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304 lines
8.6 KiB
304 lines
8.6 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// max77693.c - Regulator driver for the Maxim 77693 and 77843 |
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// |
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// Copyright (C) 2013-2015 Samsung Electronics |
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// Jonghwa Lee <[email protected]> |
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// Krzysztof Kozlowski <[email protected]> |
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// |
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// This driver is based on max77686.c |
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#include <linux/err.h> |
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#include <linux/slab.h> |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/export.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/mfd/max77693.h> |
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#include <linux/mfd/max77693-common.h> |
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#include <linux/mfd/max77693-private.h> |
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#include <linux/mfd/max77843-private.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/regmap.h> |
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/* |
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* ID for MAX77843 regulators. |
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* There is no need for such for MAX77693. |
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*/ |
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enum max77843_regulator_type { |
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MAX77843_SAFEOUT1 = 0, |
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MAX77843_SAFEOUT2, |
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MAX77843_CHARGER, |
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MAX77843_NUM, |
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}; |
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/* Register differences between chargers: MAX77693 and MAX77843 */ |
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struct chg_reg_data { |
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unsigned int linear_reg; |
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unsigned int linear_mask; |
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unsigned int uA_step; |
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unsigned int min_sel; |
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}; |
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/* |
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* MAX77693 CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA |
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* 0x00, 0x01, 0x2, 0x03 = 60 mA |
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* 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA |
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* Actually for MAX77693 the driver manipulates the maximum input current, |
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* not the fast charge current (output). This should be fixed. |
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* |
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* On MAX77843 the calculation formula is the same (except values). |
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* Fortunately it properly manipulates the fast charge current. |
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*/ |
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static int max77693_chg_get_current_limit(struct regulator_dev *rdev) |
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{ |
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const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev); |
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unsigned int chg_min_uA = rdev->constraints->min_uA; |
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unsigned int chg_max_uA = rdev->constraints->max_uA; |
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unsigned int reg, sel; |
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unsigned int val; |
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int ret; |
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ret = regmap_read(rdev->regmap, reg_data->linear_reg, ®); |
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if (ret < 0) |
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return ret; |
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sel = reg & reg_data->linear_mask; |
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/* the first four codes for charger current are all 60mA */ |
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if (sel <= reg_data->min_sel) |
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sel = 0; |
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else |
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sel -= reg_data->min_sel; |
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val = chg_min_uA + reg_data->uA_step * sel; |
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if (val > chg_max_uA) |
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return -EINVAL; |
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return val; |
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} |
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static int max77693_chg_set_current_limit(struct regulator_dev *rdev, |
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int min_uA, int max_uA) |
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{ |
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const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev); |
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unsigned int chg_min_uA = rdev->constraints->min_uA; |
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int sel = 0; |
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while (chg_min_uA + reg_data->uA_step * sel < min_uA) |
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sel++; |
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if (chg_min_uA + reg_data->uA_step * sel > max_uA) |
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return -EINVAL; |
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/* the first four codes for charger current are all 60mA */ |
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sel += reg_data->min_sel; |
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return regmap_write(rdev->regmap, reg_data->linear_reg, sel); |
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} |
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/* end of CHARGER regulator ops */ |
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/* Returns regmap suitable for given regulator on chosen device */ |
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static struct regmap *max77693_get_regmap(enum max77693_types type, |
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struct max77693_dev *max77693, |
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int reg_id) |
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{ |
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if (type == TYPE_MAX77693) |
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return max77693->regmap; |
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/* Else: TYPE_MAX77843 */ |
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switch (reg_id) { |
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case MAX77843_SAFEOUT1: |
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case MAX77843_SAFEOUT2: |
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return max77693->regmap; |
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case MAX77843_CHARGER: |
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return max77693->regmap_chg; |
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default: |
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return max77693->regmap; |
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} |
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} |
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static const unsigned int max77693_safeout_table[] = { |
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4850000, |
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4900000, |
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4950000, |
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3300000, |
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}; |
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static const struct regulator_ops max77693_safeout_ops = { |
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.list_voltage = regulator_list_voltage_table, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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}; |
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static const struct regulator_ops max77693_charger_ops = { |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.get_current_limit = max77693_chg_get_current_limit, |
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.set_current_limit = max77693_chg_set_current_limit, |
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}; |
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#define max77693_regulator_desc_esafeout(_num) { \ |
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.name = "ESAFEOUT"#_num, \ |
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.id = MAX77693_ESAFEOUT##_num, \ |
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.of_match = of_match_ptr("ESAFEOUT"#_num), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.n_voltages = 4, \ |
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.ops = &max77693_safeout_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.volt_table = max77693_safeout_table, \ |
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.vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ |
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.vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \ |
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.enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ |
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.enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \ |
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} |
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static const struct regulator_desc max77693_supported_regulators[] = { |
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max77693_regulator_desc_esafeout(1), |
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max77693_regulator_desc_esafeout(2), |
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{ |
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.name = "CHARGER", |
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.id = MAX77693_CHARGER, |
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.of_match = of_match_ptr("CHARGER"), |
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.regulators_node = of_match_ptr("regulators"), |
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.ops = &max77693_charger_ops, |
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.type = REGULATOR_CURRENT, |
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.owner = THIS_MODULE, |
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.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00, |
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.enable_mask = CHG_CNFG_00_CHG_MASK | |
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CHG_CNFG_00_BUCK_MASK, |
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.enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK, |
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}, |
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}; |
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static const struct chg_reg_data max77693_chg_reg_data = { |
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.linear_reg = MAX77693_CHG_REG_CHG_CNFG_09, |
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.linear_mask = CHG_CNFG_09_CHGIN_ILIM_MASK, |
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.uA_step = 20000, |
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.min_sel = 3, |
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}; |
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#define max77843_regulator_desc_esafeout(num) { \ |
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.name = "SAFEOUT" # num, \ |
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.id = MAX77843_SAFEOUT ## num, \ |
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.ops = &max77693_safeout_ops, \ |
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.of_match = of_match_ptr("SAFEOUT" # num), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.n_voltages = ARRAY_SIZE(max77693_safeout_table), \ |
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.volt_table = max77693_safeout_table, \ |
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.enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \ |
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.enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT ## num, \ |
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.vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \ |
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.vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT ## num ## _MASK, \ |
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} |
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static const struct regulator_desc max77843_supported_regulators[] = { |
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[MAX77843_SAFEOUT1] = max77843_regulator_desc_esafeout(1), |
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[MAX77843_SAFEOUT2] = max77843_regulator_desc_esafeout(2), |
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[MAX77843_CHARGER] = { |
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.name = "CHARGER", |
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.id = MAX77843_CHARGER, |
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.ops = &max77693_charger_ops, |
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.of_match = of_match_ptr("CHARGER"), |
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.regulators_node = of_match_ptr("regulators"), |
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.type = REGULATOR_CURRENT, |
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.owner = THIS_MODULE, |
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.enable_reg = MAX77843_CHG_REG_CHG_CNFG_00, |
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.enable_mask = MAX77843_CHG_MASK, |
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.enable_val = MAX77843_CHG_MASK, |
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}, |
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}; |
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static const struct chg_reg_data max77843_chg_reg_data = { |
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.linear_reg = MAX77843_CHG_REG_CHG_CNFG_02, |
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.linear_mask = MAX77843_CHG_FAST_CHG_CURRENT_MASK, |
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.uA_step = MAX77843_CHG_FAST_CHG_CURRENT_STEP, |
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.min_sel = 2, |
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}; |
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static int max77693_pmic_probe(struct platform_device *pdev) |
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{ |
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enum max77693_types type = platform_get_device_id(pdev)->driver_data; |
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struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
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const struct regulator_desc *regulators; |
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unsigned int regulators_size; |
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int i; |
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struct regulator_config config = { }; |
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config.dev = iodev->dev; |
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switch (type) { |
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case TYPE_MAX77693: |
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regulators = max77693_supported_regulators; |
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regulators_size = ARRAY_SIZE(max77693_supported_regulators); |
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config.driver_data = (void *)&max77693_chg_reg_data; |
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break; |
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case TYPE_MAX77843: |
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regulators = max77843_supported_regulators; |
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regulators_size = ARRAY_SIZE(max77843_supported_regulators); |
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config.driver_data = (void *)&max77843_chg_reg_data; |
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break; |
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default: |
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dev_err(&pdev->dev, "Unsupported device type: %u\n", type); |
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return -ENODEV; |
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} |
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for (i = 0; i < regulators_size; i++) { |
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struct regulator_dev *rdev; |
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config.regmap = max77693_get_regmap(type, iodev, |
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regulators[i].id); |
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rdev = devm_regulator_register(&pdev->dev, |
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®ulators[i], &config); |
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if (IS_ERR(rdev)) { |
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dev_err(&pdev->dev, |
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"Failed to initialize regulator-%d\n", i); |
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return PTR_ERR(rdev); |
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} |
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} |
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return 0; |
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} |
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static const struct platform_device_id max77693_pmic_id[] = { |
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{ "max77693-pmic", TYPE_MAX77693 }, |
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{ "max77843-regulator", TYPE_MAX77843 }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(platform, max77693_pmic_id); |
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static struct platform_driver max77693_pmic_driver = { |
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.driver = { |
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.name = "max77693-pmic", |
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}, |
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.probe = max77693_pmic_probe, |
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.id_table = max77693_pmic_id, |
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}; |
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static int __init max77693_pmic_init(void) |
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{ |
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return platform_driver_register(&max77693_pmic_driver); |
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} |
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subsys_initcall(max77693_pmic_init); |
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static void __exit max77693_pmic_cleanup(void) |
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{ |
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platform_driver_unregister(&max77693_pmic_driver); |
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} |
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module_exit(max77693_pmic_cleanup); |
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MODULE_DESCRIPTION("MAXIM 77693/77843 regulator driver"); |
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MODULE_AUTHOR("Jonghwa Lee <[email protected]>"); |
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MODULE_AUTHOR("Krzysztof Kozlowski <[email protected]>"); |
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MODULE_LICENSE("GPL");
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