1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* Regulator driver for tps65090 power management chip.
*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/tps65090.h>
#include <linux/regulator/tps65090-regulator.h>
struct tps65090_regulator {
int id;
/* Regulator register address.*/
u8 reg_en_reg;
u8 en_bit;
/* used by regulator core */
struct regulator_desc desc;
/* Device */
struct device *dev;
};
static inline struct device *to_tps65090_dev(struct regulator_dev *rdev)
{
return rdev_get_dev(rdev)->parent->parent;
}
static int tps65090_reg_is_enabled(struct regulator_dev *rdev)
{
struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps65090_dev(rdev);
uint8_t control;
int ret;
ret = tps65090_read(parent, ri->reg_en_reg, &control);
if (ret < 0) {
dev_err(&rdev->dev, "Error in reading reg 0x%x\n",
ri->reg_en_reg);
return ret;
}
return (((control >> ri->en_bit) & 1) == 1);
}
static int tps65090_reg_enable(struct regulator_dev *rdev)
{
struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps65090_dev(rdev);
int ret;
ret = tps65090_set_bits(parent, ri->reg_en_reg, ri->en_bit);
if (ret < 0)
dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
ri->reg_en_reg);
return ret;
}
static int tps65090_reg_disable(struct regulator_dev *rdev)
{
struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps65090_dev(rdev);
int ret;
ret = tps65090_clr_bits(parent, ri->reg_en_reg, ri->en_bit);
if (ret < 0)
dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
ri->reg_en_reg);
return ret;
}
static struct regulator_ops tps65090_ops = {
.enable = tps65090_reg_enable,
.disable = tps65090_reg_disable,
.is_enabled = tps65090_reg_is_enabled,
};
#define tps65090_REG(_id) \
{ \
.reg_en_reg = (TPS65090_ID_##_id) + 12, \
.en_bit = 0, \
.id = TPS65090_ID_##_id, \
.desc = { \
.name = tps65090_rails(_id), \
.id = TPS65090_ID_##_id, \
.ops = &tps65090_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
static struct tps65090_regulator TPS65090_regulator[] = {
tps65090_REG(DCDC1),
tps65090_REG(DCDC2),
tps65090_REG(DCDC3),
tps65090_REG(FET1),
tps65090_REG(FET2),
tps65090_REG(FET3),
tps65090_REG(FET4),
tps65090_REG(FET5),
tps65090_REG(FET6),
tps65090_REG(FET7),
};
static inline struct tps65090_regulator *find_regulator_info(int id)
{
struct tps65090_regulator *ri;
int i;
for (i = 0; i < ARRAY_SIZE(TPS65090_regulator); i++) {
ri = &TPS65090_regulator[i];
if (ri->desc.id == id)
return ri;
}
return NULL;
}
static int __devinit tps65090_regulator_probe(struct platform_device *pdev)
{
struct tps65090_regulator *ri = NULL;
struct regulator_dev *rdev;
struct tps65090_regulator_platform_data *tps_pdata;
int id = pdev->id;
dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
ri = find_regulator_info(id);
if (ri == NULL) {
dev_err(&pdev->dev, "invalid regulator ID specified\n");
return -EINVAL;
}
tps_pdata = pdev->dev.platform_data;
ri->dev = &pdev->dev;
rdev = regulator_register(&ri->desc, &pdev->dev,
&tps_pdata->regulator, ri, NULL);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
ri->desc.name);
return PTR_ERR(rdev);
}
platform_set_drvdata(pdev, rdev);
return 0;
}
static int __devexit tps65090_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
regulator_unregister(rdev);
return 0;
}
static struct platform_driver tps65090_regulator_driver = {
.driver = {
.name = "tps65090-regulator",
.owner = THIS_MODULE,
},
.probe = tps65090_regulator_probe,
.remove = __devexit_p(tps65090_regulator_remove),
};
static int __init tps65090_regulator_init(void)
{
return platform_driver_register(&tps65090_regulator_driver);
}
subsys_initcall(tps65090_regulator_init);
static void __exit tps65090_regulator_exit(void)
{
platform_driver_unregister(&tps65090_regulator_driver);
}
module_exit(tps65090_regulator_exit);
MODULE_DESCRIPTION("tps65090 regulator driver");
MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
MODULE_LICENSE("GPL v2");
|
