gpio_pin_op
struct gpio_pin_op *op;
op = (struct gpio_pin_op *)data;
op = (struct gpio_pin_op *)data;
op = (struct gpio_pin_op *)data;
#define GPIOPINREAD _IOWR('G', 1, struct gpio_pin_op)
#define GPIOPINWRITE _IOWR('G', 2, struct gpio_pin_op)
#define GPIOPINTOGGLE _IOWR('G', 3, struct gpio_pin_op)
struct gpio_pin_op op;
struct gpio_pin_op op;