4 /* see Documentation/gpio.txt */
6 #ifdef CONFIG_GENERIC_GPIO
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/errno.h>
18 * Some platforms don't support the GPIO programming interface.
20 * In case some driver uses it anyway (it should normally have
21 * depended on GENERIC_GPIO), these routines help the compiler
22 * optimize out much GPIO-related code ... or trigger a runtime
23 * warning when something is wrongly called.
26 static inline int gpio_is_valid(int number)
31 static inline int gpio_request(unsigned gpio, const char *label)
36 static inline void gpio_free(unsigned gpio)
40 /* GPIO can never have been requested */
44 static inline int gpio_direction_input(unsigned gpio)
49 static inline int gpio_direction_output(unsigned gpio, int value)
54 static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
59 static inline int gpio_get_value(unsigned gpio)
61 /* GPIO can never have been requested or set as {in,out}put */
66 static inline void gpio_set_value(unsigned gpio, int value)
68 /* GPIO can never have been requested or set as output */
72 static inline int gpio_cansleep(unsigned gpio)
74 /* GPIO can never have been requested or set as {in,out}put */
79 static inline int gpio_get_value_cansleep(unsigned gpio)
81 /* GPIO can never have been requested or set as {in,out}put */
86 static inline void gpio_set_value_cansleep(unsigned gpio, int value)
88 /* GPIO can never have been requested or set as output */
92 static inline int gpio_export(unsigned gpio, bool direction_may_change)
94 /* GPIO can never have been requested or set as {in,out}put */
99 static inline int gpio_export_link(struct device *dev, const char *name,
102 /* GPIO can never have been exported */
107 static inline int gpio_sysfs_set_active_low(unsigned gpio, int value)
109 /* GPIO can never have been requested */
114 static inline void gpio_unexport(unsigned gpio)
116 /* GPIO can never have been exported */
120 static inline int gpio_to_irq(unsigned gpio)
122 /* GPIO can never have been requested or set as input */
127 static inline int irq_to_gpio(unsigned irq)
129 /* irq can never have been returned from gpio_to_irq() */
136 #endif /* __LINUX_GPIO_H */