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Sun, 03 Jan 2021 09:02:19 -0800 (PST) Received: from robh.at.kernel.org ([64.188.179.253]) by smtp.gmail.com with ESMTPSA id o7sm41163123iov.1.2021.01.03.09.02.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jan 2021 09:02:18 -0800 (PST) Received: (nullmailer pid 4053640 invoked by uid 1000); Sun, 03 Jan 2021 17:02:16 -0000 Date: Sun, 3 Jan 2021 10:02:16 -0700 From: Rob Herring To: Anshuman Khandual Subject: Re: [PATCH 06/11] dts: bindings: Document device tree bindings for ETE Message-ID: <20210103170216.GA4048658@robh.at.kernel.org> References: <1608717823-18387-1-git-send-email-anshuman.khandual@arm.com> <1608717823-18387-7-git-send-email-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1608717823-18387-7-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210103_120220_916287_EAAFCFED X-CRM114-Status: GOOD ( 21.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Mathieu Poirier , Suzuki K Poulose , coresight@lists.linaro.org, linux-kernel@vger.kernel.org, Linu Cherian , linux-arm-kernel@lists.infradead.org, Mike Leach Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Dec 23, 2020 at 03:33:38PM +0530, Anshuman Khandual wrote: > From: Suzuki K Poulose > > Document the device tree bindings for Embedded Trace Extensions. > ETE can be connected to legacy coresight components and thus > could optionally contain a connection graph as described by > the CoreSight bindings. > > Cc: devicetree@vger.kernel.org > Cc: Mathieu Poirier > Cc: Mike Leach > Cc: Rob Herring > Signed-off-by: Suzuki K Poulose > Signed-off-by: Anshuman Khandual > --- > Documentation/devicetree/bindings/arm/ete.txt | 41 +++++++++++++++++++++++++++ > 1 file changed, 41 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arm/ete.txt Bindings are in schema format now, please convert this. > > diff --git a/Documentation/devicetree/bindings/arm/ete.txt b/Documentation/devicetree/bindings/arm/ete.txt > new file mode 100644 > index 0000000..b52b507 > --- /dev/null > +++ b/Documentation/devicetree/bindings/arm/ete.txt > @@ -0,0 +1,41 @@ > +Arm Embedded Trace Extensions > + > +Arm Embedded Trace Extensions (ETE) is a per CPU trace component that > +allows tracing the CPU execution. It overlaps with the CoreSight ETMv4 > +architecture and has extended support for future architecture changes. > +The trace generated by the ETE could be stored via legacy CoreSight > +components (e.g, TMC-ETR) or other means (e.g, using a per CPU buffer > +Arm Trace Buffer Extension (TRBE)). Since the ETE can be connected to > +legacy CoreSight components, a node must be listed per instance, along > +with any optional connection graph as per the coresight bindings. > +See bindings/arm/coresight.txt. > + > +** ETE Required properties: > + > +- compatible : should be one of: > + "arm,embedded-trace-extensions" > + > +- cpu : the CPU phandle this ETE belongs to. If this is 1:1 with CPUs, then perhaps it should be a child node of the CPU nodes. > + > +** Optional properties: > +- CoreSight connection graph, see bindings/arm/coresight.txt. > + > +** Example: > + > +ete_0 { > + compatible = "arm,embedded-trace-extension"; > + cpu = <&cpu_0>; > +}; > + > +ete_1 { > + compatible = "arm,embedded-trace-extension"; > + cpu = <&cpu_1>; > + > + out-ports { /* legacy CoreSight connection */ > + port { > + ete1_out_port: endpoint@0 { > + remote-endpoint = <&funnel_in_port0>; > + }; > + }; > + }; > +}; > -- > 2.7.4 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel