cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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led.c (1145B)

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