[U-Boot] [PATCH] embestmx6boards: Increase boot delay to 3s

[Iain Paton <ipaton0@gmail.com>]

On 13/12/14 17:03, Eric B?nard wrote:
> Hi Nikolay,
> 
> Le Sat, 13 Dec 2014 18:05:15 +0200,
> Nikolay Dimitrov <picmaster@mail.bg> a ?crit :
>> On 12/13/2014 04:16 PM, Eric B?nard wrote:

>>> This will increase the boot time by 2 seconds : why is that needed ?
>>
>> Thanks for commenting. My intent is to give by default a reasonable
>> time for the end-user to react and break the boot-sequence if needed
>> (and avoid the nasty racing against the clock for this precious
>> key-press).
>>
>> My motivation for this is that I see RIoTboard/MarsBoard mostly as
>> boards that people can use for experimentation/prototyping, and not as
>> a finished end-product, thus my thinking that the slightly increased
>> boot-time won't be a critical issue for such applications. Still
>> everyone can change the delay at will if they want to optimize the boot.
>>
>> Other hobby boards also have similarly handy boot-timings, like
>> Wandboard (5s), Novena (5s), Udoo (3s).
>>
> OK seems reasonable.

I disagree. I think it's an unnecessary, unneeded, unreasonable tripling 
of the boot time.

Rather than leaving people to patch out this unwanted behaviour, I'd suggest 
promoting CONFIG_BOOTDELAY into a Kconfig option, leaving the default as-is.

This allows the people who want it to configure it easily.

In any case the rationale given, that the Riotboard is a dev board used for
experimenting, doesn't imply a change like this one. It implies a conversion 
to use config_distro_bootcmd.h like the patches I've just posted.
This also leads to a slightly less unreasonable increase in bootdelay to 2s 
from config_distro_defaults.h

Using config_distro_bootcmd also means that we can largely ignore the u-boot 
shell altogether and just use extlinux.conf instead