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ARM: highbank: Only touch common coherency control register fields 

Midway adds new register fields to the coherency control registers, so
writing absolute values will break on Midway. Change the register
accesses to only modify the necessary and common fields in order to
support both Midway and Highbank.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Rob Herring 2013-07-21 14:53:37 -05:00 committed by Olof Johansson
parent eaed13527f
commit e64bf95e68
1 changed files with 4 additions and 3 deletions
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7
arch/arm/mach-highbank/highbank.c
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@ -115,6 +115,7 @@ static int highbank_platform_notifier(struct notifier_block *nb,
{
struct resource *res;
int reg = -1;
u32 val;
struct device *dev = __dev;
if (event != BUS_NOTIFY_ADD_DEVICE)
@ -141,10 +142,10 @@ static int highbank_platform_notifier(struct notifier_block *nb,
return NOTIFY_DONE;
if (of_property_read_bool(dev->of_node, "dma-coherent")) {
writel(0xff31, sregs_base + reg);
val = readl(sregs_base + reg);
writel(val | 0xff01, sregs_base + reg);
set_dma_ops(dev, &arm_coherent_dma_ops);
} else
writel(0, sregs_base + reg);
}
return NOTIFY_OK;
}