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>
17 /* see Documentation/driver-api/gpio/legacy.rst */
19 /* make these flag values available regardless of GPIO kconfig options */
30 /* Gpio pin is active-low */
33 /* Gpio pin is open drain */
36 /* Gpio pin is open source */
45  * struct gpio - a structure describing a GPIO with configuration
46  * @gpio:	the GPIO number
47  * @flags:	GPIO configuration as specified by GPIOF_*
48  * @label:	a literal description string of this GPIO
50 struct gpio {  struct
51 	unsigned	gpio;  member
59 #include <asm/gpio.h>  argument
62 #include <asm-generic/gpio.h>
64 static inline int gpio_get_value(unsigned int gpio)  in gpio_get_value()  argument
66 	return __gpio_get_value(gpio);  in gpio_get_value()
69 static inline void gpio_set_value(unsigned int gpio, int value)  in gpio_set_value()  argument
71 	__gpio_set_value(gpio, value);  in gpio_set_value()
74 static inline int gpio_cansleep(unsigned int gpio)  in gpio_cansleep()  argument
76 	return __gpio_cansleep(gpio);  in gpio_cansleep()
79 static inline int gpio_to_irq(unsigned int gpio)  in gpio_to_irq()  argument
81 	return __gpio_to_irq(gpio);  in gpio_to_irq()
95 int devm_gpio_request(struct device *dev, unsigned gpio, const char *label);
96 int devm_gpio_request_one(struct device *dev, unsigned gpio,
113 static inline int gpio_request(unsigned gpio, const char *label)  in gpio_request()  argument
118 static inline int gpio_request_one(unsigned gpio,  in gpio_request_one()  argument
124 static inline int gpio_request_array(const struct gpio *array, size_t num)  in gpio_request_array()
129 static inline void gpio_free(unsigned gpio)  in gpio_free()  argument
133 	/* GPIO can never have been requested */  in gpio_free()
137 static inline void gpio_free_array(const struct gpio *array, size_t num)  in gpio_free_array()
141 	/* GPIO can never have been requested */  in gpio_free_array()
145 static inline int gpio_direction_input(unsigned gpio)  in gpio_direction_input()  argument
150 static inline int gpio_direction_output(unsigned gpio, int value)  in gpio_direction_output()  argument
155 static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)  in gpio_set_debounce()  argument
160 static inline int gpio_get_value(unsigned gpio)  in gpio_get_value()  argument
162 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_get_value()
167 static inline void gpio_set_value(unsigned gpio, int value)  in gpio_set_value()  argument
169 	/* GPIO can never have been requested or set as output */  in gpio_set_value()
173 static inline int gpio_cansleep(unsigned gpio)  in gpio_cansleep()  argument
175 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_cansleep()
180 static inline int gpio_get_value_cansleep(unsigned gpio)  in gpio_get_value_cansleep()  argument
182 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_get_value_cansleep()
187 static inline void gpio_set_value_cansleep(unsigned gpio, int value)  in gpio_set_value_cansleep()  argument
189 	/* GPIO can never have been requested or set as output */  in gpio_set_value_cansleep()
193 static inline int gpio_export(unsigned gpio, bool direction_may_change)  in gpio_export()  argument
195 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_export()
201 				unsigned gpio)  in gpio_export_link()  argument
203 	/* GPIO can never have been exported */  in gpio_export_link()
208 static inline void gpio_unexport(unsigned gpio)  in gpio_unexport()  argument
210 	/* GPIO can never have been exported */  in gpio_unexport()
214 static inline int gpio_to_irq(unsigned gpio)  in gpio_to_irq()  argument
216 	/* GPIO can never have been requested or set as input */  in gpio_to_irq()
228 static inline int devm_gpio_request(struct device *dev, unsigned gpio,  in devm_gpio_request()  argument
235 static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,  in devm_gpio_request_one()  argument