From: Thomas Abraham <thomas.ab@xxxxxxxxxxx>
Use a platform bus notifier callback function to set the correct dma_mask and
coherent_dma_mask for every device registered on Exynos5440 based machine.
Signed-off-by: Thomas Abraham <thomas.ab@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
arch/arm/mach-exynos/mach-exynos5-dt.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
index 753b94f..e47c2a5 100644
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -14,6 +14,7 @@
#include <linux/memblock.h>
#include <linux/io.h>
#include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
#include <asm/mach/arch.h>
#include <mach/regs-pmu.h>
@@ -23,11 +24,30 @@
#include "common.h"
+static u64 dma_mask64 = DMA_BIT_MASK(64);
+
static void __init exynos5_dt_map_io(void)
{
exynos_init_io(NULL, 0);
}
+static int exynos5440_platform_notifier(struct notifier_block *nb,
+ unsigned long event, void *__dev)
+{
+ struct device *dev = __dev;
+
+ if (event != BUS_NOTIFY_ADD_DEVICE)
+ return NOTIFY_DONE;
+
+ dev->dma_mask = &dma_mask64;
+ dev->coherent_dma_mask = DMA_BIT_MASK(64);
+ return NOTIFY_OK;
+}
+
+static struct notifier_block exynos5440_platform_nb = {
+ .notifier_call = exynos5440_platform_notifier,
+};
+
static void __init exynos5_dt_machine_init(void)
{
struct device_node *i2c_np;
@@ -52,6 +72,9 @@ static void __init exynos5_dt_machine_init(void)
}
}
+ if (of_machine_is_compatible("samsung,exynos5440"))
+ bus_register_notifier(&platform_bus_type, &exynos5440_platform_nb);
+
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
--
1.7.4.4
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