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 = "LDO"#_num, \ |
46 | .regulators_node = "regulators", \ |
47 | .type = REGULATOR_VOLTAGE, \ |
48 | .owner = THIS_MODULE, \ |
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 | .n_voltages = 0x74, \ |
55 | .vsel_reg = FAN53880_LDO ## _num ## VOUT, \ |
56 | .vsel_mask = 0x7f, \ |
57 | .enable_reg = FAN53880_ENABLE, \ |
58 | .enable_mask = BIT(_num - 1), \ |
59 | .enable_time = 150, \ |
60 | .supply_name = _supply, \ |
61 | .ops = &fan53880_ops, \ |
62 | } |
63 | |
64 | static const struct regulator_desc fan53880_regulators[] = { |
65 | FAN53880_LDO(1, "VIN12" , 2800000), |
66 | FAN53880_LDO(2, "VIN12" , 2800000), |
67 | FAN53880_LDO(3, "VIN3" , 1800000), |
68 | FAN53880_LDO(4, "VIN4" , 1800000), |
69 | [FAN53880_BUCK] = { |
70 | .name = "BUCK" , |
71 | .of_match = "BUCK" , |
72 | .regulators_node = "regulators" , |
73 | .type = REGULATOR_VOLTAGE, |
74 | .owner = THIS_MODULE, |
75 | .linear_ranges = (struct linear_range[]) { |
76 | REGULATOR_LINEAR_RANGE(1100000, 0x0, 0x0, 0), |
77 | REGULATOR_LINEAR_RANGE(600000, 0x1f, 0xf7, 12500), |
78 | }, |
79 | .n_linear_ranges = 2, |
80 | .n_voltages = 0xf8, |
81 | .vsel_reg = FAN53880_BUCKVOUT, |
82 | .vsel_mask = 0xff, |
83 | .enable_reg = FAN53880_ENABLE, |
84 | .enable_mask = 0x10, |
85 | .enable_time = 480, |
86 | .supply_name = "PVIN" , |
87 | .ops = &fan53880_ops, |
88 | }, |
89 | [FAN53880_BOOST] = { |
90 | .name = "BOOST" , |
91 | .of_match = "BOOST" , |
92 | .regulators_node = "regulators" , |
93 | .type = REGULATOR_VOLTAGE, |
94 | .owner = THIS_MODULE, |
95 | .linear_ranges = (struct linear_range[]) { |
96 | REGULATOR_LINEAR_RANGE(5000000, 0x0, 0x0, 0), |
97 | REGULATOR_LINEAR_RANGE(3000000, 0x4, 0x70, 25000), |
98 | }, |
99 | .n_linear_ranges = 2, |
100 | .n_voltages = 0x71, |
101 | .vsel_reg = FAN53880_BOOSTVOUT, |
102 | .vsel_mask = 0x7f, |
103 | .enable_reg = FAN53880_ENABLE_BOOST, |
104 | .enable_mask = 0xff, |
105 | .enable_time = 580, |
106 | .supply_name = "PVIN" , |
107 | .ops = &fan53880_ops, |
108 | }, |
109 | }; |
110 | |
111 | static const struct regmap_config fan53880_regmap = { |
112 | .reg_bits = 8, |
113 | .val_bits = 8, |
114 | .max_register = FAN53880_ENABLE_BOOST, |
115 | }; |
116 | |
117 | static int fan53880_i2c_probe(struct i2c_client *i2c) |
118 | { |
119 | struct regulator_config config = { }; |
120 | struct regulator_dev *rdev; |
121 | struct regmap *regmap; |
122 | int i, ret; |
123 | unsigned int data; |
124 | |
125 | regmap = devm_regmap_init_i2c(i2c, &fan53880_regmap); |
126 | if (IS_ERR(ptr: regmap)) { |
127 | ret = PTR_ERR(ptr: regmap); |
128 | dev_err(&i2c->dev, "Failed to create regmap: %d\n" , ret); |
129 | return ret; |
130 | } |
131 | |
132 | ret = regmap_read(map: regmap, reg: FAN53880_PRODUCT_ID, val: &data); |
133 | if (ret < 0) { |
134 | dev_err(&i2c->dev, "Failed to read PRODUCT_ID: %d\n" , ret); |
135 | return ret; |
136 | } |
137 | if (data != FAN53880_ID) { |
138 | dev_err(&i2c->dev, "Unsupported device id: 0x%x.\n" , data); |
139 | return -ENODEV; |
140 | } |
141 | |
142 | config.dev = &i2c->dev; |
143 | config.init_data = NULL; |
144 | |
145 | for (i = 0; i < ARRAY_SIZE(fan53880_regulators); i++) { |
146 | rdev = devm_regulator_register(dev: &i2c->dev, |
147 | regulator_desc: &fan53880_regulators[i], |
148 | config: &config); |
149 | if (IS_ERR(ptr: rdev)) { |
150 | ret = PTR_ERR(ptr: rdev); |
151 | dev_err(&i2c->dev, "Failed to register %s: %d\n" , |
152 | fan53880_regulators[i].name, ret); |
153 | return ret; |
154 | } |
155 | } |
156 | |
157 | return 0; |
158 | } |
159 | |
160 | static const struct of_device_id fan53880_dt_ids[] = { |
161 | { .compatible = "onnn,fan53880" , }, |
162 | {} |
163 | }; |
164 | MODULE_DEVICE_TABLE(of, fan53880_dt_ids); |
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 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
176 | .of_match_table = fan53880_dt_ids, |
177 | }, |
178 | .probe = fan53880_i2c_probe, |
179 | .id_table = fan53880_i2c_id, |
180 | }; |
181 | module_i2c_driver(fan53880_regulator_driver); |
182 | |
183 | MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver" ); |
184 | MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>" ); |
185 | MODULE_LICENSE("GPL" ); |
186 | |