[U-Boot] DM-SERIAL-SPL on MX6

[Sébastien Szymanski]

On 06/07/2018 10:35 AM, Hannes Schmelzer wrote:
> On 06/07/2018 09:50 AM, Sébastien Szymanski wrote:
>> Hi,
> Hi Sébastien,
>>
>> On 06/07/2018 09:14 AM, Jagan Teki wrote:
>>> + Add few imx maintainers
>>>
>>> On Thu, Jun 7, 2018 at 12:25 PM, Hannes Schmelzer
>>> <hannes at schmelzer.or.at> wrote:
>>>> hi,
>>>>
>>>> i'm actually trying to convert my i.mx6 boards to DM, many things are
>>>> already doing well.
>>>> But I've trouble getting the console (UART) runnin SPL.
>>>>
>>>> The "preloader_console_init" is called very early in board_init_f, i
>>>> guess
>>>> that DM isn't ready at this point.
>>>>
>>>> has anyone experience in this?
>>> Yes I've faced the same, look like DEBUG Uart doesn't support low
>>> level init. Peng or someone can explain more.
>> When converting the OPOS6UL to DM, I had to move the
>> preloader_console_init call into the spl_board_init function.
> thanks for this hint, i also tried this. But unfortunately without success.
> But it is good to know that this way on your side works.
> 
> what i've done to try make it work:
> 
> add to my dts:
>     chosen {
>         stdout-path = &uart1;
>     };
> 
> &uart1 {
>     u-boot,dm-spl;
>     u-boot,dm-preloc;
>     status = "okay";
> };

Don't you need pins muxing properties in uart1 ( pinctrl-names /
pinctrl-0 ) ?

> 
> so the device should be present during spl stage and console should be
> set to it.
> 
> # Serial drivers
> #
> CONFIG_BAUDRATE=115200
> CONFIG_SERIAL_PRESENT=y
> CONFIG_SPL_SERIAL_PRESENT=y
> CONFIG_DM_SERIAL=y
> CONFIG_SPL_DM_SERIAL=y
> CONFIG_MXC_UART=y
> 
> maybe i'm still missing something.
> 


-- 
Sébastien Szymanski
Software engineer, Armadeus Systems
Tel: +33 (0)9 72 29 41 44
Fax: +33 (0)9 72 28 79 26