[PATCHv1 02/19] power: supply: core: add capacity error margin property
From: Sebastian Reichel <hidden>
Date: 2020-05-13 18:56:35
Also in:
linux-pm, lkml
Subsystem:
power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
Add a property for reporting the error margin expected by fuel gauge chips. Signed-off-by: Sebastian Reichel <redacted> --- Documentation/ABI/testing/sysfs-class-power | 15 +++++++++++++++ drivers/power/supply/power_supply_sysfs.c | 1 + include/linux/power_supply.h | 1 + 3 files changed, 17 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index bf3b48f022dc..2f896555ae23 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power@@ -74,6 +74,21 @@ Description: Access: Read, Write Valid values: 0 - 100 (percent) +What: /sys/class/power_supply/<supply_name>/capacity_error_margin +Date: April 2019 +Contact: linux-pm@vger.kernel.org +Description: + Battery capacity measurement becomes unreliable without + recalibration. This values provides the maximum error + margin expected to exist by the fuel gauge in percent. + Values close to 0% will be returned after (re-)calibration + has happened. Over time the error margin will increase. + 100% means, that the capacity related values are basically + completely useless. + + Access: Read + Valid values: 0 - 100 (percent) + What: /sys/class/power_supply/<supply_name>/capacity_level Date: June 2009 Contact: linux-pm@vger.kernel.org
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index d21b4e0edf38..e664774a2d1e 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c@@ -178,6 +178,7 @@ static struct power_supply_attr power_supply_attrs[] = { POWER_SUPPLY_ATTR(CAPACITY), POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN), POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX), + POWER_SUPPLY_ATTR(CAPACITY_ERROR_MARGIN), POWER_SUPPLY_ENUM_ATTR(CAPACITY_LEVEL), POWER_SUPPLY_ATTR(TEMP), POWER_SUPPLY_ATTR(TEMP_MAX),
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 1f60731ec7fe..453a85f25635 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h@@ -139,6 +139,7 @@ enum power_supply_property { POWER_SUPPLY_PROP_CAPACITY, /* in percents! */ POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, /* in percents! */ POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX, /* in percents! */ + POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN, /* in percents! */ POWER_SUPPLY_PROP_CAPACITY_LEVEL, POWER_SUPPLY_PROP_TEMP, POWER_SUPPLY_PROP_TEMP_MAX,
--
2.26.2