Commit bac705ab authored by Sebastian Reichel's avatar Sebastian Reichel
Browse files

power: supply: core: add capacity error margin property 



Add a property for reporting the error margin expected
by fuel gauge chips.

Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent 655078f5

Documentation/ABI/testing/sysfs-class-power

+15 −0
Original line number Diff line number Diff line
@@ -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

drivers/power/supply/power_supply_sysfs.c

+1 −0
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@@ -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),

include/linux/power_supply.h

+1 −0
Original line number Diff line number Diff line
@@ -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,