linux-kernel - [PATCH v2] arm64: dts: qcom: qcs615: disable the CTI device of the camera block

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Message-Id: <20250611030003.3801-1-jie.gan@oss.qualcomm.com>
Date: Wed, 11 Jun 2025 11:00:03 +0800
From: Jie Gan <jie.gan@....qualcomm.com>
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>, Jie Gan <quic_jiegan@...cinc.com>
Cc: Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Jinlong Mao <quic_jinlmao@...cinc.com>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] arm64: dts: qcom: qcs615: disable the CTI device of the camera block

Disable the CTI device of the camera block to prevent potential NoC errors
during AMBA bus device matching.

The clocks for the Qualcomm Debug Subsystem (QDSS) are managed by aoss_qmp
through a mailbox. However, the camera block resides outside the AP domain,
meaning its QDSS clock cannot be controlled via aoss_qmp.

Fixes: bf469630552a ("arm64: dts: qcom: qcs615: Add coresight nodes")
Signed-off-by: Jie Gan <jie.gan@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qcs615.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs615.dtsi b/arch/arm64/boot/dts/qcom/qcs615.dtsi
index bb8b6c3ebd03..fc2ab750f2cd 100644
--- a/arch/arm64/boot/dts/qcom/qcs615.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs615.dtsi
@@ -2461,6 +2461,9 @@ cti@...3000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+
+			/* Not all required clocks can be enabled from the OS */
+			status = "fail";
 		};
 
 		cti@...0000 {
-- 
2.34.1