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, \
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 .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,
73 .owner = THIS_MODULE,
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,
92 .owner = THIS_MODULE,
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
fan53880_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)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
158 #ifdef CONFIG_OF
159 static const struct of_device_id fan53880_dt_ids[] = {
160 { .compatible = "onnn,fan53880", },
161 {}
162 };
163 MODULE_DEVICE_TABLE(of, fan53880_dt_ids);
164 #endif
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");
185