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Date: Tue, 26 Aug 2008 21:33:27 +0100 From: Matthew Garrett <mjg59@...f.ucam.org> To: Anton Vorontsov <avorontsov@...mvista.com> Cc: linux-kernel@...r.kernel.org Subject: Re: [PATCH] power-supply: Add function to return system-wide power state Something like this? diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c index cb1ccb4..6a687da 100644 --- a/drivers/power/power_supply_core.c +++ b/drivers/power/power_supply_core.c @@ -87,6 +87,31 @@ int power_supply_am_i_supplied(struct power_supply *psy) return error; } +static int __power_supply_is_system_supplied(struct device *dev, void *data) +{ + union power_supply_propval ret = {0,}; + struct power_supply *psy = dev_get_drvdata(dev); + + if (psy->type != POWER_SUPPLY_TYPE_BATTERY) { + if (psy->get_property(psy, + POWER_SUPPLY_PROP_ONLINE, &ret)) + return 0; + if (ret.intval) + return ret.intval; + } + return 0; +} + +int power_supply_is_system_supplied() +{ + int error; + + error = class_for_each_device(power_supply_class, NULL, NULL, + __power_supply_is_system_supplied); + + return error; +} + int power_supply_register(struct device *parent, struct power_supply *psy) { int rc = 0; @@ -148,6 +173,7 @@ static void __exit power_supply_class_exit(void) EXPORT_SYMBOL_GPL(power_supply_changed); EXPORT_SYMBOL_GPL(power_supply_am_i_supplied); +EXPORT_SYMBOL_GPL(power_supply_is_system_supplied); EXPORT_SYMBOL_GPL(power_supply_register); EXPORT_SYMBOL_GPL(power_supply_unregister); diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index ea96ead..304df22 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -164,11 +164,16 @@ struct power_supply_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_register(struct device *parent, struct power_supply *psy); extern void power_supply_unregister(struct power_supply *psy); +#ifdef CONFIG_POWER_SUPPLY +extern int power_supply_is_system_supplied(void); +#else +static int power_supply_is_system_supplied(void) { return -ENOSYS; } +#endif + /* For APM emulation, think legacy userspace. */ extern struct class *power_supply_class; -- Matthew Garrett | mjg59@...f.ucam.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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