Ilfirin
Posts: 15
Joined: Fri Jul 13, 2012 11:15 am

Flowing SPI frequency with core_freq

Wed Aug 21, 2019 3:06 pm

I have noticed, and according to failed to drive ws2812b LEDs, that SPI frequency is computed from core_freq and driver is not correcting this on the run. So where you need stable SPI frequency, you have to be sure you have dynamic frequency disabled or have core_freq constant, which is not possible, at the moment, on raspberry pi 4 (parameters in config.txt are ignored).

Beware, it is pretty serious bug :evil:

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