/* * LEDs triggers for power supply class * * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> * Copyright © 2004 Szabolcs Gyurko * Copyright © 2003 Ian Molton <spyro@f2s.com> * * Modified: 2004, Oct Szabolcs Gyurko * * You may use this code as per GPL version 2 */ #include <linux/kernel.h> #include <linux/power_supply.h> #include <linux/slab.h> #include "power_supply.h" /* Battery specific LEDs triggers. */ static void power_supply_update_bat_leds(struct power_supply *psy) { union power_supply_propval status; if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status)) return; dev_dbg(psy->dev, "%s %d\n", __func__, status.intval); switch (status.intval) { case POWER_SUPPLY_STATUS_FULL: led_trigger_event(psy->charging_full_trig, LED_FULL); led_trigger_event(psy->charging_trig, LED_OFF); led_trigger_event(psy->full_trig, LED_FULL); break; case POWER_SUPPLY_STATUS_CHARGING: led_trigger_event(psy->charging_full_trig, LED_FULL); led_trigger_event(psy->charging_trig, LED_FULL); led_trigger_event(psy->full_trig, LED_OFF); break; default: led_trigger_event(psy->charging_full_trig, LED_OFF); led_trigger_event(psy->charging_trig, LED_OFF); led_trigger_event(psy->full_trig, LED_OFF); break; } } static int power_supply_create_bat_triggers(struct power_supply *psy) { int rc = 0; psy->charging_full_trig_name = kasprintf(GFP_KERNEL, "%s-charging-or-full", psy->name); if (!psy->charging_full_trig_name) goto charging_full_failed; psy->charging_trig_name = kasprintf(GFP_KERNEL, "%s-charging", psy->name); if (!psy->charging_trig_name) goto charging_failed; psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name); if (!psy->full_trig_name) goto full_failed; led_trigger_register_simple(psy->charging_full_trig_name, &psy->charging_full_trig); led_trigger_register_simple(psy->charging_trig_name, &psy->charging_trig); led_trigger_register_simple(psy->full_trig_name, &psy->full_trig); goto success; full_failed: kfree(psy->charging_trig_name); charging_failed: kfree(psy->charging_full_trig_name); charging_full_failed: rc = -ENOMEM; success: return rc; } static void power_supply_remove_bat_triggers(struct power_supply *psy) { led_trigger_unregister_simple(psy->charging_full_trig); led_trigger_unregister_simple(psy->charging_trig); led_trigger_unregister_simple(psy->full_trig); kfree(psy->full_trig_name); kfree(psy->charging_trig_name); kfree(psy->charging_full_trig_name); } /* Generated power specific LEDs triggers. */ static void power_supply_update_gen_leds(struct power_supply *psy) { union power_supply_propval online; if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online)) return; dev_dbg(psy->dev, "%s %d\n", __func__, online.intval); if (online.intval) led_trigger_event(psy->online_trig, LED_FULL); else led_trigger_event(psy->online_trig, LED_OFF); } static int power_supply_create_gen_triggers(struct power_supply *psy) { int rc = 0; psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name); if (!psy->online_trig_name) goto online_failed; led_trigger_register_simple(psy->online_trig_name, &psy->online_trig); goto success; online_failed: rc = -ENOMEM; success: return rc; } static void power_supply_remove_gen_triggers(struct power_supply *psy) { led_trigger_unregister_simple(psy->online_trig); kfree(psy->online_trig_name); } /* Choice what triggers to create&update. */ void power_supply_update_leds(struct power_supply *psy) { if (psy->type == POWER_SUPPLY_TYPE_BATTERY) power_supply_update_bat_leds(psy); else power_supply_update_gen_leds(psy); } int power_supply_create_triggers(struct power_supply *psy) { if (psy->type == POWER_SUPPLY_TYPE_BATTERY) return power_supply_create_bat_triggers(psy); return power_supply_create_gen_triggers(psy); } void power_supply_remove_triggers(struct power_supply *psy) { if (psy->type == POWER_SUPPLY_TYPE_BATTERY) power_supply_remove_bat_triggers(psy); else power_supply_remove_gen_triggers(psy); }