2 * LEDs triggers for power supply class
4 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
5 * Copyright © 2004 Szabolcs Gyurko
6 * Copyright © 2003 Ian Molton <spyro@f2s.com>
8 * Modified: 2004, Oct Szabolcs Gyurko
10 * You may use this code as per GPL version 2
13 #include <linux/power_supply.h>
15 /* Battery specific LEDs triggers. */
17 static void power_supply_update_bat_leds(struct power_supply *psy)
19 union power_supply_propval status;
21 if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
24 dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, status.intval);
26 switch (status.intval) {
27 case POWER_SUPPLY_STATUS_FULL:
28 led_trigger_event(psy->charging_full_trig, LED_FULL);
29 led_trigger_event(psy->charging_trig, LED_OFF);
30 led_trigger_event(psy->full_trig, LED_FULL);
32 case POWER_SUPPLY_STATUS_CHARGING:
33 led_trigger_event(psy->charging_full_trig, LED_FULL);
34 led_trigger_event(psy->charging_trig, LED_FULL);
35 led_trigger_event(psy->full_trig, LED_OFF);
38 led_trigger_event(psy->charging_full_trig, LED_OFF);
39 led_trigger_event(psy->charging_trig, LED_OFF);
40 led_trigger_event(psy->full_trig, LED_OFF);
47 static int power_supply_create_bat_triggers(struct power_supply *psy)
51 psy->charging_full_trig_name = kmalloc(strlen(psy->name) +
52 sizeof("-charging-or-full"), GFP_KERNEL);
53 if (!psy->charging_full_trig_name)
54 goto charging_full_failed;
56 psy->charging_trig_name = kmalloc(strlen(psy->name) +
57 sizeof("-charging"), GFP_KERNEL);
58 if (!psy->charging_trig_name)
61 psy->full_trig_name = kmalloc(strlen(psy->name) +
62 sizeof("-full"), GFP_KERNEL);
63 if (!psy->full_trig_name)
66 strcpy(psy->charging_full_trig_name, psy->name);
67 strcat(psy->charging_full_trig_name, "-charging-or-full");
68 strcpy(psy->charging_trig_name, psy->name);
69 strcat(psy->charging_trig_name, "-charging");
70 strcpy(psy->full_trig_name, psy->name);
71 strcat(psy->full_trig_name, "-full");
73 led_trigger_register_simple(psy->charging_full_trig_name,
74 &psy->charging_full_trig);
75 led_trigger_register_simple(psy->charging_trig_name,
77 led_trigger_register_simple(psy->full_trig_name,
83 kfree(psy->charging_trig_name);
85 kfree(psy->charging_full_trig_name);
92 static void power_supply_remove_bat_triggers(struct power_supply *psy)
94 led_trigger_unregister_simple(psy->charging_full_trig);
95 led_trigger_unregister_simple(psy->charging_trig);
96 led_trigger_unregister_simple(psy->full_trig);
97 kfree(psy->full_trig_name);
98 kfree(psy->charging_trig_name);
99 kfree(psy->charging_full_trig_name);
103 /* Generated power specific LEDs triggers. */
105 static void power_supply_update_gen_leds(struct power_supply *psy)
107 union power_supply_propval online;
109 if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
112 dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, online.intval);
115 led_trigger_event(psy->online_trig, LED_FULL);
117 led_trigger_event(psy->online_trig, LED_OFF);
122 static int power_supply_create_gen_triggers(struct power_supply *psy)
126 psy->online_trig_name = kmalloc(strlen(psy->name) + sizeof("-online"),
128 if (!psy->online_trig_name)
131 strcpy(psy->online_trig_name, psy->name);
132 strcat(psy->online_trig_name, "-online");
134 led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
144 static void power_supply_remove_gen_triggers(struct power_supply *psy)
146 led_trigger_unregister_simple(psy->online_trig);
147 kfree(psy->online_trig_name);
151 /* Choice what triggers to create&update. */
153 void power_supply_update_leds(struct power_supply *psy)
155 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
156 power_supply_update_bat_leds(psy);
158 power_supply_update_gen_leds(psy);
162 int power_supply_create_triggers(struct power_supply *psy)
164 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
165 return power_supply_create_bat_triggers(psy);
166 return power_supply_create_gen_triggers(psy);
169 void power_supply_remove_triggers(struct power_supply *psy)
171 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
172 power_supply_remove_bat_triggers(psy);
174 power_supply_remove_gen_triggers(psy);