> You are really supposed to use the kernel API for these things, and not
> touch the registers directly.

You are right and I will definitely change the pin configuration code.
It was just a very first quick prototype and I was unfamiliar with
corresponding kernel API.

Is it also "safe" to use kernel GPIO API to toggle GPIO from RT
context such as timer handler? With safe I mean if it can influence
real-time performance in some negative way?

Thank you,
Andrey.

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