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
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __GPIOD_H_
#define __GPIOD_H_
#include <gpio.h>
#include <of_gpio.h>
#include <driver.h>
/**
* Optional flags that can be passed to one of gpiod_* to configure direction
* and output value. These values cannot be OR'd.
*/
enum gpiod_flags {
GPIOD_ASIS = 0,
GPIOD_IN = GPIOF_IN,
/*
* To change this later to a different logic level (i.e. taking
* active low into account), use gpiod_set_value()
*/
GPIOD_OUT_LOW = GPIOF_OUT_INIT_INACTIVE,
GPIOD_OUT_HIGH = GPIOF_OUT_INIT_ACTIVE,
};
#ifdef CONFIG_OFDEVICE
/* returned gpio descriptor can be passed to any normal gpio_* function */
int dev_gpiod_get_index(struct device *dev,
struct device_node *np,
const char *_con_id, int index,
enum gpiod_flags flags,
const char *label);
#else
static inline int dev_gpiod_get_index(struct device *dev,
struct device_node *np,
const char *_con_id, int index,
enum gpiod_flags flags,
const char *label)
{
return -ENODEV;
}
#endif
static inline int dev_gpiod_get(struct device *dev,
struct device_node *np,
const char *con_id,
enum gpiod_flags flags,
const char *label)
{
return dev_gpiod_get_index(dev, np, con_id, 0, flags, label);
}
static inline int gpiod_get(struct device *dev,
const char *_con_id,
enum gpiod_flags flags)
{
return dev_gpiod_get(dev, dev->of_node, _con_id, flags, NULL);
}
static inline void gpiod_direction_input(int gpio)
{
gpio_direction_input(gpio);
}
static inline void gpiod_direction_output(int gpio, bool value)
{
if (gpio != -ENOENT)
gpio_direction_active(gpio, value);
}
static inline void gpiod_set_value(int gpio, bool value)
{
gpiod_direction_output(gpio, value);
}
static inline int gpiod_get_value(int gpio)
{
if (gpio < 0)
return gpio;
return gpio_is_active(gpio);
}
#endif
|
