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Message-ID: <2ec0f33d9a83f317f7fe3f4682c1afdc6e27266b.1758063737.git.daniel@makrotopia.org>
Date: Wed, 17 Sep 2025 00:05:36 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: [PATCH 3/4] arm64: dts: mediatek: mt7981b: add 'serial' cell to efuse
The efuse of the MediaTek MT7981 contains a 16-byte unique identifier.
Add a 'serial' cell covering those 16 bytes to the nvmem defininition of
the efuse to allow easy access from userspace, eg. to generate a
persistent random MAC address on boards which don't have any
factory-assigned addresses.
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
arch/arm64/boot/dts/mediatek/mt7981b.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
index 277c11247c13..bffbe9a1d836 100644
--- a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
@@ -237,6 +237,10 @@ efuse@...20000 {
#address-cells = <1>;
#size-cells = <1>;
+ serial@140 {
+ reg = <0x140 0x10>;
+ };
+
thermal_calibration: thermal-calib@274 {
reg = <0x274 0xc>;
};
--
2.51.0
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