Re: [PATCH v4 1/2] arm64: dts: lx2160a: update PCIe nodes to match rev2 silicon

Olof Johansson
2022-09-12T07:05:30Z

Hi,

On Wed, Aug 17, 2022 at 1:26 PM Li Yang <leoyang.li@nxp.com> wrote:
>
> The original dts was created based on the non-production rev1 silicon
> which was only used for evaluation. Update the PCIe nodes to align with
> the different controller used in production rev2 silicon.

How can I confirm what version of silicon I have on a system?

My non-evaluation commercially purchased system (HoneyComb LX2K) has:

# cat /sys/bus/soc/devices/soc0/revision
1.0

And I will be really grumpy if this system stops working. It's what I
use to do all my maintainer work, even if that's been fairly dormant
this year.

It's overall setting off red flags to update an in-place devicetree to
a "new revision" of silicon instead of adding a new DT for said
revision. 2160A has been on the market for several years, so it just
seems odd to all of the sudden retroactively make things
non-backwards-compatible.

-Olof

-Olof