Report the remaining time to full as calculated by the firmware.
Similar to time to empty, the reported value is only meaningful when
charging, i.e. if it is != U16_MAX.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
---
 drivers/power/supply/max17042_battery.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c
index 89909b140cf9..cf8602d925a2 100644
--- a/drivers/power/supply/max17042_battery.c
+++ b/drivers/power/supply/max17042_battery.c
@@ -89,6 +89,7 @@ static enum power_supply_property max17042_battery_props[] = {
 	POWER_SUPPLY_PROP_HEALTH,
 	POWER_SUPPLY_PROP_SCOPE,
 	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+	POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
 	// these two have to be at the end on the list
 	POWER_SUPPLY_PROP_CURRENT_NOW,
 	POWER_SUPPLY_PROP_CURRENT_AVG,
@@ -447,6 +448,23 @@ static int max17042_get_property(struct power_supply *psy,
 		if (data == U16_MAX)
 			return -ENODATA;
 
+		val->intval = data * 5625 / 1000;
+		break;
+	case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
+		if (chip->chip_type != MAXIM_DEVICE_TYPE_MAX17047 &&
+		    chip->chip_type != MAXIM_DEVICE_TYPE_MAX17050 &&
+		    chip->chip_type != MAXIM_DEVICE_TYPE_MAX17055 &&
+		    chip->chip_type != MAXIM_DEVICE_TYPE_MAX77759)
+			return -EINVAL;
+
+		ret = regmap_read(map, MAX17055_TTF, &data);
+		if (ret < 0)
+			return ret;
+
+		/* when discharging, the value is not meaningful */
+		if (data == U16_MAX)
+			return -ENODATA;
+
 		val->intval = data * 5625 / 1000;
 		break;
 	default:

-- 
2.53.0.414.gf7e9f6c205-goog