Re: [PATCH v2] riscv: sophgo: dts: Add spi controller for SG2042

[Chen Wang]

On 2025/3/1 2:22, Conor Dooley wrote:
[......]
> > +
> > +		spi0: spi@7040004000 {
> > +			compatible = "snps,dw-apb-ssi";
> I thought were were dropping the use of "snps,dw-abp-ssi" in isolation,
> and starting to require soc-specific compatibles now.
>
> Rob, Krzysztof?
I'm also very interested to know why we can't just use 
"snps,dw-abp-ssi", maybe I missed some discussion ...
I googled examples of soc-specific defined in the code, and it doesn't 
seem to be much, only arch/mips/boot/dts/mscc/ocelot.dtsi and 
arch/riscv/boot/dts/thead/th1520.dtsi.
Specially, I looked at the commits for th1520 and saw this 
https://lore.kernel.org/linux-riscv/20240703-garbage-explicit-bd95f8deb716@wendy/. 
It tells if the fallback works identically, then the specific compatible 
is not needed.

This makes me more confused :)

Regards,

Chen