1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * LEDs triggers for power supply class |
4 | * |
5 | * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> |
6 | * Copyright © 2004 Szabolcs Gyurko |
7 | * Copyright © 2003 Ian Molton <spyro@f2s.com> |
8 | * |
9 | * Modified: 2004, Oct Szabolcs Gyurko |
10 | */ |
11 | |
12 | #include <linux/kernel.h> |
13 | #include <linux/device.h> |
14 | #include <linux/power_supply.h> |
15 | #include <linux/slab.h> |
16 | #include <linux/leds.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 | |
26 | if (power_supply_get_property(psy, psp: POWER_SUPPLY_PROP_STATUS, val: &status)) |
27 | return; |
28 | |
29 | dev_dbg(&psy->dev, "%s %d\n" , __func__, status.intval); |
30 | |
31 | switch (status.intval) { |
32 | case POWER_SUPPLY_STATUS_FULL: |
33 | led_trigger_event(trigger: psy->charging_full_trig, event: LED_FULL); |
34 | led_trigger_event(trigger: psy->charging_trig, event: LED_OFF); |
35 | led_trigger_event(trigger: psy->full_trig, event: LED_FULL); |
36 | /* Going from blink to LED on requires a LED_OFF event to stop blink */ |
37 | led_trigger_event(trigger: psy->charging_blink_full_solid_trig, event: LED_OFF); |
38 | led_trigger_event(trigger: psy->charging_blink_full_solid_trig, event: LED_FULL); |
39 | break; |
40 | case POWER_SUPPLY_STATUS_CHARGING: |
41 | led_trigger_event(trigger: psy->charging_full_trig, event: LED_FULL); |
42 | led_trigger_event(trigger: psy->charging_trig, event: LED_FULL); |
43 | led_trigger_event(trigger: psy->full_trig, event: LED_OFF); |
44 | led_trigger_blink(trigger: psy->charging_blink_full_solid_trig, delay_on: 0, delay_off: 0); |
45 | break; |
46 | default: |
47 | led_trigger_event(trigger: psy->charging_full_trig, event: LED_OFF); |
48 | led_trigger_event(trigger: psy->charging_trig, event: LED_OFF); |
49 | led_trigger_event(trigger: psy->full_trig, event: LED_OFF); |
50 | led_trigger_event(trigger: psy->charging_blink_full_solid_trig, |
51 | event: LED_OFF); |
52 | break; |
53 | } |
54 | } |
55 | |
56 | static int power_supply_create_bat_triggers(struct power_supply *psy) |
57 | { |
58 | psy->charging_full_trig_name = kasprintf(GFP_KERNEL, |
59 | fmt: "%s-charging-or-full" , psy->desc->name); |
60 | if (!psy->charging_full_trig_name) |
61 | goto charging_full_failed; |
62 | |
63 | psy->charging_trig_name = kasprintf(GFP_KERNEL, |
64 | fmt: "%s-charging" , psy->desc->name); |
65 | if (!psy->charging_trig_name) |
66 | goto charging_failed; |
67 | |
68 | psy->full_trig_name = kasprintf(GFP_KERNEL, fmt: "%s-full" , psy->desc->name); |
69 | if (!psy->full_trig_name) |
70 | goto full_failed; |
71 | |
72 | psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL, |
73 | fmt: "%s-charging-blink-full-solid" , psy->desc->name); |
74 | if (!psy->charging_blink_full_solid_trig_name) |
75 | goto charging_blink_full_solid_failed; |
76 | |
77 | led_trigger_register_simple(name: psy->charging_full_trig_name, |
78 | trigger: &psy->charging_full_trig); |
79 | led_trigger_register_simple(name: psy->charging_trig_name, |
80 | trigger: &psy->charging_trig); |
81 | led_trigger_register_simple(name: psy->full_trig_name, |
82 | trigger: &psy->full_trig); |
83 | led_trigger_register_simple(name: psy->charging_blink_full_solid_trig_name, |
84 | trigger: &psy->charging_blink_full_solid_trig); |
85 | |
86 | return 0; |
87 | |
88 | charging_blink_full_solid_failed: |
89 | kfree(objp: psy->full_trig_name); |
90 | full_failed: |
91 | kfree(objp: psy->charging_trig_name); |
92 | charging_failed: |
93 | kfree(objp: psy->charging_full_trig_name); |
94 | charging_full_failed: |
95 | return -ENOMEM; |
96 | } |
97 | |
98 | static void power_supply_remove_bat_triggers(struct power_supply *psy) |
99 | { |
100 | led_trigger_unregister_simple(trigger: psy->charging_full_trig); |
101 | led_trigger_unregister_simple(trigger: psy->charging_trig); |
102 | led_trigger_unregister_simple(trigger: psy->full_trig); |
103 | led_trigger_unregister_simple(trigger: psy->charging_blink_full_solid_trig); |
104 | kfree(objp: psy->charging_blink_full_solid_trig_name); |
105 | kfree(objp: psy->full_trig_name); |
106 | kfree(objp: psy->charging_trig_name); |
107 | kfree(objp: psy->charging_full_trig_name); |
108 | } |
109 | |
110 | /* Generated power specific LEDs triggers. */ |
111 | |
112 | static void power_supply_update_gen_leds(struct power_supply *psy) |
113 | { |
114 | union power_supply_propval online; |
115 | |
116 | if (power_supply_get_property(psy, psp: POWER_SUPPLY_PROP_ONLINE, val: &online)) |
117 | return; |
118 | |
119 | dev_dbg(&psy->dev, "%s %d\n" , __func__, online.intval); |
120 | |
121 | if (online.intval) |
122 | led_trigger_event(trigger: psy->online_trig, event: LED_FULL); |
123 | else |
124 | led_trigger_event(trigger: psy->online_trig, event: LED_OFF); |
125 | } |
126 | |
127 | static int power_supply_create_gen_triggers(struct power_supply *psy) |
128 | { |
129 | psy->online_trig_name = kasprintf(GFP_KERNEL, fmt: "%s-online" , |
130 | psy->desc->name); |
131 | if (!psy->online_trig_name) |
132 | return -ENOMEM; |
133 | |
134 | led_trigger_register_simple(name: psy->online_trig_name, trigger: &psy->online_trig); |
135 | |
136 | return 0; |
137 | } |
138 | |
139 | static void power_supply_remove_gen_triggers(struct power_supply *psy) |
140 | { |
141 | led_trigger_unregister_simple(trigger: psy->online_trig); |
142 | kfree(objp: psy->online_trig_name); |
143 | } |
144 | |
145 | /* Choice what triggers to create&update. */ |
146 | |
147 | void power_supply_update_leds(struct power_supply *psy) |
148 | { |
149 | if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY) |
150 | power_supply_update_bat_leds(psy); |
151 | else |
152 | power_supply_update_gen_leds(psy); |
153 | } |
154 | |
155 | int power_supply_create_triggers(struct power_supply *psy) |
156 | { |
157 | if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY) |
158 | return power_supply_create_bat_triggers(psy); |
159 | return power_supply_create_gen_triggers(psy); |
160 | } |
161 | |
162 | void power_supply_remove_triggers(struct power_supply *psy) |
163 | { |
164 | if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY) |
165 | power_supply_remove_bat_triggers(psy); |
166 | else |
167 | power_supply_remove_gen_triggers(psy); |
168 | } |
169 | |