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80b022e2 JL |
1 | /* |
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> | |
d0540f91 | 34 | #include <linux/regmap.h> |
80b022e2 JL |
35 | |
36 | #define CHGIN_ILIM_STEP_20mA 20000 | |
37 | ||
80b022e2 JL |
38 | /* |
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 | */ | |
43 | static 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; | |
d0540f91 | 47 | unsigned int reg, sel; |
80b022e2 JL |
48 | unsigned int val; |
49 | int ret; | |
50 | ||
d0540f91 | 51 | ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, ®); |
80b022e2 JL |
52 | 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 | ||
70 | static 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 | ||
f3ecdd7b | 79 | if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA) |
80b022e2 JL |
80 | return -EINVAL; |
81 | ||
82 | /* the first four codes for charger current are all 60mA */ | |
83 | sel += 3; | |
84 | ||
d0540f91 | 85 | return regmap_write(rdev->regmap, |
80b022e2 JL |
86 | MAX77693_CHG_REG_CHG_CNFG_09, sel); |
87 | } | |
88 | /* end of CHARGER regulator ops */ | |
89 | ||
90 | static const unsigned int max77693_safeout_table[] = { | |
91 | 4850000, | |
92 | 4900000, | |
93 | 4950000, | |
94 | 3300000, | |
95 | }; | |
96 | ||
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, | |
104 | }; | |
105 | ||
106 | static struct regulator_ops max77693_charger_ops = { | |
39d23308 | 107 | .is_enabled = regulator_is_enabled_regmap, |
80b022e2 JL |
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, | |
112 | }; | |
113 | ||
114 | #define regulator_desc_esafeout(_num) { \ | |
115 | .name = "ESAFEOUT"#_num, \ | |
116 | .id = MAX77693_ESAFEOUT##_num, \ | |
222d0f04 KK |
117 | .of_match = of_match_ptr("ESAFEOUT"#_num), \ |
118 | .regulators_node = of_match_ptr("regulators"), \ | |
80b022e2 JL |
119 | .n_voltages = 4, \ |
120 | .ops = &max77693_safeout_ops, \ | |
121 | .type = REGULATOR_VOLTAGE, \ | |
52f48bf3 | 122 | .owner = THIS_MODULE, \ |
80b022e2 JL |
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 , \ | |
128 | } | |
129 | ||
2515b24c | 130 | static const struct regulator_desc regulators[] = { |
80b022e2 JL |
131 | regulator_desc_esafeout(1), |
132 | regulator_desc_esafeout(2), | |
133 | { | |
134 | .name = "CHARGER", | |
135 | .id = MAX77693_CHARGER, | |
222d0f04 KK |
136 | .of_match = of_match_ptr("CHARGER"), |
137 | .regulators_node = of_match_ptr("regulators"), | |
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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, | |
39d23308 | 144 | .enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK, |
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145 | }, |
146 | }; | |
147 | ||
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148 | static int max77693_pmic_probe(struct platform_device *pdev) |
149 | { | |
150 | struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
222d0f04 | 151 | int i; |
ca0c37a0 | 152 | struct regulator_config config = { }; |
80b022e2 | 153 | |
222d0f04 | 154 | config.dev = iodev->dev; |
80b022e2 | 155 | config.regmap = iodev->regmap; |
80b022e2 | 156 | |
222d0f04 | 157 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
640c24a7 | 158 | struct regulator_dev *rdev; |
80b022e2 | 159 | |
640c24a7 | 160 | rdev = devm_regulator_register(&pdev->dev, |
222d0f04 | 161 | ®ulators[i], &config); |
640c24a7 KK |
162 | if (IS_ERR(rdev)) { |
163 | dev_err(&pdev->dev, | |
222d0f04 | 164 | "Failed to initialize regulator-%d\n", i); |
640c24a7 | 165 | return PTR_ERR(rdev); |
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166 | } |
167 | } | |
168 | ||
80b022e2 JL |
169 | return 0; |
170 | } | |
171 | ||
172 | static const struct platform_device_id max77693_pmic_id[] = { | |
173 | {"max77693-pmic", 0}, | |
174 | {}, | |
175 | }; | |
176 | ||
177 | MODULE_DEVICE_TABLE(platform, max77693_pmic_id); | |
178 | ||
179 | static struct platform_driver max77693_pmic_driver = { | |
180 | .driver = { | |
181 | .name = "max77693-pmic", | |
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182 | }, |
183 | .probe = max77693_pmic_probe, | |
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184 | .id_table = max77693_pmic_id, |
185 | }; | |
186 | ||
187 | module_platform_driver(max77693_pmic_driver); | |
188 | ||
189 | MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver"); | |
190 | MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>"); | |
191 | MODULE_LICENSE("GPL"); |