The problem (in my case) is that the legacy-serial driver doesn't accept all of the 16550 configurations accepted by the regular ns16550 driver. The problem is not related to simple-bus, but only became visible when simple-bus bindings are used because the legacy-serial driver specifically looks for an ns16550 node contained by a simple-bus.
Most likely the hpcn_defconfig disables the legacy-serial driver altogether. Steve > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:linuxppc-dev- > [EMAIL PROTECTED] On Behalf Of Scott Wood > Sent: Wednesday, August 06, 2008 10:36 AM > To: [EMAIL PROTECTED] > Cc: ppc-dev list > Subject: Re: hang w/ppc6xx_defconfig related to 'simple-bus' compatible > > On Wed, Aug 06, 2008 at 07:41:28AM -0600, Grant Likely wrote: > > On Tue, Aug 05, 2008 at 08:21:31AM -0500, Kumar Gala wrote: > > > I'm trying to get the ppc6xx_defconfig booting on any 8641 (74xx/e600) > > > system. If I remove the 'simple-bus' compatible from the soc node in > > > the .dts it works. Otherwise it hangs at but and looks to be crashed in > > > the serial driver due to accessing memory at 0. > > > > > > I've tried the same .dts (w/'simple-bus') using the > > > mpc8641_hpcn_defconfig and things work. > > > > The Xilinx folks hit something similar. ns16550 nodes get matched if > > the parent claims simple-bus. If extra stuff needs to be done to use > > that port, then bad things happen. > > If extra stuff needs to be done, it shouldn't claim to be a simple-bus. > > -Scott > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
