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 union power_supply_propval current_now;
25 unsigned long delay_on = 0;
26 unsigned long delay_off = 0;
28 if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
31 dev_dbg(psy->dev, "%s %d\n", __func__, status.intval);
33 switch (status.intval) {
34 case POWER_SUPPLY_STATUS_FULL:
35 psy->get_property(psy, POWER_SUPPLY_PROP_CURRENT_NOW,
37 led_trigger_event(psy->charging_full_trig, LED_FULL);
38 led_trigger_event(psy->charging_trig,
39 current_now.intval > 0 ? LED_FULL : LED_OFF);
40 led_trigger_event(psy->full_trig, LED_FULL);
41 led_trigger_event(psy->charging_blink_full_solid_trig,
44 case POWER_SUPPLY_STATUS_CHARGING:
45 led_trigger_event(psy->charging_full_trig, LED_FULL);
46 led_trigger_event(psy->charging_trig, LED_FULL);
47 led_trigger_event(psy->full_trig, LED_OFF);
48 led_trigger_blink(psy->charging_blink_full_solid_trig,
49 &delay_on, &delay_off);
52 led_trigger_event(psy->charging_full_trig, LED_OFF);
53 led_trigger_event(psy->charging_trig, LED_OFF);
54 led_trigger_event(psy->full_trig, LED_OFF);
55 led_trigger_event(psy->charging_blink_full_solid_trig,
61 static int power_supply_create_bat_triggers(struct power_supply *psy)
65 psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
66 "%s-charging-or-full", psy->name);
67 if (!psy->charging_full_trig_name)
68 goto charging_full_failed;
70 psy->charging_trig_name = kasprintf(GFP_KERNEL,
71 "%s-charging", psy->name);
72 if (!psy->charging_trig_name)
75 psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
76 if (!psy->full_trig_name)
79 psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
80 "%s-charging-blink-full-solid", psy->name);
81 if (!psy->charging_blink_full_solid_trig_name)
82 goto charging_blink_full_solid_failed;
84 led_trigger_register_simple(psy->charging_full_trig_name,
85 &psy->charging_full_trig);
86 led_trigger_register_simple(psy->charging_trig_name,
88 led_trigger_register_simple(psy->full_trig_name,
90 led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
91 &psy->charging_blink_full_solid_trig);
95 charging_blink_full_solid_failed:
96 kfree(psy->full_trig_name);
98 kfree(psy->charging_trig_name);
100 kfree(psy->charging_full_trig_name);
101 charging_full_failed:
107 static void power_supply_remove_bat_triggers(struct power_supply *psy)
109 led_trigger_unregister_simple(psy->charging_full_trig);
110 led_trigger_unregister_simple(psy->charging_trig);
111 led_trigger_unregister_simple(psy->full_trig);
112 led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
113 kfree(psy->charging_blink_full_solid_trig_name);
114 kfree(psy->full_trig_name);
115 kfree(psy->charging_trig_name);
116 kfree(psy->charging_full_trig_name);
119 /* Generated power specific LEDs triggers. */
121 static void power_supply_update_gen_leds(struct power_supply *psy)
123 union power_supply_propval online;
125 if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
128 dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);
131 led_trigger_event(psy->online_trig, LED_FULL);
133 led_trigger_event(psy->online_trig, LED_OFF);
136 static int power_supply_create_gen_triggers(struct power_supply *psy)
140 psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
141 if (!psy->online_trig_name)
144 led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
154 static void power_supply_remove_gen_triggers(struct power_supply *psy)
156 led_trigger_unregister_simple(psy->online_trig);
157 kfree(psy->online_trig_name);
160 /* Choice what triggers to create&update. */
162 void power_supply_update_leds(struct power_supply *psy)
164 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
165 power_supply_update_bat_leds(psy);
167 power_supply_update_gen_leds(psy);
170 int power_supply_create_triggers(struct power_supply *psy)
172 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
173 return power_supply_create_bat_triggers(psy);
174 return power_supply_create_gen_triggers(psy);
177 void power_supply_remove_triggers(struct power_supply *psy)
179 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
180 power_supply_remove_bat_triggers(psy);
182 power_supply_remove_gen_triggers(psy);