ARM: dts: Disable MDMA1 node for arndale-octa board

MDMA1 can support both secure and non-secure AXI transactions. When this
is enabled in the kernel for boards that run in secure mode, we get
imprecise external aborts causing the kernel to oops.

Unhandled fault: imprecise external abort (0x1406) at 0x00000000
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007

Suggested-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Tested-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
index f509e8fc290f59541100de086594f788b8beec93..810ec732f855df72d978bac5733efb148e475ac0 100644 (file)
--- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
+++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
@@ -361,4 +361,16 @@
                        gpio-key,wakeup;
                };
        };
+
+       amba {
+               mdma1: mdma@11C10000 {
+                       /*
+                        * MDMA1 can support both secure and non-secure
+                        * AXI transactions. When this is enabled in the kernel
+                        * for boards that run in secure mode, we are getting
+                        * imprecise external aborts causing the kernel to oops.
+                        */
+                       status = "disabled";
+               };
+       };
 };