include/minix/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 };
   9
  10 #define GPIO_MODE_INPUT 0
  11 #define GPIO_MODE_OUTPUT 1
  12
  13 int gpio_init();
  14
  15 /* request access to a gpio */
  16 int gpio_claim(char *owner, int nr, struct gpio **gpio);
  17
  18 /* Configure the GPIO for a certain purpose */
  19 int gpio_pin_mode(struct gpio *gpio, int mode);
  20
  21 /* Set the value for a GPIO */
  22 int gpio_set(struct gpio *gpio, int value);
  23
  24 /* Read the current value of the GPIO */
  25 int gpio_read(struct gpio *gpio, int *value);
  26
  27 /* Read and clear the value interrupt value of the GPIO */
  28 int gpio_intr_read(struct gpio *gpio, int *value);
  29
  30 /* Interrupt hook */
  31 int gpio_intr_message(message * m);
  32
  33 int gpio_release();
  34 #endif /* __INCLUDE_GPIO_H__ */