51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
|
// 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);
|
||
|
|
}
|