linux/drivers/regulator/max14577-regulator.c
Marek Szyprowski 0da6736ecd
regulator: max14577: Add proper module aliases strings
Add proper modalias structures to let this driver load automatically if
compiled as module, because max14577 MFD driver creates MFD cells with
such compatible strings.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210112139.5370-1-m.szyprowski@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-12-10 14:28:38 +00:00

274 lines
8.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
//
// max14577.c - Regulator driver for the Maxim 14577/77836
//
// Copyright (C) 2013,2014 Samsung Electronics
// Krzysztof Kozlowski <krzk@kernel.org>
#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, &reg_data);
if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
return 0;
max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_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, &reg_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, &reg_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),
};
/*
* 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;
}
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");
MODULE_ALIAS("platform:max77836-regulator");