+++ /dev/null
-/*
- * 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");
Code Review / kvmfornfv.git / blobdiff