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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 | /* CHARGER regulator ops */ |
39 | /* CHARGER regulator uses two bits for enabling */ | |
40 | static int max77693_chg_is_enabled(struct regulator_dev *rdev) | |
41 | { | |
42 | int ret; | |
d0540f91 | 43 | unsigned int val; |
80b022e2 | 44 | |
d0540f91 | 45 | ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val); |
80b022e2 JL |
46 | if (ret) |
47 | return ret; | |
48 | ||
49 | return (val & rdev->desc->enable_mask) == rdev->desc->enable_mask; | |
50 | } | |
51 | ||
52 | /* | |
53 | * CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA | |
54 | * 0x00, 0x01, 0x2, 0x03 = 60 mA | |
55 | * 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA | |
56 | */ | |
57 | static int max77693_chg_get_current_limit(struct regulator_dev *rdev) | |
58 | { | |
59 | unsigned int chg_min_uA = rdev->constraints->min_uA; | |
60 | unsigned int chg_max_uA = rdev->constraints->max_uA; | |
d0540f91 | 61 | unsigned int reg, sel; |
80b022e2 JL |
62 | unsigned int val; |
63 | int ret; | |
64 | ||
d0540f91 | 65 | ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, ®); |
80b022e2 JL |
66 | if (ret < 0) |
67 | return ret; | |
68 | ||
69 | sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK; | |
70 | ||
71 | /* the first four codes for charger current are all 60mA */ | |
72 | if (sel <= 3) | |
73 | sel = 0; | |
74 | else | |
75 | sel -= 3; | |
76 | ||
77 | val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel; | |
78 | if (val > chg_max_uA) | |
79 | return -EINVAL; | |
80 | ||
81 | return val; | |
82 | } | |
83 | ||
84 | static int max77693_chg_set_current_limit(struct regulator_dev *rdev, | |
85 | int min_uA, int max_uA) | |
86 | { | |
87 | unsigned int chg_min_uA = rdev->constraints->min_uA; | |
88 | int sel = 0; | |
89 | ||
90 | while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA) | |
91 | sel++; | |
92 | ||
f3ecdd7b | 93 | if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA) |
80b022e2 JL |
94 | return -EINVAL; |
95 | ||
96 | /* the first four codes for charger current are all 60mA */ | |
97 | sel += 3; | |
98 | ||
d0540f91 | 99 | return regmap_write(rdev->regmap, |
80b022e2 JL |
100 | MAX77693_CHG_REG_CHG_CNFG_09, sel); |
101 | } | |
102 | /* end of CHARGER regulator ops */ | |
103 | ||
104 | static const unsigned int max77693_safeout_table[] = { | |
105 | 4850000, | |
106 | 4900000, | |
107 | 4950000, | |
108 | 3300000, | |
109 | }; | |
110 | ||
111 | static struct regulator_ops max77693_safeout_ops = { | |
112 | .list_voltage = regulator_list_voltage_table, | |
113 | .is_enabled = regulator_is_enabled_regmap, | |
114 | .enable = regulator_enable_regmap, | |
115 | .disable = regulator_disable_regmap, | |
116 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
117 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
118 | }; | |
119 | ||
120 | static struct regulator_ops max77693_charger_ops = { | |
121 | .is_enabled = max77693_chg_is_enabled, | |
122 | .enable = regulator_enable_regmap, | |
123 | .disable = regulator_disable_regmap, | |
124 | .get_current_limit = max77693_chg_get_current_limit, | |
125 | .set_current_limit = max77693_chg_set_current_limit, | |
126 | }; | |
127 | ||
128 | #define regulator_desc_esafeout(_num) { \ | |
129 | .name = "ESAFEOUT"#_num, \ | |
130 | .id = MAX77693_ESAFEOUT##_num, \ | |
222d0f04 KK |
131 | .of_match = of_match_ptr("ESAFEOUT"#_num), \ |
132 | .regulators_node = of_match_ptr("regulators"), \ | |
80b022e2 JL |
133 | .n_voltages = 4, \ |
134 | .ops = &max77693_safeout_ops, \ | |
135 | .type = REGULATOR_VOLTAGE, \ | |
52f48bf3 | 136 | .owner = THIS_MODULE, \ |
80b022e2 JL |
137 | .volt_table = max77693_safeout_table, \ |
138 | .vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ | |
139 | .vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \ | |
140 | .enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ | |
141 | .enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \ | |
142 | } | |
143 | ||
2515b24c | 144 | static const struct regulator_desc regulators[] = { |
80b022e2 JL |
145 | regulator_desc_esafeout(1), |
146 | regulator_desc_esafeout(2), | |
147 | { | |
148 | .name = "CHARGER", | |
149 | .id = MAX77693_CHARGER, | |
222d0f04 KK |
150 | .of_match = of_match_ptr("CHARGER"), |
151 | .regulators_node = of_match_ptr("regulators"), | |
80b022e2 JL |
152 | .ops = &max77693_charger_ops, |
153 | .type = REGULATOR_CURRENT, | |
154 | .owner = THIS_MODULE, | |
155 | .enable_reg = MAX77693_CHG_REG_CHG_CNFG_00, | |
156 | .enable_mask = CHG_CNFG_00_CHG_MASK | | |
157 | CHG_CNFG_00_BUCK_MASK, | |
158 | }, | |
159 | }; | |
160 | ||
80b022e2 JL |
161 | static int max77693_pmic_probe(struct platform_device *pdev) |
162 | { | |
163 | struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
222d0f04 | 164 | int i; |
ca0c37a0 | 165 | struct regulator_config config = { }; |
80b022e2 | 166 | |
222d0f04 | 167 | config.dev = iodev->dev; |
80b022e2 | 168 | config.regmap = iodev->regmap; |
80b022e2 | 169 | |
222d0f04 | 170 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
640c24a7 | 171 | struct regulator_dev *rdev; |
80b022e2 | 172 | |
640c24a7 | 173 | rdev = devm_regulator_register(&pdev->dev, |
222d0f04 | 174 | ®ulators[i], &config); |
640c24a7 KK |
175 | if (IS_ERR(rdev)) { |
176 | dev_err(&pdev->dev, | |
222d0f04 | 177 | "Failed to initialize regulator-%d\n", i); |
640c24a7 | 178 | return PTR_ERR(rdev); |
80b022e2 JL |
179 | } |
180 | } | |
181 | ||
80b022e2 JL |
182 | return 0; |
183 | } | |
184 | ||
185 | static const struct platform_device_id max77693_pmic_id[] = { | |
186 | {"max77693-pmic", 0}, | |
187 | {}, | |
188 | }; | |
189 | ||
190 | MODULE_DEVICE_TABLE(platform, max77693_pmic_id); | |
191 | ||
192 | static struct platform_driver max77693_pmic_driver = { | |
193 | .driver = { | |
194 | .name = "max77693-pmic", | |
80b022e2 JL |
195 | }, |
196 | .probe = max77693_pmic_probe, | |
80b022e2 JL |
197 | .id_table = max77693_pmic_id, |
198 | }; | |
199 | ||
200 | module_platform_driver(max77693_pmic_driver); | |
201 | ||
202 | MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver"); | |
203 | MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>"); | |
204 | MODULE_LICENSE("GPL"); |