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

[Jagan Teki <jagannadh.teki@gmail.com>]

On Thu, Jun 7, 2018 at 4:35 PM, Hannes Schmelzer <hannes@schmelzer.or.at> wrote:
>
>>>>>> 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.
>
> Finally converting the tips from Sebastian in addition with converting
> "CONFIG_SPL_BOARD_INIT" to Kconfig did the trick.
> Don't know why there is a difference, but doesn't matter since defining such
> stuff in board-config-header is deprecated.

imx6ul seems working for me with DM_SERIAL, i.MX6QDL has still not
getting console.