static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_usb, /* arch/arm/mach-s3c2440/mach-smdk2440.c */
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c0,
&s3c_device_iis,
&s3c_device_rtc,
};
驱动实现：
配置内核，加入RTC驱动支持
Devide drivers --->
<*> Real Time Clock --->
<*> Samsung S3C series SoC RTC
测试：
# cat /proc/devices 查看rtc设备号
# ls –l /dev/rtc
crw-r--r-- 1 root root 254, 0 Jan 1 1970 /dev/rtc
lrwxr--r-- 1 root root 3Jan 1 1970 /dev/rtc0 -> rtc
date –s 072021352011 设置系统时间为2011-07-20 21:35
hwclock –w 把刚设置的系统时间存入RTC
开机时使用hwclock –s把RTC时间恢复到系统时间
hwclock参数说明：
Options:
-r Show hardware clock time
-s Set system time from hardware clock
-w Set hardware clock to system time
-u Hardware clock is in UTC
-l Hardware clock is in local time
-f FILE Use specified device (e.g. /dev/rtc2)