From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: agross@kernel.org, bjorn.andersson@linaro.org
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] arm64: dts: msm8916: Properly deal with ETMv4 power management
Date: Tue, 11 Feb 2020 11:30:11 -0700 [thread overview]
Message-ID: <20200211183011.24720-1-mathieu.poirier@linaro.org> (raw)
Properly deal with ETMv4 power management by adding the
"coresight-loses-context-with-cpu" property. Otherwise tracer
configuration is lost when CPUs enter deep idle states, resulting
in the failure of the trace session.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
arch/arm64/boot/dts/qcom/msm8916.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 8686e101905c..846c5b4a53e8 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -1363,6 +1363,7 @@
clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
clock-names = "apb_pclk", "atclk";
+ arm,coresight-loses-context-with-cpu;
cpu = <&CPU0>;
@@ -1381,6 +1382,7 @@
clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
clock-names = "apb_pclk", "atclk";
+ arm,coresight-loses-context-with-cpu;
cpu = <&CPU1>;
@@ -1399,6 +1401,7 @@
clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
clock-names = "apb_pclk", "atclk";
+ arm,coresight-loses-context-with-cpu;
cpu = <&CPU2>;
@@ -1417,6 +1420,7 @@
clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
clock-names = "apb_pclk", "atclk";
+ arm,coresight-loses-context-with-cpu;
cpu = <&CPU3>;
--
2.20.1
next reply other threads:[~2020-02-11 18:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 18:30 Mathieu Poirier [this message]
2020-02-14 5:31 ` [PATCH] arm64: dts: msm8916: Properly deal with ETMv4 power management Bjorn Andersson
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