From patchwork Mon May 15 15:35:27 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 762577 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 3wRPmb6mybz9s7C for ; Tue, 16 May 2017 01:35:43 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b="ZeYYxYC+"; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965947AbdEOPfm (ORCPT ); Mon, 15 May 2017 11:35:42 -0400 Received: from mail-qt0-f169.google.com ([209.85.216.169]:35228 "EHLO mail-qt0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965935AbdEOPfh (ORCPT ); Mon, 15 May 2017 11:35:37 -0400 Received: by mail-qt0-f169.google.com with SMTP id v27so78779380qtg.2 for ; Mon, 15 May 2017 08:35:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=rY8s3532ufsD/QZ9NHY3Glb0s09VglHhB9TSrvqyMRM=; b=ZeYYxYC+DO+0UeoP5SrwyMiZCbble++t9GVwY48xSMOnzGb3w9lPIWOcttJV7JJOOC 8rrL6apq4kBEZ5hW2PNlIRb/FGpGs/9GrPk8WXxI7A3qPvX+/7GiIl+jKy62ZtRbuGCE vu5R8vc0jU006m5tkM/PnB2cksvAlPslsWUr4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=rY8s3532ufsD/QZ9NHY3Glb0s09VglHhB9TSrvqyMRM=; b=jq1yZvYVPFQp6XOJLCRv7lp/Y9W9MMNUlUdkp9NWD/yrr3Whk69UduCjp5TWiGqpz/ Sngn7hrvS2kWLooSb5Ke0GgilJ9MOi5iogeRM5tPX9ansabZr/5LrwQoik7lpOMyNupQ WWP30QwfcVz2jqfg3zk7gKp4mSp7bTYlaRouiMYJlFF91s/eR5kL459vK4opmHc6E6vF t2kROWDWJNOOliBjVsuCW1uBUkeRF4oPXseFQFWYmxfo+qiAunDWtkyzD8xizdBwuniV XAVPZzGeci6gu++ecYJOvziwkJkfjFSsSUTy7EG3fXFLbdgGxpMnemLfq7ifCUC4Mdhl xm5w== X-Gm-Message-State: AODbwcA55h9NAp8t1C+6tyA0sf0ZxpaQpOF7m1SN9nl1AJqpZhxGoEo+ kwnClw/CiOPaB+2B X-Received: by 10.223.168.97 with SMTP id l88mr4638567wrc.54.1494862535801; Mon, 15 May 2017 08:35:35 -0700 (PDT) Received: from mms-0441.qualcomm.mm-sol.com ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id l7sm14548023wrc.52.2017.05.15.08.35.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 15 May 2017 08:35:35 -0700 (PDT) From: Georgi Djakov To: linux-pm@vger.kernel.org, rjw@rjwysocki.net Cc: robh+dt@kernel.org, khilman@baylibre.com, mturquette@baylibre.com, gregkh@linuxfoundation.org, vincent.guittot@linaro.org, skannan@codeaurora.org, sboyd@codeaurora.org, andy.gross@linaro.org, seansw@qti.qualcomm.com, davidai@quicinc.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, georgi.djakov@linaro.org Subject: [RFC v1 3/3] dt-binding: Interconnect device-tree bindings draft Date: Mon, 15 May 2017 18:35:27 +0300 Message-Id: <20170515153527.27649-4-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170515153527.27649-1-georgi.djakov@linaro.org> References: <20170515153527.27649-1-georgi.djakov@linaro.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The interconnect API is not yet using DT bindings for expressing the relations between the API consumers and providers. This is posted a separate patch as it needs further discussions on how to represent this with DT. Signed-off-by: Georgi Djakov --- .../bindings/interconnect/interconnect.txt | 75 ++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 Documentation/devicetree/bindings/interconnect/interconnect.txt -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/interconnect/interconnect.txt b/Documentation/devicetree/bindings/interconnect/interconnect.txt new file mode 100644 index 000000000000..e38a29db981e --- /dev/null +++ b/Documentation/devicetree/bindings/interconnect/interconnect.txt @@ -0,0 +1,75 @@ +Interconnect Provider Device Tree Bindings +========================================= + +The purpose of this document is to define a common set of generic interconnect +providers/consumers properties. + + += interconnect providers = + +The interconnect provider binding is intended to represent the interconnect +controllers in the system. Each provider registers a set of interconnect +nodes, which expose the interconnect related capabilities of the interconnect +to consumer drivers. These capabilities can be throughput, latency, priority +etc. The consumer drivers set constraints on interconnect path (or endpoints) +depending on the usecase. Interconnect providers can also be interconnect +consumers, such as in the case where two network-on-chip fabrics interface +directly + +Required properties: +- compatible : contains the interconnect provider vendor specific compatible + string +- reg : register space of the interconnect controller hardware +- #interconnect-cells : number of cells in a interconnect specifier needed to + encode the interconnect node id. + +Example: + + snoc: snoc@0580000 { + compatible = "qcom,msm-bus-snoc"; + reg = <0x580000 0x14000>; + #interconnect-cells = <1>; + clock-names = "bus_clk", "bus_a_clk"; + clocks = <&rpmcc RPM_SMD_SNOC_CLK>, <&rpmcc RPM_SMD_SNOC_A_CLK>; + status = "okay"; + }; + bimc: bimc@0400000 { + compatible = "qcom,msm-bus-bimc"; + reg = <0x400000 0x62000>; + #interconnect-cells = <1>; + clock-names = "bus_clk", "bus_a_clk"; + clocks = <&rpmcc RPM_SMD_BIMC_CLK>, <&rpmcc RPM_SMD_BIMC_A_CLK>; + status = "okay"; + }; + pnoc: pnoc@500000 { + compatible = "qcom,msm-bus-pnoc"; + reg = <0x500000 0x11000>; + #interconnect-cells = <1>; + clock-names = "bus_clk", "bus_a_clk"; + clocks = <&rpmcc RPM_SMD_PCNOC_CLK>, <&rpmcc RPM_SMD_PCNOC_A_CLK>; + status = "okay"; + }; + += interconnect consumers = + +The interconnect consumers are device nodes which consume the interconnect +path(s) provided by the interconnect provider. There can be multiple +interconnect providers on a SoC and the consumer may consume multiple paths +from different providers depending on usecase and the components it has to +interact with. + +Required-properties: +interconnect-src : A phandle and interconnect provider specifier as defined by + bindings of the interconnect provider specified by phandle. + This denotes the source device port which will be used, as the + device may have multiple master ports. +interconnect-dst : A phandle and internet provider specifier pointing to the + local port of the target device. + +Example: + + sdhci@07864000 { + ... + interconnect-src = <&pnoc MAS_PNOC_SDCC_2>; + interconnect-dst = <&pnoc SLV_BLSP_1>; + };