Messages in this thread | | | Date | Wed, 20 May 2015 23:22:24 +0200 | From | Alexandre Belloni <> | Subject | Re: [PATCH] ARM: multi_v7_defconfig: Add Atmel SAMA5 family |
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Hi,
On 20/05/2015 at 10:18:16 -0500, Robert Nelson wrote : > On Wed, May 20, 2015 at 9:08 AM, Alexandre Belloni > <alexandre.belloni@free-electrons.com> wrote: > > Hi, > > > > On 20/05/2015 at 06:53:50 -0700, Kevin Hilman wrote : > >> FYI... This patch is now in linux-next, and boot tests for all the > >> sama5d[34] boards in kernelci.org have failed to boot. > >> > >> http://kernelci.org/boot/all/job/next/kernel/next-20150520/ > >> > > > > Hum, I'm pretty sure you see the heartbeat led blinking ;) > > > > I think I told you a while ago on IRC and this is part of the commit > > message. You have to use ttyAT0 instead of ttyS0 in your bootargs. I'm > > not sure how I can make that more obvious, I'm open to any idea. > > > > I'm planning to send a series adding stdout-path to the atmel boards > > when I'm back next week. Hopefully this will solve that issue. > > Alexandre, > > considering all the old boot-loaders, have you thought about adding a > compatibility config similar to: > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=00648d0282dcca1da453c0b20d27e24bf901a854 >
We are not there yet. sama5_defconfig and at91_dt_defconfig will still produce kernels using ttyS and not ttyAT. The switch will not happen until you set CONFIG_SERIAL_ATMEL_TTYAT which has been present since 2.6.19. The issue is that it is mandatory to use it in a multi_v7 configuration because the 8250 driver is compiled in and is conflicting.
Kevin and Tyler jumped on the introduction of sama5 in multi_v7 and got the issue. As long as you stick to the at91 only configurations, you will be fine ;) I hope this clarifies the thing :)
-- Alexandre Belloni, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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