1/*
 2 * Copyright (C) 2008 Freescale Semiconductor, Inc.
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License
 6 * as published by the Free Software Foundation; either version
 7 * 2 of the License, or (at your option) any later version.
 8 */
 9
10#include <linux/device.h>	/* devres_*(), devm_ioremap_release() */
11#include <linux/gfp.h>
12#include <linux/io.h>		/* ioremap_prot() */
13#include <linux/export.h>	/* EXPORT_SYMBOL() */
14
15/**
16 * devm_ioremap_prot - Managed ioremap_prot()
17 * @dev: Generic device to remap IO address for
18 * @offset: BUS offset to map
19 * @size: Size of map
20 * @flags: Page flags
21 *
22 * Managed ioremap_prot().  Map is automatically unmapped on driver
23 * detach.
24 */
25void __iomem *devm_ioremap_prot(struct device *dev, resource_size_t offset,
26				 size_t size, unsigned long flags)
27{
28	void __iomem **ptr, *addr;
29
30	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
31	if (!ptr)
32		return NULL;
33
34	addr = ioremap_prot(offset, size, flags);
35	if (addr) {
36		*ptr = addr;
37		devres_add(dev, ptr);
38	} else
39		devres_free(ptr);
40
41	return addr;
42}
43EXPORT_SYMBOL(devm_ioremap_prot);