From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33E17C433DB for ; Wed, 23 Dec 2020 10:06:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0AC8322473 for ; Wed, 23 Dec 2020 10:06:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726022AbgLWKFN (ORCPT ); Wed, 23 Dec 2020 05:05:13 -0500 Received: from foss.arm.com ([217.140.110.172]:48052 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728387AbgLWKFN (ORCPT ); Wed, 23 Dec 2020 05:05:13 -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 215231474; Wed, 23 Dec 2020 02:04:01 -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 DB8063F718; Wed, 23 Dec 2020 02:03:57 -0800 (PST) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org Cc: linux-kernel@vger.kernel.org, Anshuman Khandual , Mathieu Poirier , Suzuki K Poulose , Mike Leach , Linu Cherian , devicetree@vger.kernel.org, Rob Herring Subject: [PATCH 06/11] dts: bindings: Document device tree bindings for ETE Date: Wed, 23 Dec 2020 15:33:38 +0530 Message-Id: <1608717823-18387-7-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1608717823-18387-1-git-send-email-anshuman.khandual@arm.com> References: <1608717823-18387-1-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.txt | 41 +++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/ete.txt 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. + +** 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