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ARM: Orion5x - Restore parts of io.h, with rework 

Commit 4d5fc58dbe (ARM: remove bunch of
now unused mach/io.h files) removed the orion5x io.h. Unfortunately,
this is still needed for the definition of IO_SPACE_LIMIT which
overrides the default 64K. All Orion based systems have 1Mbyte of IO
space per PCI[e] bus, and try to request_resource() this size. Orion5x
has two such PCI buses.

It is likely that the original, removed version, was broken. This
version might be less broken. However, it has not been tested on
hardware with a PCI card, let alone hardware with a PCI card with IO
capabilities.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Andrew Lunn 2012-06-22 20:57:57 +02:00 committed by Olof Johansson
parent a34a3b7264
commit b5e12229a4
2 changed files with 23 additions and 0 deletions
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1
arch/arm/Kconfig
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@ -589,6 +589,7 @@ config ARCH_ORION5X
select PCI
select ARCH_REQUIRE_GPIOLIB
select GENERIC_CLOCKEVENTS
select NEED_MACH_IO_H
select PLAT_ORION
help
Support for the following Marvell Orion 5x series SoCs:

22
arch/arm/mach-orion5x/include/mach/io.h Normal file
View File

@ -0,0 +1,22 @@
/*
* arch/arm/mach-orion5x/include/mach/io.h
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __ASM_ARCH_IO_H
#define __ASM_ARCH_IO_H
#include <mach/orion5x.h>
#include <asm/sizes.h>
#define IO_SPACE_LIMIT SZ_2M
static inline void __iomem *__io(unsigned long addr)
{
return (void __iomem *)(addr + ORION5X_PCIE_IO_VIRT_BASE);
}
#define __io(a) __io(a)
#endif