power: pm8921-charger: support temperature less configurations
There could be configurations where the voltage that appears on
the batt_therm line is out of specification and makes the battery
temperature comparators (btc) useless i.e. the comparators could
trigger when the battery is not really cold or hot.
Add software support to monitor battery temperature. While charging
start a worker which polls the temperature every few (configurable) ms.
If the temperature is hot or cold override btc to force hot or cold
which in turn feeds in to the charging FSM and disables charging.
When the temperature comes back to normal override btc to force normal
temperature. Note that when the temperature goes out of range while
charging the end of charge worker still runs, we can run the btc worker
piggy backed on that wakelock.
Change-Id: I1293ecc2974bae4ad530ecb775cd19072e413c72
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
2 files changed