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/device.h>
15 #include <linux/power_supply.h>
16 #include <linux/slab.h>
18 #include "power_supply.h"
20 /* Battery specific LEDs triggers. */
22 static void power_supply_update_bat_leds(struct power_supply *psy)
24 union power_supply_propval status;
25 unsigned long delay_on = 0;
26 unsigned long delay_off = 0;
28 if (power_supply_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 led_trigger_event(psy->charging_full_trig, LED_FULL);
36 led_trigger_event(psy->charging_trig, LED_OFF);
37 led_trigger_event(psy->full_trig, LED_FULL);
38 /* Going from blink to LED on requires a LED_OFF event to stop blink */
39 led_trigger_event(psy->charging_blink_full_solid_trig, LED_OFF);
40 led_trigger_event(psy->charging_blink_full_solid_trig, LED_FULL);
42 case POWER_SUPPLY_STATUS_CHARGING:
43 led_trigger_event(psy->charging_full_trig, LED_FULL);
44 led_trigger_event(psy->charging_trig, LED_FULL);
45 led_trigger_event(psy->full_trig, LED_OFF);
46 led_trigger_blink(psy->charging_blink_full_solid_trig,
47 &delay_on, &delay_off);
50 led_trigger_event(psy->charging_full_trig, LED_OFF);
51 led_trigger_event(psy->charging_trig, LED_OFF);
52 led_trigger_event(psy->full_trig, LED_OFF);
53 led_trigger_event(psy->charging_blink_full_solid_trig,
59 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->desc->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->desc->name);
68 if (!psy->charging_trig_name)
71 psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->desc->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->desc->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);
101 static void power_supply_remove_bat_triggers(struct power_supply *psy)
103 led_trigger_unregister_simple(psy->charging_full_trig);
104 led_trigger_unregister_simple(psy->charging_trig);
105 led_trigger_unregister_simple(psy->full_trig);
106 led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
107 kfree(psy->charging_blink_full_solid_trig_name);
108 kfree(psy->full_trig_name);
109 kfree(psy->charging_trig_name);
110 kfree(psy->charging_full_trig_name);
113 /* Generated power specific LEDs triggers. */
115 static void power_supply_update_gen_leds(struct power_supply *psy)
117 union power_supply_propval online;
119 if (power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
122 dev_dbg(&psy->dev, "%s %d\n", __func__, online.intval);
125 led_trigger_event(psy->online_trig, LED_FULL);
127 led_trigger_event(psy->online_trig, LED_OFF);
130 static int power_supply_create_gen_triggers(struct power_supply *psy)
132 psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online",
134 if (!psy->online_trig_name)
137 led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
142 static void power_supply_remove_gen_triggers(struct power_supply *psy)
144 led_trigger_unregister_simple(psy->online_trig);
145 kfree(psy->online_trig_name);
148 /* Choice what triggers to create&update. */
150 void power_supply_update_leds(struct power_supply *psy)
152 if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
153 power_supply_update_bat_leds(psy);
155 power_supply_update_gen_leds(psy);
158 int power_supply_create_triggers(struct power_supply *psy)
160 if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
161 return power_supply_create_bat_triggers(psy);
162 return power_supply_create_gen_triggers(psy);
165 void power_supply_remove_triggers(struct power_supply *psy)
167 if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
168 power_supply_remove_bat_triggers(psy);
170 power_supply_remove_gen_triggers(psy);