Re: [PATCH v2 resend] net: stmmac: add support for dwmac 5.20

[Jisheng Zhang <jszhang@kernel.org>]

On Wed, Nov 19, 2025 at 04:13:17PM +0000, Russell King (Oracle) wrote:
> On Wed, Nov 19, 2025 at 11:35:26PM +0800, Jisheng Zhang wrote:
> > The dwmac 5.20 IP can be found on some synaptics SoCs. 
> > 
> > The binding doc has been already upstreamed by
> > commit 13f9351180aa ("dt-bindings: net: snps,dwmac: Add dwmac-5.20
> > version")
> > 
> > So we just need to add a compatibility flag in dwmac generic driver.
> 
> Do we _need_ to add it to the generic driver? Do the platforms that are
> using this really not need any additional code to support them?
> 
> Looking at all the DT that mention dwmac-5.20 in their compatible
> strings, that is always after other compatibles that point to other
> platform specific drivers.
> 
> So, can you point to a platform that doesn't have its own platform
> glue, and would be functional when using the dwmac-generic driver?

Synatpics platforms use the dwmac-generic driver, it's enough now.
But we haven't upstreamed related platforms, but will do soon.
> 
> For reference, the dts that refer to dwmac-5.20 are:
> 
> arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> arch/arm64/boot/dts/renesas/r9a09g056.dtsi
> arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> arch/arm64/boot/dts/st/stm32mp251.dtsi
> arch/arm64/boot/dts/st/stm32mp253.dtsi
> arch/arm64/boot/dts/st/stm32mp233.dtsi
> arch/arm64/boot/dts/st/stm32mp231.dtsi
> arch/riscv/boot/dts/starfive/jh7110.dtsi
> 
> Thanks.
> 
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