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Commit e5f5ccb6 authored by Daniel Mack's avatar Daniel Mack Committed by Anton Vorontsov
Browse files

power_supply: get_by_name and set_charged functionality 



This adds a function that indicates that a battery is fully charged.
It also includes functions to get a power_supply device from the class
of registered devices by name reference. These can be used to find a
specific battery to call power_supply_set_battery_charged() on.

Some battery drivers might need this information to calibrate
themselves.

Signed-off-by: default avatarDaniel Mack <daniel@caiaq.de>
Cc: Ian Molton <spyro@f2s.com>
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: Matt Reimer <mreimer@vpop.net>
Signed-off-by: default avatarAnton Vorontsov <cbouatmailru@gmail.com>
parent ff3417e7

drivers/power/power_supply_core.c

+28 −0
Original line number Diff line number Diff line
@@ -116,6 +116,34 @@ int power_supply_is_system_supplied(void) 
}

EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);



int power_supply_set_battery_charged(struct power_supply *psy)

{

	if (psy->type == POWER_SUPPLY_TYPE_BATTERY && psy->set_charged) {

		psy->set_charged(psy);

		return 0;

	}



	return -EINVAL;

}

EXPORT_SYMBOL_GPL(power_supply_set_battery_charged);



static int power_supply_match_device_by_name(struct device *dev, void *data)

{

	const char *name = data;

	struct power_supply *psy = dev_get_drvdata(dev);



	return strcmp(psy->name, name) == 0;

}



struct power_supply *power_supply_get_by_name(char *name)

{

	struct device *dev = class_find_device(power_supply_class, NULL, name,

					power_supply_match_device_by_name);



	return dev ? dev_get_drvdata(dev) : NULL;

}

EXPORT_SYMBOL_GPL(power_supply_get_by_name);



int power_supply_register(struct device *parent, struct power_supply *psy)

{

	int rc = 0;

include/linux/power_supply.h

+3 −0
Original line number Diff line number Diff line
@@ -144,6 +144,7 @@ struct power_supply { 
			    enum power_supply_property psp,

			    union power_supply_propval *val);

	void (*external_power_changed)(struct power_supply *psy);

	void (*set_charged)(struct power_supply *psy);



	/* For APM emulation, think legacy userspace. */

	int use_for_apm;
@@ -183,8 +184,10 @@ struct power_supply_info { 
	int use_for_apm;

};



extern struct power_supply *power_supply_get_by_name(char *name);

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);



#if defined(CONFIG_POWER_SUPPLY) || defined(CONFIG_POWER_SUPPLY_MODULE)

extern int power_supply_is_system_supplied(void);