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power: supply: core: Add power_supply_battery_info and API

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power_supply_get_battery_info() reads battery data from devicetree.
struct power_supply_battery_info provides battery data to drivers.
Its fields correspond to elements in enum power_supply_property.
Drivers may surface battery data in sysfs via corresponding
POWER_SUPPLY_PROP_* fields.

Signed-off-by: Matt Ranostay <[email protected]>
Signed-off-by: Liam Breck <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
This commit is contained in:
Liam Breck 2017-06-07 11:37:51 -07:00 • committed by Sebastian Reichel
commit c08b1f45d7
3 changed files with 91 additions and 0 deletions
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12
Documentation/power/power_supply_class.txt
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@ -174,6 +174,18 @@ issued by external power supply will notify supplicants via
external_power_changed callback.
Devicetree battery characteristics
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Drivers should call power_supply_get_battery_info() to obtain battery
characteristics from a devicetree battery node, defined in
Documentation/devicetree/bindings/power/supply/battery.txt. This is
implemented in drivers/power/supply/bq27xxx_battery.c.
Properties in struct power_supply_battery_info and their counterparts in the
battery node have names corresponding to elements in enum power_supply_property,
for naming consistency between sysfs attributes and battery node properties.
QA
~~
Q: Where is POWER_SUPPLY_PROP_XYZ attribute?