kernel: set wifi mac from soc serial number

[robin-reckmann]

This copies the behavior of the downstream qcacld-3.0 wifi driver.
Using 00:0a:f5 OUI and lowest 3 bytes from soc serial number.

Tests:

• MAC address of wlan0 is correctly set.
• MAC address stays the same after reboot
• MAC address is the same as in agnos

[github-actions]

vamOS System Profile

Changes vs master

Metric	Change
Used space	3485.6MB → 3485.6MB (+0MB)
Sparse image	3440.0MB → 3440.0MB (+0MB)
Package count	524 → 524

Directory size changes (>1MB)

Directory	Change

---

Metric	Value
Used space	3485.6MB / 5959.5MB
Files	56330
Directories	4762
Symlinks	3602
Packages	524

Top 10 Directories

Directory	Size

Category Breakdown

Category	Size	%
xbps packages	2489.0MB	71.4%
Python venv	655.3MB	18.8%
Firmware	11.5MB	.3%
Other	329.7MB	9.4%

Top 10 Packages by Size

Package	Size
mit-krb5-libs-1.21.3_1	270.4MB
gawk-5.3.2_1	210.3MB
llvm-21_3	148.6MB
libldns-1.9.0_1	124.3MB
pd-mapper-1.0_1	73.9MB
libclang21-21.1.7_1	70.2MB
glib-2.86.1_2	67.1MB
gcc-14.2.1+20250405_4	65.4MB
libcap-progs-2.77_1	56MB
cmake-4.2.2_1	53.2MB

Top 30 Files by Size

File	Size
/usr/lib/llvm/21/lib/libLLVM.so.21.1	124.3MB
/usr/lib/llvm/21/lib/libMLIR.so.21.1	89.7MB
/usr/lib/llvm/21/bin/mlir-transform-opt	82.9MB
/usr/lib/llvm/21/lib/libclang-cpp.so.21.1	56MB
/usr/lib/llvm/21/bin/mlir-translate	53.2MB
/usr/lib/llvm/21/bin/llvm-exegesis	52MB
/usr/lib/llvm/21/bin/llvm-bolt-binary-analysis	50.6MB
/usr/local/venv/lib/python3.12/site-packages/ffmpeg/install/lib/libavcodec.a	50.5MB
/usr/bin/uv	48.1MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/gnat1	40.1MB
/usr/bin/gdb	38.1MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1plus	37.3MB
/usr/lib/libgallium-25.3.3.so	35.4MB
/usr/lib/libllvm-qcom.so	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/cc1	35.2MB
/usr/lib/gcc/aarch64-linux-gnu/14.2/lto1	33.9MB
/usr/bin/lto-dump	33.9MB
/usr/lib/libRusticlOpenCL.so.1.0.0	32.5MB
/usr/local/venv/bin/ruff	31.8MB
/usr/share/icu/78.2/icudt78l.dat	31.5MB
/usr/lib/llvm/21/lib/libclang.so.21.1.7	30.2MB
/usr/lib/llvm/21/bin/c-index-test	28.6MB
/usr/local/venv/lib/python3.12/site-packages/gcc_arm_none_eabi/toolchain/libexec/gcc/arm-none-eabi/13.2.1/cc1	28.2MB
/usr/lib/libz3.so	27.9MB
/usr/bin/run	26.6MB
/usr/local/venv/lib/python3.12/site-packages/numpy.libs/libscipy_openblas64_-71e1b124.so	23.6MB
/usr/comma/updater	23.5MB
/usr/comma/setup	23.5MB
/usr/comma/reset	23.5MB
/usr/local/uv/python/cpython-3.12.13-linux-aarch64-gnu/bin/python3.12	22.1MB

[greatgitsby]

jc: does this improve wifi behavior or performance?

[robin-reckmann]

No performance improvements. But in general Wifi device should have a fixed MAC address (or some rotation if you care about privacy and tracking), not randomly assigned at each boot. With this you also keep the same ip address when reconnecting to an access point.

[adeebshihadeh]

Want to try to upstream this to mainilne Linux?