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[2/2] ARM: EXYNOS: force mac ip to 32bit dma

Message ID 1365072704-4568-2-git-send-email-kgene.kim@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kim Kukjin April 4, 2013, 10:51 a.m. UTC 
From: Girish K S <ks.giri@samsung.com>

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@samsung.com>
Signed-off-by: Siva Reddy <siva.kallam@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---
 arch/arm/mach-exynos/mach-exynos5-dt.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
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Patch

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;
 }