Re: [PATCH 2/9] soc: imx8mp: Soc ID is 128bit

[Sascha Hauer <s.hauer@pengutronix.de>]

On Fri, Nov 14, 2025 at 05:22:13PM +0100, Marco Felsch wrote:
> Hi Sascha,
> 
> On 25-11-13, Sascha Hauer wrote:
> > On i.MX8MP the SoC ID has 128 bits instead of 64 bits as on other i.MX8M
> > SoCs. Read the remaining 64 bits which so far haven't been included in
> > the SoC ID.
> 
> Linux fixed this as well in a non-backward compatible way. Don't get me
> wrong this is the correct fix and we should fix it, but this change will
> certainly influence in-field systems badly which rely on the the current
> behavior e.g. to set the `systemd.machine` or which make use of the UID
> to construct a hostname which is later on passed to the kernel cmdline
> via `systemd.hostname`.
> 
> These systems now need to revert this change to archieve the same system
> behavior. Can we add a Kconfig option or some function which can set the
> soc_uid limit to keep these systems working.

Yes, I've written about it in the cover letter.

Sascha

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