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/arch/powerpc/boot/cuboot-52xx.c

https://github.com/aicjofs/android_kernel_lge_v500_20d
C | 63 lines | 38 code | 9 blank | 16 comment | 4 complexity | e5f0d3361c48200edafaf527f21fe435 MD5 | raw file
 1/*
 2 * Old U-boot compatibility for MPC5200
 3 *
 4 * Author: Grant Likely <grant.likely@secretlab.ca>
 5 *
 6 * Copyright (c) 2007 Secret Lab Technologies Ltd.
 7 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 8 *
 9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
12 */
13
14#include "ops.h"
15#include "stdio.h"
16#include "io.h"
17#include "cuboot.h"
18
19#define TARGET_PPC_MPC52xx
20#include "ppcboot.h"
21
22static bd_t bd;
23
24static void platform_fixups(void)
25{
26	void *soc, *reg;
27	int div;
28	u32 sysfreq;
29
30
31	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
32	dt_fixup_mac_addresses(bd.bi_enetaddr);
33	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
34
35	/* Unfortunately, the specific model number is encoded in the
36	 * soc node name in existing dts files -- once that is fixed,
37	 * this can do a simple path lookup.
38	 */
39	soc = find_node_by_devtype(NULL, "soc");
40	if (!soc)
41		soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
42	if (!soc)
43		soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
44	if (soc) {
45		setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
46			sizeof(bd.bi_ipbfreq));
47
48		if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
49			return;
50		div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
51		sysfreq = bd.bi_busfreq * div;
52		setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
53	}
54}
55
56void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
57                   unsigned long r6, unsigned long r7)
58{
59	CUBOOT_INIT();
60	fdt_init(_dtb_start);
61	serial_console_init();
62	platform_ops.fixups = platform_fixups;
63}