Re: [Buildroot] [PATCH v3 4/4] configs/rock5b: enable uboot-env on the SD card

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

On Wed, 23 Oct 2024 18:35:00 +0000
Niklas Cassel <Niklas.Cassel@wdc.com> wrote:

> I can't use CONFIG_SYS_MMC_ENV_PART.
> 
> If you read the Kconfig help text:
> """
> MMC hardware partition device number on the platform where the
> environment is stored.  Note that this is not related to any software
> defined partition table but instead if we are in the user area, which is
> partition 0 or the first boot partition, which is 1 or some other defined
> partition.
> """
> 
> So CONFIG_SYS_MMC_ENV_PART is about specifying a MMC specific hwpartition,
> which is different from a GPT partition (which is usually stored in a MMC
> "user area" hwpartition).

Ah, indeed!

> I sent a v4 of this patch that uses the uboot feature which automatically
> loads the u-boot environment from a GPT partition which has the
> "u-boot-env" GPT partition type GUID instead:
> https://lore.kernel.org/buildroot/20241023182509.2808544-1-niklas.cassel@wdc.com/

Looks nice, I'll apply this solution. We should use this more globally
in other defconfigs!

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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