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¼üÅÌÇý¶¯½«¼ì²âµ½µÄËùÓа´¼ü¶¼Éϱ¨¸øÁËinput×Óϵͳ¡£Input×ÓϵͳÊÇËùÓÐI/OÉ豸Çý¶¯µÄÖмä²ã£¬ÎªÉϲãÌṩÁËÒ»¸öͳһµÄ½çÃæ¡£ÀýÈ磬ÔÚÖÕ¶ËϵͳÖУ¬ÎÒÃDz»ÐèҪȥ¹ÜÓжàÉÙ¸ö¼üÅÌ£¬¶àÉÙ¸öÊó±ê¡£ËüÖ»Òª´Óinput×ÓϵͳÖÐȥȡ¶ÔÓ¦µÄʼþ(°´¼ü£¬Êó±êÒÆÎ»µÈ)¾Í¿ÉÒÔÁË¡£
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ÏÂÃæµÄ´úÂëÊÇ»ùÓÚlinux kernel 2.6.25.·ÖÎöµÄ´úÂëÖ÷ҪλÓÚkernel2.6.25/drivers/inputÏÂÃæ.
ÔÚÄÚºË×Ô´øµÄÎĵµDocumentation/input/input-programming.txtÖС£ÓÐÒ»¸öʹÓÃinput×ÓϵͳµÄÀý×Ó£¬²¢¸½´øÏàÓ¦µÄ˵Ã÷¡£ÒÔ´ËΪÀý·ÖÎöÈçÏ£º
#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)
{
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