void key_init(void)
{
int result;

//omap_cfg_reg(GPIO_TO_PIN(1,22));
/* Allocating GPIOs and setting direction */
result = gpio_request(KEY0, "key");//usr1
if (result != 0)
printk("KEY0 request failed! ");
result = gpio_direction_input(KEY0);
if (result != 0)
printk("KEY0 direction failed! ");

irq_set_irq_type(OMAP_GPIO_IRQ(KEY0),IRQ_TYPE_EDGE_FALLING);//IRQ_TYPE_EDGE_RISING
enable_irq(gpio_to_irq(KEY0));


if(result = request_irq(OMAP_GPIO_IRQ(KEY0), &key_interrupt,0, "key_int", NULL))
{
printk(KERN_INFO"[FALLED: Cannot register Key Interrupt!] ");
}
}