Re: [PATCH 5/6] tty: serial: Add linflexuart driver for S32V234

[Stefan-gabriel Mirea <stefan-gabriel.mirea@nxp.com>]

On 8/9/2019 12:53 PM, Will Deacon wrote:
> On Fri, Aug 09, 2019 at 09:45:40AM +0000, Stefan-gabriel Mirea wrote:
>> On 8/8/2019 8:17 PM, Will Deacon wrote:
>>> On Thu, Aug 08, 2019 at 12:47:00PM +0000, Stefan-gabriel Mirea wrote:
>>>> On 8/8/2019 11:08 AM, Will Deacon wrote:
>>>>> On Fri, Aug 02, 2019 at 07:47:23PM +0000, Stefan-gabriel Mirea wrote:
>>>>>> +             linflex,<addr>
>>>>>> +                     Use early console provided by Freescale LinFlex UART
>>>>>> +                     serial driver for NXP S32V234 SoCs. A valid base
>>>>>> +                     address must be provided, and the serial port must
>>>>>> +                     already be setup and configured.
>>>>>
>>>>> Why isn't earlycon= sufficient for this?
>>>>
>>>> "earlycon=" is not actually supported. I will fix this in the next
>>>> version by adding a /chosen/stdout-path to the dts. The compatible
>>>> string provided to OF_EARLYCON_DECLARE will also be changed from
>>>> "fsl,s32v234-linflexuart" to "fsl,s32-linflexuart" to match the one in
>>>> the device tree nodes. I missed this after importing a rename from our
>>>> codebase.
>>>>
>>>> Should I remove this addition from kernel-parameters.txt after that?
>>>
>>> Yes, if you can use earlycon instead, then you can drop your custom option
>>> entirely and therefore there's no need to document it either.
>>
>> Can you please clarify what you mean by "drop your custom option"? The
>> "linflex" option documented in the paragraph is the name of the
>> earlycon_id declared via "OF_EARLYCON_DECLARE(linflex, ...)". We have
>> not done anything particular to accept it in the parameter value.
> 
> My apologies, I completely misread your patch and thought your were adding
> a *new* kernel parameter. Having looked at the context, I now see you're
> adding a new earlycon option, which is what I was suggesting :)
> 
> By all means, please update the stdout-path, because then you can just pass
> "earlycon" and things will work as expected.

No problem, I will submit the new version soon. Thank you!

Regards,
Stefan