52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/* $NetBSD: led.h,v 1.1 2017/07/08 00:54:37 jmcneill Exp $ */
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/*-
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* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _DEV_LED_H
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#define _DEV_LED_H
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enum {
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LED_STATE_OFF,
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LED_STATE_ON
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};
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typedef int (*led_getstate_fn)(void *);
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typedef void (*led_setstate_fn)(void *, int);
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/*
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* Attach an LED device. Returns an opaque handle on success and NULL
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* on failure.
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*/
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void * led_attach(const char *, void *, led_getstate_fn, led_setstate_fn);
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/*
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* Detach a previously attached LED device.
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*/
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void led_detach(void *);
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#endif /* !_DEV_LED_H */
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