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From: Huacai Chen <chenhuacai@loongson.cn>
To: Huacai Chen <chenhuacai@kernel.org>
Cc: loongarch@lists.linux.dev,
	Xuefeng Li <lixuefeng@loongson.cn>,
	Guo Ren <guoren@kernel.org>,
	Xuerui Wang <kernel@xen0n.name>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	linux-kernel@vger.kernel.org,
	loongson-kernel@lists.loongnix.cn,
	Huacai Chen <chenhuacai@loongson.cn>
Subject: [PATCH] LoongArch: Fix GMAC's phy-mode definitions in dts
Date: Wed, 29 May 2024 18:00:25 +0800
Message-ID: <20240529100025.2865868-1-chenhuacai@loongson.cn>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

The GMAC of Loongson chips cannot insert the correct 1.5-2ns delay. So
we need the PHY to insert internal delays for both transmit and receive
data lines from/to the PHY device. Fix this by changing the "phy-mode"
from "rgmii" to "rgmii-id" in dts.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
 arch/loongarch/boot/dts/loongson-2k0500-ref.dts | 4 ++--
 arch/loongarch/boot/dts/loongson-2k1000-ref.dts | 4 ++--
 arch/loongarch/boot/dts/loongson-2k2000-ref.dts | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/loongarch/boot/dts/loongson-2k0500-ref.dts b/arch/loongarch/boot/dts/loongson-2k0500-ref.dts
index 8aefb0c12672..a34734a6c3ce 100644
--- a/arch/loongarch/boot/dts/loongson-2k0500-ref.dts
+++ b/arch/loongarch/boot/dts/loongson-2k0500-ref.dts
@@ -44,14 +44,14 @@ linux,cma {
 &gmac0 {
 	status = "okay";
 
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-id";
 	bus_id = <0x0>;
 };
 
 &gmac1 {
 	status = "okay";
 
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-id";
 	bus_id = <0x1>;
 };
 
diff --git a/arch/loongarch/boot/dts/loongson-2k1000-ref.dts b/arch/loongarch/boot/dts/loongson-2k1000-ref.dts
index 8463fe035386..23cf26cc3e5f 100644
--- a/arch/loongarch/boot/dts/loongson-2k1000-ref.dts
+++ b/arch/loongarch/boot/dts/loongson-2k1000-ref.dts
@@ -43,7 +43,7 @@ linux,cma {
 &gmac0 {
 	status = "okay";
 
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-id";
 	phy-handle = <&phy0>;
 	mdio {
 		compatible = "snps,dwmac-mdio";
@@ -58,7 +58,7 @@ phy0: ethernet-phy@0 {
 &gmac1 {
 	status = "okay";
 
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-id";
 	phy-handle = <&phy1>;
 	mdio {
 		compatible = "snps,dwmac-mdio";
diff --git a/arch/loongarch/boot/dts/loongson-2k2000-ref.dts b/arch/loongarch/boot/dts/loongson-2k2000-ref.dts
index 74b99bd234cc..ea9e6985d0e9 100644
--- a/arch/loongarch/boot/dts/loongson-2k2000-ref.dts
+++ b/arch/loongarch/boot/dts/loongson-2k2000-ref.dts
@@ -92,7 +92,7 @@ phy1: ethernet-phy@1 {
 &gmac2 {
 	status = "okay";
 
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-id";
 	phy-handle = <&phy2>;
 	mdio {
 		compatible = "snps,dwmac-mdio";
-- 
2.43.0