1 /* SPDX-License-Identifier: GPL-2.0 */
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 /* make these flag values available regardless of GPIO kconfig options */
24 /* Gpio pin is active-low */
28  * struct gpio - a structure describing a GPIO with configuration
29  * @gpio:	the GPIO number
30  * @flags:	GPIO configuration as specified by GPIOF_*
31  * @label:	a literal description string of this GPIO
33 struct gpio {  struct
34 	unsigned	gpio;  argument
41 #include <linux/gpio/consumer.h>  argument
44  * "valid" GPIO numbers are nonnegative and may be passed to
48  * Invalid GPIO numbers are useful for indicating no-such-GPIO in
53 	/* only non-negative numbers are valid */  in gpio_is_valid()
58  * Platforms may implement their GPIO interface with library code,
59  * at a small performance cost for non-inlined operations and some
60  * extra memory (for code and for per-GPIO table entries).
66  * Until they are all fixed, leave 0-512 space for them.
70  * Define the maximum of the possible GPIO in the global numberspace.
71  * While the GPIO base and numbers are positive, we limit it with signed
76 /* Always use the library code for GPIO management calls,
79 int gpio_request(unsigned gpio, const char *label);
80 void gpio_free(unsigned gpio);
82 static inline int gpio_direction_input(unsigned gpio)  in gpio_direction_input()  argument
84 	return gpiod_direction_input(gpio_to_desc(gpio));  in gpio_direction_input()
86 static inline int gpio_direction_output(unsigned gpio, int value)  in gpio_direction_output()  argument
88 	return gpiod_direction_output_raw(gpio_to_desc(gpio), value);  in gpio_direction_output()
91 static inline int gpio_get_value_cansleep(unsigned gpio)  in gpio_get_value_cansleep()  argument
93 	return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio));  in gpio_get_value_cansleep()
95 static inline void gpio_set_value_cansleep(unsigned gpio, int value)  in gpio_set_value_cansleep()  argument
97 	return gpiod_set_raw_value_cansleep(gpio_to_desc(gpio), value);  in gpio_set_value_cansleep()
100 static inline int gpio_get_value(unsigned gpio)  in gpio_get_value()  argument
102 	return gpiod_get_raw_value(gpio_to_desc(gpio));  in gpio_get_value()
104 static inline void gpio_set_value(unsigned gpio, int value)  in gpio_set_value()  argument
106 	return gpiod_set_raw_value(gpio_to_desc(gpio), value);  in gpio_set_value()
109 static inline int gpio_to_irq(unsigned gpio)  in gpio_to_irq()  argument
111 	return gpiod_to_irq(gpio_to_desc(gpio));  in gpio_to_irq()
114 int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);
116 int devm_gpio_request(struct device *dev, unsigned gpio, const char *label);
117 int devm_gpio_request_one(struct device *dev, unsigned gpio,
132 static inline int gpio_request(unsigned gpio, const char *label)  in gpio_request()  argument
134 	return -ENOSYS;  in gpio_request()
137 static inline int gpio_request_one(unsigned gpio,  in gpio_request_one()  argument
140 	return -ENOSYS;  in gpio_request_one()
143 static inline void gpio_free(unsigned gpio)  in gpio_free()  argument
147 	/* GPIO can never have been requested */  in gpio_free()
151 static inline int gpio_direction_input(unsigned gpio)  in gpio_direction_input()  argument
153 	return -ENOSYS;  in gpio_direction_input()
156 static inline int gpio_direction_output(unsigned gpio, int value)  in gpio_direction_output()  argument
158 	return -ENOSYS;  in gpio_direction_output()
161 static inline int gpio_get_value(unsigned gpio)  in gpio_get_value()  argument
163 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_get_value()
168 static inline void gpio_set_value(unsigned gpio, int value)  in gpio_set_value()  argument
170 	/* GPIO can never have been requested or set as output */  in gpio_set_value()
174 static inline int gpio_get_value_cansleep(unsigned gpio)  in gpio_get_value_cansleep()  argument
176 	/* GPIO can never have been requested or set as {in,out}put */  in gpio_get_value_cansleep()
181 static inline void gpio_set_value_cansleep(unsigned gpio, int value)  in gpio_set_value_cansleep()  argument
183 	/* GPIO can never have been requested or set as output */  in gpio_set_value_cansleep()
187 static inline int gpio_to_irq(unsigned gpio)  in gpio_to_irq()  argument
189 	/* GPIO can never have been requested or set as input */  in gpio_to_irq()
191 	return -EINVAL;  in gpio_to_irq()
194 static inline int devm_gpio_request(struct device *dev, unsigned gpio,  in devm_gpio_request()  argument
198 	return -EINVAL;  in devm_gpio_request()
201 static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,  in devm_gpio_request_one()  argument
205 	return -EINVAL;  in devm_gpio_request_one()