6b13f685e
 김민수
BSP 최초 추가
|
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
|
/*
* drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC
* hardware monitoring features.
*
* Copyright (C) 2009 Wolfson Microelectronics plc
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License v2 as published by the
* Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/mfd/wm8350/core.h>
#include <linux/mfd/wm8350/comparator.h>
static ssize_t show_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "wm8350
");
}
static const char * const input_names[] = {
[WM8350_AUXADC_USB] = "USB",
[WM8350_AUXADC_LINE] = "Line",
[WM8350_AUXADC_BATT] = "Battery",
};
static ssize_t show_voltage(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct wm8350 *wm8350 = dev_get_drvdata(dev);
int channel = to_sensor_dev_attr(attr)->index;
int val;
val = wm8350_read_auxadc(wm8350, channel, 0, 0) * WM8350_AUX_COEFF;
val = DIV_ROUND_CLOSEST(val, 1000);
return sprintf(buf, "%d
", val);
}
static ssize_t show_label(struct device *dev,
struct device_attribute *attr, char *buf)
{
int channel = to_sensor_dev_attr(attr)->index;
return sprintf(buf, "%s
", input_names[channel]);
}
#define WM8350_NAMED_VOLTAGE(id, name) \
static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage,\
NULL, name); \
static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \
NULL, name)
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB);
WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT);
WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE);
static struct attribute *wm8350_attributes[] = {
&dev_attr_name.attr,
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in0_label.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_label.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_label.dev_attr.attr,
NULL,
};
static const struct attribute_group wm8350_attr_group = {
.attrs = wm8350_attributes,
};
static int wm8350_hwmon_probe(struct platform_device *pdev)
{
struct wm8350 *wm8350 = platform_get_drvdata(pdev);
int ret;
ret = sysfs_create_group(&pdev->dev.kobj, &wm8350_attr_group);
if (ret)
goto err;
wm8350->hwmon.classdev = hwmon_device_register(&pdev->dev);
if (IS_ERR(wm8350->hwmon.classdev)) {
ret = PTR_ERR(wm8350->hwmon.classdev);
goto err_group;
}
return 0;
err_group:
sysfs_remove_group(&pdev->dev.kobj, &wm8350_attr_group);
err:
return ret;
}
static int wm8350_hwmon_remove(struct platform_device *pdev)
{
struct wm8350 *wm8350 = platform_get_drvdata(pdev);
hwmon_device_unregister(wm8350->hwmon.classdev);
sysfs_remove_group(&pdev->dev.kobj, &wm8350_attr_group);
return 0;
}
static struct platform_driver wm8350_hwmon_driver = {
.probe = wm8350_hwmon_probe,
.remove = wm8350_hwmon_remove,
.driver = {
.name = "wm8350-hwmon",
.owner = THIS_MODULE,
},
};
module_platform_driver(wm8350_hwmon_driver);
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM8350 Hardware Monitoring");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8350-hwmon");
|