linux-kernel - [PATCH 2/4] arm64: dts: imx95-evk: add USB3 PHY tuning properties

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Message-Id: <20250604200301.1192096-2-Frank.Li@nxp.com>
Date: Wed,  4 Jun 2025 16:02:59 -0400
From: Frank Li <Frank.Li@....com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	imx@...ts.linux.dev (open list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH 2/4] arm64: dts: imx95-evk: add USB3 PHY tuning properties

From: Xu Yang <xu.yang_2@....com>

Add USB3 PHY tuning properties for imx95-15x15-evk and imx95-19x19-evk
boards according to signal measurement results.

Signed-off-by: Xu Yang <xu.yang_2@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
 arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts | 3 +++
 arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
index 6c47f4b47356a..e54f3b982127a 100644
--- a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts
@@ -1070,7 +1070,10 @@ usb3_data_hs: endpoint {
 
 &usb3_phy {
 	orientation-switch;
+	fsl,phy-pcs-tx-deemph-3p5db-attenuation-db = <17>;
+	fsl,phy-pcs-tx-swing-full-percent = <100>;
 	fsl,phy-tx-preemp-amp-tune-microamp = <600>;
+	fsl,phy-tx-vboost-level-microvolt = <1156>;
 	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 45015325fd47e..cf693c86fd454 100644
--- a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
@@ -623,7 +623,10 @@ usb3_data_hs: endpoint {
 };
 
 &usb3_phy {
+	fsl,phy-pcs-tx-deemph-3p5db-attenuation-db = <17>;
+	fsl,phy-pcs-tx-swing-full-percent = <100>;
 	fsl,phy-tx-preemp-amp-tune-microamp = <600>;
+	fsl,phy-tx-vboost-level-microvolt = <1156>;
 	orientation-switch;
 	status = "okay";
 
-- 
2.34.1