && pdata->regulators) {
|
|
config.init_data = pdata->regulators[i].initdata;
|
|
config.of_node = pdata->regulators[i].of_node;
|
|
} else {
|
|
config.init_data = match_init_data(i, dev_type);
|
|
config.of_node = match_of_node(i, dev_type);
|
|
}
|
|
config.regmap = max14577_get_regmap(max14577,
|
|
supported_regulators[i].id);
|
|
|
|
regulator = devm_regulator_register(&pdev->dev,
|
|
&supported_regulators[i], &config);
|
|
if (IS_ERR(regulator)) {
|
|
ret = PTR_ERR(regulator);
|
|
dev_err(&pdev->dev,
|
|
"Regulator init failed for %d/%s with error: %d\n",
|
|
i, supported_regulators[i].name, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct platform_device_id max14577_regulator_id[] = {
|
|
{ "max14577-regulator", MAXIM_DEVICE_TYPE_MAX14577, },
|
|
{ "max77836-regulator", MAXIM_DEVICE_TYPE_MAX77836, },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, max14577_regulator_id);
|
|
|
|
static struct platform_driver max14577_regulator_driver = {
|
|
.driver = {
|
|
.name = "max14577-regulator",
|
|
},
|
|
.probe = max14577_regulator_probe,
|
|
.id_table = max14577_regulator_id,
|
|
};
|
|
|
|
static int __init max14577_regulator_init(void)
|
|
{
|
|
BUILD_BUG_ON(ARRAY_SIZE(max14577_supported_regulators) != MAX14577_REGULATOR_NUM);
|
|
BUILD_BUG_ON(ARRAY_SIZE(max77836_supported_regulators) != MAX77836_REGULATOR_NUM);
|
|
|
|
BUILD_BUG_ON(MAX77836_REGULATOR_LDO_VOLTAGE_MIN +
|
|
(MAX77836_REGULATOR_LDO_VOLTAGE_STEP *
|
|
(MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM - 1)) !=
|
|
MAX77836_REGULATOR_LDO_VOLTAGE_MAX);
|
|
|
|
return platform_driver_register(&max14577_regulator_driver);
|
|
}
|
|
subsys_initcall(max14577_regulator_init);
|
|
|
|
static void __exit max14577_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&max14577_regulator_driver);
|
|
}
|
|
module_exit(max14577_regulator_exit);
|
|
|
|
MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
|
|
MODULE_DESCRIPTION("Maxim 14577/77836 regulator driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:max14577-regulator");
|