Hi clemens.koller? I have configed the CONFIG_WANT_EARLY_SERIAL for the 2.6.14 kernel,but I still didn't see nothing output on the serial port . I have some doubts, 1, Linux kernel 2.4.25 can work well with the same U-Boot and board as Linux kernel 2.6.14, what is the different with the serial port driver between these ? 2.The command line ,U-Boot sends command line to the kernel ,like as "baudrate ,root ....". In the linux kernel 2.6.14,"make menuconfig ,platform ->default bootloader kernel argument",I config the console as the same as the U-boot , but it was fail .Didn't config it ,it was still fail .
I have measured the pin of the serial port , no purse output. I checked the CS (chip select ) pin of the SDRAM (where is the linux kernel implementation), the pin has purses when the serial port with nothing ,so I thought the linux kernel was running ,but the serial port was fail ........ Now , maybe I will check the kernel code to trace the problem . Thanks for your patience. If you have some advices ,please let me know .Thank you ! ??zjznliang ????zjznliang_popo at 163.com ??????2005-11-21