drivers/gpio/gpio.h

   1 #ifndef __INCLUDE_GPIO_H__
   2 #define __INCLUDE_GPIO_H__
   3
   4 struct gpio
   5 {
   6         int nr;                 /* GPIO number */
   7         int mode;               /* GPIO mode (input=0/output=1) */
   8         void *data;             /* data pointer (not used in the omap driver) */
   9 };
  10
  11 #define GPIO_MODE_INPUT 0
  12 #define GPIO_MODE_OUTPUT 1
  13
  14 struct gpio_driver
  15 {
  16         /* request access to a gpio */
  17         int (*claim) (char *owner, int nr, struct gpio ** gpio);
  18
  19         /* Configure the GPIO for a certain purpose */
  20         int (*pin_mode) (struct gpio * gpio, int mode);
  21
  22         /* Set the value for a GPIO */
  23         int (*set) (struct gpio * gpio, int value);
  24
  25         /* Read the value of the GPIO */
  26         int (*read) (struct gpio * gpio, int *value);
  27 };
  28
  29 int omap_gpio_init(struct gpio_driver *gpio_driver);
  30 #endif /* __INCLUDE_GPIO_H__ */