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dec38b5c MB |
1 | /* |
2 | * isl9305 - Intersil ISL9305 DCDC regulator | |
3 | * | |
4 | * Copyright 2014 Linaro Ltd | |
5 | * | |
6 | * Author: Mark Brown <broonie@kernel.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/err.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/of.h> | |
18 | #include <linux/platform_data/isl9305.h> | |
19 | #include <linux/regmap.h> | |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/regulator/of_regulator.h> | |
22 | #include <linux/slab.h> | |
23 | ||
24 | /* | |
25 | * Registers | |
26 | */ | |
27 | #define ISL9305_DCD1OUT 0x0 | |
28 | #define ISL9305_DCD2OUT 0x1 | |
29 | #define ISL9305_LDO1OUT 0x2 | |
30 | #define ISL9305_LDO2OUT 0x3 | |
31 | #define ISL9305_DCD_PARAMETER 0x4 | |
32 | #define ISL9305_SYSTEM_PARAMETER 0x5 | |
33 | #define ISL9305_DCD_SRCTL 0x6 | |
34 | ||
35 | #define ISL9305_MAX_REG ISL9305_DCD_SRCTL | |
36 | ||
37 | /* | |
38 | * DCD_PARAMETER | |
39 | */ | |
40 | #define ISL9305_DCD_PHASE 0x40 | |
41 | #define ISL9305_DCD2_ULTRA 0x20 | |
42 | #define ISL9305_DCD1_ULTRA 0x10 | |
43 | #define ISL9305_DCD2_BLD 0x08 | |
44 | #define ISL9305_DCD1_BLD 0x04 | |
45 | #define ISL9305_DCD2_MODE 0x02 | |
46 | #define ISL9305_DCD1_MODE 0x01 | |
47 | ||
48 | /* | |
49 | * SYSTEM_PARAMETER | |
50 | */ | |
51 | #define ISL9305_I2C_EN 0x40 | |
52 | #define ISL9305_DCDPOR_MASK 0x30 | |
53 | #define ISL9305_LDO2_EN 0x08 | |
54 | #define ISL9305_LDO1_EN 0x04 | |
55 | #define ISL9305_DCD2_EN 0x02 | |
56 | #define ISL9305_DCD1_EN 0x01 | |
57 | ||
58 | /* | |
59 | * DCD_SRCTL | |
60 | */ | |
61 | #define ISL9305_DCD2SR_MASK 0xc0 | |
62 | #define ISL9305_DCD1SR_MASK 0x07 | |
63 | ||
64 | static const struct regulator_ops isl9305_ops = { | |
65 | .enable = regulator_enable_regmap, | |
66 | .disable = regulator_disable_regmap, | |
67 | .is_enabled = regulator_is_enabled_regmap, | |
68 | .list_voltage = regulator_list_voltage_linear, | |
69 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
70 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
71 | }; | |
72 | ||
73 | static const struct regulator_desc isl9305_regulators[] = { | |
74 | [ISL9305_DCD1] = { | |
75 | .name = "DCD1", | |
93a127b1 MB |
76 | .of_match = of_match_ptr("dcd1"), |
77 | .regulators_node = of_match_ptr("regulators"), | |
dec38b5c MB |
78 | .n_voltages = 0x70, |
79 | .min_uV = 825000, | |
80 | .uV_step = 25000, | |
81 | .vsel_reg = ISL9305_DCD1OUT, | |
82 | .vsel_mask = 0x7f, | |
83 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
84 | .enable_mask = ISL9305_DCD1_EN, | |
85 | .supply_name = "VINDCD1", | |
86 | .ops = &isl9305_ops, | |
46942b21 | 87 | .owner = THIS_MODULE, |
dec38b5c MB |
88 | }, |
89 | [ISL9305_DCD2] = { | |
90 | .name = "DCD2", | |
93a127b1 MB |
91 | .of_match = of_match_ptr("dcd2"), |
92 | .regulators_node = of_match_ptr("regulators"), | |
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93 | .n_voltages = 0x70, |
94 | .min_uV = 825000, | |
95 | .uV_step = 25000, | |
96 | .vsel_reg = ISL9305_DCD2OUT, | |
97 | .vsel_mask = 0x7f, | |
98 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
99 | .enable_mask = ISL9305_DCD2_EN, | |
100 | .supply_name = "VINDCD2", | |
101 | .ops = &isl9305_ops, | |
46942b21 | 102 | .owner = THIS_MODULE, |
dec38b5c MB |
103 | }, |
104 | [ISL9305_LDO1] = { | |
105 | .name = "LDO1", | |
93a127b1 MB |
106 | .of_match = of_match_ptr("ldo1"), |
107 | .regulators_node = of_match_ptr("regulators"), | |
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108 | .n_voltages = 0x37, |
109 | .min_uV = 900000, | |
110 | .uV_step = 50000, | |
111 | .vsel_reg = ISL9305_LDO1OUT, | |
112 | .vsel_mask = 0x3f, | |
113 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
114 | .enable_mask = ISL9305_LDO1_EN, | |
115 | .supply_name = "VINLDO1", | |
116 | .ops = &isl9305_ops, | |
46942b21 | 117 | .owner = THIS_MODULE, |
dec38b5c MB |
118 | }, |
119 | [ISL9305_LDO2] = { | |
120 | .name = "LDO2", | |
93a127b1 MB |
121 | .of_match = of_match_ptr("ldo2"), |
122 | .regulators_node = of_match_ptr("regulators"), | |
dec38b5c MB |
123 | .n_voltages = 0x37, |
124 | .min_uV = 900000, | |
125 | .uV_step = 50000, | |
126 | .vsel_reg = ISL9305_LDO2OUT, | |
127 | .vsel_mask = 0x3f, | |
128 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
129 | .enable_mask = ISL9305_LDO2_EN, | |
130 | .supply_name = "VINLDO2", | |
131 | .ops = &isl9305_ops, | |
46942b21 | 132 | .owner = THIS_MODULE, |
dec38b5c MB |
133 | }, |
134 | }; | |
135 | ||
dec38b5c MB |
136 | static const struct regmap_config isl9305_regmap = { |
137 | .reg_bits = 8, | |
138 | .val_bits = 8, | |
139 | ||
140 | .max_register = ISL9305_MAX_REG, | |
141 | .cache_type = REGCACHE_RBTREE, | |
142 | }; | |
143 | ||
144 | static int isl9305_i2c_probe(struct i2c_client *i2c, | |
145 | const struct i2c_device_id *id) | |
146 | { | |
147 | struct regulator_config config = { }; | |
148 | struct isl9305_pdata *pdata = i2c->dev.platform_data; | |
dec38b5c MB |
149 | struct regulator_dev *rdev; |
150 | struct regmap *regmap; | |
151 | int i, ret; | |
152 | ||
dec38b5c MB |
153 | regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap); |
154 | if (IS_ERR(regmap)) { | |
155 | ret = PTR_ERR(regmap); | |
156 | dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret); | |
157 | return ret; | |
158 | } | |
159 | ||
160 | config.dev = &i2c->dev; | |
161 | ||
162 | for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) { | |
93a127b1 | 163 | if (pdata) |
dec38b5c | 164 | config.init_data = pdata->init_data[i]; |
93a127b1 MB |
165 | else |
166 | config.init_data = NULL; | |
dec38b5c MB |
167 | |
168 | rdev = devm_regulator_register(&i2c->dev, | |
169 | &isl9305_regulators[i], | |
170 | &config); | |
171 | if (IS_ERR(rdev)) { | |
172 | ret = PTR_ERR(rdev); | |
173 | dev_err(&i2c->dev, "Failed to register %s: %d\n", | |
174 | isl9305_regulators[i].name, ret); | |
175 | return ret; | |
176 | } | |
177 | } | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | #ifdef CONFIG_OF | |
183 | static const struct of_device_id isl9305_dt_ids[] = { | |
6fd75357 AE |
184 | { .compatible = "isl,isl9305" }, /* for backward compat., don't use */ |
185 | { .compatible = "isil,isl9305" }, | |
186 | { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */ | |
187 | { .compatible = "isil,isl9305h" }, | |
dec38b5c MB |
188 | {}, |
189 | }; | |
5b87af4c | 190 | MODULE_DEVICE_TABLE(of, isl9305_dt_ids); |
dec38b5c MB |
191 | #endif |
192 | ||
193 | static const struct i2c_device_id isl9305_i2c_id[] = { | |
194 | { "isl9305", }, | |
195 | { "isl9305h", }, | |
196 | { } | |
197 | }; | |
198 | MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id); | |
199 | ||
200 | static struct i2c_driver isl9305_regulator_driver = { | |
201 | .driver = { | |
202 | .name = "isl9305", | |
dec38b5c MB |
203 | .of_match_table = of_match_ptr(isl9305_dt_ids), |
204 | }, | |
205 | .probe = isl9305_i2c_probe, | |
206 | .id_table = isl9305_i2c_id, | |
207 | }; | |
208 | ||
209 | module_i2c_driver(isl9305_regulator_driver); | |
210 | ||
211 | MODULE_AUTHOR("Mark Brown"); | |
212 | MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator"); | |
213 | MODULE_LICENSE("GPL"); |