arm11开发板 按键驱动

按键驱动代码 static int nr = 4; module_param(nr, int, 0400); MODULE_LICENSE("GPL"); static unsigned long gpndat = 0xF4500834; static struct input_dev *dev; static irqreturn_t key_handler(int irqno, void *arg) { int index = (int)arg; unsigned int code; unsigned long reg32; /* printk("[%