[PATCH 2/4] arm64: dts: mediatek: mt7986a: add 'serial' cell to efuse

[Daniel Golle]

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 at makrotopia.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 at 11d00000 {
 			#address-cells = <1>;
 			#size-cells = <1>;
 
+			serial at 140 {
+				reg = <0x140 0x8>;
+			};
+
 			thermal_calibration: calib at 274 {
 				reg = <0x274 0xc>;
 			};
-- 
2.51.0