linux-kernel - [PATCH 6/6] ARM: dts: microchip: sama7d65

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Message-ID: <96ee6832d9b55acfae8d3560f625798025dfd89c.1743523114.git.Ryan.Wanner@microchip.com>
Date: Tue, 1 Apr 2025 09:13:22 -0700
From: <Ryan.Wanner@...rochip.com>
To: <andrew+netdev@...n.ch>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <onor+dt@...nel.org>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>
CC: <nicolas.ferre@...rochip.com>, <netdev@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, Ryan Wanner
	<Ryan.Wanner@...rochip.com>
Subject: [PATCH 6/6] ARM: dts: microchip: sama7d65_curiosity: add EEPROM

From: Ryan Wanner <Ryan.Wanner@...rochip.com>

If the MAC address is not fetched and loaded by U-boot then Linux will
have to load the address. The EEPROM and nvmem-layout to describe
EUI48 MAC address regions.

Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
---
 .../dts/microchip/at91-sama7d65_curiosity.dts | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
index 81abc387112d..779412f04a11 100644
--- a/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
@@ -234,6 +234,24 @@ regulator-state-mem {
 			};
 		};
 	};
+
+	eeprom0: eeprom@51 {
+		compatible = "microchip,24aa025e48";
+		reg = <0x51>;
+		size = <256>;
+		pagesize = <16>;
+		vcc-supply = <&vdd_3v3>;
+
+		nvmem-layout {
+			compatible = "fixed-layout";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			eeprom0_eui48: eui48@fa {
+				reg = <0xfa 0x6>;
+			};
+		};
+	};
 };
 
 &main_xtal {
@@ -251,6 +269,9 @@ &pinctrl_gmac0_txck_default
 	phy-mode = "rgmii-id";
 	status = "okay";
 
+	nvmem-cells = <&eeprom0_eui48>;
+	nvmem-cell-names = "mac-address";
+
 	ethernet-phy@7 {
 		reg = <0x7>;
 		interrupt-parent = <&pioa>;
-- 
2.43.0