fdt_rtc.c revision 1.1.10.2
1 1.1.10.2 skrll /* $NetBSD: fdt_rtc.c,v 1.1.10.2 2017/08/28 17:52:02 skrll Exp $ */ 2 1.1.10.2 skrll 3 1.1.10.2 skrll /*- 4 1.1.10.2 skrll * Copyright (c) 2017 Jared D. McNeill <jmcneill (at) invisible.ca> 5 1.1.10.2 skrll * All rights reserved. 6 1.1.10.2 skrll * 7 1.1.10.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.1.10.2 skrll * modification, are permitted provided that the following conditions 9 1.1.10.2 skrll * are met: 10 1.1.10.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.1.10.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.1.10.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.10.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.1.10.2 skrll * documentation and/or other materials provided with the distribution. 15 1.1.10.2 skrll * 16 1.1.10.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.10.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.10.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.10.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1.10.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.1.10.2 skrll * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.1.10.2 skrll * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.1.10.2 skrll * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.1.10.2 skrll * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.10.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.10.2 skrll * SUCH DAMAGE. 27 1.1.10.2 skrll */ 28 1.1.10.2 skrll 29 1.1.10.2 skrll #include <sys/cdefs.h> 30 1.1.10.2 skrll __KERNEL_RCSID(0, "$NetBSD: fdt_rtc.c,v 1.1.10.2 2017/08/28 17:52:02 skrll Exp $"); 31 1.1.10.2 skrll 32 1.1.10.2 skrll #include <sys/param.h> 33 1.1.10.2 skrll #include <sys/bus.h> 34 1.1.10.2 skrll #include <sys/kmem.h> 35 1.1.10.2 skrll 36 1.1.10.2 skrll #include <libfdt.h> 37 1.1.10.2 skrll #include <dev/fdt/fdtvar.h> 38 1.1.10.2 skrll 39 1.1.10.2 skrll int 40 1.1.10.2 skrll fdtbus_todr_attach(device_t dev, int phandle, todr_chip_handle_t tch) 41 1.1.10.2 skrll { 42 1.1.10.2 skrll const char *prop; 43 1.1.10.2 skrll 44 1.1.10.2 skrll /* 45 1.1.10.2 skrll * The kernel will only use the first device to register with 46 1.1.10.2 skrll * todr_attach. If we have an "rtc0" alias, ensure that it matches 47 1.1.10.2 skrll * this phandle and ignore all other RTC devices. 48 1.1.10.2 skrll */ 49 1.1.10.2 skrll prop = fdt_get_alias(fdtbus_get_data(), "rtc0"); 50 1.1.10.2 skrll if (prop != NULL && OF_finddevice(prop) != phandle) { 51 1.1.10.2 skrll device_printf(dev, "disabled\n"); 52 1.1.10.2 skrll return EINVAL; 53 1.1.10.2 skrll } 54 1.1.10.2 skrll 55 1.1.10.2 skrll todr_attach(tch); 56 1.1.10.2 skrll 57 1.1.10.2 skrll return 0; 58 1.1.10.2 skrll } 59
Indexes created Thu Oct 02 01:09:59 GMT 2025