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- #ifndef __LINUX_GPIO_H
- #define __LINUX_GPIO_H
-
- /* see Documentation/gpio.txt */
-
- #ifdef CONFIG_GENERIC_GPIO
- #include <asm/gpio.h>
-
- #else
-
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/errno.h>
-
- /*
- * Some platforms don't support the GPIO programming interface.
- *
- * In case some driver uses it anyway (it should normally have
- * depended on GENERIC_GPIO), these routines help the compiler
- * optimize out much GPIO-related code ... or trigger a runtime
- * warning when something is wrongly called.
- */
-
- static inline int gpio_is_valid(int number)
- {
- return 0;
- }
-
- static inline int gpio_request(unsigned gpio, const char *label)
- {
- return -ENOSYS;
- }
-
- static inline void gpio_free(unsigned gpio)
- {
- might_sleep();
-
- /* GPIO can never have been requested */
- WARN_ON(1);
- }
-
- static inline int gpio_direction_input(unsigned gpio)
- {
- return -ENOSYS;
- }
-
- static inline int gpio_direction_output(unsigned gpio, int value)
- {
- return -ENOSYS;
- }
-
- static inline int gpio_get_value(unsigned gpio)
- {
- /* GPIO can never have been requested or set as {in,out}put */
- WARN_ON(1);
- return 0;
- }
-
- static inline void gpio_set_value(unsigned gpio, int value)
- {
- /* GPIO can never have been requested or set as output */
- WARN_ON(1);
- }
-
- static inline int gpio_cansleep(unsigned gpio)
- {
- /* GPIO can never have been requested or set as {in,out}put */
- WARN_ON(1);
- return 0;
- }
-
- static inline int gpio_get_value_cansleep(unsigned gpio)
- {
- /* GPIO can never have been requested or set as {in,out}put */
- WARN_ON(1);
- return 0;
- }
-
- static inline void gpio_set_value_cansleep(unsigned gpio, int value)
- {
- /* GPIO can never have been requested or set as output */
- WARN_ON(1);
- }
-
- static inline int gpio_export(unsigned gpio, bool direction_may_change)
- {
- /* GPIO can never have been requested or set as {in,out}put */
- WARN_ON(1);
- return -EINVAL;
- }
-
- static inline void gpio_unexport(unsigned gpio)
- {
- /* GPIO can never have been exported */
- WARN_ON(1);
- }
-
- static inline int gpio_to_irq(unsigned gpio)
- {
- /* GPIO can never have been requested or set as input */
- WARN_ON(1);
- return -EINVAL;
- }
-
- static inline int irq_to_gpio(unsigned irq)
- {
- /* irq can never have been returned from gpio_to_irq() */
- WARN_ON(1);
- return -EINVAL;
- }
-
- #endif
-
- #endif /* __LINUX_GPIO_H */
-