Hi,
We're using the PCF85063A on our Compute Module 4 I/O board, and a number of
users have experienced problems with invalid state after inserting a backup
battery. So far the problem has been confined to EXT_TEST (bit 7 of CTRL_1)
being set, but there are a number of registers for which the driver only
modifies a subset of the bits.
I can think of a number of ways to clear this invalid state, none of which are
difficult - force a software reset whenever certain bits of certain registers
have certain values, always specifically force some bits to known values, etc. -
but are there any preferences or pitfalls to be aware of?
Thanks for your input,
Phil Elwell, Raspberry Pi
