Commit | Line | Data |
---|---|---|
8766018b HC |
1 | /* |
2 | * Copyright (c) 2015 MediaTek Inc. | |
3 | * Author: Henry Chen <henryc.chen@mediatek.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <linux/err.h> | |
16 | #include <linux/gpio.h> | |
17 | #include <linux/i2c.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/regmap.h> | |
22 | #include <linux/regulator/driver.h> | |
23 | #include <linux/regulator/machine.h> | |
24 | #include <linux/regulator/of_regulator.h> | |
25 | #include <linux/regulator/mt6311.h> | |
26 | #include <linux/slab.h> | |
27 | #include "mt6311-regulator.h" | |
28 | ||
29 | static const struct regmap_config mt6311_regmap_config = { | |
30 | .reg_bits = 8, | |
31 | .val_bits = 8, | |
32 | .max_register = MT6311_FQMTR_CON4, | |
47769cbc | 33 | .cache_type = REGCACHE_RBTREE, |
8766018b HC |
34 | }; |
35 | ||
36 | /* Default limits measured in millivolts and milliamps */ | |
37 | #define MT6311_MIN_UV 600000 | |
53e38162 | 38 | #define MT6311_MAX_UV 1393750 |
8766018b HC |
39 | #define MT6311_STEP_UV 6250 |
40 | ||
41 | static const struct regulator_linear_range buck_volt_range[] = { | |
42 | REGULATOR_LINEAR_RANGE(MT6311_MIN_UV, 0, 0x7f, MT6311_STEP_UV), | |
43 | }; | |
44 | ||
08b472f7 | 45 | static const struct regulator_ops mt6311_buck_ops = { |
8766018b HC |
46 | .list_voltage = regulator_list_voltage_linear_range, |
47 | .map_voltage = regulator_map_voltage_linear_range, | |
48 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
49 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
50 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
51 | .enable = regulator_enable_regmap, | |
52 | .disable = regulator_disable_regmap, | |
53 | .is_enabled = regulator_is_enabled_regmap, | |
54 | }; | |
55 | ||
08b472f7 | 56 | static const struct regulator_ops mt6311_ldo_ops = { |
8766018b HC |
57 | .enable = regulator_enable_regmap, |
58 | .disable = regulator_disable_regmap, | |
59 | .is_enabled = regulator_is_enabled_regmap, | |
60 | }; | |
61 | ||
62 | #define MT6311_BUCK(_id) \ | |
63 | {\ | |
64 | .name = #_id,\ | |
65 | .ops = &mt6311_buck_ops,\ | |
66 | .of_match = of_match_ptr(#_id),\ | |
67 | .regulators_node = of_match_ptr("regulators"),\ | |
68 | .type = REGULATOR_VOLTAGE,\ | |
69 | .id = MT6311_ID_##_id,\ | |
70 | .n_voltages = (MT6311_MAX_UV - MT6311_MIN_UV) / MT6311_STEP_UV + 1,\ | |
71 | .min_uV = MT6311_MIN_UV,\ | |
72 | .uV_step = MT6311_STEP_UV,\ | |
73 | .owner = THIS_MODULE,\ | |
74 | .linear_ranges = buck_volt_range, \ | |
75 | .n_linear_ranges = ARRAY_SIZE(buck_volt_range), \ | |
76 | .enable_reg = MT6311_VDVFS11_CON9,\ | |
77 | .enable_mask = MT6311_PMIC_VDVFS11_EN_MASK,\ | |
78 | .vsel_reg = MT6311_VDVFS11_CON12,\ | |
79 | .vsel_mask = MT6311_PMIC_VDVFS11_VOSEL_MASK,\ | |
80 | } | |
81 | ||
82 | #define MT6311_LDO(_id) \ | |
83 | {\ | |
84 | .name = #_id,\ | |
85 | .ops = &mt6311_ldo_ops,\ | |
86 | .of_match = of_match_ptr(#_id),\ | |
87 | .regulators_node = of_match_ptr("regulators"),\ | |
88 | .type = REGULATOR_VOLTAGE,\ | |
89 | .id = MT6311_ID_##_id,\ | |
90 | .owner = THIS_MODULE,\ | |
91 | .enable_reg = MT6311_LDO_CON3,\ | |
92 | .enable_mask = MT6311_PMIC_RG_VBIASN_EN_MASK,\ | |
93 | } | |
94 | ||
08b472f7 | 95 | static const struct regulator_desc mt6311_regulators[] = { |
8766018b HC |
96 | MT6311_BUCK(VDVFS), |
97 | MT6311_LDO(VBIASN), | |
98 | }; | |
99 | ||
100 | /* | |
101 | * I2C driver interface functions | |
102 | */ | |
103 | static int mt6311_i2c_probe(struct i2c_client *i2c, | |
104 | const struct i2c_device_id *id) | |
105 | { | |
106 | struct regulator_config config = { }; | |
107 | struct regulator_dev *rdev; | |
108 | struct regmap *regmap; | |
08b472f7 | 109 | int i, ret; |
8766018b HC |
110 | unsigned int data; |
111 | ||
112 | regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config); | |
113 | if (IS_ERR(regmap)) { | |
08b472f7 | 114 | ret = PTR_ERR(regmap); |
8766018b | 115 | dev_err(&i2c->dev, "Failed to allocate register map: %d\n", |
08b472f7 AL |
116 | ret); |
117 | return ret; | |
8766018b HC |
118 | } |
119 | ||
120 | ret = regmap_read(regmap, MT6311_SWCID, &data); | |
121 | if (ret < 0) { | |
122 | dev_err(&i2c->dev, "Failed to read DEVICE_ID reg: %d\n", ret); | |
123 | return ret; | |
124 | } | |
125 | ||
126 | switch (data) { | |
127 | case MT6311_E1_CID_CODE: | |
128 | case MT6311_E2_CID_CODE: | |
129 | case MT6311_E3_CID_CODE: | |
130 | break; | |
131 | default: | |
132 | dev_err(&i2c->dev, "Unsupported device id = 0x%x.\n", data); | |
133 | return -ENODEV; | |
134 | } | |
135 | ||
136 | for (i = 0; i < MT6311_MAX_REGULATORS; i++) { | |
137 | config.dev = &i2c->dev; | |
138 | config.regmap = regmap; | |
139 | ||
140 | rdev = devm_regulator_register(&i2c->dev, | |
141 | &mt6311_regulators[i], &config); | |
142 | if (IS_ERR(rdev)) { | |
143 | dev_err(&i2c->dev, | |
144 | "Failed to register MT6311 regulator\n"); | |
145 | return PTR_ERR(rdev); | |
146 | } | |
147 | } | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | static const struct i2c_device_id mt6311_i2c_id[] = { | |
153 | {"mt6311", 0}, | |
154 | {}, | |
155 | }; | |
156 | MODULE_DEVICE_TABLE(i2c, mt6311_i2c_id); | |
157 | ||
158 | #ifdef CONFIG_OF | |
159 | static const struct of_device_id mt6311_dt_ids[] = { | |
160 | { .compatible = "mediatek,mt6311-regulator", | |
161 | .data = &mt6311_i2c_id[0] }, | |
162 | {}, | |
163 | }; | |
164 | MODULE_DEVICE_TABLE(of, mt6311_dt_ids); | |
165 | #endif | |
166 | ||
167 | static struct i2c_driver mt6311_regulator_driver = { | |
168 | .driver = { | |
169 | .name = "mt6311", | |
8766018b HC |
170 | .of_match_table = of_match_ptr(mt6311_dt_ids), |
171 | }, | |
172 | .probe = mt6311_i2c_probe, | |
173 | .id_table = mt6311_i2c_id, | |
174 | }; | |
175 | ||
176 | module_i2c_driver(mt6311_regulator_driver); | |
177 | ||
178 | MODULE_AUTHOR("Henry Chen <henryc.chen@mediatek.com>"); | |
179 | MODULE_DESCRIPTION("Regulator device driver for Mediatek MT6311"); | |
180 | MODULE_LICENSE("GPL v2"); |