linux-kernel - [PATCH v2 4/4] arm64: allwinner: a64: disable the RTL8211E internal RX delay on Pine64+

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Date:   Tue, 22 Aug 2017 12:04:00 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-sunxi@...glegroups.com, Icenowy Zheng <icenowy@...c.io>
Subject: [PATCH v2 4/4] arm64: allwinner: a64: disable the RTL8211E internal RX delay on Pine64+

Some Pine64+ boards have a broken RTL8211E PHY, which cannot work
reliably in 1000Base-T mode with default configuration.

A solution is passed to Pine64, which is said to be disabling the
internal RX delay of the PHY.

Enable the hack by set the PHY mode to RGMII-TXID.

Signed-off-by: Icenowy Zheng <icenowy@...c.io>
---
Changes in v2:
- It can be merged now as dwmac-sun8i entered mainline.
- Use phy-mode rgmii-txid instead of custom property.

 arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts
index 24f1aac366d6..ed715426fffc 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts
@@ -52,7 +52,7 @@
 &emac {
 	pinctrl-names = "default";
 	pinctrl-0 = <&rgmii_pins>;
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-txid";
 	phy-handle = <&ext_rgmii_phy>;
 	status = "okay";
 };
-- 
2.13.5