[PATCH v5 3/9] power: supply: qcom_battmgr: Add resistance power supply property
From: Fenglin Wu via B4 Relay <devnull+fenglin.wu.oss.qualcomm.com@kernel.org>
Date: 2025-09-17 10:15:30
Also in:
b4-sent, linux-arm-msm, linux-pm, linux-usb, lkml
Subsystem:
arm/qualcomm mailing list, power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
From: Fenglin Wu <redacted> Add power supply property to get battery internal resistance from the battery management firmware. Signed-off-by: Fenglin Wu <redacted> --- 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