[PATCH 2/4] ARM: dts: imx: bx50v3: Configure phy-mode

Andrew Lunn andrew at lunn.ch
Tue Feb 17 06:58:42 PST 2026


On Tue, Feb 17, 2026 at 02:59:49PM +0200, Ian Ray wrote:
> Set `phy-mode' on network switch CPU ports to eliminate a warning.
> 
> Signed-off-by: Ian Ray <ian.ray at gehealthcare.com>
> ---
>  arch/arm/boot/dts/nxp/imx/imx6q-b450v3.dts | 1 +
>  arch/arm/boot/dts/nxp/imx/imx6q-b650v3.dts | 1 +
>  arch/arm/boot/dts/nxp/imx/imx6q-b850v3.dts | 1 +
>  3 files changed, 3 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/nxp/imx/imx6q-b450v3.dts b/arch/arm/boot/dts/nxp/imx/imx6q-b450v3.dts
> index d994b32ad825..7326b8ad08cb 100644
> --- a/arch/arm/boot/dts/nxp/imx/imx6q-b450v3.dts
> +++ b/arch/arm/boot/dts/nxp/imx/imx6q-b450v3.dts
> @@ -140,6 +140,7 @@ port at 3 {
>  	port at 4 {
>  		reg = <4>;
>  		label = "cpu";
> +		phy-mode = "gmii";

Are the PHYs external to the switch?

>  	port at 4 {
>  		reg = <4>;
>  		label = "cpu";
> +		phy-mode = "gmii";
>  		ethernet = <&switch_nic>;
>  		phy-handle = <&switchphy4>;

You have back to back PHYs on the CPU port? This is not wrong, but
unusual.

	Andrew



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