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rellwood

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  1. Hi, I installed Armbian Bookworm Minimal CLI on my Rock 5b and followed the instructions on this post to get the fan to work properly. Specifically, git clone https://github.com/lukaszsobala/fan-control-rock5b cd fan-control-rock5b make package sudo dpkg -i fan-control*.deb sudo systemctl enable fan-control systemctl start fan-control However, the software won't start. When trying to run it manually, I get, $ sudo /usr/sbin/fan-control pwmchip: 0 gpio: 0 pwm-period: 20000 temp-map: speed: 0, temp: 20, duty: 8400, duration: 10 speed: 1, temp: 50, duty: 9600, duration: 2 speed: 2, temp: 60, duty: 10800, duration: 2 speed: 3, temp: 70, duty: 16000, duration: 5 Failed to export GPIO, No such file or directory Failed to export GPIO, No such file or directory Failed to export GPIO, No such file or directory Failed to export GPIO, No such file or directory Failed to export GPIO, No such file or directory Failed to export GPIO, No such file or directory Failed to init GPIO Looking at the source, I think it is trying to access the file /sys/devices/platform/fd8b0010.pwm/pwm/pwmchip0/pwm0/export (among others.) That directory exists only so far as /sys/devices/platform/fd8b0010.pwm/pwm/pwmchip0 and doesn't contain pwm0, let alone pwm0/export. Listing that directory, I have $ ls -al total 0 drwxr-xr-x 3 root root 0 Jul 10 15:21 . drwxr-xr-x 3 root root 0 Jul 10 15:21 .. lrwxrwxrwx 1 root root 0 Jul 10 16:48 device -> ../../../fd8b0010.pwm --w------- 1 root root 4096 Jul 10 15:21 export -r--r--r-- 1 root root 4096 Jul 10 16:48 npwm drwxr-xr-x 2 root root 0 Jul 10 16:48 power lrwxrwxrwx 1 root root 0 Jul 10 15:21 subsystem -> ../../../../../class/pwm -rw-r--r-- 1 root root 4096 Jul 10 15:21 uevent --w------- 1 root root 4096 Jul 10 15:21 unexport I believe this Armbian image doesn't include any firmware, right? So, could I be missing required firmware? Or, could the needed file be elsewhere? Thanks for any help, Richard
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