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1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | #include <linux/module.h> | |
3 | #include <linux/i2c.h> | |
4 | #include <linux/regmap.h> | |
5 | #include <linux/regulator/driver.h> | |
6 | ||
7 | enum fan53880_regulator_ids { | |
8 | FAN53880_LDO1, | |
9 | FAN53880_LDO2, | |
10 | FAN53880_LDO3, | |
11 | FAN53880_LDO4, | |
12 | FAN53880_BUCK, | |
13 | FAN53880_BOOST, | |
14 | }; | |
15 | ||
16 | enum fan53880_registers { | |
17 | FAN53880_PRODUCT_ID = 0x00, | |
18 | FAN53880_SILICON_REV, | |
19 | FAN53880_BUCKVOUT, | |
20 | FAN53880_BOOSTVOUT, | |
21 | FAN53880_LDO1VOUT, | |
22 | FAN53880_LDO2VOUT, | |
23 | FAN53880_LDO3VOUT, | |
24 | FAN53880_LDO4VOUT, | |
25 | FAN53880_IOUT, | |
26 | FAN53880_ENABLE, | |
27 | FAN53880_ENABLE_BOOST, | |
28 | }; | |
29 | ||
30 | #define FAN53880_ID 0x01 | |
31 | ||
32 | static const struct regulator_ops fan53880_ops = { | |
33 | .list_voltage = regulator_list_voltage_linear_range, | |
34 | .map_voltage = regulator_map_voltage_linear_range, | |
35 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
36 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
37 | .enable = regulator_enable_regmap, | |
38 | .disable = regulator_disable_regmap, | |
39 | .is_enabled = regulator_is_enabled_regmap, | |
40 | }; | |
41 | ||
42 | #define FAN53880_LDO(_num, _supply, _default) \ | |
43 | [FAN53880_LDO ## _num] = { \ | |
44 | .name = "LDO"#_num, \ | |
45 | .of_match = of_match_ptr("LDO"#_num), \ | |
46 | .regulators_node = of_match_ptr("regulators"), \ | |
47 | .type = REGULATOR_VOLTAGE, \ | |
6c814b67 | 48 | .owner = THIS_MODULE, \ |
e6dea51e CF |
49 | .linear_ranges = (struct linear_range[]) { \ |
50 | REGULATOR_LINEAR_RANGE(_default, 0x0, 0x0, 0), \ | |
51 | REGULATOR_LINEAR_RANGE(800000, 0xf, 0x73, 25000), \ | |
52 | }, \ | |
53 | .n_linear_ranges = 2, \ | |
54 | .vsel_reg = FAN53880_LDO ## _num ## VOUT, \ | |
55 | .vsel_mask = 0x7f, \ | |
56 | .enable_reg = FAN53880_ENABLE, \ | |
57 | .enable_mask = BIT(_num - 1), \ | |
58 | .enable_time = 150, \ | |
59 | .supply_name = _supply, \ | |
60 | .ops = &fan53880_ops, \ | |
61 | } | |
62 | ||
63 | static const struct regulator_desc fan53880_regulators[] = { | |
64 | FAN53880_LDO(1, "VIN12", 2800000), | |
65 | FAN53880_LDO(2, "VIN12", 2800000), | |
66 | FAN53880_LDO(3, "VIN3", 1800000), | |
67 | FAN53880_LDO(4, "VIN4", 1800000), | |
68 | [FAN53880_BUCK] = { | |
69 | .name = "BUCK", | |
70 | .of_match = of_match_ptr("BUCK"), | |
71 | .regulators_node = of_match_ptr("regulators"), | |
72 | .type = REGULATOR_VOLTAGE, | |
6c814b67 | 73 | .owner = THIS_MODULE, |
e6dea51e CF |
74 | .linear_ranges = (struct linear_range[]) { |
75 | REGULATOR_LINEAR_RANGE(1100000, 0x0, 0x0, 0), | |
76 | REGULATOR_LINEAR_RANGE(600000, 0x1f, 0xf7, 12500), | |
77 | }, | |
78 | .n_linear_ranges = 2, | |
79 | .vsel_reg = FAN53880_BUCKVOUT, | |
80 | .vsel_mask = 0x7f, | |
81 | .enable_reg = FAN53880_ENABLE, | |
82 | .enable_mask = 0x10, | |
83 | .enable_time = 480, | |
84 | .supply_name = "PVIN", | |
85 | .ops = &fan53880_ops, | |
86 | }, | |
87 | [FAN53880_BOOST] = { | |
88 | .name = "BOOST", | |
89 | .of_match = of_match_ptr("BOOST"), | |
90 | .regulators_node = of_match_ptr("regulators"), | |
91 | .type = REGULATOR_VOLTAGE, | |
6c814b67 | 92 | .owner = THIS_MODULE, |
e6dea51e CF |
93 | .linear_ranges = (struct linear_range[]) { |
94 | REGULATOR_LINEAR_RANGE(5000000, 0x0, 0x0, 0), | |
95 | REGULATOR_LINEAR_RANGE(3000000, 0x4, 0x70, 25000), | |
96 | }, | |
97 | .n_linear_ranges = 2, | |
98 | .vsel_reg = FAN53880_BOOSTVOUT, | |
99 | .vsel_mask = 0x7f, | |
100 | .enable_reg = FAN53880_ENABLE_BOOST, | |
101 | .enable_mask = 0xff, | |
102 | .enable_time = 580, | |
103 | .supply_name = "PVIN", | |
104 | .ops = &fan53880_ops, | |
105 | }, | |
106 | }; | |
107 | ||
108 | static const struct regmap_config fan53880_regmap = { | |
109 | .reg_bits = 8, | |
110 | .val_bits = 8, | |
111 | .max_register = FAN53880_ENABLE_BOOST, | |
112 | }; | |
113 | ||
114 | static int fan53880_i2c_probe(struct i2c_client *i2c, | |
115 | const struct i2c_device_id *id) | |
116 | { | |
117 | struct regulator_config config = { }; | |
118 | struct regulator_dev *rdev; | |
119 | struct regmap *regmap; | |
120 | int i, ret; | |
121 | unsigned int data; | |
122 | ||
123 | regmap = devm_regmap_init_i2c(i2c, &fan53880_regmap); | |
124 | if (IS_ERR(regmap)) { | |
125 | ret = PTR_ERR(regmap); | |
126 | dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret); | |
127 | return ret; | |
128 | } | |
129 | ||
130 | ret = regmap_read(regmap, FAN53880_PRODUCT_ID, &data); | |
131 | if (ret < 0) { | |
132 | dev_err(&i2c->dev, "Failed to read PRODUCT_ID: %d\n", ret); | |
133 | return ret; | |
134 | } | |
135 | if (data != FAN53880_ID) { | |
136 | dev_err(&i2c->dev, "Unsupported device id: 0x%x.\n", data); | |
137 | return -ENODEV; | |
138 | } | |
139 | ||
140 | config.dev = &i2c->dev; | |
141 | config.init_data = NULL; | |
142 | ||
143 | for (i = 0; i < ARRAY_SIZE(fan53880_regulators); i++) { | |
144 | rdev = devm_regulator_register(&i2c->dev, | |
145 | &fan53880_regulators[i], | |
146 | &config); | |
147 | if (IS_ERR(rdev)) { | |
148 | ret = PTR_ERR(rdev); | |
149 | dev_err(&i2c->dev, "Failed to register %s: %d\n", | |
150 | fan53880_regulators[i].name, ret); | |
151 | return ret; | |
152 | } | |
153 | } | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
318b8a09 | 158 | #ifdef CONFIG_OF |
e6dea51e CF |
159 | static const struct of_device_id fan53880_dt_ids[] = { |
160 | { .compatible = "onnn,fan53880", }, | |
161 | {} | |
162 | }; | |
163 | MODULE_DEVICE_TABLE(of, fan53880_dt_ids); | |
318b8a09 | 164 | #endif |
e6dea51e CF |
165 | |
166 | static const struct i2c_device_id fan53880_i2c_id[] = { | |
167 | { "fan53880", }, | |
168 | {} | |
169 | }; | |
170 | MODULE_DEVICE_TABLE(i2c, fan53880_i2c_id); | |
171 | ||
172 | static struct i2c_driver fan53880_regulator_driver = { | |
173 | .driver = { | |
174 | .name = "fan53880", | |
175 | .of_match_table = of_match_ptr(fan53880_dt_ids), | |
176 | }, | |
177 | .probe = fan53880_i2c_probe, | |
178 | .id_table = fan53880_i2c_id, | |
179 | }; | |
180 | module_i2c_driver(fan53880_regulator_driver); | |
181 | ||
182 | MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver"); | |
183 | MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>"); | |
184 | MODULE_LICENSE("GPL"); |