Re: [PATCH net-next v11 1/7] dt-bindings: phy: document the serdes PHY on sa8255p

[Geert Uytterhoeven]

Hi Bartosz,

Thanks for your patch!

On Mon, 29 Jun 2026 at 13:29, Bartosz Golaszewski
<bartosz.golaszewski@xxxxxxxxxxxxxxxx> wrote:
> Describe the SGMII/SerDes PHY present on the Qualcomm sa8255p platforms.
> This is essentially the same hardware as sa8775p rev3 but the PHY is
> managed by firmware over SCMI.

So why can't it be reuse the DT bindings, and be compatible with
qcom,sa8775p-dwmac-sgmii-phy?

> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/qcom,sa8255p-dwmac-sgmii-phy.yaml

> +  power-domains:
> +    maxItems: 1
> +
> +  power-domain-names:
> +    items:
> +      - const: serdes

> +examples:
> +  - |
> +    phy@8901000 {
> +        compatible = "qcom,sa8255p-dwmac-sgmii-phy";
> +        reg = <0x08901000 0xe10>;
> +        #phy-cells = <0>;
> +        power-domains = <&scmi7_dvfs 0>;
> +        power-domain-names = "serdes";

Ah, this uses power-domains, while the existing bindings for
qcom,sa8775p-dwmac-sgmii-phy use a clock.
I guess the clock is the correct hardware description?

Adding to my list of examples for backing a hardware-to-SCMI remapping
driver...

> +    };

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds