power: supply: ln8411: Clears CP_EN when protection fault is hit

Clears CP_EN through power_supply when any of the COMP_FLAG
protections mentioned in 'Protections' in the d/s are tripped.

This is necessary as CP_EN does not autoclear after a protection
fault.

Change-Id: Id649eda39ff630eb2a77ac7ce683e61848d9f9ad
Signed-off-by: Ricardo Rivera-Matos <[email protected]>

Author: rriveramcrus

drivers/power/supply/ln8411_charger.c

@@ -874,32 +874,39 @@ static int ln8411_post_irq_handler(void *irq_drv_data)
 {
 	struct ln8411_device *ln8411 = irq_drv_data;
 	union power_supply_propval val = {0};
+	bool protect_flt_set = false;
 	unsigned int reg;
 	int ret;
 
 	ret = regmap_read(ln8411->regmap, LN8411_COMP_FLAG0, &reg);
 	if (ret)
 		return ret;
 
-	/* CP_EN bit does not auto clear during unplug, must be manually cleared*/
-	if (reg & LN8411_IBUS_UCP_FALL_FLAG) {
-		val.intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
-
-		ret = power_supply_set_property(ln8411->charger, POWER_SUPPLY_PROP_STATUS, &val);
-		if (ret)
-			return ret;
-
-		dev_dbg(ln8411->dev, "Unplug detected, disabling converter\n");
-	}
+	if (reg & LN8411_PROTECT_FLTS_COMP_FLAG0)
+		protect_flt_set = true;
 
 	dev_dbg(ln8411->dev, "COMP_FLAG0: 0x%x\n", reg);
 
 	ret = regmap_read(ln8411->regmap, LN8411_COMP_FLAG1, &reg);
 	if (ret)
 		return ret;
 
+	if (reg & LN8411_PROTECT_FLTS_COMP_FLAG1)
+		protect_flt_set = true;
+
 	dev_dbg(ln8411->dev, "COMP_FLAG1: 0x%x\n", reg);
 
+	/* CP_EN bit does not auto clear during protection fault, must be manually cleared */
+	if (protect_flt_set) {
+		val.intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+
+		ret = power_supply_set_property(ln8411->charger, POWER_SUPPLY_PROP_STATUS, &val);
+		if (ret)
+			return ret;
+
+		dev_dbg(ln8411->dev, "Fault detected, disabling converter\n");
+	}
+
 	ret = regmap_set_bits(ln8411->regmap, LN8411_LION_INT_MASK_2, LN8411_CLEAR_INT);
 	if (ret)
 		return ret;

drivers/power/supply/ln8411_charger.h

@@ -392,6 +392,16 @@
 #define LN8411_OTG_MIN_1TO2_MIN_UV	(LN8411_OTG_MIN_UV * 2)
 #define LN8411_OTG_MIN_1TO4_MIN_UV	(LN8411_OTG_MIN_UV * 4)
 
+#define LN8411_PROTECT_FLTS_COMP_FLAG0	(LN8411_VUSB_OVP_FLAG | \
+					 LN8411_VWPC_OVP_FLAG | \
+					 LN8411_IBUS_OCP_FLAG | \
+					 LN8411_IBUS_UCP_FALL_FLAG | \
+					 LN8411_VBAT_OVP_FLAG | \
+					 LN8411_IBAT_OCP_FLAG)
+
+#define LN8411_PROTECT_FLTS_COMP_FLAG1	(LN8411_PMID2OUT_UVP_FLAG | \
+					 LN8411_PMID2OUT_OVP_FLAG)
+
 enum ln8411_roles {
 	LN8411_USB = 0,
 	LN8411_DUAL,