From patchwork Wed Jan 13 04:18:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 362026 Delivered-To: patch@linaro.org Received: by 2002:a02:ccad:0:0:0:0:0 with SMTP id t13csp160274jap; Tue, 12 Jan 2021 20:20:48 -0800 (PST) X-Google-Smtp-Source: ABdhPJxcTBRyYIxHIL9PUIEAMqA5V1uFjCQ+ElbWkiR8O83QapejaxGl3cTSvnJgTaOHPV5trP4P X-Received: by 2002:a17:906:6c94:: with SMTP id s20mr207842ejr.0.1610511648005; Tue, 12 Jan 2021 20:20:48 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1610511648; cv=none; d=google.com; s=arc-20160816; b=RAV2/8iuRHtl+JzcabAYbZvenIkpE8os6sqmzrpZAza2NwzfhT/fSezjBIkp3MzskF GQ6Jxox28DtpzTvO+sHfI77uPN2idoaHH3S/i1LBlKK5406guMUWkicySa1wn9ilGioW NRnD+920IKT/DAi5+AV+gSOsYwAOih4pQkc6+wM06/oUa0edW0EgIBFpZHpjJgMChP1B eN8ZIJpb4adsy1yjR3s+l90ucLcZKE1Y2j9WSqCoexJCPbhtqbFrsRAw69IsB7wGC1ic 9MDwsjcoeGIBYAWOFQl0LTOU1Eh0ZIUxbkE8NBmOCaOjj2hqCz5jDcPXt+3NgqU+1jvk RbfA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:references:in-reply-to:message-id:date:subject :cc:to:from; bh=qkU0VYtaxQAjk5bwKyaifWcMEIWYjXW0o8edL6b6FGI=; b=df5sO+VEeQ2PmqvGLeveaOWVgpB7f0m/mNQvzD5MLSysDZoB1eHq+7DIN9MXwwC0wc oXKcZ28xQH2V7DD8m4eFKN3ZqVvVfATVJlKENDgzT+OY7oldZpBMUmWookBoe9HZbR+w N9d8HUR1P9ukkWo9Bo5UDLmXZmvgtRUWWrO9NRdY/y3zttGmn0uoOYMY7HMJM5Wtvk0K DrR3nyaoRwgFnJi/ara0nrWLdJRR/9koRyEFktaIxXCj00QcXkL+i06bKW02/OTzWlDr LCyJbH8N8F3660lTD4CjrGmA1bRJ/pkReF6tYuJUrZzMIsiQsYKEnYkFzSY13UDezIq9 fKYA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of devicetree-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id nh1si124478ejb.482.2021.01.12.20.20.47; Tue, 12 Jan 2021 20:20:47 -0800 (PST) Received-SPF: pass (google.com: domain of devicetree-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of devicetree-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726011AbhAMETw (ORCPT + 6 others); Tue, 12 Jan 2021 23:19:52 -0500 Received: from foss.arm.com ([217.140.110.172]:57992 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725950AbhAMETw (ORCPT ); Tue, 12 Jan 2021 23:19:52 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3868813A1; Tue, 12 Jan 2021 20:18:41 -0800 (PST) Received: from p8cg001049571a15.blr.arm.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EFEC13F719; Tue, 12 Jan 2021 20:18:37 -0800 (PST) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org Cc: mathieu.poirier@linaro.org, suzuki.poulose@arm.com, mike.leach@linaro.org, Anshuman Khandual , Linu Cherian , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring Subject: [PATCH V2 06/11] dts: bindings: Document device tree bindings for ETE Date: Wed, 13 Jan 2021 09:48:13 +0530 Message-Id: <1610511498-4058-7-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1610511498-4058-1-git-send-email-anshuman.khandual@arm.com> References: <1610511498-4058-1-git-send-email-anshuman.khandual@arm.com> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 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.yaml | 71 ++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/ete.yaml -- 2.7.4 diff --git a/Documentation/devicetree/bindings/arm/ete.yaml b/Documentation/devicetree/bindings/arm/ete.yaml new file mode 100644 index 0000000..00e6a77 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/ete.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause +# Copyright 2021, Arm Ltd +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/arm/ete.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: ARM Embedded Trace Extensions + +maintainers: + - Suzuki K Poulose + - Mathieu Poirier + +description: | + Arm Embedded Trace Extension(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. + +properties: + $nodename: + pattern: "^ete([0-9a-f]+)$" + compatible: + items: + - const: arm,embedded-trace-extension + + cpu: + description: | + Handle to the cpu this ETE is bound to. + $ref: /schemas/types.yaml#/definitions/phandle + + out-ports: + description: | + Out put connections from the ETE to legacy CoreSight trace bus. + $ref: /schemas/graph.yaml#/properties/ports + +required: + - compatible + - cpu + +additionalProperties: false + +examples: + +# An ETE node without legacy CoreSight connections + - | + ete0 { + compatible = "arm,embedded-trace-extension"; + cpu = <&cpu_0>; + }; +# An ETE node with legacy CoreSight connections + - | + ete1 { + compatible = "arm,embedded-trace-extension"; + cpu = <&cpu_1>; + + out-ports { /* legacy coresight connection */ + port { + ete1_out_port: endpoint { + remote-endpoint = <&funnel_in_port0>; + }; + }; + }; + }; + +...