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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Old U-boot compatibility for MPC5200
   4 *
   5 * Author: Grant Likely <grant.likely@secretlab.ca>
   6 *
   7 * Copyright (c) 2007 Secret Lab Technologies Ltd.
   8 * Copyright (c) 2007 Freescale Semiconductor, Inc.
   9 */
  10
  11#include "ops.h"
  12#include "stdio.h"
  13#include "io.h"
  14#include "cuboot.h"
  15
  16#define TARGET_PPC_MPC52xx
  17#include "ppcboot.h"
  18
  19static bd_t bd;
  20
  21static void platform_fixups(void)
  22{
  23        void *soc, *reg;
  24        int div;
  25        u32 sysfreq;
  26
  27
  28        dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  29        dt_fixup_mac_addresses(bd.bi_enetaddr);
  30        dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
  31
  32        /* Unfortunately, the specific model number is encoded in the
  33         * soc node name in existing dts files -- once that is fixed,
  34         * this can do a simple path lookup.
  35         */
  36        soc = find_node_by_devtype(NULL, "soc");
  37        if (!soc)
  38                soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
  39        if (!soc)
  40                soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
  41        if (soc) {
  42                setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
  43                        sizeof(bd.bi_ipbfreq));
  44
  45                if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
  46                        return;
  47                div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
  48                sysfreq = bd.bi_busfreq * div;
  49                setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
  50        }
  51}
  52
  53void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  54                   unsigned long r6, unsigned long r7)
  55{
  56        CUBOOT_INIT();
  57        fdt_init(_dtb_start);
  58        serial_console_init();
  59        platform_ops.fixups = platform_fixups;
  60}
  61