3.输入子系统

input.c

/* 参考drivers\input\keyboard\gpio_keys.c */

#include <linux/module.h>
#include <linux/version.h>

#include <linux/init.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/irq.h>

#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/regs-gpio.h>

struct pin_desc{
	int irq;
	char *name;
	unsigned int pin;
	unsigned int key_val;
};

struct pin_desc pins_desc[4] = {
	{IRQ_EINT0,  "S2", S3C2410_GPF0,   KEY_L},
	{IRQ_EINT2,  "S3", S3C2410_GPF2,   KEY_S},
	{IRQ_EINT11, "S4", S3C2410_GPG3,   KEY_ENTER},
	{IRQ_EINT19, "S5",  S3C2410_GPG11, KEY_LEFTSHIFT},
};

static struct input_de