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The previous fix for Armada XP, disabling I/O coherency, broke Armada 

375/38x.  Only switch the PL310 to I/O coherent mode if I/O coherency
 is enabled.
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Merge tag 'mvebu-fixes-3.19-6' of git://git.infradead.org/linux-mvebu into fixes

Merge "mvebu-fixes-6" from Andrew Lunn:

The previous fix for Armada XP, disabling I/O coherency, broke Armada
375/38x.  Only switch the PL310 to I/O coherent mode if I/O coherency
is enabled.

* tag 'mvebu-fixes-3.19-6' of git://git.infradead.org/linux-mvebu:
  ARM: mvebu: don't set the PL310 in I/O coherency mode when I/O coherency is disabled

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2015-01-28 14:59:33 -08:00
parent c6e3324e3b dcad68876c
commit 764e2c70ef
1 changed files with 7 additions and 0 deletions
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7
arch/arm/mach-mvebu/coherency.c
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@ -189,6 +189,13 @@ static void __init armada_375_380_coherency_init(struct device_node *np)
coherency_cpu_base = of_iomap(np, 0);
arch_ioremap_caller = armada_pcie_wa_ioremap_caller;
/*
* We should switch the PL310 to I/O coherency mode only if
* I/O coherency is actually enabled.
*/
if (!coherency_available())
return;
/*
* Add the PL310 property "arm,io-coherent". This makes sure the
* outer sync operation is not used, which allows to