3  * <linux/gpio.h>
5  * This is the LEGACY GPIO bulk include file, including legacy APIs. It is
6  * used for GPIO drivers still referencing the global GPIO numberspace,
9  * If you're implementing a GPIO driver, only include <linux/gpio/driver.h>
10  * If you're implementing a GPIO consumer, only include <linux/gpio/consumer.h>
19 /* see Documentation/driver-api/gpio/legacy.rst */
21 /* make these flag values available regardless of GPIO kconfig options */
32 /* Gpio pin is active-low */
36  * struct gpio - a structure describing a GPIO with configuration
37  * @gpio:	the GPIO number
38  * @flags:	GPIO configuration as specified by GPIOF_*
39  * @label:	a literal description string of this GPIO
41 struct gpio {  struct
42 	unsigned	gpio;  argument
49 #include <linux/gpio/consumer.h>  argument
52  * "valid" GPIO numbers are nonnegative and may be passed to
56  * Invalid GPIO numbers are useful for indicating no-such-GPIO in
66  * Platforms may implement their GPIO interface with library code,
68  * extra memory (for code and for per-GPIO table entries).
78 /* Always use the library code for GPIO management calls,
81 int gpio_request(unsigned gpio, const char *label);
82 void gpio_free(unsigned gpio);
84 static inline int gpio_direction_input(unsigned gpio)  in gpio_direction_input()  argument
86 	return gpiod_direction_input(gpio_to_desc(gpio));  in gpio_direction_input()
88 static inline int gpio_direction_output(unsigned gpio, int value)  in gpio_direction_output()  argument
90 	return gpiod_direction_output_raw(gpio_to_desc(gpio), value);  in gpio_direction_output()
93 static inline int gpio_get_value_cansleep(unsigned gpio)  in gpio_get_value_cansleep()  argument
95 	return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio));  in gpio_get_value_cansleep()
97 static inline void gpio_set_value_cansleep(unsigned gpio, int value)  in gpio_set_value_cansleep()  argument
99 	return gpiod_set_raw_value_cansleep(gpio_to_desc(gpio), value);  in gpio_set_value_cansleep()
102 static inline int gpio_get_value(unsigned gpio)  in gpio_get_value()  argument
104 	return gpiod_get_raw_value(gpio_to_desc(gpio));  in gpio_get_value()
106 static inline void gpio_set_value(unsigned gpio, int value)  in gpio_set_value()  argument
108 	return gpiod_set_raw_value(gpio_to_desc(gpio), value);  in gpio_set_value()
111 static inline int gpio_to_irq(unsigned gpio)  in gpio_to_irq()  argument
113 	return gpiod_to_irq(gpio_to_desc(gpio));  in gpio_to_irq()
116 int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);
117 int gpio_request_array(const struct gpio *array, size_t num);
118 void gpio_free_array(const struct gpio *array, size_t num);
122 int devm_gpio_request(struct device *dev, unsigned gpio, const char *label);
123 int devm_gpio_request_one(struct device *dev, unsigned gpio,
138 static inline int gpio_request(unsigned gpio, const char *label)  in gpio_request()  argument
143 static inline int gpio_request_one(unsigned gpio,  in gpio_request_one()  argument
149 static inline int gpio_request_array(const struct gpio *array, size_t num)  in gpio_request_array()
154 static inline void gpio_free(unsigned gpio)  in gpio_free()  argument
158 	/* GPIO can never have been requested */  in gpio_free()
162 static inline void gpio_free_array(const struct gpio *array, size_t num)  in gpio_free_array()
166 	/* GPIO can never have been requested */  in gpio_free_array()
170 static inline int gpio_direction_input(unsigned gpio)  in gpio_direction_input()  argument
175 static inline int gpio_direction_output(unsigned gpio, int value)  in gpio_direction_output()  argument
180 static inline int gpio_get_value(unsigned gpio)  in gpio_get_value()  argument
182 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_get_value()
187 static inline void gpio_set_value(unsigned gpio, int value)  in gpio_set_value()  argument
189 	/* GPIO can never have been requested or set as output */  in gpio_set_value()
193 static inline int gpio_get_value_cansleep(unsigned gpio)  in gpio_get_value_cansleep()  argument
195 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_get_value_cansleep()
200 static inline void gpio_set_value_cansleep(unsigned gpio, int value)  in gpio_set_value_cansleep()  argument
202 	/* GPIO can never have been requested or set as output */  in gpio_set_value_cansleep()
206 static inline int gpio_to_irq(unsigned gpio)  in gpio_to_irq()  argument
208 	/* GPIO can never have been requested or set as input */  in gpio_to_irq()
213 static inline int devm_gpio_request(struct device *dev, unsigned gpio,  in devm_gpio_request()  argument
220 static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,  in devm_gpio_request_one()  argument