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 */
devm_ioremap_prot(struct device * dev,resource_size_t offset,size_t size,unsigned long flags)25 void __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 }
43 EXPORT_SYMBOL(devm_ioremap_prot);
44