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ARM: kirkwood: ioremap the cpu_config register before using it.

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With the move to mach-mvebu and MULTI_V5, the global iomap for all
registers will be going away. So explicitly map the CPU configuration
register before using it.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Andrew Lunn 2014-02-22 20:14:48 +01:00 committed by Jason Cooper
parent dab7dfb6c0
commit 7f28fd6ebe
2 changed files with 16 additions and 7 deletions
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22
arch/arm/mach-kirkwood/board-dt.c
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@ -191,15 +191,23 @@ eth_fixup_skip:
}
}
/*
* Disable propagation of mbus errors to the CPU local bus, as this
* causes mbus errors (which can occur for example for PCI aborts) to
* throw CPU aborts, which we're not set up to deal with.
*/
static void __init kirkwood_disable_mbus_error_propagation(void)
{
void __iomem *cpu_config;
cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
iounmap(cpu_config);
}
static void __init kirkwood_dt_init(void)
{
/*
* Disable propagation of mbus errors to the CPU local bus,
* as this causes mbus errors (which can occur for example
* for PCI aborts) to throw CPU aborts, which we're not set
* up to deal with.
*/
writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG);
kirkwood_disable_mbus_error_propagation();
BUG_ON(mvebu_mbus_dt_init());

1
arch/arm/mach-kirkwood/include/mach/bridge-regs.h
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@ -14,6 +14,7 @@
#include <mach/kirkwood.h>
#define CPU_CONFIG (BRIDGE_VIRT_BASE + 0x0100)
#define CPU_CONFIG_PHYS (BRIDGE_PHYS_BASE + 0x0100)
#define CPU_CONFIG_ERROR_PROP 0x00000004
#define CPU_CONTROL (BRIDGE_VIRT_BASE + 0x0104)