linux-kernel - [PATCH AUTOSEL 3.18 50/98] ARM: dts: disable CCI on exynos5420 based arndale-octa

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Message-Id: <20181025141853.214051-50-sashal@kernel.org>
Date:   Thu, 25 Oct 2018 10:18:05 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Abhilash Kesavan <a.kesavan@...sung.com>,
        Olof Johansson <olof@...om.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 3.18 50/98] ARM: dts: disable CCI on exynos5420 based arndale-octa

From: Abhilash Kesavan <a.kesavan@...sung.com>

[ Upstream commit 25217fef355174209eff68c0eb438a8af5d7b01c ]

The arndale-octa board was giving "imprecise external aborts" during
boot-up with MCPM enabled. CCI enablement of the boot cluster was found
to be the cause of these aborts (possibly because the secure f/w was not
allowing it). Hence, disable CCI for the arndale-octa board.

Signed-off-by: Abhilash Kesavan <a.kesavan@...sung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Tested-by: Kevin Hilman <khilman@...aro.org>
Tested-by: Tyler Baker <tyler.baker@...aro.org>
Signed-off-by: Olof Johansson <olof@...om.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/exynos5420-arndale-octa.dts | 4 ++++
 arch/arm/boot/dts/exynos5420.dtsi             | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
index aa7a7d727a7e..db2c1c4cd900 100644
--- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
+++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
@@ -372,3 +372,7 @@
 &usbdrd_dwc3_1 {
 	dr_mode = "host";
 };
+
+&cci {
+	status = "disabled";
+};
diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 1353a092134f..9655a3efbd15 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -120,7 +120,7 @@
 		};
 	};
 
-	cci@...20000 {
+	cci: cci@...20000 {
 		compatible = "arm,cci-400";
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
2.17.1