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/* $OpenBSD: clock_subr.h,v 1.8 2022/10/12 13:39:50 kettenis Exp $ */
/* $NetBSD: clock_subr.h,v 1.2 1997/03/15 18:11:17 is Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gordon W. Ross
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Interface to time-of-day clock devices.
*
* todr_gettime: convert time-of-day clock into a `struct timeval'
* todr_settime: set time-of-day clock from a `struct timeval'
*
* (this is probably not so useful:)
* todr_setwen: provide a machine-dependent TOD clock write-enable callback
* function which takes one boolean argument:
* 1 to enable writes; 0 to disable writes.
*/
struct todr_chip_handle {
void *cookie; /* Device specific data */
void *bus_cookie; /* Bus specific data */
int todr_quality;
int (*todr_gettime)(struct todr_chip_handle *, struct timeval *);
int (*todr_settime)(struct todr_chip_handle *, struct timeval *);
int (*todr_setwen)(struct todr_chip_handle *, int);
};
typedef struct todr_chip_handle *todr_chip_handle_t;
#define todr_gettime(ct, t) ((*(ct)->todr_gettime)(ct, t))
#define todr_settime(ct, t) ((*(ct)->todr_settime)(ct, t))
#define todr_wenable(ct, v) if ((ct)->todr_setwen) \
((*(ct)->todr_setwen)(ct, v))
void todr_attach(struct todr_chip_handle *);
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