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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
dec38b5c MB |
2 | /* |
3 | * isl9305 - Intersil ISL9305 DCDC regulator | |
4 | * | |
5 | * Copyright 2014 Linaro Ltd | |
6 | * | |
7 | * Author: Mark Brown <broonie@kernel.org> | |
dec38b5c MB |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/err.h> | |
12 | #include <linux/i2c.h> | |
13 | #include <linux/of.h> | |
14 | #include <linux/platform_data/isl9305.h> | |
15 | #include <linux/regmap.h> | |
16 | #include <linux/regulator/driver.h> | |
17 | #include <linux/regulator/of_regulator.h> | |
18 | #include <linux/slab.h> | |
19 | ||
20 | /* | |
21 | * Registers | |
22 | */ | |
23 | #define ISL9305_DCD1OUT 0x0 | |
24 | #define ISL9305_DCD2OUT 0x1 | |
25 | #define ISL9305_LDO1OUT 0x2 | |
26 | #define ISL9305_LDO2OUT 0x3 | |
27 | #define ISL9305_DCD_PARAMETER 0x4 | |
28 | #define ISL9305_SYSTEM_PARAMETER 0x5 | |
29 | #define ISL9305_DCD_SRCTL 0x6 | |
30 | ||
31 | #define ISL9305_MAX_REG ISL9305_DCD_SRCTL | |
32 | ||
33 | /* | |
34 | * DCD_PARAMETER | |
35 | */ | |
36 | #define ISL9305_DCD_PHASE 0x40 | |
37 | #define ISL9305_DCD2_ULTRA 0x20 | |
38 | #define ISL9305_DCD1_ULTRA 0x10 | |
39 | #define ISL9305_DCD2_BLD 0x08 | |
40 | #define ISL9305_DCD1_BLD 0x04 | |
41 | #define ISL9305_DCD2_MODE 0x02 | |
42 | #define ISL9305_DCD1_MODE 0x01 | |
43 | ||
44 | /* | |
45 | * SYSTEM_PARAMETER | |
46 | */ | |
47 | #define ISL9305_I2C_EN 0x40 | |
48 | #define ISL9305_DCDPOR_MASK 0x30 | |
49 | #define ISL9305_LDO2_EN 0x08 | |
50 | #define ISL9305_LDO1_EN 0x04 | |
51 | #define ISL9305_DCD2_EN 0x02 | |
52 | #define ISL9305_DCD1_EN 0x01 | |
53 | ||
54 | /* | |
55 | * DCD_SRCTL | |
56 | */ | |
57 | #define ISL9305_DCD2SR_MASK 0xc0 | |
58 | #define ISL9305_DCD1SR_MASK 0x07 | |
59 | ||
60 | static const struct regulator_ops isl9305_ops = { | |
61 | .enable = regulator_enable_regmap, | |
62 | .disable = regulator_disable_regmap, | |
63 | .is_enabled = regulator_is_enabled_regmap, | |
64 | .list_voltage = regulator_list_voltage_linear, | |
65 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
66 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
67 | }; | |
68 | ||
69 | static const struct regulator_desc isl9305_regulators[] = { | |
70 | [ISL9305_DCD1] = { | |
71 | .name = "DCD1", | |
93a127b1 MB |
72 | .of_match = of_match_ptr("dcd1"), |
73 | .regulators_node = of_match_ptr("regulators"), | |
dec38b5c MB |
74 | .n_voltages = 0x70, |
75 | .min_uV = 825000, | |
76 | .uV_step = 25000, | |
77 | .vsel_reg = ISL9305_DCD1OUT, | |
78 | .vsel_mask = 0x7f, | |
79 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
80 | .enable_mask = ISL9305_DCD1_EN, | |
81 | .supply_name = "VINDCD1", | |
82 | .ops = &isl9305_ops, | |
46942b21 | 83 | .owner = THIS_MODULE, |
dec38b5c MB |
84 | }, |
85 | [ISL9305_DCD2] = { | |
86 | .name = "DCD2", | |
93a127b1 MB |
87 | .of_match = of_match_ptr("dcd2"), |
88 | .regulators_node = of_match_ptr("regulators"), | |
dec38b5c MB |
89 | .n_voltages = 0x70, |
90 | .min_uV = 825000, | |
91 | .uV_step = 25000, | |
92 | .vsel_reg = ISL9305_DCD2OUT, | |
93 | .vsel_mask = 0x7f, | |
94 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
95 | .enable_mask = ISL9305_DCD2_EN, | |
96 | .supply_name = "VINDCD2", | |
97 | .ops = &isl9305_ops, | |
46942b21 | 98 | .owner = THIS_MODULE, |
dec38b5c MB |
99 | }, |
100 | [ISL9305_LDO1] = { | |
101 | .name = "LDO1", | |
93a127b1 MB |
102 | .of_match = of_match_ptr("ldo1"), |
103 | .regulators_node = of_match_ptr("regulators"), | |
dec38b5c MB |
104 | .n_voltages = 0x37, |
105 | .min_uV = 900000, | |
106 | .uV_step = 50000, | |
107 | .vsel_reg = ISL9305_LDO1OUT, | |
108 | .vsel_mask = 0x3f, | |
109 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
110 | .enable_mask = ISL9305_LDO1_EN, | |
111 | .supply_name = "VINLDO1", | |
112 | .ops = &isl9305_ops, | |
46942b21 | 113 | .owner = THIS_MODULE, |
dec38b5c MB |
114 | }, |
115 | [ISL9305_LDO2] = { | |
116 | .name = "LDO2", | |
93a127b1 MB |
117 | .of_match = of_match_ptr("ldo2"), |
118 | .regulators_node = of_match_ptr("regulators"), | |
dec38b5c MB |
119 | .n_voltages = 0x37, |
120 | .min_uV = 900000, | |
121 | .uV_step = 50000, | |
122 | .vsel_reg = ISL9305_LDO2OUT, | |
123 | .vsel_mask = 0x3f, | |
124 | .enable_reg = ISL9305_SYSTEM_PARAMETER, | |
125 | .enable_mask = ISL9305_LDO2_EN, | |
126 | .supply_name = "VINLDO2", | |
127 | .ops = &isl9305_ops, | |
46942b21 | 128 | .owner = THIS_MODULE, |
dec38b5c MB |
129 | }, |
130 | }; | |
131 | ||
dec38b5c MB |
132 | static const struct regmap_config isl9305_regmap = { |
133 | .reg_bits = 8, | |
134 | .val_bits = 8, | |
135 | ||
136 | .max_register = ISL9305_MAX_REG, | |
137 | .cache_type = REGCACHE_RBTREE, | |
138 | }; | |
139 | ||
77e29598 | 140 | static int isl9305_i2c_probe(struct i2c_client *i2c) |
dec38b5c MB |
141 | { |
142 | struct regulator_config config = { }; | |
143 | struct isl9305_pdata *pdata = i2c->dev.platform_data; | |
dec38b5c MB |
144 | struct regulator_dev *rdev; |
145 | struct regmap *regmap; | |
146 | int i, ret; | |
147 | ||
dec38b5c MB |
148 | regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap); |
149 | if (IS_ERR(regmap)) { | |
150 | ret = PTR_ERR(regmap); | |
151 | dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret); | |
152 | return ret; | |
153 | } | |
154 | ||
155 | config.dev = &i2c->dev; | |
156 | ||
157 | for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) { | |
93a127b1 | 158 | if (pdata) |
dec38b5c | 159 | config.init_data = pdata->init_data[i]; |
93a127b1 MB |
160 | else |
161 | config.init_data = NULL; | |
dec38b5c MB |
162 | |
163 | rdev = devm_regulator_register(&i2c->dev, | |
164 | &isl9305_regulators[i], | |
165 | &config); | |
166 | if (IS_ERR(rdev)) { | |
167 | ret = PTR_ERR(rdev); | |
168 | dev_err(&i2c->dev, "Failed to register %s: %d\n", | |
169 | isl9305_regulators[i].name, ret); | |
170 | return ret; | |
171 | } | |
172 | } | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | #ifdef CONFIG_OF | |
178 | static const struct of_device_id isl9305_dt_ids[] = { | |
6fd75357 AE |
179 | { .compatible = "isl,isl9305" }, /* for backward compat., don't use */ |
180 | { .compatible = "isil,isl9305" }, | |
181 | { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */ | |
182 | { .compatible = "isil,isl9305h" }, | |
dec38b5c MB |
183 | {}, |
184 | }; | |
5b87af4c | 185 | MODULE_DEVICE_TABLE(of, isl9305_dt_ids); |
dec38b5c MB |
186 | #endif |
187 | ||
188 | static const struct i2c_device_id isl9305_i2c_id[] = { | |
189 | { "isl9305", }, | |
190 | { "isl9305h", }, | |
191 | { } | |
192 | }; | |
193 | MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id); | |
194 | ||
195 | static struct i2c_driver isl9305_regulator_driver = { | |
196 | .driver = { | |
197 | .name = "isl9305", | |
dec38b5c MB |
198 | .of_match_table = of_match_ptr(isl9305_dt_ids), |
199 | }, | |
77e29598 | 200 | .probe_new = isl9305_i2c_probe, |
dec38b5c MB |
201 | .id_table = isl9305_i2c_id, |
202 | }; | |
203 | ||
204 | module_i2c_driver(isl9305_regulator_driver); | |
205 | ||
206 | MODULE_AUTHOR("Mark Brown"); | |
207 | MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator"); | |
208 | MODULE_LICENSE("GPL"); |