[Letux-kernel] patchset enable distro support

Josua Mayer josua.mayer at jm0.eu
Tue Apr 18 10:33:55 CEST 2017


Hi Andreas,

Am 17.04.2017 um 23:55 schrieb Andreas Kemnade:
> Hi,
>
> On Mon, 17 Apr 2017 21:35:50 +0200
> Josua Mayer <josua.mayer at jm0.eu> wrote:
>
>> Hi everybody,
>>
>> Here comes another patch for this set. It passes on the console=ttyO2
>> cmdline option as part of devicetree.
>> This is mostly useful because grub has no way of coming up with this
>> option on its own.
>>
>> Now it is completely sufficient to launch linux from grub using just
>> *one* cmdline option, namely root=, and still get a working console on
>> serial!!!!
>>
> and what if I do not want that? Can the console cmdline option still
> override/influence that?
Yes. I just validated this on the debian 4.9 kernel (where there is no
builtin cmdline).
> I personally use just framebuffer console often. Then I can see what
> happens during boot if the case is not open. Serial console is
> of course important if you want to do intense debugging on your desk at
> home.
I find that booting linux is almost always intense debugging by itself.
>
> Regards,
> Andreas
>
>
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