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#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <asm/irq.h>
#include <asm/io.h>
static void button_interrupt(int irq, void *dummy, struct pt_regs *fp)
{
input_report_key(&button_dev, BTN_1, inb(BUTTON_PORT) & 1);
input_sync(&button_dev);
}
static int __init button_init(void)
{
if (request_irq(BUTTON_IRQ, button_interrupt, 0, "button", NULL)) {
printk(KERN_ERR "button.c: Can't allocate irq %d\n", button_irq);
return -EBUSY;
}
button_dev.evbit[0] = BIT(EV_KEY);
button_dev.keybit[LONG(BTN_0)] = BIT(BTN_0);
input_register_device(&button_dev);
}
static void __exit button_exit(void)
{
input_unregister_device(&button_dev);
free_irq(BUTTON_IRQ, button_int
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