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kernel/linux-rt-4.4.41/arch/powerpc/boot/cuboot-85xx.c 1.63 KB
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  /*
   * Old U-boot compatibility for 85xx
   *
   * Author: Scott Wood <scottwood@freescale.com>
   *
   * Copyright (c) 2007 Freescale Semiconductor, Inc.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   */
  
  #include "ops.h"
  #include "stdio.h"
  #include "cuboot.h"
  
  #define TARGET_85xx
  #define TARGET_HAS_ETH3
  #include "ppcboot.h"
  
  static bd_t bd;
  
  static void platform_fixups(void)
  {
  	void *soc;
  
  	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  	dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
  	dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr);
  	dt_fixup_mac_address_by_alias("ethernet2", bd.bi_enet2addr);
  	dt_fixup_mac_address_by_alias("ethernet3", bd.bi_enet3addr);
  	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 8, bd.bi_busfreq);
  
  	/* Unfortunately, the specific model number is encoded in the
  	 * soc node name in existing dts files -- once that is fixed,
  	 * this can do a simple path lookup.
  	 */
  	soc = find_node_by_devtype(NULL, "soc");
  	if (soc) {
  		void *serial = NULL;
  
  		setprop(soc, "bus-frequency", &bd.bi_busfreq,
  		        sizeof(bd.bi_busfreq));
  
  		while ((serial = find_node_by_devtype(serial, "serial"))) {
  			if (get_parent(serial) != soc)
  				continue;
  
  			setprop(serial, "clock-frequency", &bd.bi_busfreq,
  			        sizeof(bd.bi_busfreq));
  		}
  	}
  }
  
  void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
                     unsigned long r6, unsigned long r7)
  {
  	CUBOOT_INIT();
  	fdt_init(_dtb_start);
  	serial_console_init();
  	platform_ops.fixups = platform_fixups;
  }