1
2#include <linux/module.h>
3#include <linux/i2c.h>
4#include <linux/regmap.h>
5#include <linux/regulator/driver.h>
6
7enum fan53880_regulator_ids {
8 FAN53880_LDO1,
9 FAN53880_LDO2,
10 FAN53880_LDO3,
11 FAN53880_LDO4,
12 FAN53880_BUCK,
13 FAN53880_BOOST,
14};
15
16enum 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
32static 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 .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
64static 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 = of_match_ptr("BUCK"),
72 .regulators_node = of_match_ptr("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 = of_match_ptr("BOOST"),
92 .regulators_node = of_match_ptr("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
111static const struct regmap_config fan53880_regmap = {
112 .reg_bits = 8,
113 .val_bits = 8,
114 .max_register = FAN53880_ENABLE_BOOST,
115};
116
117static 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(regmap)) {
127 ret = PTR_ERR(regmap);
128 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
129 return ret;
130 }
131
132 ret = regmap_read(regmap, FAN53880_PRODUCT_ID, &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(&i2c->dev,
147 &fan53880_regulators[i],
148 &config);
149 if (IS_ERR(rdev)) {
150 ret = PTR_ERR(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#ifdef CONFIG_OF
161static const struct of_device_id fan53880_dt_ids[] = {
162 { .compatible = "onnn,fan53880", },
163 {}
164};
165MODULE_DEVICE_TABLE(of, fan53880_dt_ids);
166#endif
167
168static const struct i2c_device_id fan53880_i2c_id[] = {
169 { "fan53880", },
170 {}
171};
172MODULE_DEVICE_TABLE(i2c, fan53880_i2c_id);
173
174static struct i2c_driver fan53880_regulator_driver = {
175 .driver = {
176 .name = "fan53880",
177 .of_match_table = of_match_ptr(fan53880_dt_ids),
178 },
179 .probe_new = fan53880_i2c_probe,
180 .id_table = fan53880_i2c_id,
181};
182module_i2c_driver(fan53880_regulator_driver);
183
184MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver");
185MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>");
186MODULE_LICENSE("GPL");
187
