Home | History | Annotate | Line # | Download | only in fdt
fdt_rtc.c revision 1.1.2.2 
      1  1.1.2.2  pgoyette /* $NetBSD: fdt_rtc.c,v 1.1.2.2 2017/04/26 02:53:11 pgoyette Exp $ */
      2  1.1.2.2  pgoyette 
      3  1.1.2.2  pgoyette /*-
      4  1.1.2.2  pgoyette  * Copyright (c) 2017 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  1.1.2.2  pgoyette  * All rights reserved.
      6  1.1.2.2  pgoyette  *
      7  1.1.2.2  pgoyette  * Redistribution and use in source and binary forms, with or without
      8  1.1.2.2  pgoyette  * modification, are permitted provided that the following conditions
      9  1.1.2.2  pgoyette  * are met:
     10  1.1.2.2  pgoyette  * 1. Redistributions of source code must retain the above copyright
     11  1.1.2.2  pgoyette  *    notice, this list of conditions and the following disclaimer.
     12  1.1.2.2  pgoyette  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1.2.2  pgoyette  *    notice, this list of conditions and the following disclaimer in the
     14  1.1.2.2  pgoyette  *    documentation and/or other materials provided with the distribution.
     15  1.1.2.2  pgoyette  *
     16  1.1.2.2  pgoyette  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.1.2.2  pgoyette  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.1.2.2  pgoyette  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.1.2.2  pgoyette  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.1.2.2  pgoyette  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  1.1.2.2  pgoyette  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  1.1.2.2  pgoyette  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  1.1.2.2  pgoyette  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  1.1.2.2  pgoyette  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.1.2.2  pgoyette  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.1.2.2  pgoyette  * SUCH DAMAGE.
     27  1.1.2.2  pgoyette  */
     28  1.1.2.2  pgoyette 
     29  1.1.2.2  pgoyette #include <sys/cdefs.h>
     30  1.1.2.2  pgoyette __KERNEL_RCSID(0, "$NetBSD: fdt_rtc.c,v 1.1.2.2 2017/04/26 02:53:11 pgoyette Exp $");
     31  1.1.2.2  pgoyette 
     32  1.1.2.2  pgoyette #include <sys/param.h>
     33  1.1.2.2  pgoyette #include <sys/bus.h>
     34  1.1.2.2  pgoyette #include <sys/kmem.h>
     35  1.1.2.2  pgoyette 
     36  1.1.2.2  pgoyette #include <libfdt.h>
     37  1.1.2.2  pgoyette #include <dev/fdt/fdtvar.h>
     38  1.1.2.2  pgoyette 
     39  1.1.2.2  pgoyette int
     40  1.1.2.2  pgoyette fdtbus_todr_attach(device_t dev, int phandle, todr_chip_handle_t tch)
     41  1.1.2.2  pgoyette {
     42  1.1.2.2  pgoyette 	const char *prop;
     43  1.1.2.2  pgoyette 
     44  1.1.2.2  pgoyette 	/*
     45  1.1.2.2  pgoyette 	 * The kernel will only use the first device to register with
     46  1.1.2.2  pgoyette 	 * todr_attach. If we have an "rtc0" alias, ensure that it matches
     47  1.1.2.2  pgoyette 	 * this phandle and ignore all other RTC devices.
     48  1.1.2.2  pgoyette 	 */
     49  1.1.2.2  pgoyette 	prop = fdt_get_alias(fdtbus_get_data(), "rtc0");
     50  1.1.2.2  pgoyette 	if (prop != NULL && OF_finddevice(prop) != phandle) {
     51  1.1.2.2  pgoyette 		device_printf(dev, "disabled\n");
     52  1.1.2.2  pgoyette 		return EINVAL;
     53  1.1.2.2  pgoyette 	}
     54  1.1.2.2  pgoyette 
     55  1.1.2.2  pgoyette 	todr_attach(tch);
     56  1.1.2.2  pgoyette 
     57  1.1.2.2  pgoyette 	return 0;
     58  1.1.2.2  pgoyette }
     59