From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Fri, 15 Jan 2021 23:36:39 +0000 (+0000)
Subject: arm64: dts: lx2160a-cex7: increase at8035 PHY gigabit Tw parameter
X-Git-Tag: howlett/maple/20220722_2~3818^2~8^2~20
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=22171213e503edce38f249cff82b9ad3775b9026;p=users%2Fjedix%2Flinux-maple.git

arm64: dts: lx2160a-cex7: increase at8035 PHY gigabit Tw parameter

Increase the SmartEEE Tw parameter for Atheros PHYs to stop gigabit
links from sporadically dropping. Testing on this platform shows that
a value of 24 results in a stable link, whereas 23 or below has the
occasional drop.

Tested with a Netgear GS116 unmanaged switch link partner with Cat 5e
cabling.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---

diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a-cex7.dtsi b/arch/arm64/boot/dts/freescale/fsl-lx2160a-cex7.dtsi
index 49fcf025494f..459dccad8326 100644
--- a/arch/arm64/boot/dts/freescale/fsl-lx2160a-cex7.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a-cex7.dtsi
@@ -40,6 +40,7 @@
 
 	rgmii_phy1: ethernet-phy@1 {
 		reg = <1>;
+		qca,smarteee-tw-us-1g = <24>;
 	};
 };