[GIT PULL 1/2] bcm2835-dt-fixes-2017-10-06

Peter Robinson pbrobinson at gmail.com
Wed Nov 1 05:09:14 PDT 2017

On Wed, Nov 1, 2017 at 12:05 PM, Stefan Wahren <stefan.wahren at i2se.com> wrote:
> Hi Matt, hi Peter,
> Am 01.11.2017 um 10:37 schrieb Peter Robinson:
>> On Tue, Oct 31, 2017 at 5:00 PM, Matt Hart <matt at mattface.org> wrote:
>>> On 6 October 2017 at 23:14, Florian Fainelli <f.fainelli at gmail.com> wrote:
>>>> On 10/06/2017 03:05 PM, Eric Anholt wrote:
>>>>> Hi Florian.  Here's a patch that's gone through a couple of revisions
>>>>> on the list, that seriously fixes up the default serial behavior --
>>>>> previously, without the right config.txt/cmdline bits, you'd often end
>>>>> up with a hang with no output before booting completed.  It would be
>>>>> great to get it into 4.14.
>>>>> The following changes since commit 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e:
>>>>>   Linux 4.14-rc1 (2017-09-16 15:47:51 -0700)
>>>>> are available in the git repository at:
>>>>>   git://github.com/anholt/linux tags/bcm2835-dt-fixes-2017-10-06
>>>>> for you to fetch changes up to f08f58a2bf68900a84e782b8c7ad701c0654173c:
>>>>>   ARM: dts: bcm283x: Fix console path on RPi3 (2017-10-06 13:04:56 -0700)
>>>>> ----------------------------------------------------------------
>>>>> This pull request brings in a fix for default serial console setup on
>>>>> RPi3, so it now comes up with no config.txt/cmdline.txt settings in
>>>>> the firmware.
>>>>> ----------------------------------------------------------------
>>>> Merged, thanks Eric
>>>> --
>>>> Florian
>>> Hi all,
>>> I realise this patch has been in mainline for a more than a week, but
>>> I've only recently had time to bisect broken rpi-3 boots in kernelci
>>> and found f08f58a2bf68900a84e782b8c7ad701c0654173c as the cause.
>>> Kernelci boots the rpi3 using uboot, with console=ttyS0 in the command
>>> line which now fails:
>>> https://kernelci.org/boot/id/59f787f059b5147794ef1dcf/
>>> Is there an alias I can use for both before and after this patch?
>>> Mainline boots fine if I use console=ttyS1 or drop the console arg
>>> altogether, but as we don't currently support different boot args per
>>> tree, and we don't have the manpower to track this patch in all the
>>> trees we test, we will have to switch to only boot testing mainline
>>> from now on.
>> Yes, I've seen the same in Fedora with that patch.
> could you please describe the issue more in detail.
> Does u-boot or Linux hang? Does u-boot select the wrong UART? Is there a
> pinmux conflict?

Basically on the RPi3 you use to get ttyAMA0 and ttyS0 but now the
later is ttyS1

> Which u-boot version do you use?


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