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
|
/*
* Copyright(c) 2015 Hauke Mehrtens <hauke@hauke-m.de>
*
* Backport functionality introduced in Linux 4.5.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/leds.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/leds.h>
#include <linux/phy.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <asm/uaccess.h>
#if LINUX_VERSION_IS_GEQ(3,19,0)
int led_set_brightness_sync(struct led_classdev *led_cdev,
enum led_brightness value)
{
if (led_cdev->blink_delay_on || led_cdev->blink_delay_off)
return -EBUSY;
led_cdev->brightness = min(value, led_cdev->max_brightness);
if (led_cdev->flags & LED_SUSPENDED)
return 0;
if (led_cdev->brightness_set_sync)
return led_cdev->brightness_set_sync(led_cdev,
led_cdev->brightness);
return -ENOTSUPP;
}
EXPORT_SYMBOL_GPL(led_set_brightness_sync);
#endif /* >= 3.19 */
#if LINUX_VERSION_IS_GEQ(3,2,0)
/**
* no_seek_end_llseek - llseek implementation for fixed-sized devices
* @file: file structure to seek on
* @offset: file offset to seek to
* @whence: type of seek
*
*/
loff_t no_seek_end_llseek(struct file *file, loff_t offset, int whence)
{
switch (whence) {
case SEEK_SET: case SEEK_CUR:
#if LINUX_VERSION_IS_GEQ(3,6,0)
return generic_file_llseek_size(file, offset, whence,
~0ULL, 0);
#else
return generic_file_llseek_size(file, offset, whence,
~0ULL);
#endif
default:
return -EINVAL;
}
}
EXPORT_SYMBOL_GPL(no_seek_end_llseek);
#endif /* >= 3.2 */
/**
* memdup_user_nul - duplicate memory region from user space and NUL-terminate
*
* @src: source address in user space
* @len: number of bytes to copy
*
* Returns an ERR_PTR() on failure.
*/
void *memdup_user_nul(const void __user *src, size_t len)
{
char *p;
/*
* Always use GFP_KERNEL, since copy_from_user() can sleep and
* cause pagefault, which makes it pointless to use GFP_NOFS
* or GFP_ATOMIC.
*/
p = kmalloc(len + 1, GFP_KERNEL);
if (!p)
return ERR_PTR(-ENOMEM);
if (copy_from_user(p, src, len)) {
kfree(p);
return ERR_PTR(-EFAULT);
}
p[len] = '\0';
return p;
}
EXPORT_SYMBOL_GPL(memdup_user_nul);
void phy_attached_info(struct phy_device *phydev)
{
phy_attached_print(phydev, NULL);
}
EXPORT_SYMBOL_GPL(phy_attached_info);
#define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)"
void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
{
if (!fmt) {
dev_info(&phydev->dev, ATTACHED_FMT "\n",
phydev->drv->name, phydev_name(phydev),
phydev->irq);
} else {
va_list ap;
dev_info(&phydev->dev, ATTACHED_FMT,
phydev->drv->name, phydev_name(phydev),
phydev->irq);
va_start(ap, fmt);
vprintk(fmt, ap);
va_end(ap);
}
}
EXPORT_SYMBOL_GPL(phy_attached_print);
static void devm_led_trigger_release(struct device *dev, void *res)
{
led_trigger_unregister(*(struct led_trigger **)res);
}
int devm_led_trigger_register(struct device *dev,
struct led_trigger *trig)
{
struct led_trigger **dr;
int rc;
dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),
GFP_KERNEL);
if (!dr)
return -ENOMEM;
*dr = trig;
rc = led_trigger_register(trig);
if (rc)
devres_free(dr);
else
devres_add(dev, dr);
return rc;
}
EXPORT_SYMBOL_GPL(devm_led_trigger_register);
|
