power: supply: qcom_battmgr: Add resistance power supply property

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

Signed-off-by: Fenglin Wu <fenglin.wu@oss.qualcomm.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
index fdb2d1b883fc58058f7497dd45d8a1641c388f9e..fc3058d038b14e0b27a4d89030c74aa0032c6d16 100644 (file)
--- 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,
 };
 
@@ -584,6 +587,9 @@ 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;
@@ -668,6 +674,7 @@ 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,
 };
 
@@ -1200,6 +1207,9 @@ 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;