Re: Getting serial console output on new imx7d tqma7 board UART4

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Hello,

On 8/5/20 1:12 PM, Lars Pedersen wrote:
>> Text base is ignored, when you are relocatable. If you aren't relocatable,
>> you need a valid address as your text base. Why did you turn it off?
> 
> I didn't turn it off. It isn't selected by MACH_FREESCALE_MX7_SABRESD
> so it gets turned off if only this board is used. It is selected by 6
> other boards, which is the reason it works when compiling for all
> boards.

I don't think that's how it works. If it was =y and the select went
away because of CONFIG_MACH_CCMX51=n, it remains at =y. I just tested
it and that's the behavior I observed.


I am not sure what we could do better here. You can use barebox
as non-relocatable binary if you set CONFIG_TEXT_BASE to a sensible
value. You might want this if you are keen on reducing barebox size
further at cost of portability. So having a select here to ensure
it's always set won't work.

We can also not set a suitable CONFIG_TEXT_BASE at Kconfig level,
because, due to multi-image support, we may be building different
boards with different TEXT_BASEs...

We could have RELOCATABLE be default y as it's a more sensible default
though. Sascha, what do you think?

> 
>  Symbol: RELOCATABLE [=y]
>  Type  : bool
>  Defined at common/Kconfig:336
>    Prompt: generate relocatable barebox binary
>    Depends on: PPC || ARM [=y]
>    Location:
>  (2) -> General Settings
>  Selected by [y]:
>    - MACH_CCMX51 [=y] && ARCH_IMX [=y] && IMX_MULTI_BOARDS [=y]
>  Selected by [n]:
>    - ARCH_BCM283X [=n] && <choice>
>    - ARCH_TEGRA [=n] && <choice>
>    - ARCH_ZYNQMP [=n] && <choice>
>    - MACH_VEXPRESS [=n] && <choice>
>    - ARCH_ZYNQ7000 [=n] && ARCH_ZYNQ [=n]
> 
> 
>>
>> Cheers,
>> Ahmad
>>
>> --
>> Pengutronix e.K.                           |                             |
>> Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
>> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
>> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
> 

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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