From patchwork Thu Sep 11 16:04:31 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 388318 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 8975A1400E6 for ; Fri, 12 Sep 2014 02:05:12 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757077AbaIKQEo (ORCPT ); Thu, 11 Sep 2014 12:04:44 -0400 Received: from mail-pa0-f52.google.com ([209.85.220.52]:43149 "EHLO mail-pa0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756995AbaIKQEm (ORCPT ); Thu, 11 Sep 2014 12:04:42 -0400 Received: by mail-pa0-f52.google.com with SMTP id kq14so7229308pab.39 for ; Thu, 11 Sep 2014 09:04:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=SFycbSI9I0LFFjBgZNDUErNKmNt61iNzkduYPQJLtBI=; b=lf6Tl0gAKr32sLvjnNQcMKNyCUs83xTb0HIJYTjbWPKURoAGR7DRz01+L+Y3Uw/PVE 3fqd4agWwiMvoPsHb8IfZZRjOsmKxlFSqtNvCn2hbVkztpQLd/t8gYYRPoogHI+eELcJ 9Jm88rc4MWpAB6FUAMKBrKHljxS7hP8yGr0CQ7qw2Xik0om03Ki9xNi5ysFC0a5+zQeI eqISTUjAmRaWDU63JSW2gd3m7Gd6ZUlNmdiBPtqB2ri40Iu65qmGn7kUTKC4FrjEsywc QNAM9gTT7m0HN+amERXSED/p6hbNFQrna4NqjjUN+Cn/LQqb63x5PASETGn28NUO60J2 TXEw== X-Gm-Message-State: ALoCoQmckXUsTyrnUSr9KKcvdA9E0wSAz31aUMHqEw4UQOPDUpeVOJZcSb+U4yhfBvOoONZ8FWrR X-Received: by 10.68.94.226 with SMTP id df2mr3014794pbb.122.1410451482067; Thu, 11 Sep 2014 09:04:42 -0700 (PDT) Received: from t430.cg.shawcable.net (S0106002369de4dac.cg.shawcable.net. [70.73.24.112]) by mx.google.com with ESMTPSA id i2sm1586584pat.3.2014.09.11.09.04.40 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 11 Sep 2014 09:04:41 -0700 (PDT) From: mathieu.poirier@linaro.org To: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org Subject: [PATCH] coresight: bindings for coresight drivers Date: Thu, 11 Sep 2014 10:04:31 -0600 Message-Id: <1410451471-16121-1-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Mathieu Poirier Coresight IP blocks allow for the support of HW assisted tracing on ARM SoCs. Bindings for the currently available blocks are presented herein. Signed-off-by: Pratik Patel Signed-off-by: Panchaxari Prasannamurthy Signed-off-by: Mathieu Poirier Acked-by: Rob Herring --- .../devicetree/bindings/arm/coresight.txt | 203 +++++++++++++++++++++ 1 file changed, 203 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/coresight.txt diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt new file mode 100644 index 0000000..96dd947 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/coresight.txt @@ -0,0 +1,203 @@ +* CoreSight Components: + +CoreSight components are compliant with the ARM CoreSight architecture +specification and can be connected in various topologies to suit a particular +SoCs tracing needs. These trace components can generally be classified as sinks, +links and sources. Trace data produced by one or more sources flows through the +intermediate links connecting the source to the currently selected sink. Each +CoreSight component device should use these properties to describe its hardware +characteristcs. + +* Required properties for all components *except* non-configurable replicators: + + * compatible: These have to be supplemented with "arm,primecell" as + drivers are using the AMBA bus interface. Possible values include: + - "arm,coresight-etb10", "arm,primecell"; + - "arm,coresight-tpiu", "arm,primecell"; + - "arm,coresight-tmc", "arm,primecell"; + - "arm,coresight-funnel", "arm,primecell"; + - "arm,coresight-etm3x", "arm,primecell"; + + * reg: physical base address and length of the register + set(s) of the component. + + * clocks: the clock associated to this component. + + * clock-names: the name of the clock as referenced by the code. + Since we are using the AMBA framework, the name should be + "apb_pclk". + + * port or ports: The representation of the component's port + layout using the generic DT graph presentation found in + "bindings/graph.txt". + +* Required properties for devices that don't show up on the AMBA bus, such as + non-configurable replicators: + + * compatible: Currently supported value is (note the absence of the + AMBA markee): + - "arm,coresight-replicator" + + * id: a unique number that will identify this replicator. + + * port or ports: same as above. + +* Optional properties for ETM/PTMs: + + * arm,cp14: must be present if the system accesses ETM/PTM management registers + via co-processor 14. + + * cpu: the cpu phandle this ETM/PTM is affined to. When omitted the source is + considered to belong to CPU0. + +* Optional property for TMC: + + * arm,buffer-size: size of contiguous buffer space for TMC ETR + (embedded trace router) + + +Example: + +1. Sinks + etb@0,20010000 { + compatible = "arm,coresight-etb10", "arm,primecell"; + reg = <0 0x20010000 0 0x1000>; + + coresight-default-sink; + clocks = <&oscclk6a>; + clock-names = "apb_pclk"; + port { + etb_in_port: endpoint@0 { + slave-mode; + remote-endpoint = <&replicator_out_port0>; + }; + }; + }; + + tpiu@0,20030000 { + compatible = "arm,coresight-tpiu", "arm,primecell"; + reg = <0 0x20030000 0 0x1000>; + + clocks = <&oscclk6a>; + clock-names = "apb_pclk"; + port { + tpiu_in_port: endpoint@0 { + slave-mode; + remote-endpoint = <&replicator_out_port1>; + }; + }; + }; + +2. Links + replicator { + /* non-configurable replicators don't show up on the + * AMBA bus. As such no need to add "arm,primecell". + */ + compatible = "arm,coresight-replicator"; + /* this will show up in debugfs as "0.replicator" */ + id = <0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + /* replicator output ports */ + port@0 { + reg = <0>; + replicator_out_port0: endpoint { + remote-endpoint = <&etb_in_port>; + }; + }; + + port@1 { + reg = <1>; + replicator_out_port1: endpoint { + remote-endpoint = <&tpiu_in_port>; + }; + }; + + /* replicator input port */ + port@2 { + reg = <0>; + replicator_in_port0: endpoint { + slave-mode; + remote-endpoint = <&funnel_out_port0>; + }; + }; + }; + }; + + funnel@0,20040000 { + compatible = "arm,coresight-funnel", "arm,primecell"; + reg = <0 0x20040000 0 0x1000>; + + clocks = <&oscclk6a>; + clock-names = "apb_pclk"; + ports { + #address-cells = <1>; + #size-cells = <0>; + + /* funnel output port */ + port@0 { + reg = <0>; + funnel_out_port0: endpoint { + remote-endpoint = <&replicator_in_port0>; + }; + }; + + /* funnel input ports */ + port@1 { + reg = <0>; + funnel_in_port0: endpoint { + slave-mode; + remote-endpoint = <&ptm0_out_port>; + }; + }; + + port@2 { + reg = <1>; + funnel_in_port1: endpoint { + slave-mode; + remote-endpoint = <&ptm1_out_port>; + }; + }; + + port@3 { + reg = <2>; + funnel_in_port2: endpoint { + slave-mode; + remote-endpoint = <&etm0_out_port>; + }; + }; + + }; + }; + +3. Sources + ptm@0,2201c000 { + compatible = "arm,coresight-etm3x", "arm,primecell"; + reg = <0 0x2201c000 0 0x1000>; + + cpu = <&cpu0>; + clocks = <&oscclk6a>; + clock-names = "apb_pclk"; + port { + ptm0_out_port: endpoint { + remote-endpoint = <&funnel_in_port0>; + }; + }; + }; + + ptm@0,2201d000 { + compatible = "arm,coresight-etm3x", "arm,primecell"; + reg = <0 0x2201d000 0 0x1000>; + + cpu = <&cpu1>; + clocks = <&oscclk6a>; + clock-names = "apb_pclk"; + port { + ptm1_out_port: endpoint { + remote-endpoint = <&funnel_in_port1>; + }; + }; + };