diff options
| author | Fenglin Wu <fenglin.wu@oss.qualcomm.com> | 2025-09-17 18:15:14 +0800 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2025-09-18 01:01:03 +0200 |
| commit | d69ae81efbc95c94a2760fc82d27cdab4c26fe76 (patch) | |
| tree | 043b46c5a013c994036000b73f158af1e8634964 | |
| parent | 1bafaa156ed3881cd4f187ab1c43e408742e1f11 (diff) | |
power: supply: core: Add resistance power supply property
Some battery drivers provide the ability to export internal resistance
as a parameter. Add internal_resistance power supply property for that
purpose.
Signed-off-by: Fenglin Wu <fenglin.wu@oss.qualcomm.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-power | 16 | ||||
| -rw-r--r-- | drivers/power/supply/power_supply_sysfs.c | 1 | ||||
| -rw-r--r-- | include/linux/power_supply.h | 1 |
3 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power index 87a058e14e7e..e6cce423c632 100644 --- a/Documentation/ABI/testing/sysfs-class-power +++ b/Documentation/ABI/testing/sysfs-class-power @@ -553,6 +553,22 @@ Description: Integer > 0: representing full cycles Integer = 0: cycle_count info is not available +What: /sys/class/power_supply/<supply_name>/internal_resistance +Date: August 2025 +Contact: linux-arm-msm@vger.kernel.org +Description: + Represent the battery's internal resistance, often referred + to as Equivalent Series Resistance (ESR). It is a dynamic + parameter that reflects the opposition to current flow within + the cell. It is not a fixed value but varies significantly + based on several operational conditions, including battery + state of charge (SoC), temperature, and whether the battery + is in a charging or discharging state. + + Access: Read + + Valid values: Represented in microohms + **USB Properties** What: /sys/class/power_supply/<supply_name>/input_current_limit diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c index 18e5e84a81c6..8ba08d456352 100644 --- a/drivers/power/supply/power_supply_sysfs.c +++ b/drivers/power/supply/power_supply_sysfs.c @@ -223,6 +223,7 @@ static struct power_supply_attr power_supply_attrs[] __ro_after_init = { POWER_SUPPLY_ATTR(MANUFACTURE_YEAR), POWER_SUPPLY_ATTR(MANUFACTURE_MONTH), POWER_SUPPLY_ATTR(MANUFACTURE_DAY), + POWER_SUPPLY_ATTR(INTERNAL_RESISTANCE), /* Properties of type `const char *' */ POWER_SUPPLY_ATTR(MODEL_NAME), POWER_SUPPLY_ATTR(MANUFACTURER), diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index f21f806bfb38..f38da7c039d2 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -176,6 +176,7 @@ enum power_supply_property { POWER_SUPPLY_PROP_MANUFACTURE_YEAR, POWER_SUPPLY_PROP_MANUFACTURE_MONTH, POWER_SUPPLY_PROP_MANUFACTURE_DAY, + POWER_SUPPLY_PROP_INTERNAL_RESISTANCE, /* Properties of type `const char *' */ POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_MANUFACTURER, |