From: Fenglin Wu <fenglin.wu@oss.qualcomm.com>

Add power supply property to get battery internal resistance from
the battery management firmware.

Signed-off-by: Fenglin Wu <fenglin.wu@oss.qualcomm.com>
---
 drivers/power/supply/qcom_battmgr.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
index fe27676fbc7cd12292caa6fb3b5b46a18c426e6d..6026266907c9dfd902240d451a0d1c50fa5dbc59 100644
--- a/drivers/power/supply/qcom_battmgr.c
+++ b/drivers/power/supply/qcom_battmgr.c
@@ -2,6 +2,7 @@
 /*
  * Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
  * Copyright (c) 2022, Linaro Ltd
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
  */
 #include <linux/auxiliary_bus.h>
 #include <linux/module.h>
@@ -254,6 +255,7 @@ struct qcom_battmgr_status {
 	unsigned int voltage_now;
 	unsigned int voltage_ocv;
 	unsigned int temperature;
+	unsigned int resistance;
 
 	unsigned int discharge_time;
 	unsigned int charge_time;
@@ -418,6 +420,7 @@ static const u8 sm8350_bat_prop_map[] = {
 	[POWER_SUPPLY_PROP_MODEL_NAME] = BATT_MODEL_NAME,
 	[POWER_SUPPLY_PROP_TIME_TO_FULL_AVG] = BATT_TTF_AVG,
 	[POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG] = BATT_TTE_AVG,
+	[POWER_SUPPLY_PROP_INTERNAL_RESISTANCE] = BATT_RESISTANCE,
 	[POWER_SUPPLY_PROP_POWER_NOW] = BATT_POWER_NOW,
 };
 
@@ -582,6 +585,9 @@ static int qcom_battmgr_bat_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_TEMP:
 		val->intval = battmgr->status.temperature;
 		break;
+	case POWER_SUPPLY_PROP_INTERNAL_RESISTANCE:
+		val->intval = battmgr->status.resistance;
+		break;
 	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
 		val->intval = battmgr->status.discharge_time;
 		break;
@@ -665,6 +671,7 @@ static const enum power_supply_property sm8350_bat_props[] = {
 	POWER_SUPPLY_PROP_MODEL_NAME,
 	POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
 	POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+	POWER_SUPPLY_PROP_INTERNAL_RESISTANCE,
 	POWER_SUPPLY_PROP_POWER_NOW,
 };
 
@@ -1174,6 +1181,9 @@ static void qcom_battmgr_sm8350_callback(struct qcom_battmgr *battmgr,
 		case BATT_TTE_AVG:
 			battmgr->status.discharge_time = le32_to_cpu(resp->intval.value);
 			break;
+		case BATT_RESISTANCE:
+			battmgr->status.resistance = le32_to_cpu(resp->intval.value);
+			break;
 		case BATT_POWER_NOW:
 			battmgr->status.power_now = le32_to_cpu(resp->intval.value);
 			break;

-- 
2.34.1