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13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/init.h>
16#include <linux/err.h>
17#include <linux/regmap.h>
18#include <linux/platform_device.h>
19#include <linux/regulator/driver.h>
20#include <linux/mfd/core.h>
21#include <linux/mfd/tps6105x.h>
22
23static const unsigned int tps6105x_voltages[] = {
24 4500000,
25 5000000,
26 5250000,
27 5000000,
28};
29
30static int tps6105x_regulator_enable(struct regulator_dev *rdev)
31{
32 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
33 int ret;
34
35
36 ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
37 TPS6105X_REG0_MODE_MASK,
38 TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
39 if (ret)
40 return ret;
41
42 return 0;
43}
44
45static int tps6105x_regulator_disable(struct regulator_dev *rdev)
46{
47 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
48 int ret;
49
50
51 ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
52 TPS6105X_REG0_MODE_MASK,
53 TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
54 if (ret)
55 return ret;
56
57 return 0;
58}
59
60static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
61{
62 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
63 unsigned int regval;
64 int ret;
65
66 ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, ®val);
67 if (ret)
68 return ret;
69 regval &= TPS6105X_REG0_MODE_MASK;
70 regval >>= TPS6105X_REG0_MODE_SHIFT;
71
72 if (regval == TPS6105X_REG0_MODE_VOLTAGE)
73 return 1;
74
75 return 0;
76}
77
78static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
79{
80 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
81 unsigned int regval;
82 int ret;
83
84 ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, ®val);
85 if (ret)
86 return ret;
87
88 regval &= TPS6105X_REG0_VOLTAGE_MASK;
89 regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
90 return (int) regval;
91}
92
93static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
94 unsigned selector)
95{
96 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
97 int ret;
98
99 ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
100 TPS6105X_REG0_VOLTAGE_MASK,
101 selector << TPS6105X_REG0_VOLTAGE_SHIFT);
102 if (ret)
103 return ret;
104
105 return 0;
106}
107
108static struct regulator_ops tps6105x_regulator_ops = {
109 .enable = tps6105x_regulator_enable,
110 .disable = tps6105x_regulator_disable,
111 .is_enabled = tps6105x_regulator_is_enabled,
112 .get_voltage_sel = tps6105x_regulator_get_voltage_sel,
113 .set_voltage_sel = tps6105x_regulator_set_voltage_sel,
114 .list_voltage = regulator_list_voltage_table,
115};
116
117static const struct regulator_desc tps6105x_regulator_desc = {
118 .name = "tps6105x-boost",
119 .ops = &tps6105x_regulator_ops,
120 .type = REGULATOR_VOLTAGE,
121 .id = 0,
122 .owner = THIS_MODULE,
123 .n_voltages = ARRAY_SIZE(tps6105x_voltages),
124 .volt_table = tps6105x_voltages,
125};
126
127
128
129
130static int tps6105x_regulator_probe(struct platform_device *pdev)
131{
132 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
133 struct tps6105x_platform_data *pdata = tps6105x->pdata;
134 struct regulator_config config = { };
135 int ret;
136
137
138 if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
139 dev_info(&pdev->dev,
140 "chip not in voltage mode mode, exit probe\n");
141 return 0;
142 }
143
144 config.dev = &tps6105x->client->dev;
145 config.init_data = pdata->regulator_data;
146 config.driver_data = tps6105x;
147
148
149 tps6105x->regulator = devm_regulator_register(&pdev->dev,
150 &tps6105x_regulator_desc,
151 &config);
152 if (IS_ERR(tps6105x->regulator)) {
153 ret = PTR_ERR(tps6105x->regulator);
154 dev_err(&tps6105x->client->dev,
155 "failed to register regulator\n");
156 return ret;
157 }
158 platform_set_drvdata(pdev, tps6105x);
159
160 return 0;
161}
162
163static struct platform_driver tps6105x_regulator_driver = {
164 .driver = {
165 .name = "tps6105x-regulator",
166 },
167 .probe = tps6105x_regulator_probe,
168};
169
170static __init int tps6105x_regulator_init(void)
171{
172 return platform_driver_register(&tps6105x_regulator_driver);
173}
174subsys_initcall(tps6105x_regulator_init);
175
176static __exit void tps6105x_regulator_exit(void)
177{
178 platform_driver_unregister(&tps6105x_regulator_driver);
179}
180module_exit(tps6105x_regulator_exit);
181
182MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
183MODULE_DESCRIPTION("TPS6105x regulator driver");
184MODULE_LICENSE("GPL v2");
185MODULE_ALIAS("platform:tps6105x-regulator");
186
