What is the J2 kernel

[nephros]

nemo@PGJollaC2:~ $ uname   -a
Linux PGJollaC2 5.4.233 #15 SMP PREEMPT Thu Jan 23 12:08:09 UTC 2025 aarch64 GNU/Linux

See also:

Mainline Linux kernel for the Jolla C2

Since I got my Jolla C2, I’ve been trying to get a (close-to-)mainline Linux kernel running on it. Now that at least some things are working, I’ve decided to create this thread to report the mainlining progress. The following things are working right now: Display Touchscreen GPU USB in peripheral mode (no host mode yet) Battery charging and fuel gauge Power off (but no reboot for some reason) The changes are available at Files · ums9230 · linux-mainlining / Linux · GitLab. To boot this kern…