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How to disable sleep mode using AXP209 PMU ?

J.M.
in Beginners

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Hi,

 

I'm trying to run with a PREEMPT_RT kernel to get a real-time (lowest latency as possible) performance. 

But in addition to the PREEMPT_RT patch, I want to make sure the system doesn't go to sleep (or using power save modes) to avoid additional wake-ups latencies (that the PREEMPT_RT patch cannot reduce).

I've reviewed the AXP209 datasheet and tried to understand if I can somehow disable the system from going to sleep, but I didn't find the answer for that. I do know that register 0x31 can control the entrance to sleep mode if we write '1' to bit-3, but I can't prevent other drivers or applications from doing it.

 

Question:

Is there a way to disable the option to control the sleep-mode ?

 

Thanks

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