2 * devtree.c - convenience functions for device tree manipulation
3 * Copyright 2007 David Gibson, IBM Corporation.
4 * Copyright (c) 2007 Freescale Semiconductor, Inc.
6 * Authors: David Gibson <david@gibson.dropbear.id.au>
7 * Scott Wood <scottwood@freescale.com>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
21 void dt_fixup_memory(u64 start, u64 size)
27 root = finddevice("/");
28 if (getprop(root, "#address-cells", &naddr, sizeof(naddr)) < 0)
30 if (naddr < 1 || naddr > 2)
31 fatal("Can't cope with #address-cells == %d in /\n\r", naddr);
33 if (getprop(root, "#size-cells", &nsize, sizeof(nsize)) < 0)
35 if (nsize < 1 || nsize > 2)
36 fatal("Can't cope with #size-cells == %d in /\n\r", nsize);
40 memreg[i++] = start >> 32;
41 memreg[i++] = start & 0xffffffff;
43 memreg[i++] = size >> 32;
44 memreg[i++] = size & 0xffffffff;
46 memory = finddevice("/memory");
48 memory = create_node(NULL, "memory");
49 setprop_str(memory, "device_type", "memory");
52 printf("Memory <- <0x%x", memreg[0]);
53 for (i = 1; i < (naddr + nsize); i++)
54 printf(" 0x%x", memreg[i]);
55 printf("> (%ldMB)\n\r", (unsigned long)(size >> 20));
57 setprop(memory, "reg", memreg, (naddr + nsize)*sizeof(u32));
60 #define MHZ(x) ((x + 500000) / 1000000)
62 void dt_fixup_cpu_clocks(u32 cpu, u32 tb, u32 bus)
66 printf("CPU clock-frequency <- 0x%x (%dMHz)\n\r", cpu, MHZ(cpu));
67 printf("CPU timebase-frequency <- 0x%x (%dMHz)\n\r", tb, MHZ(tb));
69 printf("CPU bus-frequency <- 0x%x (%dMHz)\n\r", bus, MHZ(bus));
71 while ((devp = find_node_by_devtype(devp, "cpu"))) {
72 setprop_val(devp, "clock-frequency", cpu);
73 setprop_val(devp, "timebase-frequency", tb);
75 setprop_val(devp, "bus-frequency", bus);
79 void dt_fixup_clock(const char *path, u32 freq)
81 void *devp = finddevice(path);
84 printf("%s: clock-frequency <- %x (%dMHz)\n\r", path, freq, MHZ(freq));
85 setprop_val(devp, "clock-frequency", freq);
89 void __dt_fixup_mac_addresses(u32 startindex, ...)
92 u32 index = startindex;
96 va_start(ap, startindex);
97 while ((addr = va_arg(ap, const u8 *))) {
98 devp = find_node_by_prop_value(NULL, "linux,network-index",
99 (void*)&index, sizeof(index));
101 printf("ENET%d: local-mac-address <-"
102 " %02x:%02x:%02x:%02x:%02x:%02x\n\r", index,
103 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
106 setprop(devp, "local-mac-address", addr, 6);