linux-kernel - [PATCH] ARM: dts: aspeed: asrock: Use MAC address from FRU EEPROM

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Date: Wed, 31 Jan 2024 20:25:54 -0800
From: Zev Weiss <zev@...ilderbeest.net>
To: Joel Stanley <joel@....id.au>,
	Andrew Jeffery <andrew@...econstruct.com.au>,
	linux-arm-kernel@...ts.infradead.org,
	linux-aspeed@...ts.ozlabs.org
Cc: Zev Weiss <zev@...ilderbeest.net>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: dts: aspeed: asrock: Use MAC address from FRU EEPROM

Like the more recently added ASRock BMC platforms, e3c246d4i and
romed8hm3 also have the BMC's MAC address available in the baseboard
FRU EEPROM, so let's add support for using it.

Signed-off-by: Zev Weiss <zev@...ilderbeest.net>
---
 arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-e3c246d4i.dts | 9 +++++++++
 arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-romed8hm3.dts | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-e3c246d4i.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-e3c246d4i.dts
index c4b2efbfdf56..bb2e6ef609af 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-e3c246d4i.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-e3c246d4i.dts
@@ -83,6 +83,9 @@ &mac0 {
 
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_rgmii1_default &pinctrl_mdio1_default>;
+
+	nvmem-cells = <&eth0_macaddress>;
+	nvmem-cell-names = "mac-address";
 };
 
 &i2c1 {
@@ -103,6 +106,12 @@ eeprom@57 {
 		compatible = "st,24c128", "atmel,24c128";
 		reg = <0x57>;
 		pagesize = <16>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		eth0_macaddress: macaddress@...0 {
+			reg = <0x3f80 6>;
+		};
 	};
 };
 
diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-romed8hm3.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-romed8hm3.dts
index 4554abf0c7cd..f8a1764a4424 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-romed8hm3.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-romed8hm3.dts
@@ -71,6 +71,9 @@ &mac0 {
 
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_rgmii1_default &pinctrl_mdio1_default>;
+
+	nvmem-cells = <&eth0_macaddress>;
+	nvmem-cell-names = "mac-address";
 };
 
 &i2c0 {
@@ -131,6 +134,12 @@ eeprom@50 {
 		compatible = "st,24c128", "atmel,24c128";
 		reg = <0x50>;
 		pagesize = <16>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		eth0_macaddress: macaddress@...0 {
+			reg = <0x3f80 6>;
+		};
 	};
 };
 
-- 
2.43.0