S3C2440上RTC时钟驱动,通常在Linux中，把SOC系统中集成的独立外设单元(如：I2C、IIS、RTC、看门狗等)都被当作平台设备来处理。-S3C2440 RTC clock driver, usually in Linux, SOC system integration of independent peripheral units (such as: the I2C, the IIS, the RTC, Watchdog, etc.) are as a platform devic