[PATCH 5.15 045/247] ARM: dts: aspeed: ast2600-evb: Enable RX delay for MAC0/MAC1

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Howard Chiu <howard_chiu@xxxxxxxxxxxxxx>

[ Upstream commit 4d338ee40ba89e508c5d3e1b4af956af7cb5e12e ]

Since mac0/1 and mac2/3 are physically located on different die,
they have different properties by nature, which is mac0/1 has smaller delay step.

The property 'phy-mode' on ast2600 mac0 and mac1 is recommended to set to 'rgmii-rxid'
which enables the RX interface delay from the PHY chip.
Refer page 45 of SDK User Guide v08.00
https://github.com/AspeedTech-BMC/openbmc/releases/download/v08.00/SDK_User_Guide_v08.00.pdf

Fixes: 2ca5646b5c2f ("ARM: dts: aspeed: Add AST2600 and EVB")
Signed-off-by: Howard Chiu <howard_chiu@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/SG2PR06MB23152A548AAE81140B57DD69E6E09@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Joel Stanley <joel@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/arm/boot/dts/aspeed-ast2600-evb.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb.dts b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
index b7eb552640cb..788448cdd6b3 100644
--- a/arch/arm/boot/dts/aspeed-ast2600-evb.dts
+++ b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
@@ -103,7 +103,7 @@
 &mac0 {
 	status = "okay";
 
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-rxid";
 	phy-handle = <&ethphy0>;
 
 	pinctrl-names = "default";
@@ -114,7 +114,7 @@
 &mac1 {
 	status = "okay";
 
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-rxid";
 	phy-handle = <&ethphy1>;
 
 	pinctrl-names = "default";
-- 
2.35.1