---

yaml
---
r: 350633
b: refs/heads/master
c: 75f2a21
h: refs/heads/master
i:
  350631: 24d6694
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ff38090aa2e1423e130cc72e790145bad7de8215
+refs/heads/master: 75f2a219ff11e6707903194009656820bba2d5c6

trunk/drivers/power/ab8500_fg.c

@@ -43,7 +43,7 @@
 
 #define NBR_AVG_SAMPLES			20
 
-#define LOW_BAT_CHECK_INTERVAL		(2 * HZ)
+#define LOW_BAT_CHECK_INTERVAL		(HZ / 16) /* 62.5 ms */
 
 #define VALID_CAPACITY_SEC		(45 * 60) /* 45 minutes */
 #define BATT_OK_MIN			2360 /* mV */
@@ -169,6 +169,7 @@ struct inst_curr_result_list {
  * @recovery_cnt:	Counter for recovery mode
  * @high_curr_cnt:	Counter for high current mode
  * @init_cnt:		Counter for init mode
+ * @low_bat_cnt		Counter for number of consecutive low battery measures
  * @nbr_cceoc_irq_cnt	Counter for number of CCEOC irqs received since enabled
  * @recovery_needed:	Indicate if recovery is needed
  * @high_curr_mode:	Indicate if we're in high current mode
@@ -210,6 +211,7 @@ struct ab8500_fg {
 	int recovery_cnt;
 	int high_curr_cnt;
 	int init_cnt;
+	int low_bat_cnt;
 	int nbr_cceoc_irq_cnt;
 	bool recovery_needed;
 	bool high_curr_mode;
@@ -1879,25 +1881,29 @@ static void ab8500_fg_low_bat_work(struct work_struct *work)
 
 	/* Check if LOW_BAT still fulfilled */
 	if (vbat < di->bm->fg_params->lowbat_threshold) {
-		di->flags.low_bat = true;
-		dev_warn(di->dev, "Battery voltage still LOW\n");
-
-		/*
-		 * We need to re-schedule this check to be able to detect
-		 * if the voltage increases again during charging
-		 */
-		queue_delayed_work(di->fg_wq, &di->fg_low_bat_work,
-			round_jiffies(LOW_BAT_CHECK_INTERVAL));
+		/* Is it time to shut down? */
+		if (di->low_bat_cnt < 1) {
+			di->flags.low_bat = true;
+			dev_warn(di->dev, "Shut down pending...\n");
+		} else {
+			/*
+			* Else we need to re-schedule this check to be able to detect
+			* if the voltage increases again during charging or
+			* due to decreasing load.
+			*/
+			di->low_bat_cnt--;
+			dev_warn(di->dev, "Battery voltage still LOW\n");
+			queue_delayed_work(di->fg_wq, &di->fg_low_bat_work,
+				round_jiffies(LOW_BAT_CHECK_INTERVAL));
+		}
 	} else {
-		di->flags.low_bat = false;
+		di->flags.low_bat_delay = false;
+		di->low_bat_cnt = 10;
 		dev_warn(di->dev, "Battery voltage OK again\n");
 	}
 
 	/* This is needed to dispatch LOW_BAT */
 	ab8500_fg_check_capacity_limits(di, false);
-
-	/* Set this flag to check if LOW_BAT IRQ still occurs */
-	di->flags.low_bat_delay = false;
 }
 
 /**
@@ -2056,6 +2062,7 @@ static irqreturn_t ab8500_fg_lowbatf_handler(int irq, void *_di)
 {
 	struct ab8500_fg *di = _di;
 
+	/* Initiate handling in ab8500_fg_low_bat_work() if not already initiated. */
 	if (!di->flags.low_bat_delay) {
 		dev_warn(di->dev, "Battery voltage is below LOW threshold\n");
 		di->flags.low_bat_delay = true;
@@ -2698,6 +2705,12 @@ static int ab8500_fg_probe(struct platform_device *pdev)
 	INIT_DEFERRABLE_WORK(&di->fg_check_hw_failure_work,
 		ab8500_fg_check_hw_failure_work);
 
+	/* Reset battery low voltage flag */
+	di->flags.low_bat = false;
+
+	/* Initialize low battery counter */
+	di->low_bat_cnt = 10;
+
 	/* Initialize OVV, and other registers */
 	ret = ab8500_fg_init_hw_registers(di);
 	if (ret) {