diff options
Diffstat (limited to 'drivers/regulator/max77693.c')
| -rw-r--r-- | drivers/regulator/max77693.c | 173 |
1 files changed, 150 insertions, 23 deletions
diff --git a/drivers/regulator/max77693.c b/drivers/regulator/max77693.c index 38722c8311a5..de730fd3f8a5 100644 --- a/drivers/regulator/max77693.c +++ b/drivers/regulator/max77693.c @@ -1,8 +1,9 @@ /* - * max77693.c - Regulator driver for the Maxim 77693 + * max77693.c - Regulator driver for the Maxim 77693 and 77843 * - * Copyright (C) 2013 Samsung Electronics + * Copyright (C) 2013-2015 Samsung Electronics * Jonghwa Lee <jonghwa3.lee@samsung.com> + * Krzysztof Kozlowski <k.kozlowski.k@gmail.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 @@ -29,38 +30,64 @@ #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/mfd/max77693.h> +#include <linux/mfd/max77693-common.h> #include <linux/mfd/max77693-private.h> +#include <linux/mfd/max77843-private.h> #include <linux/regulator/of_regulator.h> #include <linux/regmap.h> -#define CHGIN_ILIM_STEP_20mA 20000 +/* + * ID for MAX77843 regulators. + * There is no need for such for MAX77693. + */ +enum max77843_regulator_type { + MAX77843_SAFEOUT1 = 0, + MAX77843_SAFEOUT2, + MAX77843_CHARGER, + + MAX77843_NUM, +}; + +/* Register differences between chargers: MAX77693 and MAX77843 */ +struct chg_reg_data { + unsigned int linear_reg; + unsigned int linear_mask; + unsigned int uA_step; + unsigned int min_sel; +}; /* - * CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA + * MAX77693 CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA * 0x00, 0x01, 0x2, 0x03 = 60 mA * 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA + * Actually for MAX77693 the driver manipulates the maximum input current, + * not the fast charge current (output). This should be fixed. + * + * On MAX77843 the calculation formula is the same (except values). + * Fortunately it properly manipulates the fast charge current. */ static int max77693_chg_get_current_limit(struct regulator_dev *rdev) { + const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev); unsigned int chg_min_uA = rdev->constraints->min_uA; unsigned int chg_max_uA = rdev->constraints->max_uA; unsigned int reg, sel; unsigned int val; int ret; - ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, ®); + ret = regmap_read(rdev->regmap, reg_data->linear_reg, ®); if (ret < 0) return ret; - sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK; + sel = reg & reg_data->linear_mask; /* the first four codes for charger current are all 60mA */ - if (sel <= 3) + if (sel <= reg_data->min_sel) sel = 0; else - sel -= 3; + sel -= reg_data->min_sel; - val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel; + val = chg_min_uA + reg_data->uA_step * sel; if (val > chg_max_uA) return -EINVAL; @@ -70,23 +97,43 @@ static int max77693_chg_get_current_limit(struct regulator_dev *rdev) static int max77693_chg_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { + const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev); unsigned int chg_min_uA = rdev->constraints->min_uA; int sel = 0; - while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA) + while (chg_min_uA + reg_data->uA_step * sel < min_uA) sel++; - if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA) + if (chg_min_uA + reg_data->uA_step * sel > max_uA) return -EINVAL; /* the first four codes for charger current are all 60mA */ - sel += 3; + sel += reg_data->min_sel; - return regmap_write(rdev->regmap, - MAX77693_CHG_REG_CHG_CNFG_09, sel); + return regmap_write(rdev->regmap, reg_data->linear_reg, sel); } /* end of CHARGER regulator ops */ +/* Returns regmap suitable for given regulator on chosen device */ +static struct regmap *max77693_get_regmap(enum max77693_types type, + struct max77693_dev *max77693, + int reg_id) +{ + if (type == TYPE_MAX77693) + return max77693->regmap; + + /* Else: TYPE_MAX77843 */ + switch (reg_id) { + case MAX77843_SAFEOUT1: + case MAX77843_SAFEOUT2: + return max77693->regmap; + case MAX77843_CHARGER: + return max77693->regmap_chg; + default: + return max77693->regmap; + } +} + static const unsigned int max77693_safeout_table[] = { 4850000, 4900000, @@ -111,7 +158,7 @@ static struct regulator_ops max77693_charger_ops = { .set_current_limit = max77693_chg_set_current_limit, }; -#define regulator_desc_esafeout(_num) { \ +#define max77693_regulator_desc_esafeout(_num) { \ .name = "ESAFEOUT"#_num, \ .id = MAX77693_ESAFEOUT##_num, \ .of_match = of_match_ptr("ESAFEOUT"#_num), \ @@ -127,9 +174,9 @@ static struct regulator_ops max77693_charger_ops = { .enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \ } -static const struct regulator_desc regulators[] = { - regulator_desc_esafeout(1), - regulator_desc_esafeout(2), +static const struct regulator_desc max77693_supported_regulators[] = { + max77693_regulator_desc_esafeout(1), + max77693_regulator_desc_esafeout(2), { .name = "CHARGER", .id = MAX77693_CHARGER, @@ -145,18 +192,86 @@ static const struct regulator_desc regulators[] = { }, }; +static const struct chg_reg_data max77693_chg_reg_data = { + .linear_reg = MAX77693_CHG_REG_CHG_CNFG_09, + .linear_mask = CHG_CNFG_09_CHGIN_ILIM_MASK, + .uA_step = 20000, + .min_sel = 3, +}; + +#define max77843_regulator_desc_esafeout(num) { \ + .name = "SAFEOUT" # num, \ + .id = MAX77843_SAFEOUT ## num, \ + .ops = &max77693_safeout_ops, \ + .of_match = of_match_ptr("SAFEOUT" # num), \ + .regulators_node = of_match_ptr("regulators"), \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .n_voltages = ARRAY_SIZE(max77693_safeout_table), \ + .volt_table = max77693_safeout_table, \ + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \ + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT ## num, \ + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \ + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT ## num ## _MASK, \ +} + +static const struct regulator_desc max77843_supported_regulators[] = { + [MAX77843_SAFEOUT1] = max77843_regulator_desc_esafeout(1), + [MAX77843_SAFEOUT2] = max77843_regulator_desc_esafeout(2), + [MAX77843_CHARGER] = { + .name = "CHARGER", + .id = MAX77843_CHARGER, + .ops = &max77693_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, + .enable_val = MAX77843_CHG_MASK, + }, +}; + +static const struct chg_reg_data max77843_chg_reg_data = { + .linear_reg = MAX77843_CHG_REG_CHG_CNFG_02, + .linear_mask = MAX77843_CHG_FAST_CHG_CURRENT_MASK, + .uA_step = MAX77843_CHG_FAST_CHG_CURRENT_STEP, + .min_sel = 2, +}; + static int max77693_pmic_probe(struct platform_device *pdev) { + enum max77693_types type = platform_get_device_id(pdev)->driver_data; struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent); + const struct regulator_desc *regulators; + unsigned int regulators_size; int i; struct regulator_config config = { }; config.dev = iodev->dev; - config.regmap = iodev->regmap; - for (i = 0; i < ARRAY_SIZE(regulators); i++) { + switch (type) { + case TYPE_MAX77693: + regulators = max77693_supported_regulators; + regulators_size = ARRAY_SIZE(max77693_supported_regulators); + config.driver_data = (void *)&max77693_chg_reg_data; + break; + case TYPE_MAX77843: + regulators = max77843_supported_regulators; + regulators_size = ARRAY_SIZE(max77843_supported_regulators); + config.driver_data = (void *)&max77843_chg_reg_data; + break; + default: + dev_err(&pdev->dev, "Unsupported device type: %u\n", type); + return -ENODEV; + } + + for (i = 0; i < regulators_size; i++) { struct regulator_dev *rdev; + config.regmap = max77693_get_regmap(type, iodev, + regulators[i].id); + rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config); if (IS_ERR(rdev)) { @@ -170,7 +285,8 @@ static int max77693_pmic_probe(struct platform_device *pdev) } static const struct platform_device_id max77693_pmic_id[] = { - {"max77693-pmic", 0}, + { "max77693-pmic", TYPE_MAX77693 }, + { "max77843-regulator", TYPE_MAX77843 }, {}, }; @@ -184,8 +300,19 @@ static struct platform_driver max77693_pmic_driver = { .id_table = max77693_pmic_id, }; -module_platform_driver(max77693_pmic_driver); +static int __init max77693_pmic_init(void) +{ + return platform_driver_register(&max77693_pmic_driver); +} +subsys_initcall(max77693_pmic_init); + +static void __exit max77693_pmic_cleanup(void) +{ + platform_driver_unregister(&max77693_pmic_driver); +} +module_exit(max77693_pmic_cleanup); -MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver"); +MODULE_DESCRIPTION("MAXIM 77693/77843 regulator driver"); MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>"); +MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski.k@gmail.com>"); MODULE_LICENSE("GPL"); |