On Tue, 12 Oct 2004 14:36:34 -0700, Eugene Surovegin <ebs at ebshome.net> wrote: > Did you use ioremap to get valid kernel virtual address for your > device registers? You generally cannot just use physical address to > access device from the device driver. Possibly also use io_block_mapping on ppc to map a block of IO memory before ioremapping. Jon.