1
2
3
4
5
6
7
8
9#ifndef GPIOLIB_H
10#define GPIOLIB_H
11
12#include <linux/gpio/driver.h>
13#include <linux/gpio/consumer.h>
14#include <linux/err.h>
15#include <linux/device.h>
16#include <linux/module.h>
17#include <linux/cdev.h>
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
44struct gpio_device {
45 int id;
46 struct device dev;
47 struct cdev chrdev;
48 struct device *mockdev;
49 struct module *owner;
50 struct gpio_chip *chip;
51 struct gpio_desc *descs;
52 int base;
53 u16 ngpio;
54 const char *label;
55 void *data;
56 struct list_head list;
57
58#ifdef CONFIG_PINCTRL
59
60
61
62
63
64
65 struct list_head pin_ranges;
66#endif
67};
68
69
70static __maybe_unused const char * const gpio_suffixes[] = { "gpios", "gpio" };
71
72struct gpio_array {
73 struct gpio_desc **desc;
74 unsigned int size;
75 struct gpio_chip *chip;
76 unsigned long *get_mask;
77 unsigned long *set_mask;
78 unsigned long invert_mask[];
79};
80
81struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, u16 hwnum);
82int gpiod_get_array_value_complex(bool raw, bool can_sleep,
83 unsigned int array_size,
84 struct gpio_desc **desc_array,
85 struct gpio_array *array_info,
86 unsigned long *value_bitmap);
87int gpiod_set_array_value_complex(bool raw, bool can_sleep,
88 unsigned int array_size,
89 struct gpio_desc **desc_array,
90 struct gpio_array *array_info,
91 unsigned long *value_bitmap);
92
93extern spinlock_t gpio_lock;
94extern struct list_head gpio_devices;
95
96struct gpio_desc {
97 struct gpio_device *gdev;
98 unsigned long flags;
99
100#define FLAG_REQUESTED 0
101#define FLAG_IS_OUT 1
102#define FLAG_EXPORT 2
103#define FLAG_SYSFS 3
104#define FLAG_ACTIVE_LOW 6
105#define FLAG_OPEN_DRAIN 7
106#define FLAG_OPEN_SOURCE 8
107#define FLAG_USED_AS_IRQ 9
108#define FLAG_IRQ_IS_ENABLED 10
109#define FLAG_IS_HOGGED 11
110#define FLAG_TRANSITORY 12
111#define FLAG_PULL_UP 13
112#define FLAG_PULL_DOWN 14
113#define FLAG_BIAS_DISABLE 15
114
115
116 const char *label;
117
118 const char *name;
119};
120
121int gpiod_request(struct gpio_desc *desc, const char *label);
122void gpiod_free(struct gpio_desc *desc);
123int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
124 unsigned long lflags, enum gpiod_flags dflags);
125int gpiod_hog(struct gpio_desc *desc, const char *name,
126 unsigned long lflags, enum gpiod_flags dflags);
127
128
129
130
131static inline int gpio_chip_hwgpio(const struct gpio_desc *desc)
132{
133 return desc - &desc->gdev->descs[0];
134}
135
136
137
138#define gpiod_emerg(desc, fmt, ...) \
139 pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
140 ##__VA_ARGS__)
141#define gpiod_crit(desc, fmt, ...) \
142 pr_crit("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
143 ##__VA_ARGS__)
144#define gpiod_err(desc, fmt, ...) \
145 pr_err("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
146 ##__VA_ARGS__)
147#define gpiod_warn(desc, fmt, ...) \
148 pr_warn("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
149 ##__VA_ARGS__)
150#define gpiod_info(desc, fmt, ...) \
151 pr_info("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
152 ##__VA_ARGS__)
153#define gpiod_dbg(desc, fmt, ...) \
154 pr_debug("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
155 ##__VA_ARGS__)
156
157
158
159#define chip_emerg(chip, fmt, ...) \
160 dev_emerg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
161#define chip_crit(chip, fmt, ...) \
162 dev_crit(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
163#define chip_err(chip, fmt, ...) \
164 dev_err(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
165#define chip_warn(chip, fmt, ...) \
166 dev_warn(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
167#define chip_info(chip, fmt, ...) \
168 dev_info(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
169#define chip_dbg(chip, fmt, ...) \
170 dev_dbg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
171
172#ifdef CONFIG_GPIO_SYSFS
173
174int gpiochip_sysfs_register(struct gpio_device *gdev);
175void gpiochip_sysfs_unregister(struct gpio_device *gdev);
176
177#else
178
179static inline int gpiochip_sysfs_register(struct gpio_device *gdev)
180{
181 return 0;
182}
183
184static inline void gpiochip_sysfs_unregister(struct gpio_device *gdev)
185{
186}
187
188#endif
189
190#endif
191