Issue 654: MODEM killswitch (power switch) - handle gracefully

Reported by Joerg Reisenweber, Sep 1, 2014

Shutting down modem power by an external switch can create issues 
with both modem's internal flash as well as the flash in SIM.

To mitigate, we should give modem a chance to shut down gracefully 
before we cut power.

To implement, I suggest:
1) asserting EMERGENCY_SHUTDOWN as soon as SoC shuts down the 
external power switch by toggling the control line.
2) delay on->off transition of actual power switch by a maybe 1s 
after SoC toggled the control line

Comment 1 by Nikolaus Schaller, Dec 14, 2020

Status: WontFix

Created: 9 years 6 months ago by Joerg Reisenweber

Updated: 3 years 2 months ago

Status: WontFix

Followed by: 1 person