blob: 0865dd44a80ad1ee48e2a02c75752f6aa23bd02e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
// SPDX-License-Identifier: GPL-2.0
/*
* LED Triggers for USB Activity
*
* Copyright 2014 Michal Sojka <sojka@merica.cz>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/usb.h>
#include "common.h"
#define BLINK_DELAY 30
static unsigned long usb_blink_delay = BLINK_DELAY;
DEFINE_LED_TRIGGER(ledtrig_usb_gadget);
DEFINE_LED_TRIGGER(ledtrig_usb_host);
void usb_led_activity(enum usb_led_event ev)
{
struct led_trigger *trig = NULL;
switch (ev) {
case USB_LED_EVENT_GADGET:
trig = ledtrig_usb_gadget;
break;
case USB_LED_EVENT_HOST:
trig = ledtrig_usb_host;
break;
}
/* led_trigger_blink_oneshot() handles trig == NULL gracefully */
led_trigger_blink_oneshot(trig, &usb_blink_delay, &usb_blink_delay, 0);
}
EXPORT_SYMBOL_GPL(usb_led_activity);
void __init ledtrig_usb_init(void)
{
led_trigger_register_simple("usb-gadget", &ledtrig_usb_gadget);
led_trigger_register_simple("usb-host", &ledtrig_usb_host);
}
void __exit ledtrig_usb_exit(void)
{
led_trigger_unregister_simple(ledtrig_usb_gadget);
led_trigger_unregister_simple(ledtrig_usb_host);
}
|
