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Mon, 10 Mar 2025 08:45:03 -0700 (PDT) Message-ID: Date: Mon, 10 Mar 2025 15:45:02 +0000 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: hi3660: Add property for fixing CPUIdle To: Leo Yan References: <20250310093708.9332-1-leo.yan@arm.com> Content-Language: en-US Cc: Wei Xu , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, coresight@lists.linaro.org From: James Clark In-Reply-To: <20250310093708.9332-1-leo.yan@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/03/2025 9:37 am, Leo Yan wrote: > During CPU low power modes, ETM components will lose their context. Add > the "arm,coresight-loses-context-with-cpu" property to ETM nodes to save > and restore ETM context for CPU idle states. > > Signed-off-by: Leo Yan > --- > arch/arm64/boot/dts/hisilicon/hi3660-coresight.dtsi | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/arm64/boot/dts/hisilicon/hi3660-coresight.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660-coresight.dtsi > index 79a55a0fa2f1..4c6a075908d1 100644 > --- a/arch/arm64/boot/dts/hisilicon/hi3660-coresight.dtsi > +++ b/arch/arm64/boot/dts/hisilicon/hi3660-coresight.dtsi > @@ -17,6 +17,7 @@ etm@ecc40000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu0>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { > @@ -34,6 +35,7 @@ etm@ecd40000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu1>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { > @@ -51,6 +53,7 @@ etm@ece40000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu2>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { > @@ -68,6 +71,7 @@ etm@ecf40000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu3>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { > @@ -160,6 +164,7 @@ etm@ed440000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu4>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { > @@ -177,6 +182,7 @@ etm@ed540000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu5>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { > @@ -194,6 +200,7 @@ etm@ed640000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu6>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { > @@ -211,6 +218,7 @@ etm@ed740000 { > clocks = <&crg_ctrl HI3660_PCLK>; > clock-names = "apb_pclk"; > cpu = <&cpu7>; > + arm,coresight-loses-context-with-cpu; > > out-ports { > port { Reviewed-by: James Clark