[U-Boot] [PATCH] arm: socfpga: control reboot from SRAM via env callback

[Simon Goldschmidt]

On 03.05.19 22:35, Marek Vasut wrote:
> On 5/3/19 10:30 PM, Simon Goldschmidt wrote:
>>
>>
>> On 03.05.19 22:28, Marek Vasut wrote:
>>> On 5/3/19 10:08 PM, Simon Goldschmidt wrote:
>>>> This moves the code that enables the Boot ROM to just jump to SRAM
>>>> instead
>>>> of loading SPL from the original boot source on warm reboot.
>>>>
>>>> Instead of always enabling this, an environment callback for the env var
>>>> "socfpga_reboot_from_sram" is used. This way, the behaviour can be
>>>> enabled
>>>> at runtime and via saved environment.
>>>>
>>>> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>
>>>
>>> Would that be like a default "reset" command action ?
>>> This probably shouldn't be socfpga specific then.
>>
>> No, it's a thing that lives on and influences even the soft reset issued
>> by linux "reboot" command. This is something *very* socfpga specific.
> 
> Hmmm, so isn't this a policy to be configured on the Linux end ?

Might be, but it affects U-Boot's 'reset' command as well. And I guess 
it's set up in U-Boot this early to ensure it always works.

If it were for me, we could drop writing this magic altogether. I just 
figured some boards might require it to be written somewhere, and came 
up with a patch that might save those boards with the way it was before.

Regards,
Simon