Re: [PATCH net-next v11 1/7] dt-bindings: phy: document the serdes PHY on sa8255p
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: 2026-06-29 13:59:24
Also in:
imx, linux-amlogic, linux-arm-kernel, linux-arm-msm, linux-devicetree, linux-mips, linux-renesas-soc, linux-riscv, linux-rockchip, linux-sunxi, lkml
Hi Bartosz, Thanks for your patch! On Mon, 29 Jun 2026 at 13:29, Bartosz Golaszewski [off-list ref] 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 <redacted>
quoted hunk ↗ jump to hunk
--- /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@linux-m68k.org
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