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Commit | Line | Data |
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2edd3b69 LW |
1 | /* |
2 | * Driver for TPS61050/61052 boost converters, typically used for white LEDs | |
3 | * or audio amplifiers. | |
4 | * | |
5 | * Copyright (C) 2011 ST-Ericsson SA | |
6 | * Written on behalf of Linaro for ST-Ericsson | |
7 | * | |
8 | * Author: Linus Walleij <linus.walleij@linaro.org> | |
9 | * | |
10 | * License terms: GNU General Public License (GPL) version 2 | |
11 | */ | |
12 | ||
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 | ||
23 | static const int tps6105x_voltages[] = { | |
24 | 4500000, | |
25 | 5000000, | |
26 | 5250000, | |
27 | 5000000, /* There is an additional 5V */ | |
28 | }; | |
29 | ||
30 | static int tps6105x_regulator_enable(struct regulator_dev *rdev) | |
31 | { | |
32 | struct tps6105x *tps6105x = rdev_get_drvdata(rdev); | |
33 | int ret; | |
34 | ||
35 | /* Activate voltage mode */ | |
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 | ||
45 | static int tps6105x_regulator_disable(struct regulator_dev *rdev) | |
46 | { | |
47 | struct tps6105x *tps6105x = rdev_get_drvdata(rdev); | |
48 | int ret; | |
49 | ||
50 | /* Set into shutdown mode */ | |
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 | ||
60 | static 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 | ||
78 | static 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 | ||
93 | static 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 | ||
108 | static 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 | ||
117 | static 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 | ||
d882d73e | 126 | static const struct regulator_desc tps6105x_regulator_desc = { |
2edd3b69 LW |
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 | * Registers the chip as a voltage regulator | |
137 | */ | |
138 | static int __devinit tps6105x_regulator_probe(struct platform_device *pdev) | |
139 | { | |
a7c98ce2 | 140 | struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev); |
2edd3b69 | 141 | struct tps6105x_platform_data *pdata = tps6105x->pdata; |
c172708d | 142 | struct regulator_config config = { }; |
2edd3b69 LW |
143 | int ret; |
144 | ||
145 | /* This instance is not set for regulator mode so bail out */ | |
146 | if (pdata->mode != TPS6105X_MODE_VOLTAGE) { | |
147 | dev_info(&pdev->dev, | |
148 | "chip not in voltage mode mode, exit probe \n"); | |
149 | return 0; | |
150 | } | |
151 | ||
c172708d MB |
152 | config.dev = &tps6105x->client->dev; |
153 | config.init_data = pdata->regulator_data; | |
154 | config.driver_data = tps6105x; | |
155 | ||
2edd3b69 LW |
156 | /* Register regulator with framework */ |
157 | tps6105x->regulator = regulator_register(&tps6105x_regulator_desc, | |
c172708d | 158 | &config); |
2edd3b69 LW |
159 | if (IS_ERR(tps6105x->regulator)) { |
160 | ret = PTR_ERR(tps6105x->regulator); | |
161 | dev_err(&tps6105x->client->dev, | |
162 | "failed to register regulator\n"); | |
163 | return ret; | |
164 | } | |
f0f060bd | 165 | platform_set_drvdata(pdev, tps6105x); |
2edd3b69 LW |
166 | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static int __devexit tps6105x_regulator_remove(struct platform_device *pdev) | |
171 | { | |
a7c98ce2 | 172 | struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev); |
2edd3b69 LW |
173 | regulator_unregister(tps6105x->regulator); |
174 | return 0; | |
175 | } | |
176 | ||
177 | static struct platform_driver tps6105x_regulator_driver = { | |
178 | .driver = { | |
179 | .name = "tps6105x-regulator", | |
180 | .owner = THIS_MODULE, | |
181 | }, | |
182 | .probe = tps6105x_regulator_probe, | |
183 | .remove = __devexit_p(tps6105x_regulator_remove), | |
184 | }; | |
185 | ||
186 | static __init int tps6105x_regulator_init(void) | |
187 | { | |
188 | return platform_driver_register(&tps6105x_regulator_driver); | |
189 | } | |
190 | subsys_initcall(tps6105x_regulator_init); | |
191 | ||
192 | static __exit void tps6105x_regulator_exit(void) | |
193 | { | |
194 | platform_driver_unregister(&tps6105x_regulator_driver); | |
195 | } | |
196 | module_exit(tps6105x_regulator_exit); | |
197 | ||
198 | MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>"); | |
199 | MODULE_DESCRIPTION("TPS6105x regulator driver"); | |
200 | MODULE_LICENSE("GPL v2"); | |
201 | MODULE_ALIAS("platform:tps6105x-regulator"); |