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Jonghwa Lee80b022e2013-06-25 10:08:38 +09001/*
2 * max77693.c - Regulator driver for the Maxim 77693
3 *
4 * Copyright (C) 2013 Samsung Electronics
5 * Jonghwa Lee <jonghwa3.lee@samsung.com>
6 *
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.
11 *
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.
16 *
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
20 *
21 * This driver is based on max77686.c
22 */
23
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>
Robert Baldygad0540f92014-05-21 08:52:47 +020034#include <linux/regmap.h>
Jonghwa Lee80b022e2013-06-25 10:08:38 +090035
36#define CHGIN_ILIM_STEP_20mA 20000
37
Jonghwa Lee80b022e2013-06-25 10:08:38 +090038/*
39 * CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
40 * 0x00, 0x01, 0x2, 0x03 = 60 mA
41 * 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA
42 */
43static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
44{
45 unsigned int chg_min_uA = rdev->constraints->min_uA;
46 unsigned int chg_max_uA = rdev->constraints->max_uA;
Robert Baldygad0540f92014-05-21 08:52:47 +020047 unsigned int reg, sel;
Jonghwa Lee80b022e2013-06-25 10:08:38 +090048 unsigned int val;
49 int ret;
50
Robert Baldygad0540f92014-05-21 08:52:47 +020051 ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, &reg);
Jonghwa Lee80b022e2013-06-25 10:08:38 +090052 if (ret < 0)
53 return ret;
54
55 sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK;
56
57 /* the first four codes for charger current are all 60mA */
58 if (sel <= 3)
59 sel = 0;
60 else
61 sel -= 3;
62
63 val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel;
64 if (val > chg_max_uA)
65 return -EINVAL;
66
67 return val;
68}
69
70static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
71 int min_uA, int max_uA)
72{
73 unsigned int chg_min_uA = rdev->constraints->min_uA;
74 int sel = 0;
75
76 while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA)
77 sel++;
78
Axel Linf3ecdd72013-06-29 11:37:29 +080079 if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA)
Jonghwa Lee80b022e2013-06-25 10:08:38 +090080 return -EINVAL;
81
82 /* the first four codes for charger current are all 60mA */
83 sel += 3;
84
Robert Baldygad0540f92014-05-21 08:52:47 +020085 return regmap_write(rdev->regmap,
Jonghwa Lee80b022e2013-06-25 10:08:38 +090086 MAX77693_CHG_REG_CHG_CNFG_09, sel);
87}
88/* end of CHARGER regulator ops */
89
90static const unsigned int max77693_safeout_table[] = {
91 4850000,
92 4900000,
93 4950000,
94 3300000,
95};
96
97static 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,
104};
105
106static struct regulator_ops max77693_charger_ops = {
Krzysztof Kozlowski39d23302015-04-29 19:58:28 +0900107 .is_enabled = regulator_is_enabled_regmap,
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900108 .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,
112};
113
114#define regulator_desc_esafeout(_num) { \
115 .name = "ESAFEOUT"#_num, \
116 .id = MAX77693_ESAFEOUT##_num, \
Krzysztof Kozlowski222d0f02015-03-26 11:35:58 +0100117 .of_match = of_match_ptr("ESAFEOUT"#_num), \
118 .regulators_node = of_match_ptr("regulators"), \
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900119 .n_voltages = 4, \
120 .ops = &max77693_safeout_ops, \
121 .type = REGULATOR_VOLTAGE, \
Axel Lin52f48bf2013-12-24 21:37:50 +0800122 .owner = THIS_MODULE, \
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900123 .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 , \
128}
129
Krzysztof Kozlowski2515b242014-10-27 16:44:12 +0100130static const struct regulator_desc regulators[] = {
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900131 regulator_desc_esafeout(1),
132 regulator_desc_esafeout(2),
133 {
134 .name = "CHARGER",
135 .id = MAX77693_CHARGER,
Krzysztof Kozlowski222d0f02015-03-26 11:35:58 +0100136 .of_match = of_match_ptr("CHARGER"),
137 .regulators_node = of_match_ptr("regulators"),
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900138 .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,
Krzysztof Kozlowski39d23302015-04-29 19:58:28 +0900144 .enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK,
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900145 },
146};
147
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900148static int max77693_pmic_probe(struct platform_device *pdev)
149{
150 struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
Krzysztof Kozlowski222d0f02015-03-26 11:35:58 +0100151 int i;
Krzysztof Kozlowskica0c37a2014-11-03 15:07:05 +0100152 struct regulator_config config = { };
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900153
Krzysztof Kozlowski222d0f02015-03-26 11:35:58 +0100154 config.dev = iodev->dev;
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900155 config.regmap = iodev->regmap;
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900156
Krzysztof Kozlowski222d0f02015-03-26 11:35:58 +0100157 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
Krzysztof Kozlowski640c24a2014-03-10 09:32:46 +0100158 struct regulator_dev *rdev;
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900159
Krzysztof Kozlowski640c24a2014-03-10 09:32:46 +0100160 rdev = devm_regulator_register(&pdev->dev,
Krzysztof Kozlowski222d0f02015-03-26 11:35:58 +0100161 &regulators[i], &config);
Krzysztof Kozlowski640c24a2014-03-10 09:32:46 +0100162 if (IS_ERR(rdev)) {
163 dev_err(&pdev->dev,
Krzysztof Kozlowski222d0f02015-03-26 11:35:58 +0100164 "Failed to initialize regulator-%d\n", i);
Krzysztof Kozlowski640c24a2014-03-10 09:32:46 +0100165 return PTR_ERR(rdev);
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900166 }
167 }
168
169 return 0;
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900170}
171
172static const struct platform_device_id max77693_pmic_id[] = {
173 {"max77693-pmic", 0},
174 {},
175};
176
177MODULE_DEVICE_TABLE(platform, max77693_pmic_id);
178
179static struct platform_driver max77693_pmic_driver = {
180 .driver = {
181 .name = "max77693-pmic",
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900182 },
183 .probe = max77693_pmic_probe,
Jonghwa Lee80b022e2013-06-25 10:08:38 +0900184 .id_table = max77693_pmic_id,
185};
186
187module_platform_driver(max77693_pmic_driver);
188
189MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver");
190MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
191MODULE_LICENSE("GPL");