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Message-ID: <689dad6ea05479b520100bd6ec92dfa7a541ec4d.1758063737.git.daniel@makrotopia.org>
Date: Wed, 17 Sep 2025 00:05:25 +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 2/4] arm64: dts: mediatek: mt7986a: add 'serial' cell to efuse
The efuse of the MediaTek MT7986 contains an 8-byte unique identifier.
Add a 'serial' cell covering those 8 bytes to the nvmem defininition of
the efuse to allow easy access from userspace, eg. to generate a
persistent random MAC address on boards like the BananaPi R3 which
doesn't have any factory-assigned addresses.
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
arch/arm64/boot/dts/mediatek/mt7986a.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
index a8972330a7b8..0823eb586ec6 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
@@ -450,6 +450,10 @@ efuse: efuse@...00000 {
#address-cells = <1>;
#size-cells = <1>;
+ serial@140 {
+ reg = <0x140 0x8>;
+ };
+
thermal_calibration: calib@274 {
reg = <0x274 0xc>;
};
--
2.51.0
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