linux-kernel - [PATCH AUTOSEL 4.20 29/60] ARM: dts: am335x-evm: Fix PHY mode for ethernet

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Message-Id: <20190313191021.158171-29-sashal@kernel.org>
Date:   Wed, 13 Mar 2019 15:09:50 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Peter Ujfalusi <peter.ujfalusi@...com>,
        Tony Lindgren <tony@...mide.com>,
        Sasha Levin <sashal@...nel.org>, linux-omap@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH AUTOSEL 4.20 29/60] ARM: dts: am335x-evm: Fix PHY mode for ethernet

From: Peter Ujfalusi <peter.ujfalusi@...com>

[ Upstream commit 37685f6a63eeca2135d1f704e7638409a071b1f6 ]

The PHY must add both tx and rx delay and not only on the tx clock.
The board uses AR8031_AL1A PHY where the rx delay is enabled by default,
the tx dealy is disabled.

The reason why rgmii-txid worked because the rx delay was not disabled by
the driver so essentially we ended up with rgmii-id PHY mode.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/am335x-evm.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index 98ec9c3e49ba..8399bc983416 100644
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -729,7 +729,7 @@
 
 &cpsw_emac0 {
 	phy-handle = <&ethphy0>;
-	phy-mode = "rgmii-txid";
+	phy-mode = "rgmii-id";
 };
 
 &tscadc {
-- 
2.19.1