[meta-intel] Atom E3826 storage that survives over reboot

[Burton, Ross]

EFI variables should work?

Ross

On Tue, 22 Jan 2019 at 08:20, Teemu K <maillinglists18 at gmail.com> wrote:
>
> Hi,
>
> Not exactly Yocto related, but was wondering if anyone have (new) ideas here.
>
> I have HW that has Congate TCA-3 board with Atom E3826 processor
> running Linux and there is need to relay information from Linux to
> bootloader for next warm boot. I only need few bytes. This information
> is used to determine if to boot secondary system on device or if to
> execute factory reset etc.
>
> Any idea where/how to store the information so it'd be (somewhat)
> easily accessible in bootloader(grub)? Congatec has their own CGOS
> system, but it's way too big for this job and doesn't work outside
> Linux. I'm not entirely sure if writing to RAM is good idea ie. can it
> lose it content on reboot?
>
> Of course generic approach would be nice, but Atom E3826 specific is
> also fine atm.
>
> -TeemuK
> --
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