59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/* $NetBSD: fdt_rtc.c,v 1.1 2017/04/22 13:24:20 jmcneill Exp $ */
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/*-
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* Copyright (c) 2017 Jared D. 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fdt_rtc.c,v 1.1 2017/04/22 13:24:20 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kmem.h>
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#include <libfdt.h>
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#include <dev/fdt/fdtvar.h>
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int
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fdtbus_todr_attach(device_t dev, int phandle, todr_chip_handle_t tch)
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{
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const char *prop;
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/*
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* The kernel will only use the first device to register with
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* todr_attach. If we have an "rtc0" alias, ensure that it matches
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* this phandle and ignore all other RTC devices.
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*/
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prop = fdt_get_alias(fdtbus_get_data(), "rtc0");
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if (prop != NULL && OF_finddevice(prop) != phandle) {
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device_printf(dev, "disabled\n");
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return EINVAL;
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}
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todr_attach(tch);
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return 0;
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}
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