linux-kernel - [PATCH] ARM64: dts: meson-gx: make efuse read-only

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Date:   Fri, 16 Mar 2018 15:50:21 +0100
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Kevin Hilman <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>
Cc:     Jerome Brunet <jbrunet@...libre.com>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM64: dts: meson-gx: make efuse read-only

efuse is one time programmable, so it is safer to deny write request
to this memory, unless the user is savvy enough to remove the read-only
flag from DTB

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
index 2d51ccd60628..3c31e21cbed7 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
@@ -132,6 +132,7 @@
 		compatible = "amlogic,meson-gx-efuse", "amlogic,meson-gxbb-efuse";
 		#address-cells = <1>;
 		#size-cells = <1>;
+		read-only;
 
 		sn: sn@14 {
 			reg = <0x14 0x10>;
-- 
2.14.3