/*
   * Copyright (C) 2008 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
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #include <linux/device.h>	/* devres_*(), devm_ioremap_release() */
  #include <linux/gfp.h>
  #include <linux/io.h>		/* ioremap_prot() */
  #include <linux/export.h>	/* EXPORT_SYMBOL() */
  
  /**
   * devm_ioremap_prot - Managed ioremap_prot()
   * @dev: Generic device to remap IO address for
   * @offset: BUS offset to map
   * @size: Size of map
   * @flags: Page flags
   *
   * Managed ioremap_prot().  Map is automatically unmapped on driver
   * detach.
   */
  void __iomem *devm_ioremap_prot(struct device *dev, resource_size_t offset,
  				 size_t size, unsigned long flags)
  {
  	void __iomem **ptr, *addr;
  
  	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
  	if (!ptr)
  		return NULL;
  
  	addr = ioremap_prot(offset, size, flags);
  	if (addr) {
  		*ptr = addr;
  		devres_add(dev, ptr);
  	} else
  		devres_free(ptr);
  
  	return addr;
  }
  EXPORT_SYMBOL(devm_ioremap_prot);