S35390A时钟芯片在linux下的驱动程序，本人应用在s3c440上，I2C接口，比S3C2440内部自带RTC更剩电，更准确。-S35390A clock chip drivers under linux, I applied s3c440 on, I2C interface, more than S3C2440 RTC own internal power left, more accurate.