Re: [PATCH 3/3] memory: renesas-rpc-if: Add support for RZ/T2H SoC

[Krzysztof Kozlowski]

On 16/03/2026 15:16, Wolfram Sang wrote:
> 
>> Add a new compatible string "renesas,r9a09g077-xspi" for RZ/T2H while
>> reusing the existing xspi_info_r9a09g047 OF data. This allows the driver
>> to bind correctly on RZ/T2H while the register differences can be handled
>> in future updates as the affected configuration registers are not currently
>> accessed by the driver.
> 
> This sounds fragile to me. Can you add a comment somewhere in the driver
> or headers so people wanting to use these registers will find out that
> the SoCs are not compatible anymore?

IMO, this patch is not needed. If you need to handle differences in
registers, then you add dedicated OF data.

The change here (with the bindings) is actually confusing, because
effectively it says two contradictory statements:
1. Driver patch: devices are different but they are compatible in
meaning of DT,
2. Bindings: devices are not compatible

So you need to decide which above, but not both.

Eventually provide extensive arguments in terms of how DT understands
compatibility.

Best regards,
Krzysztof