Re: [PATCH 1/2] ARM: dts: mba6ulx: Add Ethernet PHY interrupt support

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] Leftover `gpio-hog` nodes (`enet1_int-hog` and `enet2_int-hog`) for Ethernet PHY interrupt pins double-book GPIO resources.
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--- Patch [1]: [PATCH 1/2] ARM: dts: mba6ulx: Add Ethernet PHY interrupt support ---
commit b452753cee9dad50d404387319c21ed7231c45d2
Author: Alexander Stein <alexander.stein@ew.tq-group.com>

ARM: dts: mba6ulx: Add Ethernet PHY interrupt support

This commit adds interrupt-parent and interrupts properties to the ethphy0
and ethphy1 nodes in the device tree. It configures the Ethernet PHYs to
use level-low interrupts provided by the GPIO expander.

> diff --git a/arch/arm/boot/dts/nxp/imx/mba6ulx.dtsi b/arch/arm/boot/dts/nxp/imx/mba6ulx.dtsi
> --- a/arch/arm/boot/dts/nxp/imx/mba6ulx.dtsi
> +++ b/arch/arm/boot/dts/nxp/imx/mba6ulx.dtsi
> @@ -214,6 +214,8 @@ ethphy0: ethernet-phy@0 {
>  			clocks = <&clks IMX6UL_CLK_ENET_REF>;
>  			reg = <0>;
>  			max-speed = <100>;
> +			interrupt-parent = <&expander_in0>;
> +			interrupts = <6 IRQ_TYPE_LEVEL_LOW>;

[Severity: Medium]
Will this conflict with the existing enet1_int-hog in the expander_in0 node?

Further down in this file, expander_in0 still defines these pins as
gpio-hogs:

		enet1_int-hog {
			gpio-hog;
			gpios = <6 0>;
			input;
		};

		enet2_int-hog {
			gpio-hog;
			gpios = <7 0>;
			input;
		};

Does leaving these redundant gpio-hog nodes in place cause the device tree
to claim the same hardware resource twice? This might result in a resource
ownership conflict between the GPIO and IRQ subsystems, potentially causing
the IRQ request to fail and fall back to polling.

>  		};
>  
>  		ethphy1: ethernet-phy@1 {
>  			compatible = "ethernet-phy-ieee802.3-c22";
>  			clocks = <&clks IMX6UL_CLK_ENET2_REF_125M>;
>  			reg = <1>;
>  			max-speed = <100>;
> +			interrupt-parent = <&expander_in0>;
> +			interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
>  		};
>  	};
>  };

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260813121250.3993187-1-alexander.stein@ew.tq-group.com?part=1