The Caswell motherboard CAR-5070 offers customizable LED control, but the GPIO function library provided by older systems cannot be loaded on this motherboard. A new driver is required to control the LEDs.
Update

1. load gpio_nuvoton in the build environment and compile gpio-nuvoton.ko

2. In array_OS.patch add EXPORT_SYMBOL(nct6796d_set_gp_io_sel) and copy Module.symvers to kern/monitor path for avx.ko compiling.

3. Startup monitor script start_avxmonitor.sh, execute the insmod gpio-nuvoton.ko module loading.

4. Adding CAPB_5070NR_led_init(), CAPB_5070NR_led_uninit() and CAPB_5070NR_led_set()

Check the gpio-nuvoton.ko and avx.ko modules
Reading the /proc/avx/led file will execute a test LED mode