In the charger applet, it is possible for the PMIC to take some time
to negotiate and enable the charging current. Previously, the code
proceeded immediately, which could lead to false-positive power-off
triggers if current hadn't started flowing yet.
This change:
1. Implements a 3000ms stopwatch-based timeout.
2. Polls get_battery_icurr_ma() until a non-zero current is detected.
3. Aborts the applet if current fails to stabilize within the window.
4. Adds logging to track the actual duration of the power-up sequence.
BUG=none
BRANCH=none
TEST=Verified that the system enters off-mode charging more reliably
without powering off.
```
[INFO ] Inside launch_charger_applet. Initiating charging
...
...
[INFO ] Issuing power-off due to change in charging state.
...
...
```
Change-Id: Ie3501dff06aadf81d527658c4042de7c92de24b5
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91547
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
762b564f3b