diff options
| -rw-r--r-- | drivers/power/supply/power_supply_core.c | 41 | ||||
| -rw-r--r-- | include/linux/power_supply.h | 2 |
2 files changed, 43 insertions, 0 deletions
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index df5374afd214..02c6340ae36f 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -371,6 +371,47 @@ int power_supply_is_system_supplied(void) } EXPORT_SYMBOL_GPL(power_supply_is_system_supplied); +static int __power_supply_get_supplier_max_current(struct device *dev, + void *data) +{ + union power_supply_propval ret = {0,}; + struct power_supply *epsy = dev_get_drvdata(dev); + struct power_supply *psy = data; + + if (__power_supply_is_supplied_by(epsy, psy)) + if (!epsy->desc->get_property(epsy, + POWER_SUPPLY_PROP_CURRENT_MAX, + &ret)) + return ret.intval; + + return 0; +} + +int power_supply_set_input_current_limit_from_supplier(struct power_supply *psy) +{ + union power_supply_propval val = {0,}; + int curr; + + if (!psy->desc->set_property) + return -EINVAL; + + /* + * This function is not intended for use with a supply with multiple + * suppliers, we simply pick the first supply to report a non 0 + * max-current. + */ + curr = class_for_each_device(power_supply_class, NULL, psy, + __power_supply_get_supplier_max_current); + if (curr <= 0) + return (curr == 0) ? -ENODEV : curr; + + val.intval = curr; + + return psy->desc->set_property(psy, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, &val); +} +EXPORT_SYMBOL_GPL(power_supply_set_input_current_limit_from_supplier); + int power_supply_set_battery_charged(struct power_supply *psy) { if (atomic_read(&psy->use_cnt) >= 0 && diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index de89066b72b1..79e90b3d3288 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -332,6 +332,8 @@ 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_input_current_limit_from_supplier( + struct power_supply *psy); extern int power_supply_set_battery_charged(struct power_supply *psy); #ifdef CONFIG_POWER_SUPPLY |