1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * LED Triggers for USB Activity 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright 2014 Michal Sojka <sojka@merica.cz> 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #include <linux/module.h> 9*4882a593Smuzhiyun #include <linux/kernel.h> 10*4882a593Smuzhiyun #include <linux/init.h> 11*4882a593Smuzhiyun #include <linux/leds.h> 12*4882a593Smuzhiyun #include <linux/usb.h> 13*4882a593Smuzhiyun #include "common.h" 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #define BLINK_DELAY 30 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun static unsigned long usb_blink_delay = BLINK_DELAY; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun DEFINE_LED_TRIGGER(ledtrig_usb_gadget); 20*4882a593Smuzhiyun DEFINE_LED_TRIGGER(ledtrig_usb_host); 21*4882a593Smuzhiyun usb_led_activity(enum usb_led_event ev)22*4882a593Smuzhiyunvoid usb_led_activity(enum usb_led_event ev) 23*4882a593Smuzhiyun { 24*4882a593Smuzhiyun struct led_trigger *trig = NULL; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun switch (ev) { 27*4882a593Smuzhiyun case USB_LED_EVENT_GADGET: 28*4882a593Smuzhiyun trig = ledtrig_usb_gadget; 29*4882a593Smuzhiyun break; 30*4882a593Smuzhiyun case USB_LED_EVENT_HOST: 31*4882a593Smuzhiyun trig = ledtrig_usb_host; 32*4882a593Smuzhiyun break; 33*4882a593Smuzhiyun } 34*4882a593Smuzhiyun /* led_trigger_blink_oneshot() handles trig == NULL gracefully */ 35*4882a593Smuzhiyun led_trigger_blink_oneshot(trig, &usb_blink_delay, &usb_blink_delay, 0); 36*4882a593Smuzhiyun } 37*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(usb_led_activity); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun ledtrig_usb_init(void)40*4882a593Smuzhiyunvoid __init ledtrig_usb_init(void) 41*4882a593Smuzhiyun { 42*4882a593Smuzhiyun led_trigger_register_simple("usb-gadget", &ledtrig_usb_gadget); 43*4882a593Smuzhiyun led_trigger_register_simple("usb-host", &ledtrig_usb_host); 44*4882a593Smuzhiyun } 45*4882a593Smuzhiyun ledtrig_usb_exit(void)46*4882a593Smuzhiyunvoid __exit ledtrig_usb_exit(void) 47*4882a593Smuzhiyun { 48*4882a593Smuzhiyun led_trigger_unregister_simple(ledtrig_usb_gadget); 49*4882a593Smuzhiyun led_trigger_unregister_simple(ledtrig_usb_host); 50*4882a593Smuzhiyun } 51