From: Girish K S <ks.giri@xxxxxxxxxxx>
The synopsys gigabit ethernet ip is compatible
with only 32 bit buffers. so restrict the driver
to use only 32 bit dma mapping.
Signed-off-by: Girish K S <ks.giri@xxxxxxxxxxx>
Signed-off-by: Siva Reddy <siva.kallam@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
arch/arm/mach-exynos/mach-exynos5-dt.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
index e47c2a5..9596861 100644
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -25,6 +25,7 @@
#include "common.h"
static u64 dma_mask64 = DMA_BIT_MASK(64);
+static u64 dma_mask32 = DMA_BIT_MASK(32);
static void __init exynos5_dt_map_io(void)
{
@@ -41,6 +42,10 @@ static int exynos5440_platform_notifier(struct notifier_block *nb,
dev->dma_mask = &dma_mask64;
dev->coherent_dma_mask = DMA_BIT_MASK(64);
+
+ if (of_device_is_compatible(dev->of_node, "snps,dwmac-3.70a"))
+ dev->dma_mask = &dma_mask32;
+
return NOTIFY_OK;
}
--
1.7.4.4
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