I recently uploaded Armbian_20.11_Odroidc4_focal_current 5.9.12_desktop.img.xz onto a new Odroid-C4. Booting up and getting started hasn't been a problem, but I've been interested in driving some brushless motors using a PWM control signal and started looking through the device tree. The C4 is supposed to have a total of 6 PWM outputs, spread over 3 pwmchip devices, which (I believe) should be named pwmchip0, pwmchip4, and pwmchip8. However, upon navigating to /sys/class/pwm, I'm only seeing pwmchip0. This seems a little odd, because if PWM was entirely disabled in the device tree, I wouldn't have expected that any of the chips would have appeared. Not sure if this is a board-level problem, or something I'm missing in the kernel image I downloaded. I'm planning on comparing the stock Odroid image, but the spare uSD card I ordered is taking longer to arrive than expected. I can update when it comes in, but wanted to check either way if this was expected behavior for the Armbian image and if so, there is a simple fix, since I'd prefer sticking with vanilla Armbian over whatever fork the manufacturer puts out is.
Thanks for your time, and please let me know if there's any add'l information I can provide to make this easier!