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
|
/* u1-regulator-consumer.c
*
* Copyright (C) 2011 Samsung Electronics
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that 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.
*
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/machine.h>
static int u1_enable_regulator_for_usb_mipi(bool enable)
{
struct regulator *mipi11_regulator;
struct regulator *mipi18_regulator;
#ifndef CONFIG_MACH_U1_KOR_LGT
struct regulator *hsic12_regulator;
#endif
struct regulator *usb33_regulator;
int ret = 0;
mipi11_regulator = regulator_get(NULL, "vmipi_1.1v");
if (IS_ERR(mipi11_regulator)) {
pr_err("%s: failed to get %s\n", __func__, "vmipi_1.1v");
ret = -ENODEV;
goto out4;
}
mipi18_regulator = regulator_get(NULL, "vmipi_1.8v");
if (IS_ERR(mipi18_regulator)) {
pr_err("%s: failed to get %s\n", __func__, "vmipi_1.8v");
ret = -ENODEV;
goto out3;
}
#ifndef CONFIG_MACH_U1_KOR_LGT
hsic12_regulator = regulator_get(NULL, "vhsic");
if (IS_ERR(hsic12_regulator)) {
pr_err("%s: failed to get %s\n", __func__, "vhsic 1.2v");
ret = -ENODEV;
goto out2;
}
#endif
usb33_regulator = regulator_get(NULL, "vusb_3.3v");
if (IS_ERR(usb33_regulator)) {
pr_err("%s: failed to get %s\n", __func__, "vusb_3.3v");
ret = -ENODEV;
goto out1;
}
if (enable) {
/* Power On Sequence
* MIPI 1.1V -> HSIC 1.2V -> MIPI 1.8V -> USB 3.3V
*/
pr_info("%s: enable LDOs\n", __func__);
if (!regulator_is_enabled(mipi11_regulator))
regulator_enable(mipi11_regulator);
#ifndef CONFIG_MACH_U1_KOR_LGT
if (!regulator_is_enabled(hsic12_regulator))
regulator_enable(hsic12_regulator);
#endif
if (!regulator_is_enabled(mipi18_regulator))
regulator_enable(mipi18_regulator);
if (!regulator_is_enabled(usb33_regulator))
regulator_enable(usb33_regulator);
} else {
/* Power Off Sequence
* USB 3.3V -> MIPI 18V -> HSIC 1.2V -> MIPI 1.1V
*/
pr_info("%s: disable LDOs\n", __func__);
regulator_force_disable(usb33_regulator);
regulator_force_disable(mipi18_regulator);
#ifndef CONFIG_MACH_U1_KOR_LGT
regulator_force_disable(hsic12_regulator);
#endif
regulator_force_disable(mipi11_regulator);
}
regulator_put(usb33_regulator);
out1:
#ifndef CONFIG_MACH_U1_KOR_LGT
regulator_put(hsic12_regulator);
#endif
out2:
regulator_put(mipi18_regulator);
out3:
regulator_put(mipi11_regulator);
out4:
return ret;
}
static int regulator_consumer_probe(struct platform_device *pdev)
{
pr_info("%s: loading u1-regulator-consumer\n", __func__);
return 0;
}
#ifdef CONFIG_PM
static int regulator_consumer_suspend(struct device *dev)
{
u1_enable_regulator_for_usb_mipi(false);
return 0;
}
static int regulator_consumer_resume(struct device *dev)
{
u1_enable_regulator_for_usb_mipi(true);
return 0;
}
#else
#define regulator_consumer_suspend NULL
#define regulator_consumer_resume NULL
#endif /* CONFIG_PM */
static const struct dev_pm_ops regulator_consumer_pm_ops = {
.suspend = regulator_consumer_suspend,
.resume = regulator_consumer_resume,
};
static struct platform_driver regulator_consumer_driver = {
.probe = regulator_consumer_probe,
.driver = {
.owner = THIS_MODULE,
.name = "u1-regulator-consumer",
.pm = ®ulator_consumer_pm_ops,
},
};
static int __init regulator_consumer_init(void)
{
return platform_driver_register(®ulator_consumer_driver);
}
module_init(regulator_consumer_init);
MODULE_DESCRIPTION("U1 regulator consumer driver");
MODULE_AUTHOR("ms925.kim@samsung.com");
MODULE_LICENSE("GPL");
|
