61 lines
2.6 KiB
C
61 lines
2.6 KiB
C
/* $OpenBSD: clock_subr.h,v 1.8 2022/10/12 13:39:50 kettenis Exp $ */
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/* $NetBSD: clock_subr.h,v 1.2 1997/03/15 18:11:17 is Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Interface to time-of-day clock devices.
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*
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* todr_gettime: convert time-of-day clock into a `struct timeval'
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* todr_settime: set time-of-day clock from a `struct timeval'
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*
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* (this is probably not so useful:)
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* todr_setwen: provide a machine-dependent TOD clock write-enable callback
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* function which takes one boolean argument:
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* 1 to enable writes; 0 to disable writes.
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*/
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struct todr_chip_handle {
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void *cookie; /* Device specific data */
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void *bus_cookie; /* Bus specific data */
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int todr_quality;
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int (*todr_gettime)(struct todr_chip_handle *, struct timeval *);
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int (*todr_settime)(struct todr_chip_handle *, struct timeval *);
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int (*todr_setwen)(struct todr_chip_handle *, int);
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};
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typedef struct todr_chip_handle *todr_chip_handle_t;
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#define todr_gettime(ct, t) ((*(ct)->todr_gettime)(ct, t))
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#define todr_settime(ct, t) ((*(ct)->todr_settime)(ct, t))
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#define todr_wenable(ct, v) if ((ct)->todr_setwen) \
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((*(ct)->todr_setwen)(ct, v))
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void todr_attach(struct todr_chip_handle *);
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