On Wed, Oct 13, 2004 at 12:03:21AM +0100, Jon Masters wrote: > 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.
Yes, this is possible but considered obsoleted and not-recommended way of accessing device registers. -- Eugene
