From patchwork Fri Jun 14 04:17:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 10994285 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 E926E14E5 for ; Fri, 14 Jun 2019 04:18:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA89D27B81 for ; Fri, 14 Jun 2019 04:18:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CE50927D0E; Fri, 14 Jun 2019 04:18:30 +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=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham 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 6F30527B81 for ; Fri, 14 Jun 2019 04:18:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726185AbfFNERw (ORCPT ); Fri, 14 Jun 2019 00:17:52 -0400 Received: from mail-oi1-f202.google.com ([209.85.167.202]:33941 "EHLO mail-oi1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726108AbfFNERv (ORCPT ); Fri, 14 Jun 2019 00:17:51 -0400 Received: by mail-oi1-f202.google.com with SMTP id i16so402461oie.1 for ; Thu, 13 Jun 2019 21:17:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=yAz3k7OzPjxwzR5iBZENxEm1ewgrxin9ITMqtF0yTXk=; b=B7prBGnC/4Vibzh1aRMKAwrh4wPptRavvQYdcbMm4wH18w6FJ+mN2XrQWOTokqNNE1 2YQEPr15HP9wSksf1WcGXsHnVfqqqegk1AI4eEiroIavNFnRETAd2J8oE0N+RDr4nh6n AmmAr7cJQDsTXFqCR3AJrrk/CmgU6adsljmLmVCSPy0Y0sYMKMcgVM3kHNlj+tUdSMD/ BPjdbxJNKW2RflGqJzrpzuZ7sMm8HwAor8bGvpDaFEBr23p78S/TZxhHyFUjGMyT61Ng WGTkhSqWIQLHWc8uOIJGFcDV9ynqnhDOGqTgQwDVWczkizWy5FMQN2ha/gtdILPLq3uB rbJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=yAz3k7OzPjxwzR5iBZENxEm1ewgrxin9ITMqtF0yTXk=; b=fVC9G/wwYgVkfRAqO9RkLnMxV0sfF/ZpKT/gV52PqP2YmNd4YHPbX1Vm4Mt5jSGVJp ZCt6MoYe6Uja4rsGXRSno9P5CYCfzQwns8RTz7JPfqZ2F2R+54yXIkp7XDFR80tr6CZp NqOhny2QlcgfDIrLy4SZoBuHJWUiD+aAmt9oycqsEQcDwzuIm8zW8VCYCcGQy76YGNmA HxLeuKipWZMBDvYBG+nW+k5JO2oxx54au6y30l0mVsPH+wfAaLRRKy0bUPGE3m8RUtAh KgeyuNNkTQY+R+6k6/hbuWy+XTZlsaB1tzvOL30C9lPXQO3Wiq+fb232IJd6INvU84Yo djxw== X-Gm-Message-State: APjAAAVGaUe2+gXRH7fN4dqHDAOthHlOUx42ylUiX0Oe9YUtT4IITIyN AqOxH5HnzbReRruIfFWfrm3O8VwyzEcXjLs= X-Google-Smtp-Source: APXvYqxpQN0vGQmlYfHsDs37QAiaPht93jr4MuA/NrskO8HXbTJIyWknXV3GfSjQiUsAjTLL2awJ0YqhP7X0mIc= X-Received: by 2002:aca:b8d7:: with SMTP id i206mr618247oif.25.1560485870342; Thu, 13 Jun 2019 21:17:50 -0700 (PDT) Date: Thu, 13 Jun 2019 21:17:26 -0700 In-Reply-To: <20190614041733.120807-1-saravanak@google.com> Message-Id: <20190614041733.120807-5-saravanak@google.com> Mime-Version: 1.0 References: <20190614041733.120807-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.rc2.383.gf4fbbf30c2-goog Subject: [PATCH v2 04/11] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings From: Saravana Kannan To: Georgi Djakov , Rob Herring , Mark Rutland , Viresh Kumar , Nishanth Menon , Stephen Boyd , "Rafael J. Wysocki" , MyungJoo Ham , Kyungmin Park , Chanwoo Choi Cc: Saravana Kannan , Rajendra Nayak , Jordan Crouse , vincent.guittot@linaro.org, bjorn.andersson@linaro.org, amit.kucheria@linaro.org, seansw@qti.qualcomm.com, daidavid1@codeaurora.org, evgreen@chromium.org, sibis@codeaurora.org, kernel-team@android.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Interconnects often quantify their performance points in terms of bandwidth. So, add opp-peak-KBps (required) and opp-avg-KBps (optional) to allow specifying Bandwidth OPP tables in DT. opp-peak-KBps is a required property that replace opp-hz for Bandwidth OPP tables. opp-avg-KBps is an optional property that can be used in Bandwidth OPP tables. Signed-off-by: Saravana Kannan --- Documentation/devicetree/bindings/opp/opp.txt | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt index 76b6c79604a5..c869e87caa2a 100644 --- a/Documentation/devicetree/bindings/opp/opp.txt +++ b/Documentation/devicetree/bindings/opp/opp.txt @@ -83,9 +83,14 @@ properties. Required properties: - opp-hz: Frequency in Hz, expressed as a 64-bit big-endian integer. This is a - required property for all device nodes but devices like power domains. The - power domain nodes must have another (implementation dependent) property which - uniquely identifies the OPP nodes. + required property for all device nodes but for devices like power domains or + bandwidth opp tables. The power domain nodes must have another (implementation + dependent) property which uniquely identifies the OPP nodes. The interconnect + opps are required to have the opp-peak-bw property. + +- opp-peak-KBps: Peak bandwidth in kilobytes per second, expressed as a 32-bit + big-endian integer. This is a required property for all devices that don't + have opp-hz. For example, bandwidth OPP tables for interconnect paths. Optional properties: - opp-microvolt: voltage in micro Volts. @@ -132,6 +137,10 @@ Optional properties: - opp-level: A value representing the performance level of the device, expressed as a 32-bit integer. +- opp-avg-KBps: Average bandwidth in kilobytes per second, expressed as a + 32-bit big-endian integer. This property is only meaningful in OPP tables + where opp-peak-KBps is present. + - clock-latency-ns: Specifies the maximum possible transition latency (in nanoseconds) for switching to this OPP from any other OPP.