diff options
| author | Sebastian Reichel <sebastian.reichel@collabora.com> | 2020-05-13 20:55:58 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2020-05-28 19:25:31 +0200 |
| commit | bac705abcf345c28e419157cfcd1c44032cc9db2 (patch) | |
| tree | 596f722e8b96228cfefbf2345bc04f4a7b7b4879 | |
| parent | 655078f5f5286fe0ab38e90c4695001a0e15e9dd (diff) | |
power: supply: core: add capacity error margin property
Add a property for reporting the error margin expected
by fuel gauge chips.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-power | 15 | ||||
| -rw-r--r-- | drivers/power/supply/power_supply_sysfs.c | 1 | ||||
| -rw-r--r-- | include/linux/power_supply.h | 1 |
3 files changed, 17 insertions, 0 deletions
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, |