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/kernel.h>
14 #include <linux/power_supply.h>
15 #include <linux/slab.h>
17 #include "power_supply.h"
19 /* Battery specific LEDs triggers. */
21 static void power_supply_update_bat_leds(struct power_supply *psy)
23 union power_supply_propval status;
24 unsigned long delay_on = 0;
25 unsigned long delay_off = 0;
27 if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
30 dev_dbg(psy->dev, "%s %d\n", __func__, status.intval);
32 switch (status.intval) {
33 case POWER_SUPPLY_STATUS_FULL:
34 led_trigger_event(psy->charging_full_trig, LED_FULL);
35 led_trigger_event(psy->charging_trig, LED_OFF);
36 led_trigger_event(psy->full_trig, LED_FULL);
37 led_trigger_event(psy->charging_blink_full_solid_trig,
40 case POWER_SUPPLY_STATUS_CHARGING:
41 led_trigger_event(psy->charging_full_trig, LED_FULL);
42 led_trigger_event(psy->charging_trig, LED_FULL);
43 led_trigger_event(psy->full_trig, LED_OFF);
44 led_trigger_blink(psy->charging_blink_full_solid_trig,
45 &delay_on, &delay_off);
48 led_trigger_event(psy->charging_full_trig, LED_OFF);
49 led_trigger_event(psy->charging_trig, LED_OFF);
50 led_trigger_event(psy->full_trig, LED_OFF);
51 led_trigger_event(psy->charging_blink_full_solid_trig,
57 static int power_supply_create_bat_triggers(struct power_supply *psy)
61 psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
62 "%s-charging-or-full", psy->name);
63 if (!psy->charging_full_trig_name)
64 goto charging_full_failed;
66 psy->charging_trig_name = kasprintf(GFP_KERNEL,
67 "%s-charging", psy->name);
68 if (!psy->charging_trig_name)
71 psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
72 if (!psy->full_trig_name)
75 psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
76 "%s-charging-blink-full-solid", psy->name);
77 if (!psy->charging_blink_full_solid_trig_name)
78 goto charging_blink_full_solid_failed;
80 led_trigger_register_simple(psy->charging_full_trig_name,
81 &psy->charging_full_trig);
82 led_trigger_register_simple(psy->charging_trig_name,
84 led_trigger_register_simple(psy->full_trig_name,
86 led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
87 &psy->charging_blink_full_solid_trig);
91 charging_blink_full_solid_failed:
92 kfree(psy->full_trig_name);
94 kfree(psy->charging_trig_name);
96 kfree(psy->charging_full_trig_name);
103 static void power_supply_remove_bat_triggers(struct power_supply *psy)
105 led_trigger_unregister_simple(psy->charging_full_trig);
106 led_trigger_unregister_simple(psy->charging_trig);
107 led_trigger_unregister_simple(psy->full_trig);
108 led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
109 kfree(psy->charging_blink_full_solid_trig_name);
110 kfree(psy->full_trig_name);
111 kfree(psy->charging_trig_name);
112 kfree(psy->charging_full_trig_name);
115 /* Generated power specific LEDs triggers. */
117 static void power_supply_update_gen_leds(struct power_supply *psy)
119 union power_supply_propval online;
121 if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
124 dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);
127 led_trigger_event(psy->online_trig, LED_FULL);
129 led_trigger_event(psy->online_trig, LED_OFF);
132 static int power_supply_create_gen_triggers(struct power_supply *psy)
136 psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
137 if (!psy->online_trig_name)
140 led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
150 static void power_supply_remove_gen_triggers(struct power_supply *psy)
152 led_trigger_unregister_simple(psy->online_trig);
153 kfree(psy->online_trig_name);
156 /* Choice what triggers to create&update. */
158 void power_supply_update_leds(struct power_supply *psy)
160 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
161 power_supply_update_bat_leds(psy);
163 power_supply_update_gen_leds(psy);
166 int power_supply_create_triggers(struct power_supply *psy)
168 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
169 return power_supply_create_bat_triggers(psy);
170 return power_supply_create_gen_triggers(psy);
173 void power_supply_remove_triggers(struct power_supply *psy)
175 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
176 power_supply_remove_bat_triggers(psy);
178 power_supply_remove_gen_triggers(psy);