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kernel/linux-rt-4.4.41/arch/mips/netlogic/xlp/dt.c 3.11 KB
5113f6f70   김현기   kernel add
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  /*
   * Copyright 2003-2013 Broadcom Corporation.
   * All Rights Reserved.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the Broadcom
   * license below:
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <linux/kernel.h>
  #include <linux/bootmem.h>
  
  #include <linux/of_fdt.h>
  #include <linux/of_platform.h>
  #include <linux/of_device.h>
  
  #include <asm/prom.h>
  
  extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[], __dtb_xlp_fvp_begin[],
  	__dtb_xlp_gvp_begin[], __dtb_xlp_rvp_begin[];
  static void *xlp_fdt_blob;
  
  void __init *xlp_dt_init(void *fdtp)
  {
  	if (!fdtp) {
  		switch (current_cpu_data.processor_id & PRID_IMP_MASK) {
  #ifdef CONFIG_DT_XLP_RVP
  		case PRID_IMP_NETLOGIC_XLP5XX:
  			fdtp = __dtb_xlp_rvp_begin;
  			break;
  #endif
  #ifdef CONFIG_DT_XLP_GVP
  		case PRID_IMP_NETLOGIC_XLP9XX:
  			fdtp = __dtb_xlp_gvp_begin;
  			break;
  #endif
  #ifdef CONFIG_DT_XLP_FVP
  		case PRID_IMP_NETLOGIC_XLP2XX:
  			fdtp = __dtb_xlp_fvp_begin;
  			break;
  #endif
  #ifdef CONFIG_DT_XLP_SVP
  		case PRID_IMP_NETLOGIC_XLP3XX:
  			fdtp = __dtb_xlp_svp_begin;
  			break;
  #endif
  #ifdef CONFIG_DT_XLP_EVP
  		case PRID_IMP_NETLOGIC_XLP8XX:
  			fdtp = __dtb_xlp_evp_begin;
  			break;
  #endif
  		default:
  			/* Pick a built-in if any, and hope for the best */
  			fdtp = __dtb_start;
  			break;
  		}
  	}
  	xlp_fdt_blob = fdtp;
  	return fdtp;
  }
  
  void __init xlp_early_init_devtree(void)
  {
  	__dt_setup_arch(xlp_fdt_blob);
  }
  
  void __init device_tree_init(void)
  {
  	unflatten_and_copy_device_tree();
  }
  
  static struct of_device_id __initdata xlp_ids[] = {
  	{ .compatible = "simple-bus", },
  	{},
  };
  
  int __init xlp8xx_ds_publish_devices(void)
  {
  	if (!of_have_populated_dt())
  		return 0;
  	return of_platform_bus_probe(NULL, xlp_ids, NULL);
  }
  
  device_initcall(xlp8xx_ds_publish_devices);