15e9384c7SKrzysztof Kozlowski // SPDX-License-Identifier: GPL-2.0+ 25e9384c7SKrzysztof Kozlowski // 35e9384c7SKrzysztof Kozlowski // max14577.c - Regulator driver for the Maxim 14577/77836 45e9384c7SKrzysztof Kozlowski // 55e9384c7SKrzysztof Kozlowski // Copyright (C) 2013,2014 Samsung Electronics 65e9384c7SKrzysztof Kozlowski // Krzysztof Kozlowski <krzk@kernel.org> 786cf635aSJavier Martinez Canillas 886cf635aSJavier Martinez Canillas #include <linux/module.h> 986cf635aSJavier Martinez Canillas #include <linux/platform_device.h> 1086cf635aSJavier Martinez Canillas #include <linux/regulator/driver.h> 1186cf635aSJavier Martinez Canillas #include <linux/mfd/max14577.h> 1286cf635aSJavier Martinez Canillas #include <linux/mfd/max14577-private.h> 1386cf635aSJavier Martinez Canillas #include <linux/regulator/of_regulator.h> 1486cf635aSJavier Martinez Canillas 1586cf635aSJavier Martinez Canillas static int max14577_reg_is_enabled(struct regulator_dev *rdev) 1686cf635aSJavier Martinez Canillas { 1786cf635aSJavier Martinez Canillas int rid = rdev_get_id(rdev); 1886cf635aSJavier Martinez Canillas struct regmap *rmap = rdev->regmap; 1986cf635aSJavier Martinez Canillas u8 reg_data; 2086cf635aSJavier Martinez Canillas 2186cf635aSJavier Martinez Canillas switch (rid) { 2286cf635aSJavier Martinez Canillas case MAX14577_CHARGER: 2386cf635aSJavier Martinez Canillas max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, ®_data); 2486cf635aSJavier Martinez Canillas if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) 2586cf635aSJavier Martinez Canillas return 0; 2686cf635aSJavier Martinez Canillas max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, ®_data); 2786cf635aSJavier Martinez Canillas if ((reg_data & STATUS3_CGMBC_MASK) == 0) 2886cf635aSJavier Martinez Canillas return 0; 2986cf635aSJavier Martinez Canillas /* MBCHOSTEN and CGMBC are on */ 3086cf635aSJavier Martinez Canillas return 1; 3186cf635aSJavier Martinez Canillas default: 3286cf635aSJavier Martinez Canillas return -EINVAL; 3386cf635aSJavier Martinez Canillas } 3486cf635aSJavier Martinez Canillas } 3586cf635aSJavier Martinez Canillas 3686cf635aSJavier Martinez Canillas static int max14577_reg_get_current_limit(struct regulator_dev *rdev) 3786cf635aSJavier Martinez Canillas { 3886cf635aSJavier Martinez Canillas u8 reg_data; 3986cf635aSJavier Martinez Canillas struct regmap *rmap = rdev->regmap; 4086cf635aSJavier Martinez Canillas struct max14577 *max14577 = rdev_get_drvdata(rdev); 4186cf635aSJavier Martinez Canillas const struct maxim_charger_current *limits = 4286cf635aSJavier Martinez Canillas &maxim_charger_currents[max14577->dev_type]; 4386cf635aSJavier Martinez Canillas 4486cf635aSJavier Martinez Canillas if (rdev_get_id(rdev) != MAX14577_CHARGER) 4586cf635aSJavier Martinez Canillas return -EINVAL; 4686cf635aSJavier Martinez Canillas 4786cf635aSJavier Martinez Canillas max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL4, ®_data); 4886cf635aSJavier Martinez Canillas 4986cf635aSJavier Martinez Canillas if ((reg_data & CHGCTRL4_MBCICHWRCL_MASK) == 0) 5086cf635aSJavier Martinez Canillas return limits->min; 5186cf635aSJavier Martinez Canillas 5286cf635aSJavier Martinez Canillas reg_data = ((reg_data & CHGCTRL4_MBCICHWRCH_MASK) >> 5386cf635aSJavier Martinez Canillas CHGCTRL4_MBCICHWRCH_SHIFT); 5486cf635aSJavier Martinez Canillas return limits->high_start + reg_data * limits->high_step; 5586cf635aSJavier Martinez Canillas } 5686cf635aSJavier Martinez Canillas 5786cf635aSJavier Martinez Canillas static int max14577_reg_set_current_limit(struct regulator_dev *rdev, 5886cf635aSJavier Martinez Canillas int min_uA, int max_uA) 5986cf635aSJavier Martinez Canillas { 6086cf635aSJavier Martinez Canillas u8 reg_data; 6186cf635aSJavier Martinez Canillas int ret; 6286cf635aSJavier Martinez Canillas struct max14577 *max14577 = rdev_get_drvdata(rdev); 6386cf635aSJavier Martinez Canillas const struct maxim_charger_current *limits = 6486cf635aSJavier Martinez Canillas &maxim_charger_currents[max14577->dev_type]; 6586cf635aSJavier Martinez Canillas 6686cf635aSJavier Martinez Canillas if (rdev_get_id(rdev) != MAX14577_CHARGER) 6786cf635aSJavier Martinez Canillas return -EINVAL; 6886cf635aSJavier Martinez Canillas 6986cf635aSJavier Martinez Canillas ret = maxim_charger_calc_reg_current(limits, min_uA, max_uA, ®_data); 7086cf635aSJavier Martinez Canillas if (ret) 7186cf635aSJavier Martinez Canillas return ret; 7286cf635aSJavier Martinez Canillas 7386cf635aSJavier Martinez Canillas return max14577_update_reg(rdev->regmap, MAX14577_CHG_REG_CHG_CTRL4, 7486cf635aSJavier Martinez Canillas CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK, 7586cf635aSJavier Martinez Canillas reg_data); 7686cf635aSJavier Martinez Canillas } 7786cf635aSJavier Martinez Canillas 7818c6c42cSBhumika Goyal static const struct regulator_ops max14577_safeout_ops = { 7986cf635aSJavier Martinez Canillas .is_enabled = regulator_is_enabled_regmap, 8086cf635aSJavier Martinez Canillas .enable = regulator_enable_regmap, 8186cf635aSJavier Martinez Canillas .disable = regulator_disable_regmap, 8286cf635aSJavier Martinez Canillas .list_voltage = regulator_list_voltage_linear, 8386cf635aSJavier Martinez Canillas }; 8486cf635aSJavier Martinez Canillas 8518c6c42cSBhumika Goyal static const struct regulator_ops max14577_charger_ops = { 8686cf635aSJavier Martinez Canillas .is_enabled = max14577_reg_is_enabled, 8786cf635aSJavier Martinez Canillas .enable = regulator_enable_regmap, 8886cf635aSJavier Martinez Canillas .disable = regulator_disable_regmap, 8986cf635aSJavier Martinez Canillas .get_current_limit = max14577_reg_get_current_limit, 9086cf635aSJavier Martinez Canillas .set_current_limit = max14577_reg_set_current_limit, 9186cf635aSJavier Martinez Canillas }; 9286cf635aSJavier Martinez Canillas 9386cf635aSJavier Martinez Canillas #define MAX14577_SAFEOUT_REG { \ 9486cf635aSJavier Martinez Canillas .name = "SAFEOUT", \ 9586cf635aSJavier Martinez Canillas .of_match = of_match_ptr("SAFEOUT"), \ 9686cf635aSJavier Martinez Canillas .regulators_node = of_match_ptr("regulators"), \ 9786cf635aSJavier Martinez Canillas .id = MAX14577_SAFEOUT, \ 9886cf635aSJavier Martinez Canillas .ops = &max14577_safeout_ops, \ 9986cf635aSJavier Martinez Canillas .type = REGULATOR_VOLTAGE, \ 10086cf635aSJavier Martinez Canillas .owner = THIS_MODULE, \ 10186cf635aSJavier Martinez Canillas .n_voltages = 1, \ 10286cf635aSJavier Martinez Canillas .min_uV = MAX14577_REGULATOR_SAFEOUT_VOLTAGE, \ 10386cf635aSJavier Martinez Canillas .enable_reg = MAX14577_REG_CONTROL2, \ 10486cf635aSJavier Martinez Canillas .enable_mask = CTRL2_SFOUTORD_MASK, \ 10586cf635aSJavier Martinez Canillas } 10686cf635aSJavier Martinez Canillas #define MAX14577_CHARGER_REG { \ 10786cf635aSJavier Martinez Canillas .name = "CHARGER", \ 10886cf635aSJavier Martinez Canillas .of_match = of_match_ptr("CHARGER"), \ 10986cf635aSJavier Martinez Canillas .regulators_node = of_match_ptr("regulators"), \ 11086cf635aSJavier Martinez Canillas .id = MAX14577_CHARGER, \ 11186cf635aSJavier Martinez Canillas .ops = &max14577_charger_ops, \ 11286cf635aSJavier Martinez Canillas .type = REGULATOR_CURRENT, \ 11386cf635aSJavier Martinez Canillas .owner = THIS_MODULE, \ 11486cf635aSJavier Martinez Canillas .enable_reg = MAX14577_CHG_REG_CHG_CTRL2, \ 11586cf635aSJavier Martinez Canillas .enable_mask = CHGCTRL2_MBCHOSTEN_MASK, \ 11686cf635aSJavier Martinez Canillas } 11786cf635aSJavier Martinez Canillas 11886cf635aSJavier Martinez Canillas static const struct regulator_desc max14577_supported_regulators[] = { 11986cf635aSJavier Martinez Canillas [MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG, 12086cf635aSJavier Martinez Canillas [MAX14577_CHARGER] = MAX14577_CHARGER_REG, 12186cf635aSJavier Martinez Canillas }; 12286cf635aSJavier Martinez Canillas 12318c6c42cSBhumika Goyal static const struct regulator_ops max77836_ldo_ops = { 12486cf635aSJavier Martinez Canillas .is_enabled = regulator_is_enabled_regmap, 12586cf635aSJavier Martinez Canillas .enable = regulator_enable_regmap, 12686cf635aSJavier Martinez Canillas .disable = regulator_disable_regmap, 12786cf635aSJavier Martinez Canillas .list_voltage = regulator_list_voltage_linear, 12886cf635aSJavier Martinez Canillas .map_voltage = regulator_map_voltage_linear, 12986cf635aSJavier Martinez Canillas .get_voltage_sel = regulator_get_voltage_sel_regmap, 13086cf635aSJavier Martinez Canillas .set_voltage_sel = regulator_set_voltage_sel_regmap, 13186cf635aSJavier Martinez Canillas /* TODO: add .set_suspend_mode */ 13286cf635aSJavier Martinez Canillas }; 13386cf635aSJavier Martinez Canillas 13486cf635aSJavier Martinez Canillas #define MAX77836_LDO_REG(num) { \ 13586cf635aSJavier Martinez Canillas .name = "LDO" # num, \ 13686cf635aSJavier Martinez Canillas .of_match = of_match_ptr("LDO" # num), \ 13786cf635aSJavier Martinez Canillas .regulators_node = of_match_ptr("regulators"), \ 13886cf635aSJavier Martinez Canillas .id = MAX77836_LDO ## num, \ 13986cf635aSJavier Martinez Canillas .ops = &max77836_ldo_ops, \ 14086cf635aSJavier Martinez Canillas .type = REGULATOR_VOLTAGE, \ 14186cf635aSJavier Martinez Canillas .owner = THIS_MODULE, \ 14286cf635aSJavier Martinez Canillas .n_voltages = MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, \ 14386cf635aSJavier Martinez Canillas .min_uV = MAX77836_REGULATOR_LDO_VOLTAGE_MIN, \ 14486cf635aSJavier Martinez Canillas .uV_step = MAX77836_REGULATOR_LDO_VOLTAGE_STEP, \ 14586cf635aSJavier Martinez Canillas .enable_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \ 14686cf635aSJavier Martinez Canillas .enable_mask = MAX77836_CNFG1_LDO_PWRMD_MASK, \ 14786cf635aSJavier Martinez Canillas .vsel_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \ 14886cf635aSJavier Martinez Canillas .vsel_mask = MAX77836_CNFG1_LDO_TV_MASK, \ 14986cf635aSJavier Martinez Canillas } 15086cf635aSJavier Martinez Canillas 15186cf635aSJavier Martinez Canillas static const struct regulator_desc max77836_supported_regulators[] = { 15286cf635aSJavier Martinez Canillas [MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG, 15386cf635aSJavier Martinez Canillas [MAX14577_CHARGER] = MAX14577_CHARGER_REG, 15486cf635aSJavier Martinez Canillas [MAX77836_LDO1] = MAX77836_LDO_REG(1), 15586cf635aSJavier Martinez Canillas [MAX77836_LDO2] = MAX77836_LDO_REG(2), 15686cf635aSJavier Martinez Canillas }; 15786cf635aSJavier Martinez Canillas 15886cf635aSJavier Martinez Canillas #ifdef CONFIG_OF 15986cf635aSJavier Martinez Canillas static struct of_regulator_match max14577_regulator_matches[] = { 16086cf635aSJavier Martinez Canillas { .name = "SAFEOUT", }, 16186cf635aSJavier Martinez Canillas { .name = "CHARGER", }, 16286cf635aSJavier Martinez Canillas }; 16386cf635aSJavier Martinez Canillas 16486cf635aSJavier Martinez Canillas static struct of_regulator_match max77836_regulator_matches[] = { 16586cf635aSJavier Martinez Canillas { .name = "SAFEOUT", }, 16686cf635aSJavier Martinez Canillas { .name = "CHARGER", }, 16786cf635aSJavier Martinez Canillas { .name = "LDO1", }, 16886cf635aSJavier Martinez Canillas { .name = "LDO2", }, 16986cf635aSJavier Martinez Canillas }; 17086cf635aSJavier Martinez Canillas 17186cf635aSJavier Martinez Canillas static inline struct regulator_init_data *match_init_data(int index, 17286cf635aSJavier Martinez Canillas enum maxim_device_type dev_type) 17386cf635aSJavier Martinez Canillas { 17486cf635aSJavier Martinez Canillas switch (dev_type) { 17586cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX77836: 17686cf635aSJavier Martinez Canillas return max77836_regulator_matches[index].init_data; 17786cf635aSJavier Martinez Canillas 17886cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX14577: 17986cf635aSJavier Martinez Canillas default: 18086cf635aSJavier Martinez Canillas return max14577_regulator_matches[index].init_data; 18186cf635aSJavier Martinez Canillas } 18286cf635aSJavier Martinez Canillas } 18386cf635aSJavier Martinez Canillas 18486cf635aSJavier Martinez Canillas static inline struct device_node *match_of_node(int index, 18586cf635aSJavier Martinez Canillas enum maxim_device_type dev_type) 18686cf635aSJavier Martinez Canillas { 18786cf635aSJavier Martinez Canillas switch (dev_type) { 18886cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX77836: 18986cf635aSJavier Martinez Canillas return max77836_regulator_matches[index].of_node; 19086cf635aSJavier Martinez Canillas 19186cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX14577: 19286cf635aSJavier Martinez Canillas default: 19386cf635aSJavier Martinez Canillas return max14577_regulator_matches[index].of_node; 19486cf635aSJavier Martinez Canillas } 19586cf635aSJavier Martinez Canillas } 19686cf635aSJavier Martinez Canillas #else /* CONFIG_OF */ 19786cf635aSJavier Martinez Canillas static inline struct regulator_init_data *match_init_data(int index, 19886cf635aSJavier Martinez Canillas enum maxim_device_type dev_type) 19986cf635aSJavier Martinez Canillas { 20086cf635aSJavier Martinez Canillas return NULL; 20186cf635aSJavier Martinez Canillas } 20286cf635aSJavier Martinez Canillas 20386cf635aSJavier Martinez Canillas static inline struct device_node *match_of_node(int index, 20486cf635aSJavier Martinez Canillas enum maxim_device_type dev_type) 20586cf635aSJavier Martinez Canillas { 20686cf635aSJavier Martinez Canillas return NULL; 20786cf635aSJavier Martinez Canillas } 20886cf635aSJavier Martinez Canillas #endif /* CONFIG_OF */ 20986cf635aSJavier Martinez Canillas 21086cf635aSJavier Martinez Canillas /** 21186cf635aSJavier Martinez Canillas * Registers for regulators of max77836 use different I2C slave addresses so 21286cf635aSJavier Martinez Canillas * different regmaps must be used for them. 21386cf635aSJavier Martinez Canillas * 21486cf635aSJavier Martinez Canillas * Returns proper regmap for accessing regulator passed by id. 21586cf635aSJavier Martinez Canillas */ 21686cf635aSJavier Martinez Canillas static struct regmap *max14577_get_regmap(struct max14577 *max14577, 21786cf635aSJavier Martinez Canillas int reg_id) 21886cf635aSJavier Martinez Canillas { 21986cf635aSJavier Martinez Canillas switch (max14577->dev_type) { 22086cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX77836: 22186cf635aSJavier Martinez Canillas switch (reg_id) { 22286cf635aSJavier Martinez Canillas case MAX77836_SAFEOUT ... MAX77836_CHARGER: 22386cf635aSJavier Martinez Canillas return max14577->regmap; 22486cf635aSJavier Martinez Canillas default: 22586cf635aSJavier Martinez Canillas /* MAX77836_LDO1 ... MAX77836_LDO2 */ 22686cf635aSJavier Martinez Canillas return max14577->regmap_pmic; 22786cf635aSJavier Martinez Canillas } 22886cf635aSJavier Martinez Canillas 22986cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX14577: 23086cf635aSJavier Martinez Canillas default: 23186cf635aSJavier Martinez Canillas return max14577->regmap; 23286cf635aSJavier Martinez Canillas } 23386cf635aSJavier Martinez Canillas } 23486cf635aSJavier Martinez Canillas 23586cf635aSJavier Martinez Canillas static int max14577_regulator_probe(struct platform_device *pdev) 23686cf635aSJavier Martinez Canillas { 23786cf635aSJavier Martinez Canillas struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); 23886cf635aSJavier Martinez Canillas struct max14577_platform_data *pdata = dev_get_platdata(max14577->dev); 23986cf635aSJavier Martinez Canillas int i, ret = 0; 24086cf635aSJavier Martinez Canillas struct regulator_config config = {}; 24186cf635aSJavier Martinez Canillas const struct regulator_desc *supported_regulators; 24286cf635aSJavier Martinez Canillas unsigned int supported_regulators_size; 24386cf635aSJavier Martinez Canillas enum maxim_device_type dev_type = max14577->dev_type; 24486cf635aSJavier Martinez Canillas 24586cf635aSJavier Martinez Canillas switch (dev_type) { 24686cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX77836: 24786cf635aSJavier Martinez Canillas supported_regulators = max77836_supported_regulators; 24886cf635aSJavier Martinez Canillas supported_regulators_size = ARRAY_SIZE(max77836_supported_regulators); 24986cf635aSJavier Martinez Canillas break; 25086cf635aSJavier Martinez Canillas case MAXIM_DEVICE_TYPE_MAX14577: 25186cf635aSJavier Martinez Canillas default: 25286cf635aSJavier Martinez Canillas supported_regulators = max14577_supported_regulators; 25386cf635aSJavier Martinez Canillas supported_regulators_size = ARRAY_SIZE(max14577_supported_regulators); 25486cf635aSJavier Martinez Canillas } 25586cf635aSJavier Martinez Canillas 25686cf635aSJavier Martinez Canillas config.dev = max14577->dev; 25786cf635aSJavier Martinez Canillas config.driver_data = max14577; 25886cf635aSJavier Martinez Canillas 25986cf635aSJavier Martinez Canillas for (i = 0; i < supported_regulators_size; i++) { 26086cf635aSJavier Martinez Canillas struct regulator_dev *regulator; 26186cf635aSJavier Martinez Canillas /* 26286cf635aSJavier Martinez Canillas * Index of supported_regulators[] is also the id and must 26386cf635aSJavier Martinez Canillas * match index of pdata->regulators[]. 26486cf635aSJavier Martinez Canillas */ 26586cf635aSJavier Martinez Canillas if (pdata && pdata->regulators) { 26686cf635aSJavier Martinez Canillas config.init_data = pdata->regulators[i].initdata; 26786cf635aSJavier Martinez Canillas config.of_node = pdata->regulators[i].of_node; 26886cf635aSJavier Martinez Canillas } else { 26986cf635aSJavier Martinez Canillas config.init_data = match_init_data(i, dev_type); 27086cf635aSJavier Martinez Canillas config.of_node = match_of_node(i, dev_type); 27186cf635aSJavier Martinez Canillas } 27286cf635aSJavier Martinez Canillas config.regmap = max14577_get_regmap(max14577, 27386cf635aSJavier Martinez Canillas supported_regulators[i].id); 27486cf635aSJavier Martinez Canillas 27586cf635aSJavier Martinez Canillas regulator = devm_regulator_register(&pdev->dev, 27686cf635aSJavier Martinez Canillas &supported_regulators[i], &config); 27786cf635aSJavier Martinez Canillas if (IS_ERR(regulator)) { 27886cf635aSJavier Martinez Canillas ret = PTR_ERR(regulator); 27986cf635aSJavier Martinez Canillas dev_err(&pdev->dev, 28086cf635aSJavier Martinez Canillas "Regulator init failed for %d/%s with error: %d\n", 28186cf635aSJavier Martinez Canillas i, supported_regulators[i].name, ret); 28286cf635aSJavier Martinez Canillas return ret; 28386cf635aSJavier Martinez Canillas } 28486cf635aSJavier Martinez Canillas } 28586cf635aSJavier Martinez Canillas 28686cf635aSJavier Martinez Canillas return ret; 28786cf635aSJavier Martinez Canillas } 28886cf635aSJavier Martinez Canillas 28986cf635aSJavier Martinez Canillas static const struct platform_device_id max14577_regulator_id[] = { 29086cf635aSJavier Martinez Canillas { "max14577-regulator", MAXIM_DEVICE_TYPE_MAX14577, }, 29186cf635aSJavier Martinez Canillas { "max77836-regulator", MAXIM_DEVICE_TYPE_MAX77836, }, 29286cf635aSJavier Martinez Canillas { } 29386cf635aSJavier Martinez Canillas }; 29486cf635aSJavier Martinez Canillas MODULE_DEVICE_TABLE(platform, max14577_regulator_id); 29586cf635aSJavier Martinez Canillas 29686cf635aSJavier Martinez Canillas static struct platform_driver max14577_regulator_driver = { 29786cf635aSJavier Martinez Canillas .driver = { 29886cf635aSJavier Martinez Canillas .name = "max14577-regulator", 29986cf635aSJavier Martinez Canillas }, 30086cf635aSJavier Martinez Canillas .probe = max14577_regulator_probe, 30186cf635aSJavier Martinez Canillas .id_table = max14577_regulator_id, 30286cf635aSJavier Martinez Canillas }; 30386cf635aSJavier Martinez Canillas 30486cf635aSJavier Martinez Canillas static int __init max14577_regulator_init(void) 30586cf635aSJavier Martinez Canillas { 30686cf635aSJavier Martinez Canillas BUILD_BUG_ON(ARRAY_SIZE(max14577_supported_regulators) != MAX14577_REGULATOR_NUM); 30786cf635aSJavier Martinez Canillas BUILD_BUG_ON(ARRAY_SIZE(max77836_supported_regulators) != MAX77836_REGULATOR_NUM); 30886cf635aSJavier Martinez Canillas 30986cf635aSJavier Martinez Canillas BUILD_BUG_ON(MAX77836_REGULATOR_LDO_VOLTAGE_MIN + 31086cf635aSJavier Martinez Canillas (MAX77836_REGULATOR_LDO_VOLTAGE_STEP * 31186cf635aSJavier Martinez Canillas (MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM - 1)) != 31286cf635aSJavier Martinez Canillas MAX77836_REGULATOR_LDO_VOLTAGE_MAX); 31386cf635aSJavier Martinez Canillas 31486cf635aSJavier Martinez Canillas return platform_driver_register(&max14577_regulator_driver); 31586cf635aSJavier Martinez Canillas } 31686cf635aSJavier Martinez Canillas subsys_initcall(max14577_regulator_init); 31786cf635aSJavier Martinez Canillas 31886cf635aSJavier Martinez Canillas static void __exit max14577_regulator_exit(void) 31986cf635aSJavier Martinez Canillas { 32086cf635aSJavier Martinez Canillas platform_driver_unregister(&max14577_regulator_driver); 32186cf635aSJavier Martinez Canillas } 32286cf635aSJavier Martinez Canillas module_exit(max14577_regulator_exit); 32386cf635aSJavier Martinez Canillas 324cea8aa3aSKrzysztof Kozlowski MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>"); 32586cf635aSJavier Martinez Canillas MODULE_DESCRIPTION("Maxim 14577/77836 regulator driver"); 32686cf635aSJavier Martinez Canillas MODULE_LICENSE("GPL"); 32786cf635aSJavier Martinez Canillas MODULE_ALIAS("platform:max14577-regulator"); 328