tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
22static 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
58static 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
92charging_blink_full_solid_failed:
93 kfree(psy->full_trig_name);
94full_failed:
95 kfree(psy->charging_trig_name);
96charging_failed:
97 kfree(psy->charging_full_trig_name);
98charging_full_failed:
99 rc = -ENOMEM;
100success:
101 return rc;
102}
103
104static 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
118static 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
133static 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
145online_failed:
146 rc = -ENOMEM;
147success:
148 return rc;
149}
150
151static 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
159void 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
167int 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
174void 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}