linux-kernel - [PATCH 3/7] arm64: dts: imx8mp-venice-gw702x: reduce RGMII CLK drive strength

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Message-Id: <20250916153216.1042625-4-tharvey@gateworks.com>
Date: Tue, 16 Sep 2025 08:32:12 -0700
From: Tim Harvey <tharvey@...eworks.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>
Cc: devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Tim Harvey <tharvey@...eworks.com>
Subject: [PATCH 3/7] arm64: dts: imx8mp-venice-gw702x: reduce RGMII CLK drive strength

The i.MX8M Plus EQOS RGMII tracelength is less than 1in and does not
require a x6 drive strength. Reduce the CLK drive strength to x1 for
better emissions.

Signed-off-by: Tim Harvey <tharvey@...eworks.com>
---
 arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi
index a1232a4f8485..dd9eeb3479fd 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw702x.dtsi
@@ -462,7 +462,7 @@ MX8MP_IOMUXC_ENET_TD1__ENET_QOS_RGMII_TD1		0x16
 			MX8MP_IOMUXC_ENET_TD2__ENET_QOS_RGMII_TD2		0x16
 			MX8MP_IOMUXC_ENET_TD3__ENET_QOS_RGMII_TD3		0x16
 			MX8MP_IOMUXC_ENET_TX_CTL__ENET_QOS_RGMII_TX_CTL		0x16
-			MX8MP_IOMUXC_ENET_TXC__CCM_ENET_QOS_CLOCK_GENERATE_TX_CLK	0x16
+			MX8MP_IOMUXC_ENET_TXC__CCM_ENET_QOS_CLOCK_GENERATE_TX_CLK	0x0
 		>;
 	};
 
-- 
2.25.1