Subject: Re: [PATCH v6 05/10] dt-bindings: arm: fsl: Add solidrun lx2160a twins board

From: Josua Mayer <[email-masked]>
Date: Thu, 14 May 2026 10:12:19 +0000

Hi Krzysztof,

Am 14.05.26 um 08:43 schrieb Krzysztof Kozlowski:
> On Tue, May 12, 2026 at 04:39:00PM +0200, Josua Mayer wrote:
>> The SolidRun LX2160A Twins board supports two configurations, one with
>> with a sinle CEX-7 module, and one with two (dual).
>>
>> The dual configuration was not yet tested.
> And how do see dual configuration? New compatible? For the same
> hardware (the same because from SoC point of view it will be exactly
> the same)?

From SoC point of view the sides are different, and the hardware looks different
when it is assembled for dual configuration. Most notably each cpu in dual
version only sees 12 SFP connectors each, while the single sees 20.

Further the port numbering might be different between left and right side cpu.

Finally there are some complications in the current pcb version with resource
distribution (i.e. fans, leds).

>
> You must post complete binding, otherwise this feels risky and when you
> actually try running dual configuration you will see that existing
> binding makes no sense.

I thought about this and decided against it.

The single version is simple to describe, the cpu always sits in the right side socket,
sees 20 SFP connectors and has full control over every peripheral.

The dual version will require different description even if only one cpu is installed.

Currently dual is hardware only without any software, and changes may or may not
be made to the PCB to simplify things. Therefore I avoided drafting any bindings.

sincerely
Josua Mayer