power: pm8921-bms: dont use override mode if batfet is open
If the battery fet is open, the current sourced or sinked from the
battery is very low. There is a high chance that an open circuit
voltage(OCV) happens. Putting the BMS in override mode resets the timer
whose expiry causes an OCV.
Avoid putting the BMS in override mode if battery fet is open.
Change-Id: Idc463bcc55b51cf188cc8ee440a66f763654f174
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
diff --git a/drivers/power/pm8921-charger.c b/drivers/power/pm8921-charger.c
index 85b653d..bb996b7 100644
--- a/drivers/power/pm8921-charger.c
+++ b/drivers/power/pm8921-charger.c
@@ -327,6 +327,10 @@
return pm_chg_get_rt_status(chip, DCIN_VALID_IRQ);
}
+static int is_batfet_closed(struct pm8921_chg_chip *chip)
+{
+ return pm_chg_get_rt_status(chip, BATFET_IRQ);
+}
#define CAPTURE_FSM_STATE_CMD 0xC2
#define READ_BANK_7 0x70
#define READ_BANK_4 0x40
@@ -1741,6 +1745,15 @@
}
EXPORT_SYMBOL(pm8921_is_battery_present);
+int pm8921_is_batfet_closed(void)
+{
+ if (!the_chip) {
+ pr_err("called before init\n");
+ return -EINVAL;
+ }
+ return is_batfet_closed(the_chip);
+}
+EXPORT_SYMBOL(pm8921_is_batfet_closed);
/*
* Disabling the charge current limit causes current
* current limits to have no monitoring. An adequate charger