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4a11b59d AV |
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 | ||
4d24473c | 13 | #include <linux/kernel.h> |
4a11b59d AV |
14 | #include <linux/power_supply.h> |
15 | ||
25f12141 AB |
16 | #include "power_supply.h" |
17 | ||
4a11b59d AV |
18 | /* Battery specific LEDs triggers. */ |
19 | ||
20 | static void power_supply_update_bat_leds(struct power_supply *psy) | |
21 | { | |
22 | union power_supply_propval status; | |
23 | ||
24 | if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status)) | |
25 | return; | |
26 | ||
0cddc0a9 | 27 | dev_dbg(psy->dev, "%s %d\n", __func__, status.intval); |
4a11b59d AV |
28 | |
29 | switch (status.intval) { | |
30 | case POWER_SUPPLY_STATUS_FULL: | |
31 | led_trigger_event(psy->charging_full_trig, LED_FULL); | |
32 | led_trigger_event(psy->charging_trig, LED_OFF); | |
33 | led_trigger_event(psy->full_trig, LED_FULL); | |
34 | break; | |
35 | case POWER_SUPPLY_STATUS_CHARGING: | |
36 | led_trigger_event(psy->charging_full_trig, LED_FULL); | |
37 | led_trigger_event(psy->charging_trig, LED_FULL); | |
38 | led_trigger_event(psy->full_trig, LED_OFF); | |
39 | break; | |
40 | default: | |
41 | led_trigger_event(psy->charging_full_trig, LED_OFF); | |
42 | led_trigger_event(psy->charging_trig, LED_OFF); | |
43 | led_trigger_event(psy->full_trig, LED_OFF); | |
44 | break; | |
45 | } | |
4a11b59d AV |
46 | } |
47 | ||
48 | static int power_supply_create_bat_triggers(struct power_supply *psy) | |
49 | { | |
50 | int rc = 0; | |
51 | ||
4d24473c AM |
52 | psy->charging_full_trig_name = kasprintf(GFP_KERNEL, |
53 | "%s-charging-or-full", psy->name); | |
4a11b59d AV |
54 | if (!psy->charging_full_trig_name) |
55 | goto charging_full_failed; | |
56 | ||
4d24473c AM |
57 | psy->charging_trig_name = kasprintf(GFP_KERNEL, |
58 | "%s-charging", psy->name); | |
4a11b59d AV |
59 | if (!psy->charging_trig_name) |
60 | goto charging_failed; | |
61 | ||
4d24473c | 62 | psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name); |
4a11b59d AV |
63 | if (!psy->full_trig_name) |
64 | goto full_failed; | |
65 | ||
4a11b59d AV |
66 | led_trigger_register_simple(psy->charging_full_trig_name, |
67 | &psy->charging_full_trig); | |
68 | led_trigger_register_simple(psy->charging_trig_name, | |
69 | &psy->charging_trig); | |
70 | led_trigger_register_simple(psy->full_trig_name, | |
71 | &psy->full_trig); | |
72 | ||
73 | goto success; | |
74 | ||
75 | full_failed: | |
76 | kfree(psy->charging_trig_name); | |
77 | charging_failed: | |
78 | kfree(psy->charging_full_trig_name); | |
79 | charging_full_failed: | |
80 | rc = -ENOMEM; | |
81 | success: | |
82 | return rc; | |
83 | } | |
84 | ||
85 | static void power_supply_remove_bat_triggers(struct power_supply *psy) | |
86 | { | |
87 | led_trigger_unregister_simple(psy->charging_full_trig); | |
88 | led_trigger_unregister_simple(psy->charging_trig); | |
89 | led_trigger_unregister_simple(psy->full_trig); | |
90 | kfree(psy->full_trig_name); | |
91 | kfree(psy->charging_trig_name); | |
92 | kfree(psy->charging_full_trig_name); | |
4a11b59d AV |
93 | } |
94 | ||
95 | /* Generated power specific LEDs triggers. */ | |
96 | ||
97 | static void power_supply_update_gen_leds(struct power_supply *psy) | |
98 | { | |
99 | union power_supply_propval online; | |
100 | ||
101 | if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online)) | |
102 | return; | |
103 | ||
0cddc0a9 | 104 | dev_dbg(psy->dev, "%s %d\n", __func__, online.intval); |
4a11b59d AV |
105 | |
106 | if (online.intval) | |
107 | led_trigger_event(psy->online_trig, LED_FULL); | |
108 | else | |
109 | led_trigger_event(psy->online_trig, LED_OFF); | |
4a11b59d AV |
110 | } |
111 | ||
112 | static int power_supply_create_gen_triggers(struct power_supply *psy) | |
113 | { | |
114 | int rc = 0; | |
115 | ||
4d24473c | 116 | psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name); |
4a11b59d AV |
117 | if (!psy->online_trig_name) |
118 | goto online_failed; | |
119 | ||
4a11b59d AV |
120 | led_trigger_register_simple(psy->online_trig_name, &psy->online_trig); |
121 | ||
122 | goto success; | |
123 | ||
124 | online_failed: | |
125 | rc = -ENOMEM; | |
126 | success: | |
127 | return rc; | |
128 | } | |
129 | ||
130 | static void power_supply_remove_gen_triggers(struct power_supply *psy) | |
131 | { | |
132 | led_trigger_unregister_simple(psy->online_trig); | |
133 | kfree(psy->online_trig_name); | |
4a11b59d AV |
134 | } |
135 | ||
136 | /* Choice what triggers to create&update. */ | |
137 | ||
138 | void power_supply_update_leds(struct power_supply *psy) | |
139 | { | |
140 | if (psy->type == POWER_SUPPLY_TYPE_BATTERY) | |
141 | power_supply_update_bat_leds(psy); | |
142 | else | |
143 | power_supply_update_gen_leds(psy); | |
4a11b59d AV |
144 | } |
145 | ||
146 | int power_supply_create_triggers(struct power_supply *psy) | |
147 | { | |
148 | if (psy->type == POWER_SUPPLY_TYPE_BATTERY) | |
149 | return power_supply_create_bat_triggers(psy); | |
150 | return power_supply_create_gen_triggers(psy); | |
151 | } | |
152 | ||
153 | void power_supply_remove_triggers(struct power_supply *psy) | |
154 | { | |
155 | if (psy->type == POWER_SUPPLY_TYPE_BATTERY) | |
156 | power_supply_remove_bat_triggers(psy); | |
157 | else | |
158 | power_supply_remove_gen_triggers(psy); | |
4a11b59d | 159 | } |