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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/i2c.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 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 = tps6105x_mask_and_set(tps6105x, 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 = tps6105x_mask_and_set(tps6105x, 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 u8 regval;
64 int ret;
65
66 ret = tps6105x_get(tps6105x, 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 u8 regval;
82 int ret;
83
84 ret = tps6105x_get(tps6105x, 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 = tps6105x_mask_and_set(tps6105x, 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 int tps6105x_regulator_list_voltage(struct regulator_dev *rdev,
109 unsigned selector)
110{
111 if (selector >= ARRAY_SIZE(tps6105x_voltages))
112 return -EINVAL;
113
114 return tps6105x_voltages[selector];
115}
116
117static struct regulator_ops tps6105x_regulator_ops = {
118 .enable = tps6105x_regulator_enable,
119 .disable = tps6105x_regulator_disable,
120 .is_enabled = tps6105x_regulator_is_enabled,
121 .get_voltage_sel = tps6105x_regulator_get_voltage_sel,
122 .set_voltage_sel = tps6105x_regulator_set_voltage_sel,
123 .list_voltage = tps6105x_regulator_list_voltage,
124};
125
126static struct regulator_desc tps6105x_regulator_desc = {
127 .name = "tps6105x-boost",
128 .ops = &tps6105x_regulator_ops,
129 .type = REGULATOR_VOLTAGE,
130 .id = 0,
131 .owner = THIS_MODULE,
132 .n_voltages = ARRAY_SIZE(tps6105x_voltages),
133};
134
135
136
137
138static int __devinit tps6105x_regulator_probe(struct platform_device *pdev)
139{
140 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
141 struct tps6105x_platform_data *pdata = tps6105x->pdata;
142 int ret;
143
144
145 if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
146 dev_info(&pdev->dev,
147 "chip not in voltage mode mode, exit probe \n");
148 return 0;
149 }
150
151
152 tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
153 &tps6105x->client->dev,
154 pdata->regulator_data, tps6105x,
155 NULL);
156 if (IS_ERR(tps6105x->regulator)) {
157 ret = PTR_ERR(tps6105x->regulator);
158 dev_err(&tps6105x->client->dev,
159 "failed to register regulator\n");
160 return ret;
161 }
162 platform_set_drvdata(pdev, tps6105x);
163
164 return 0;
165}
166
167static int __devexit tps6105x_regulator_remove(struct platform_device *pdev)
168{
169 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
170 regulator_unregister(tps6105x->regulator);
171 return 0;
172}
173
174static struct platform_driver tps6105x_regulator_driver = {
175 .driver = {
176 .name = "tps6105x-regulator",
177 .owner = THIS_MODULE,
178 },
179 .probe = tps6105x_regulator_probe,
180 .remove = __devexit_p(tps6105x_regulator_remove),
181};
182
183static __init int tps6105x_regulator_init(void)
184{
185 return platform_driver_register(&tps6105x_regulator_driver);
186}
187subsys_initcall(tps6105x_regulator_init);
188
189static __exit void tps6105x_regulator_exit(void)
190{
191 platform_driver_unregister(&tps6105x_regulator_driver);
192}
193module_exit(tps6105x_regulator_exit);
194
195MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
196MODULE_DESCRIPTION("TPS6105x regulator driver");
197MODULE_LICENSE("GPL v2");
198MODULE_ALIAS("platform:tps6105x-regulator");
199
