[PATCH v3 2/3] riscv: dts: spacemit: add 24c02 eeprom on BPI-F3

From: Aurelien Jarno <aurelien@aurel32.net>
To: linux-kernel@vger.kernel.org, Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>, Yixun Lan <dlan@gentoo.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>,
	"open list:RISC-V ARCHITECTURE" <linux-riscv@lists.infradead.org>,
	"open list:RISC-V SPACEMIT SoC Support"
	<spacemit@lists.linux.dev>
Subject: [PATCH v3 2/3] riscv: dts: spacemit: add 24c02 eeprom on BPI-F3
Date: Fri, 26 Sep 2025 19:54:38 +0200	[thread overview]
Message-ID: <20250926175833.3048516-3-aurelien@aurel32.net> (raw)
In-Reply-To: <20250926175833.3048516-1-aurelien@aurel32.net>

The BPI-F3 board includes a 24c02 eeprom, that stores the MAC addresses
of the two network interfaces and the board's serial number. These
values are also exposed via an onie,tlv-layout nvmem layout.

The eeprom is marked as read-only since its contents are not supposed to
be modified.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
v2: no change 

 .../boot/dts/spacemit/k1-bananapi-f3.dts      | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 3b6e4f52e9aad..de10b1cb00aee 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -115,6 +115,29 @@ &i2c2 {
 	pinctrl-0 = <&i2c2_0_cfg>;
 	pinctrl-names = "default";
 	status = "okay";
+
+	eeprom@50 {
+		compatible = "atmel,24c02";
+		reg = <0x50>;
+		vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
+		pagesize = <16>;
+		read-only;
+		size = <256>;
+
+		nvmem-layout {
+			compatible = "onie,tlv-layout";
+
+			mac-address {
+				#nvmem-cell-cells = <1>;
+			};
+
+			num-macs {
+			};
+
+			serial-number {
+			};
+		};
+	};
 };
 
 &i2c8 {
@@ -143,7 +166,7 @@ buck2 {
 				regulator-always-on;
 			};
 
-			buck3 {
+			buck3_1v8: buck3 {
 				regulator-min-microvolt = <500000>;
 				regulator-max-microvolt = <1800000>;
 				regulator-ramp-delay = <5000>;
-- 
2.47.2


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