1 /*
2 * LEDs triggers for power supply class
3 *
4 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
5 * Copyright © 2004 Szabolcs Gyurko
6 * Copyright © 2003 Ian Molton <spyro@f2s.com>
7 *
8 * Modified: 2004, Oct Szabolcs Gyurko
9 *
10 * You may use this code as per GPL version 2
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/device.h>
15 #include <linux/power_supply.h>
16 #include <linux/slab.h>
17
18 #include "power_supply.h"
19
20 /* Battery specific LEDs triggers. */
21
power_supply_update_bat_leds(struct power_supply * psy)22 static void power_supply_update_bat_leds(struct power_supply *psy)
23 {
24 union power_supply_propval status;
25 unsigned long delay_on = 0;
26 unsigned long delay_off = 0;
27
28 if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
29 return;
30
31 dev_dbg(psy->dev, "%s %d\n", __func__, status.intval);
32
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 led_trigger_event(psy->charging_blink_full_solid_trig,
39 LED_FULL);
40 break;
41 case POWER_SUPPLY_STATUS_CHARGING:
42 led_trigger_event(psy->charging_full_trig, LED_FULL);
43 led_trigger_event(psy->charging_trig, LED_FULL);
44 led_trigger_event(psy->full_trig, LED_OFF);
45 led_trigger_blink(psy->charging_blink_full_solid_trig,
46 &delay_on, &delay_off);
47 break;
48 default:
49 led_trigger_event(psy->charging_full_trig, LED_OFF);
50 led_trigger_event(psy->charging_trig, LED_OFF);
51 led_trigger_event(psy->full_trig, LED_OFF);
52 led_trigger_event(psy->charging_blink_full_solid_trig,
53 LED_OFF);
54 break;
55 }
56 }
57
power_supply_create_bat_triggers(struct power_supply * psy)58 static int power_supply_create_bat_triggers(struct power_supply *psy)
59 {
60 psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
61 "%s-charging-or-full", psy->name);
62 if (!psy->charging_full_trig_name)
63 goto charging_full_failed;
64
65 psy->charging_trig_name = kasprintf(GFP_KERNEL,
66 "%s-charging", psy->name);
67 if (!psy->charging_trig_name)
68 goto charging_failed;
69
70 psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
71 if (!psy->full_trig_name)
72 goto full_failed;
73
74 psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
75 "%s-charging-blink-full-solid", psy->name);
76 if (!psy->charging_blink_full_solid_trig_name)
77 goto charging_blink_full_solid_failed;
78
79 led_trigger_register_simple(psy->charging_full_trig_name,
80 &psy->charging_full_trig);
81 led_trigger_register_simple(psy->charging_trig_name,
82 &psy->charging_trig);
83 led_trigger_register_simple(psy->full_trig_name,
84 &psy->full_trig);
85 led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
86 &psy->charging_blink_full_solid_trig);
87
88 return 0;
89
90 charging_blink_full_solid_failed:
91 kfree(psy->full_trig_name);
92 full_failed:
93 kfree(psy->charging_trig_name);
94 charging_failed:
95 kfree(psy->charging_full_trig_name);
96 charging_full_failed:
97 return -ENOMEM;
98 }
99
power_supply_remove_bat_triggers(struct power_supply * psy)100 static void power_supply_remove_bat_triggers(struct power_supply *psy)
101 {
102 led_trigger_unregister_simple(psy->charging_full_trig);
103 led_trigger_unregister_simple(psy->charging_trig);
104 led_trigger_unregister_simple(psy->full_trig);
105 led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
106 kfree(psy->charging_blink_full_solid_trig_name);
107 kfree(psy->full_trig_name);
108 kfree(psy->charging_trig_name);
109 kfree(psy->charging_full_trig_name);
110 }
111
112 /* Generated power specific LEDs triggers. */
113
power_supply_update_gen_leds(struct power_supply * psy)114 static void power_supply_update_gen_leds(struct power_supply *psy)
115 {
116 union power_supply_propval online;
117
118 if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
119 return;
120
121 dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);
122
123 if (online.intval)
124 led_trigger_event(psy->online_trig, LED_FULL);
125 else
126 led_trigger_event(psy->online_trig, LED_OFF);
127 }
128
power_supply_create_gen_triggers(struct power_supply * psy)129 static int power_supply_create_gen_triggers(struct power_supply *psy)
130 {
131 psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
132 if (!psy->online_trig_name)
133 return -ENOMEM;
134
135 led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
136
137 return 0;
138 }
139
power_supply_remove_gen_triggers(struct power_supply * psy)140 static void power_supply_remove_gen_triggers(struct power_supply *psy)
141 {
142 led_trigger_unregister_simple(psy->online_trig);
143 kfree(psy->online_trig_name);
144 }
145
146 /* Choice what triggers to create&update. */
147
power_supply_update_leds(struct power_supply * psy)148 void power_supply_update_leds(struct power_supply *psy)
149 {
150 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
151 power_supply_update_bat_leds(psy);
152 else
153 power_supply_update_gen_leds(psy);
154 }
155
power_supply_create_triggers(struct power_supply * psy)156 int power_supply_create_triggers(struct power_supply *psy)
157 {
158 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
159 return power_supply_create_bat_triggers(psy);
160 return power_supply_create_gen_triggers(psy);
161 }
162
power_supply_remove_triggers(struct power_supply * psy)163 void power_supply_remove_triggers(struct power_supply *psy)
164 {
165 if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
166 power_supply_remove_bat_triggers(psy);
167 else
168 power_supply_remove_gen_triggers(psy);
169 }
170