linux-kernel - [PATCH] arm64: dts: qcom: sdm845: Support ETMv4 power management

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Date:   Tue, 21 Jul 2020 12:43:43 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Subject: [PATCH] arm64: dts: qcom: sdm845: Support ETMv4 power management

Add "arm,coresight-loses-context-with-cpu" property to coresight
ETM nodes to avoid failure of trace session because of losing
context on entering deep idle states.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
---
 arch/arm64/boot/dts/qcom/sdm845.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index e506793407d8..0b5f063dcaea 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -3016,6 +3016,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
@@ -3035,6 +3036,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
@@ -3054,6 +3056,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
@@ -3073,6 +3076,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
@@ -3092,6 +3096,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
@@ -3111,6 +3116,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
@@ -3130,6 +3136,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
@@ -3149,6 +3156,7 @@ etm@...0000 {
 
 			clocks = <&aoss_qmp>;
 			clock-names = "apb_pclk";
+			arm,coresight-loses-context-with-cpu;
 
 			out-ports {
 				port {
-- 
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