[U-Boot] [PATCH] ARM: tegra: enable STDIO deregistration

[Simon Glass]

Hi Stephen,

On 13 April 2015 at 13:17, Stephen Warren <swarren at wwwdotorg.org> wrote:
> On 04/13/2015 11:22 AM, Simon Glass wrote:
>>
>> Hi Stephen,
>>
>> On 13 April 2015 at 11:11, Stephen Warren <swarren at wwwdotorg.org> wrote:
>>>
>>> From: Stephen Warren <swarren at nvidia.com>
>>>
>>> At the very least when USB keyboard support is enabled, we need to enable
>>> CONFIG_SYS_STDIO_DEREGISTER, so the "usb reset" is able to re-scan USB
>>> ports and find new devices.
>>>
>>> Signed-off-by: Stephen Warren <swarren at nvidia.com>
>>> ---
>>> This feels like a nice fix for the upcoming release if possible. Even if
>>> this causes horrible fallout (which I do not expect), it'll only affect
>>> Seaboard and Ventana boards, both of which have quite limited
>>> distribution.
>>
>>
>> Reviewed-by: Simon Glass <sjg at chromium.org>
>>
>> I wonder whether you might want to (post-release) enable this always
>> on Tegra, except for SPL?
>
>
> Was that referring to CONFIG_SYS_STDIO_DEREGISTER or USB keyboard support? I
> suspect we should simply enable USB keyboard support everywhere, since most
> systems don't have built-in keyboards? It's certainly missing from devices
> like Trimslice that need it. Or would you rather only enable keyboard
> support on devices without a keyboard, and enable
> CONFIG_SYS_STDIO_DEREGISTER everywhere?

I was thinking of the latter - enable CONFIG_SYS_STDIO_DEREGISTER
everywhere. Removing this is only a small win, and is mostly intended
for SPL.

Regards,
Simon