fdt_powerpc.c revision 266079
1/*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Semihalf under sponsorship from 6 * the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: stable/10/sys/dev/fdt/fdt_powerpc.c 266079 2014-05-14 18:54:34Z ian $"); 32 33#include <sys/param.h> 34#include <sys/systm.h> 35#include <sys/kernel.h> 36#include <sys/module.h> 37#include <sys/bus.h> 38 39#include <machine/intr_machdep.h> 40 41#include <dev/ofw/ofw_bus.h> 42#include <dev/ofw/ofw_bus_subr.h> 43#include <dev/ofw/openfirm.h> 44 45#include "ofw_bus_if.h" 46#include "fdt_common.h" 47 48static void 49fdt_fixup_busfreq(phandle_t root) 50{ 51 phandle_t sb, cpus, child; 52 pcell_t freq; 53 54 /* 55 * Do a strict check so as to skip non-SOC nodes, which also claim 56 * simple-bus compatibility such as eLBC etc. 57 */ 58 if ((sb = fdt_find_compatible(root, "simple-bus", 1)) == 0) 59 return; 60 61 /* 62 * This fixup uses /cpus/ bus-frequency prop value to set simple-bus 63 * bus-frequency property. 64 */ 65 if ((cpus = OF_finddevice("/cpus")) == -1) 66 return; 67 68 if ((child = OF_child(cpus)) == 0) 69 return; 70 71 if (OF_getprop(child, "bus-frequency", (void *)&freq, 72 sizeof(freq)) <= 0) 73 return; 74 75 OF_setprop(sb, "bus-frequency", (void *)&freq, sizeof(freq)); 76} 77 78struct fdt_fixup_entry fdt_fixup_table[] = { 79 { "fsl,MPC8572DS", &fdt_fixup_busfreq }, 80 { "MPC8555CDS", &fdt_fixup_busfreq }, 81 { NULL, NULL } 82}; 83 84