From patchwork Fri Dec 7 15:29:11 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 1009520 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b="TBlhCU+Q"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43BGcx0G2dz9s47 for ; Sat, 8 Dec 2018 02:30:25 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726172AbeLGPaV (ORCPT ); Fri, 7 Dec 2018 10:30:21 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:34962 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726141AbeLGP31 (ORCPT ); Fri, 7 Dec 2018 10:29:27 -0500 Received: by mail-wm1-f65.google.com with SMTP id c126so4923744wmh.0 for ; Fri, 07 Dec 2018 07:29:26 -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=RDj6MDHY8LfhaKzwZwR+xk+j8tl7N19Jf8vqoRp4O4Y=; b=TBlhCU+QpJs0e62CNtOmnH8EuDCbTs5nwf9+D/bWuRXOAo9kzw8a6XMrBcX3dGGkI1 5bTG0DSuPBGdxzgapoNVR7u1wFv3JcMiVdao6XFt2l92C1P7zeZRKzbGbZv5WIoWmBy/ EE/l87tIzCR1sK/TAmjJlY/lZCHjfAnc4RElo= 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=RDj6MDHY8LfhaKzwZwR+xk+j8tl7N19Jf8vqoRp4O4Y=; b=fJa8hHuvQwvIGT3X51LVKqPQckqOiZKhaS10fSIPdIuu5eHm/gqNdARnNjJJcdf9iO QxdRLDe9vaKP7rNpXq/HaY6YNiv59PP7Tt1AER+KCylEYQeud6JunrI68B3whN/YDfEu oCAYeQ681+sPimdBT2m6x8yOeY8vI27ooNgk3N4bbA8Yfwoa4ewCbCB238s5yPdOkiFl vSndFjU18WI7hINZfG9qrmgKS8t0KQHbXWm5vrtCoclR/oWkpVOCMkUPW/9OKej/XUj5 K9H9zXqR1MxgY8YHoBe9n9rDElmC0iPHYgg58SIpxDssiug8/gyjPsIFdg6dIXk4C7f8 XvgQ== X-Gm-Message-State: AA+aEWZgJ1JC5PuiheqryuKfyND+KtGU1CA/5YP7lpx5nyzGLCn3v7x7 jXlaG/Xf8Ex3E6tmTM49mFOcxQ== X-Google-Smtp-Source: AFSGD/Ug7EUJZLzyiClCy1tLMsG8DqVYJG/NjSUo2idfbtK0wz5sHnfXnQ893vEZzGfiOOpdxckpVQ== X-Received: by 2002:a1c:d08b:: with SMTP id h133mr2656724wmg.8.1544196565420; Fri, 07 Dec 2018 07:29:25 -0800 (PST) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id y145sm2728721wmd.30.2018.12.07.07.29.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 07 Dec 2018 07:29:24 -0800 (PST) From: Georgi Djakov To: gregkh@linuxfoundation.org, 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, arnd@arndb.de, 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 v11 2/8] dt-bindings: Introduce interconnect binding Date: Fri, 7 Dec 2018 17:29:11 +0200 Message-Id: <20181207152917.4862-3-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181207152917.4862-1-georgi.djakov@linaro.org> References: <20181207152917.4862-1-georgi.djakov@linaro.org> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This binding is intended to represent the relations between the 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 --- .../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..6775c07e1574 --- /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-ddr"; + };