Messages in this thread | | | From | Rasmus Villemoes <> | Subject | battery switch-over detection on pcf2127 | Date | Tue, 5 May 2020 21:54:47 +0200 |
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Hi Bruno
I just noticed your "rtc: pcf2127: add tamper detection support" (03623b4b04) from 5.4. Unfortunately, clearing the BTSE bit breaks a use case of ours:
We rely on the battery switch-over detection to distinguish a powerfail during boot from a PORESET by the external watchdog (in the latter case, the RTC is still powered throughout, meaning there is no battery switch-over event). OTOH, we do not use the tamper detection - in fact, the TS signal is unconnected on our board.
We're currently still on 4.19, but we will eventually upgrade to a kernel containing the above commit. So I was wondering if we could figure out a way that would work for both of us - either some CONFIG knob, or perhaps something in the device-tree. Any ideas?
Rasmus
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