Hi, As I understood from the source code (4.4.3), the Samsung RTC driver rtc-s3c.c is an OF or DT style driver. It means probably that I cannot use it by simply defining a platform device in my board file. Actually, I found out this after I did that and then didn't see the RTC drive's probe method got called as I expected. Then my question comes, how can I use the RTC driver to active the RTC device w/o involving the complexity of DTD loading at this moment? Since I cannot change the boot loader, so I have no an easier way to load DTD to the kernel as that usually suggested in the documents I googled. Can I use a statically defined device node in my board file? I only concern the RTC device at this moment, so I think this is the easiest way to go for my situation. Would someone please give out suggestions and even a simple how-to? Best Regards, -woody -- Life is the only flaw in an otherwise perfect nonexistence -- Schopenhauer woody public key at http://subkeys.pgp.net:11371 (narkewoody@gmail.com)