linux-kernel - [PATCH 1/2] arm64: dts: qcom: qrb5165-rb5-vision-mezzanine: Fix broken overlay root

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Message-Id: <20250226-qcom-nonroot-overlays-v1-1-26c6e7605833@trvn.ru>
Date: Wed, 26 Feb 2025 19:29:55 +0500
From: Nikita Travkin <nikita@...n.ru>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Nikita Travkin <nikita@...n.ru>
Subject: [PATCH 1/2] arm64: dts: qcom: qrb5165-rb5-vision-mezzanine: Fix
 broken overlay root

When converting to the overlay format, it was missed that "/" in the
overlay corresponds to the overlay's own root node and not the fragment
targeted to update root of the base dts, which should be "&{/}" instead.
This results in the cma node never actually being applied by libfdt.

Fix the overlay to use correct target node.

Fixes: 231c03c6119d ("arm64: dts: qcom: qrb5165-rb5-vision-mezzanine: Convert mezzanine riser to dtbo")
Signed-off-by: Nikita Travkin <nikita@...n.ru>
---
 arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dtso | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dtso b/arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dtso
index ae256c713a36078afdadc67193f381a19ea8e5d3..254df3d518d8cbfb1082511f38e132435b7fdf59 100644
--- a/arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dtso
+++ b/arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dtso
@@ -9,7 +9,7 @@
 #include <dt-bindings/clock/qcom,camcc-sm8250.h>
 #include <dt-bindings/gpio/gpio.h>
 
-/ {
+&{/} {
 	reserved-memory {
 		linux,cma {
 			compatible = "shared-dma-pool";

-- 
2.48.1