[PATCH 1/4] arm64: dts: mediatek: mt7622: add 'serial' cell to efuse

[Daniel Golle]

The efuse of the MediaTek MT7622 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 R64 which
doesn't have any factory-assigned addresses.

Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 arch/arm64/boot/dts/mediatek/mt7622.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
index 917fa39a74f8..0b9803a183b9 100644
--- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
@@ -278,6 +278,10 @@ efuse: efuse at 10206000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
 
+		serial at 140 {
+			reg = <0x140 0x8>;
+		};
+
 		thermal_calibration: calib at 198 {
 			reg = <0x198 0xc>;
 		};
-- 
2.51.0