drm/i915: SDVO hotplug have different interrupt status bits for i915/i965/g4x
[linux-2.6.git] / drivers / power / power_supply_leds.c
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
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
58 static int power_supply_create_bat_triggers(struct power_supply *psy)
59 {
60         int rc = 0;
61
62         psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
63                                         "%s-charging-or-full", psy->name);
64         if (!psy->charging_full_trig_name)
65                 goto charging_full_failed;
66
67         psy->charging_trig_name = kasprintf(GFP_KERNEL,
68                                         "%s-charging", psy->name);
69         if (!psy->charging_trig_name)
70                 goto charging_failed;
71
72         psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
73         if (!psy->full_trig_name)
74                 goto full_failed;
75
76         psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
77                 "%s-charging-blink-full-solid", psy->name);
78         if (!psy->charging_blink_full_solid_trig_name)
79                 goto charging_blink_full_solid_failed;
80
81         led_trigger_register_simple(psy->charging_full_trig_name,
82                                     &psy->charging_full_trig);
83         led_trigger_register_simple(psy->charging_trig_name,
84                                     &psy->charging_trig);
85         led_trigger_register_simple(psy->full_trig_name,
86                                     &psy->full_trig);
87         led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
88                                     &psy->charging_blink_full_solid_trig);
89
90         goto success;
91
92 charging_blink_full_solid_failed:
93         kfree(psy->full_trig_name);
94 full_failed:
95         kfree(psy->charging_trig_name);
96 charging_failed:
97         kfree(psy->charging_full_trig_name);
98 charging_full_failed:
99         rc = -ENOMEM;
100 success:
101         return rc;
102 }
103
104 static void power_supply_remove_bat_triggers(struct power_supply *psy)
105 {
106         led_trigger_unregister_simple(psy->charging_full_trig);
107         led_trigger_unregister_simple(psy->charging_trig);
108         led_trigger_unregister_simple(psy->full_trig);
109         led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
110         kfree(psy->charging_blink_full_solid_trig_name);
111         kfree(psy->full_trig_name);
112         kfree(psy->charging_trig_name);
113         kfree(psy->charging_full_trig_name);
114 }
115
116 /* Generated power specific LEDs triggers. */
117
118 static void power_supply_update_gen_leds(struct power_supply *psy)
119 {
120         union power_supply_propval online;
121
122         if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
123                 return;
124
125         dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);
126
127         if (online.intval)
128                 led_trigger_event(psy->online_trig, LED_FULL);
129         else
130                 led_trigger_event(psy->online_trig, LED_OFF);
131 }
132
133 static int power_supply_create_gen_triggers(struct power_supply *psy)
134 {
135         int rc = 0;
136
137         psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
138         if (!psy->online_trig_name)
139                 goto online_failed;
140
141         led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
142
143         goto success;
144
145 online_failed:
146         rc = -ENOMEM;
147 success:
148         return rc;
149 }
150
151 static void power_supply_remove_gen_triggers(struct power_supply *psy)
152 {
153         led_trigger_unregister_simple(psy->online_trig);
154         kfree(psy->online_trig_name);
155 }
156
157 /* Choice what triggers to create&update. */
158
159 void power_supply_update_leds(struct power_supply *psy)
160 {
161         if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
162                 power_supply_update_bat_leds(psy);
163         else
164                 power_supply_update_gen_leds(psy);
165 }
166
167 int power_supply_create_triggers(struct power_supply *psy)
168 {
169         if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
170                 return power_supply_create_bat_triggers(psy);
171         return power_supply_create_gen_triggers(psy);
172 }
173
174 void power_supply_remove_triggers(struct power_supply *psy)
175 {
176         if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
177                 power_supply_remove_bat_triggers(psy);
178         else
179                 power_supply_remove_gen_triggers(psy);
180 }