[Letux-kernel] Raspi3B+ support

Belisko Marek marek.belisko at gmail.com
Mon Jan 7 14:42:00 CET 2019


Hi Nikolaus,

On Mon, Jan 7, 2019 at 2:39 PM H. Nikolaus Schaller <hns at goldelico.com>
wrote:

> Hi Marek,
>
> Am 07.01.2019 um 14:32 schrieb Belisko Marek <marek.belisko at gmail.com>:
>
> Hi,
>
> On Mon, Jan 7, 2019 at 2:19 PM H. Nikolaus Schaller <hns at goldelico.com>
> wrote:
>
>> Hi Andreas,
>>
>> > Am 05.01.2019 um 19:48 schrieb Andreas Kemnade <andreas at kemnade.info>:
>> >
>> > Hi,
>> >
>> > On Sat, 5 Jan 2019 08:21:40 +0100
>> > "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
>> >
>> >> Hi Andreas,
>> >>
>> >>> Am 04.01.2019 um 20:27 schrieb Andreas Kemnade <andreas at kemnade.info
>> >:
>> >>>
>> >>> Hi,
>> >>>
>> >>> On Fri, 4 Jan 2019 14:45:47 +0100
>> >>> "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
>> >>>
>> >>>> Hi,
>> >>>> with help and suggestions from Mark, I finally managed
>> >>>> to get our Letux kernel compile and boot on the Raspi3B+.
>> >>>>
>> >>> Do you add -@ to DTC_FLAGS to make handling dtb overlays easier?
>> >>
>> >> You mean something like:
>> >>
>> >>
>> https://github.com/beagleboard/meta-beagleboard/blob/master/common-bsp/recipes-kernel/linux/linux-mainline-3.8/not-capebus/0021-OF-Compile-Device-Tree-sources-with-resolve-option.patch
>> >>
>> > yes.
>> >
>> >> No, since mainline kernel seems not to build or need any overlays
>> >> for RasPi and I am not (yet) aiming at shield/hat/capes. Just a "PC"
>> >> like setup (monitor, keyboard, LAN).
>> >>
>> > Hmm, for a PC-like setup I would choose a standard debian. For a
>> > RasPi with e.g. touchscreen hat I would be happy to just use a letux
>> > system. And remember, someone presented a raspi phone at Fosdem in that
>> > restaurant.
>>
>> There seems to be a Raspi Touchscreen driver in 5.0-rc1:
>>
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.0-rc1&id=0b9f28fed3f70ff9a0380fe308739dd72a30a6f6
>>
>> This means, letux-5.0 will have it without doing much...
>>
>> Well, we still have to get it booting with console :)
>>
> IIRc to have console enabled you need to add enable_uart=1 to config.txt
> file and console should work
>
>
> Yes, that is enabled:
>
> http://download.goldelico.com/letux-u-boot/RasPi-3B+/latest/config.txt
>
> The problem is very different.
>
> For example it works if I install a different DTB (one not compiled from
> sources) and keeping everyhting else untouched.
>
Well there is broadcom firmware which is doing some magic so I maybe
suggest to you linux-raspberrypi (as e.g. meta-raspberrypi is using)
instead of mainline and test with this kernel.

>
> BR,
> Nikolaus
>

BR,

marek

>
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-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
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skype: marekwhite
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