1 files changed, 3 insertions, 2 deletions

diff --git a/arch/arm/plat-iop/setup.c b/arch/arm/plat-iop/setup.c
index 4689db638e95..9e573e78176a 100644
--- a/arch/arm/plat-iop/setup.c
+++ b/arch/arm/plat-iop/setup.c
@@ -16,14 +16,15 @@
 #include <asm/hardware/iop3xx.h>
 
 /*
- * Standard IO mapping for all IOP3xx based systems
+ * Standard IO mapping for all IOP3xx based systems.  Note that
+ * the IOP3xx OCCDR must be mapped uncached and unbuffered.
  */
 static struct map_desc iop3xx_std_desc[] __initdata = {
          {      /* mem mapped registers */
                 .virtual        = IOP3XX_PERIPHERAL_VIRT_BASE,
                 .pfn            = __phys_to_pfn(IOP3XX_PERIPHERAL_PHYS_BASE),
                 .length         = IOP3XX_PERIPHERAL_SIZE,
-                .type           = MT_DEVICE,
+                .type           = MT_UNCACHED,
          }, {   /* PCI IO space */
                 .virtual        = IOP3XX_PCI_LOWER_IO_VA,
                 .pfn            = __phys_to_pfn(IOP3XX_PCI_LOWER_IO_PA),