From patchwork Sat Dec 8 17:02:11 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 10719503 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2E8541759 for ; Sat, 8 Dec 2018 17:03:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D7BB2B023 for ; Sat, 8 Dec 2018 17:03:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 106CC2B4DE; Sat, 8 Dec 2018 17:03:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 95B6E2B023 for ; Sat, 8 Dec 2018 17:03:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726234AbeLHRDE (ORCPT ); Sat, 8 Dec 2018 12:03:04 -0500 Received: from mail-wr1-f68.google.com ([209.85.221.68]:43746 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726197AbeLHRCY (ORCPT ); Sat, 8 Dec 2018 12:02:24 -0500 Received: by mail-wr1-f68.google.com with SMTP id r10so6540015wrs.10 for ; Sat, 08 Dec 2018 09:02:24 -0800 (PST) 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 :mime-version:content-transfer-encoding; bh=uYVwTFHfIdIF1mZV76OOxHqL8mAPwlcr24Pr/3Xy1IA=; b=HS9y9EVfzKeMOVbRIxLLfBnvq0rZL3W67pLPJ8NUfhzMZB3GBei6SgiXy3nuNR8Qdi 9zpbM8Tg8A+Uh7RvBSv7GsomS42qtpcc9TGa1re2lSgz82OCPWf2EHIoqctxkDUqGZlM ytUJ7QrgJqbyCGDBfiSuYqZieQzCsXl4uxH3g= 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:mime-version:content-transfer-encoding; bh=uYVwTFHfIdIF1mZV76OOxHqL8mAPwlcr24Pr/3Xy1IA=; b=pNeOkvTNmeoFPSZzpfGD3y7ZyrjMe3+B1kFF/cMbqDVyekORnAMS5MP5nFpI0C7emQ YQMbXb3X6kPHI0bqc/p+YhFkYT8CLvffiBwbIL0rwXtDz5KMPHV1JNovmwLLnXYLBrDC fZXpwv32MK2sM1vRtiXyBsafG0GcJdFYLi3MVQuxt+BXksyn0lnb9C0RIE+0i4LckXI1 UQD0ShmG0A84+cv+h0HWxyhegKDHLmZhaT9XlO2/jRkVBVTLLSdR5Ll2u9DUn78MagwE 3gKDuCkMax8N9sq9j2zsQgAXTUWB6c8pQ+3Rbs9hn/r6KnWfklrpLicbQlbhS2Pdj+wY +AfA== X-Gm-Message-State: AA+aEWalTVdmqhje/aa8SlLNqqU7a2X5edYtvuWzgprFV/lYkZP4CXaS f/RUxnOKkcXdFJwPx7LLIvYD0g== X-Google-Smtp-Source: AFSGD/V4FMoCY4qPEk1+ugBTTCKc3TSjhL8vXLabfRIMUbTMklVDXHZz9AYWIkK/R+qo1ZBvgkEKmA== X-Received: by 2002:adf:ef50:: with SMTP id c16mr5041589wrp.198.1544288543299; Sat, 08 Dec 2018 09:02:23 -0800 (PST) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id l20sm17411344wrb.93.2018.12.08.09.02.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 08 Dec 2018 09:02:22 -0800 (PST) From: Georgi Djakov To: gregkh@linuxfoundation.org, andy.gross@linaro.org, olof@lixom.net, arnd@arndb.de, linux-pm@vger.kernel.org Cc: rjw@rjwysocki.net, robh+dt@kernel.org, mturquette@baylibre.com, khilman@baylibre.com, vincent.guittot@linaro.org, skannan@codeaurora.org, bjorn.andersson@linaro.org, amit.kucheria@linaro.org, seansw@qti.qualcomm.com, daidavid1@codeaurora.org, evgreen@chromium.org, dianders@chromium.org, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, abailon@baylibre.com, maxime.ripard@bootlin.com, thierry.reding@gmail.com, ksitaraman@nvidia.com, sanjayc@nvidia.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, georgi.djakov@linaro.org Subject: [PATCH v12 2/7] dt-bindings: Introduce interconnect binding Date: Sat, 8 Dec 2018 19:02:11 +0200 Message-Id: <20181208170216.32555-3-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181208170216.32555-1-georgi.djakov@linaro.org> References: <20181208170216.32555-1-georgi.djakov@linaro.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This binding is intended to represent the relations between interconnect controllers (providers) and consumer device nodes. It will allow creating links between consumers and interconnect paths (exposed by interconnect providers). Reviewed-by: Evan Green Signed-off-by: Georgi Djakov Reviewed-by: Rob Herring --- .../bindings/interconnect/interconnect.txt | 60 +++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/interconnect/interconnect.txt diff --git a/Documentation/devicetree/bindings/interconnect/interconnect.txt b/Documentation/devicetree/bindings/interconnect/interconnect.txt new file mode 100644 index 000000000000..5a3c575b387a --- /dev/null +++ b/Documentation/devicetree/bindings/interconnect/interconnect.txt @@ -0,0 +1,60 @@ +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 use case. 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 compatible string +- #interconnect-cells : number of cells in a interconnect specifier needed to + encode the interconnect node id + +Example: + + snoc: interconnect@580000 { + compatible = "qcom,msm8916-snoc"; + #interconnect-cells = <1>; + reg = <0x580000 0x14000>; + clock-names = "bus_clk", "bus_a_clk"; + clocks = <&rpmcc RPM_SMD_SNOC_CLK>, + <&rpmcc RPM_SMD_SNOC_A_CLK>; + }; + + += interconnect consumers = + +The interconnect consumers are device nodes which dynamically express their +bandwidth requirements along interconnect paths they are connected to. There +can be multiple interconnect providers on a SoC and the consumer may consume +multiple paths from different providers depending on use case and the +components it has to interact with. + +Required properties: +interconnects : Pairs of phandles and interconnect provider specifier to denote + the edge source and destination ports of the interconnect path. + +Optional properties: +interconnect-names : List of interconnect path name strings sorted in the same + order as the interconnects property. Consumers drivers will use + interconnect-names to match interconnect paths with interconnect + specifier pairs. + +Example: + + sdhci@7864000 { + ... + interconnects = <&pnoc MASTER_SDCC_1 &bimc SLAVE_EBI_CH0>; + interconnect-names = "sdhc-mem"; + };