67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
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* The President and Fellows of Harvard College.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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/*
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* Code for attaching the (generic) rtclock device to the LAMEbus ltimer.
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*
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* rtclock is a generic clock interface that gets its clock service from
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* an actual hardware clock of some kind. (Theoretically it could also
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* get its clock service from a clock maintained in software, as is the
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* case on most systems. However, no such driver has been written yet.)
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*
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* ltimer can provide this clock service.
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*/
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#include <types.h>
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#include <lib.h>
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#include <generic/rtclock.h>
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#include <lamebus/ltimer.h>
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#include "autoconf.h"
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struct rtclock_softc *
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attach_rtclock_to_ltimer(int rtclockno, struct ltimer_softc *ls)
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{
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/*
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* No need to probe; ltimer always has a clock.
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* Just allocate the rtclock, set our fields, and return it.
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*/
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struct rtclock_softc *rtc = kmalloc(sizeof(struct rtclock_softc));
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if (rtc==NULL) {
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/* Out of memory */
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return NULL;
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}
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(void)rtclockno; // unused
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rtc->rtc_devdata = ls;
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rtc->rtc_gettime = ltimer_gettime;
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return rtc;
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}
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