[PATCH] arm64: dts: imx95: add fsl,phy-tx-vref-tune-percent tuning properties for USB3 PHY

[Frank Li]

On Thu, Aug 21, 2025 at 07:08:28PM +0800, Xu Yang wrote:
> Add it to improve USB signal quality.
>
> Signed-off-by: Xu Yang <xu.yang_2 at nxp.com>

Reviewed-by: Frank Li <Frank.Li at nxp.com>

> ---
>  arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts | 1 +
>  arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts | 1 +
>  2 files changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
> index 46f6e0fbf2b0..f0aff01cefbf 100644
> --- a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
> @@ -1082,6 +1082,7 @@ &usb3_phy {
>  	fsl,phy-pcs-tx-swing-full-percent = <100>;
>  	fsl,phy-tx-preemp-amp-tune-microamp = <600>;
>  	fsl,phy-tx-vboost-level-microvolt = <1156>;
> +	fsl,phy-tx-vref-tune-percent = <100>;
>  	status = "okay";
>
>  	port {
> diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
> index 2f949a0d48d2..064bc508eb1b 100644
> --- a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
> @@ -622,6 +622,7 @@ &usb3_phy {
>  	fsl,phy-pcs-tx-swing-full-percent = <100>;
>  	fsl,phy-tx-preemp-amp-tune-microamp = <600>;
>  	fsl,phy-tx-vboost-level-microvolt = <1156>;
> +	fsl,phy-tx-vref-tune-percent = <100>;
>  	orientation-switch;
>  	status = "okay";
>
> --
> 2.34.1
>