1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * isl9305 - Intersil ISL9305 DCDC regulator |
4 | * |
5 | * Copyright 2014 Linaro Ltd |
6 | * |
7 | * Author: Mark Brown <broonie@kernel.org> |
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" , |
72 | .of_match = of_match_ptr("dcd1" ), |
73 | .regulators_node = of_match_ptr("regulators" ), |
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, |
83 | .owner = THIS_MODULE, |
84 | }, |
85 | [ISL9305_DCD2] = { |
86 | .name = "DCD2" , |
87 | .of_match = of_match_ptr("dcd2" ), |
88 | .regulators_node = of_match_ptr("regulators" ), |
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, |
98 | .owner = THIS_MODULE, |
99 | }, |
100 | [ISL9305_LDO1] = { |
101 | .name = "LDO1" , |
102 | .of_match = of_match_ptr("ldo1" ), |
103 | .regulators_node = of_match_ptr("regulators" ), |
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, |
113 | .owner = THIS_MODULE, |
114 | }, |
115 | [ISL9305_LDO2] = { |
116 | .name = "LDO2" , |
117 | .of_match = of_match_ptr("ldo2" ), |
118 | .regulators_node = of_match_ptr("regulators" ), |
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, |
128 | .owner = THIS_MODULE, |
129 | }, |
130 | }; |
131 | |
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 | |
140 | static int isl9305_i2c_probe(struct i2c_client *i2c) |
141 | { |
142 | struct regulator_config config = { }; |
143 | struct isl9305_pdata *pdata = i2c->dev.platform_data; |
144 | struct regulator_dev *rdev; |
145 | struct regmap *regmap; |
146 | int i, ret; |
147 | |
148 | regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap); |
149 | if (IS_ERR(ptr: regmap)) { |
150 | ret = PTR_ERR(ptr: 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++) { |
158 | if (pdata) |
159 | config.init_data = pdata->init_data[i]; |
160 | else |
161 | config.init_data = NULL; |
162 | |
163 | rdev = devm_regulator_register(dev: &i2c->dev, |
164 | regulator_desc: &isl9305_regulators[i], |
165 | config: &config); |
166 | if (IS_ERR(ptr: rdev)) { |
167 | ret = PTR_ERR(ptr: 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[] = { |
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" }, |
183 | {}, |
184 | }; |
185 | MODULE_DEVICE_TABLE(of, isl9305_dt_ids); |
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" , |
198 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
199 | .of_match_table = of_match_ptr(isl9305_dt_ids), |
200 | }, |
201 | .probe = isl9305_i2c_probe, |
202 | .id_table = isl9305_i2c_id, |
203 | }; |
204 | |
205 | module_i2c_driver(isl9305_regulator_driver); |
206 | |
207 | MODULE_AUTHOR("Mark Brown" ); |
208 | MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator" ); |
209 | MODULE_LICENSE("GPL" ); |
210 | |