regulator: tps65090: rename regulator enums
[linux-2.6.git] / drivers / regulator / tps65090-regulator.c
1 /*
2  * Regulator driver for tps65090 power management chip.
3  *
4  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
5
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms and conditions of the GNU General Public License,
8  * version 2, as published by the Free Software Foundation.
9
10  * This program is distributed in the hope it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13  * more details.
14
15  * You should have received a copy of the GNU General Public License
16  * along with this program.  If not, see <http://www.gnu.org/licenses/>
17  */
18
19 #include <linux/module.h>
20 #include <linux/delay.h>
21 #include <linux/init.h>
22 #include <linux/slab.h>
23 #include <linux/err.h>
24 #include <linux/platform_device.h>
25 #include <linux/regulator/driver.h>
26 #include <linux/regulator/machine.h>
27 #include <linux/mfd/tps65090.h>
28 #include <linux/regulator/tps65090-regulator.h>
29
30 struct tps65090_regulator {
31         int             id;
32         /* Regulator register address.*/
33         u8              reg_en_reg;
34         u8              en_bit;
35
36         /* used by regulator core */
37         struct regulator_desc   desc;
38
39         /* Device */
40         struct device           *dev;
41 };
42
43 static inline struct device *to_tps65090_dev(struct regulator_dev *rdev)
44 {
45         return rdev_get_dev(rdev)->parent->parent;
46 }
47
48 static int tps65090_reg_is_enabled(struct regulator_dev *rdev)
49 {
50         struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
51         struct device *parent = to_tps65090_dev(rdev);
52         uint8_t control;
53         int ret;
54
55         ret = tps65090_read(parent, ri->reg_en_reg, &control);
56         if (ret < 0) {
57                 dev_err(&rdev->dev, "Error in reading reg 0x%x\n",
58                         ri->reg_en_reg);
59                 return ret;
60         }
61         return (((control >> ri->en_bit) & 1) == 1);
62 }
63
64 static int tps65090_reg_enable(struct regulator_dev *rdev)
65 {
66         struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
67         struct device *parent = to_tps65090_dev(rdev);
68         int ret;
69
70         ret = tps65090_set_bits(parent, ri->reg_en_reg, ri->en_bit);
71         if (ret < 0)
72                 dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
73                         ri->reg_en_reg);
74         return ret;
75 }
76
77 static int tps65090_reg_disable(struct regulator_dev *rdev)
78 {
79         struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
80         struct device *parent = to_tps65090_dev(rdev);
81         int ret;
82
83         ret = tps65090_clr_bits(parent, ri->reg_en_reg, ri->en_bit);
84         if (ret < 0)
85                 dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
86                         ri->reg_en_reg);
87
88         return ret;
89 }
90
91 static struct regulator_ops tps65090_ops = {
92         .enable         = tps65090_reg_enable,
93         .disable        = tps65090_reg_disable,
94         .is_enabled     = tps65090_reg_is_enabled,
95 };
96
97 #define tps65090_REG(_id, _en_reg, _en_bit, _ops)       \
98 {                                                       \
99         .reg_en_reg     = _en_reg,                      \
100         .en_bit         = _en_bit,                      \
101         .id             = TPS65090_REGULATOR_##_id,     \
102         .desc = {                                       \
103                 .name = tps65090_rails(_id),            \
104                 .id = TPS65090_REGULATOR_##_id,         \
105                 .ops = &_ops,                           \
106                 .type = REGULATOR_VOLTAGE,              \
107                 .owner = THIS_MODULE,                   \
108         },                                              \
109 }
110
111 static struct tps65090_regulator TPS65090_regulator[] = {
112         tps65090_REG(DCDC1, 12, 0, tps65090_ops),
113         tps65090_REG(DCDC2, 13, 0, tps65090_ops),
114         tps65090_REG(DCDC3, 14, 0, tps65090_ops),
115         tps65090_REG(FET1,  15, 0, tps65090_ops),
116         tps65090_REG(FET2,  16, 0, tps65090_ops),
117         tps65090_REG(FET3,  17, 0, tps65090_ops),
118         tps65090_REG(FET4,  18, 0, tps65090_ops),
119         tps65090_REG(FET5,  19, 0, tps65090_ops),
120         tps65090_REG(FET6,  20, 0, tps65090_ops),
121         tps65090_REG(FET7,  21, 0, tps65090_ops),
122 };
123
124 static inline struct tps65090_regulator *find_regulator_info(int id)
125 {
126         struct tps65090_regulator *ri;
127         int i;
128
129         for (i = 0; i < ARRAY_SIZE(TPS65090_regulator); i++) {
130                 ri = &TPS65090_regulator[i];
131                 if (ri->desc.id == id)
132                         return ri;
133         }
134         return NULL;
135 }
136
137 static int __devinit tps65090_regulator_probe(struct platform_device *pdev)
138 {
139         struct tps65090_regulator *ri = NULL;
140         struct regulator_dev *rdev;
141         struct tps65090_regulator_platform_data *tps_pdata;
142         int id = pdev->id;
143
144         dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
145
146         ri = find_regulator_info(id);
147         if (ri == NULL) {
148                 dev_err(&pdev->dev, "invalid regulator ID specified\n");
149                 return -EINVAL;
150         }
151         tps_pdata = pdev->dev.platform_data;
152         ri->dev = &pdev->dev;
153
154         rdev = regulator_register(&ri->desc, &pdev->dev,
155                                 &tps_pdata->regulator, ri);
156         if (IS_ERR(rdev)) {
157                 dev_err(&pdev->dev, "failed to register regulator %s\n",
158                                 ri->desc.name);
159                 return PTR_ERR(rdev);
160         }
161
162         platform_set_drvdata(pdev, rdev);
163         return 0;
164 }
165
166 static int __devexit tps65090_regulator_remove(struct platform_device *pdev)
167 {
168         struct regulator_dev *rdev = platform_get_drvdata(pdev);
169
170         regulator_unregister(rdev);
171         return 0;
172 }
173
174 static struct platform_driver tps65090_regulator_driver = {
175         .driver = {
176                 .name   = "tps65090-regulator",
177                 .owner  = THIS_MODULE,
178         },
179         .probe          = tps65090_regulator_probe,
180         .remove         = __devexit_p(tps65090_regulator_remove),
181 };
182
183 static int __init tps65090_regulator_init(void)
184 {
185         return platform_driver_register(&tps65090_regulator_driver);
186 }
187 subsys_initcall(tps65090_regulator_init);
188
189 static void __exit tps65090_regulator_exit(void)
190 {
191         platform_driver_unregister(&tps65090_regulator_driver);
192 }
193 module_exit(tps65090_regulator_exit);
194
195 MODULE_DESCRIPTION("tps65090 regulator driver");
196 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
197 MODULE_LICENSE("GPL v2");