tree 8d16e013fa27f930efc34e14d9cfc4634d47353f
parent c90de6983cc09ab0c991afc689ce859331367518
author Kévin Redon <kredon@sysmocom.de> 1574772585 +0100
committer Kévin Redon <kredon@sysmocom.de> 1574772593 +0100

qmod: lower VCC threshold to 2.5V

on the QMOD board the VCC signal from the modem is measured using
an ADC (SIMtrace board just use card detect).
the threshold to consider VCC as activated was set to 2.8V, which
gives a bit of margin for the expected 3.0V.
still, we had one board where the voltage was 2.8V.
to be resilient against lower than expected voltages from
modems (or boards), we lowered the threshold to 2.5V.
this is still save for the SAM3S to correctly identify high/low
levels.

Change-Id: Iac2778903690045e4e63fef29f812205d00c28ed