From patchwork Wed Jan 16 16:10:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 1025998 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@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=linux-tegra-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="Bz6AnpAO"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43fsdZ5vYnz9sD9 for ; Thu, 17 Jan 2019 03:11:14 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727215AbfAPQLN (ORCPT ); Wed, 16 Jan 2019 11:11:13 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:53744 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405186AbfAPQLN (ORCPT ); Wed, 16 Jan 2019 11:11:13 -0500 Received: by mail-wm1-f66.google.com with SMTP id d15so2584616wmb.3 for ; Wed, 16 Jan 2019 08:11:12 -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=Zq2oMbbyivDSUeOMLU6UgVaZMPHzfeEtdH+iJhaQzFI=; b=Bz6AnpAOC1LWp7HIBwDPW+c8rI8rUIahEAzNe0cf4f9UbL5QjWiz+9EPB6M8Nomzlh oaHmJRLfPCL9PHQSBM4L1e4f9TLFbjrjJ5tOTWBpDhIWOBhONvm1Y4f1pdYJZBm1cCCg KNQiq/we5MfhtJ2paVJvkrEDQx1ztjjFkjxHg= 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=Zq2oMbbyivDSUeOMLU6UgVaZMPHzfeEtdH+iJhaQzFI=; b=gQTzsvMyVYsOMMR6n8aLMFaMroW/60TnLaSiPB8YT1Elr1/6ePf1njPDea4HO9YTrB t2uEeQH0XP4vIfPVbH56tRuYNryHs/jsiEU+y+ypSOFYKvDBB1sH7OzVEBKCBm6TYZ+M ZRes2pKWnXh9+mKPN3haCZJlFxEcYEPhxN0ngnfkCx5P7siLg4miNcaZeZGNpONMAXgk YlpnTlgnF586m6BOujR3a2/VZwT2sI1wMn8NvBli3J9MRhzofkuCzKazBuEhiTyE5Od8 sUPJ1HswGZ8omk8bE8DIvIvdYPTlihHFV0MS4SyYfhN+NVxDXaBu9y/scVZJxsKLMq0M pFVg== X-Gm-Message-State: AJcUuke7JRGQ3aaAYDKP58szgUXWY4/vUcKsaWoO+EK40AW0K0oOqTJB BZNA5RPVdyUfBuDdOuqjzjDOcQ== X-Google-Smtp-Source: ALg8bN4Cf46ZL1gy7/zlADr5kz6Lry7MyVxWtkfDt83Hljxxs3bH3mOcohe+U1Tkugq4psB8bi4ACw== X-Received: by 2002:a1c:d1cd:: with SMTP id i196mr7978630wmg.107.1547655071506; Wed, 16 Jan 2019 08:11:11 -0800 (PST) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id a17sm78193407wrs.58.2019.01.16.08.11.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 16 Jan 2019 08:11:10 -0800 (PST) From: Georgi Djakov To: gregkh@linuxfoundation.org Cc: andy.gross@linaro.org, olof@lixom.net, arnd@arndb.de, 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, abailon@baylibre.com, maxime.ripard@bootlin.com, thierry.reding@gmail.com, ksitaraman@nvidia.com, sanjayc@nvidia.com, henryc.chen@mediatek.com, linux-pm@vger.kernel.org, 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, linux-mediatek@lists.infradead.org, georgi.djakov@linaro.org Subject: [PATCH v13 2/8] dt-bindings: Introduce interconnect binding Date: Wed, 16 Jan 2019 18:10:57 +0200 Message-Id: <20190116161103.6937-3-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190116161103.6937-1-georgi.djakov@linaro.org> References: <20190116161103.6937-1-georgi.djakov@linaro.org> MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org 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 Reviewed-by: Rob Herring 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..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"; + };