2 * max77693.c - Regulator driver for the Maxim 77693
4 * Copyright (C) 2013 Samsung Electronics
5 * Jonghwa Lee <jonghwa3.lee@samsung.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * This driver is based on max77686.c
24 #include <linux/err.h>
25 #include <linux/slab.h>
26 #include <linux/platform_device.h>
27 #include <linux/module.h>
28 #include <linux/export.h>
29 #include <linux/regulator/driver.h>
30 #include <linux/regulator/machine.h>
31 #include <linux/mfd/max77693.h>
32 #include <linux/mfd/max77693-private.h>
33 #include <linux/regulator/of_regulator.h>
34 #include <linux/regmap.h>
36 #define CHGIN_ILIM_STEP_20mA 20000
39 * CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
40 * 0x00, 0x01, 0x2, 0x03 = 60 mA
41 * 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA
43 static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
45 unsigned int chg_min_uA = rdev->constraints->min_uA;
46 unsigned int chg_max_uA = rdev->constraints->max_uA;
47 unsigned int reg, sel;
51 ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, ®);
55 sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK;
57 /* the first four codes for charger current are all 60mA */
63 val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel;
70 static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
71 int min_uA, int max_uA)
73 unsigned int chg_min_uA = rdev->constraints->min_uA;
76 while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA)
79 if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA)
82 /* the first four codes for charger current are all 60mA */
85 return regmap_write(rdev->regmap,
86 MAX77693_CHG_REG_CHG_CNFG_09, sel);
88 /* end of CHARGER regulator ops */
90 static const unsigned int max77693_safeout_table[] = {
97 static struct regulator_ops max77693_safeout_ops = {
98 .list_voltage = regulator_list_voltage_table,
99 .is_enabled = regulator_is_enabled_regmap,
100 .enable = regulator_enable_regmap,
101 .disable = regulator_disable_regmap,
102 .get_voltage_sel = regulator_get_voltage_sel_regmap,
103 .set_voltage_sel = regulator_set_voltage_sel_regmap,
106 static struct regulator_ops max77693_charger_ops = {
107 .is_enabled = regulator_is_enabled_regmap,
108 .enable = regulator_enable_regmap,
109 .disable = regulator_disable_regmap,
110 .get_current_limit = max77693_chg_get_current_limit,
111 .set_current_limit = max77693_chg_set_current_limit,
114 #define regulator_desc_esafeout(_num) { \
115 .name = "ESAFEOUT"#_num, \
116 .id = MAX77693_ESAFEOUT##_num, \
117 .of_match = of_match_ptr("ESAFEOUT"#_num), \
118 .regulators_node = of_match_ptr("regulators"), \
120 .ops = &max77693_safeout_ops, \
121 .type = REGULATOR_VOLTAGE, \
122 .owner = THIS_MODULE, \
123 .volt_table = max77693_safeout_table, \
124 .vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
125 .vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \
126 .enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
127 .enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \
130 static const struct regulator_desc regulators[] = {
131 regulator_desc_esafeout(1),
132 regulator_desc_esafeout(2),
135 .id = MAX77693_CHARGER,
136 .of_match = of_match_ptr("CHARGER"),
137 .regulators_node = of_match_ptr("regulators"),
138 .ops = &max77693_charger_ops,
139 .type = REGULATOR_CURRENT,
140 .owner = THIS_MODULE,
141 .enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
142 .enable_mask = CHG_CNFG_00_CHG_MASK |
143 CHG_CNFG_00_BUCK_MASK,
144 .enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK,
148 static int max77693_pmic_probe(struct platform_device *pdev)
150 struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
152 struct regulator_config config = { };
154 config.dev = iodev->dev;
155 config.regmap = iodev->regmap;
157 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
158 struct regulator_dev *rdev;
160 rdev = devm_regulator_register(&pdev->dev,
161 ®ulators[i], &config);
164 "Failed to initialize regulator-%d\n", i);
165 return PTR_ERR(rdev);
172 static const struct platform_device_id max77693_pmic_id[] = {
173 {"max77693-pmic", 0},
177 MODULE_DEVICE_TABLE(platform, max77693_pmic_id);
179 static struct platform_driver max77693_pmic_driver = {
181 .name = "max77693-pmic",
183 .probe = max77693_pmic_probe,
184 .id_table = max77693_pmic_id,
187 module_platform_driver(max77693_pmic_driver);
189 MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver");
190 MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
191 MODULE_LICENSE("GPL");