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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 <matt@ranostay.consulting>
Signed-off-by: Liam Breck <kernel@networkimprov.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
This commit is contained in:
Liam Breck 2017-06-07 11:37:51 -07:00 • committed by Sebastian Reichel
parent 230670479a
commit c08b1f45d7
3 changed files with 91 additions and 0 deletions
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22
include/linux/power_supply.h
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@ -289,6 +289,25 @@ struct power_supply_info {
int use_for_apm;
};
/*
* This is the recommended struct to manage static battery parameters,
* populated by power_supply_get_battery_info(). Most platform drivers should
* use these for consistency.
* Its field names must correspond to elements in enum power_supply_property.
* The default field value is -EINVAL.
* Power supply class itself doesn't use this.
*/
struct power_supply_battery_info {
int energy_full_design_uwh; /* microWatt-hours */
int charge_full_design_uah; /* microAmp-hours */
int voltage_min_design_uv; /* microVolts */
int precharge_current_ua; /* microAmps */
int charge_term_current_ua; /* microAmps */
int constant_charge_current_max_ua; /* microAmps */
int constant_charge_voltage_max_uv; /* microVolts */
};
extern struct atomic_notifier_head power_supply_notifier;
extern int power_supply_reg_notifier(struct notifier_block *nb);
extern void power_supply_unreg_notifier(struct notifier_block *nb);
@ -307,6 +326,9 @@ static inline struct power_supply *
devm_power_supply_get_by_phandle(struct device *dev, const char *property)
{ return NULL; }
#endif /* CONFIG_OF */
extern int power_supply_get_battery_info(struct power_supply *psy,
struct power_supply_battery_info *info);
extern void power_supply_changed(struct power_supply *psy);
extern int power_supply_am_i_supplied(struct power_supply *psy);
extern int power_supply_set_battery_charged(struct power_supply *psy);