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_get_value(unsigned gpio
)
56 /* GPIO can never have been requested or set as {in,out}put */
61 static inline void gpio_set_value(unsigned gpio
, int value
)
63 /* GPIO can never have been requested or set as output */
67 static inline int gpio_cansleep(unsigned gpio
)
69 /* GPIO can never have been requested or set as {in,out}put */
74 static inline int gpio_get_value_cansleep(unsigned gpio
)
76 /* GPIO can never have been requested or set as {in,out}put */
81 static inline void gpio_set_value_cansleep(unsigned gpio
, int value
)
83 /* GPIO can never have been requested or set as output */
87 static inline int gpio_export(unsigned gpio
, bool direction_may_change
)
89 /* GPIO can never have been requested or set as {in,out}put */
94 static inline int gpio_export_link(struct device
*dev
, const char *name
,
97 /* GPIO can never have been exported */
102 static inline int gpio_sysfs_set_active_low(unsigned gpio
, int value
)
104 /* GPIO can never have been requested */
109 static inline void gpio_unexport(unsigned gpio
)
111 /* GPIO can never have been exported */
115 static inline int gpio_to_irq(unsigned gpio
)
117 /* GPIO can never have been requested or set as input */
122 static inline int irq_to_gpio(unsigned irq
)
124 /* irq can never have been returned from gpio_to_irq() */
131 #endif /* __LINUX_GPIO_H */
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