From patchwork Wed Aug 7 22:31:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 11082783 X-Patchwork-Delegate: viresh.linux@gmail.com 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 E597114DB for ; Wed, 7 Aug 2019 22:31:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D746428A5C for ; Wed, 7 Aug 2019 22:31:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CB58C28ABA; Wed, 7 Aug 2019 22:31:23 +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 6A45228A5C for ; Wed, 7 Aug 2019 22:31:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389471AbfHGWbU (ORCPT ); Wed, 7 Aug 2019 18:31:20 -0400 Received: from mail-qk1-f202.google.com ([209.85.222.202]:42364 "EHLO mail-qk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389284AbfHGWbT (ORCPT ); Wed, 7 Aug 2019 18:31:19 -0400 Received: by mail-qk1-f202.google.com with SMTP id p18so7026011qke.9 for ; Wed, 07 Aug 2019 15:31:18 -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=ckpmb+TNBKBpyxo3hmHEyu4vxqKi6Nk6GzLW2/f2keU=; b=BSiqMpq6HoHNp0p49Nzkyt13lkHVX/6GuQpF8Kr8KnGBApx+sMX49a0LJvr8MGIUjS EdPDbkfgrECeizFLqhMGngAXCxcAZ0cTnWpnR65ROBYXP/G7QR3LGE2rbLw2Cra4ThiM 7rrCINPrbNFIOy+XrgB+T0lBNam/8Wac5k3l2IFjBBu8MdAwOmsgFSWKndSDyYHrO1Xh TtHur7MsUe0HOzKF/E4BPURvDt23OGElVYq5r9NgKsaDuiEsW3bR35MH3nXQTNGrTwwV sFaHapXc6X2Nv71ho23ujXWOM4Y10idK1WOQOJmoGP/BzLFZzboUCloJTqNyBnSILmLE VprQ== 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=ckpmb+TNBKBpyxo3hmHEyu4vxqKi6Nk6GzLW2/f2keU=; b=iuC5hj/DsPo1iJ2J9olIHFuIybgn/N+CB8J+Ziv894eBprnYwe+TqFM/F36oIVkAEI aW93/ut+xuaqdfQPSzVWqrc5JLtcNWc69tQaO8BN9wiiIblrer96wrJ1bFsWFKVfRUee zlh4+F0U9dzwpJzDC3Ll9RMV5KUTV0QqiBx6iBbpgjlwqwmQAEJEqJfwcSvUNb9IbGJ/ ymVhAEsdqilZqAVJ+a/+Qw2cRTtPQa1GBxGFuoR+Nn85CiOtMnGug3UWrQXWwAiGc6AO y7hHS8/A9jUTBcbmytzbR1f+CVTWsoD9IVOueBnzYxTdrO0Rq+dMA8ub8yKccZlCxSZv WMFg== X-Gm-Message-State: APjAAAXia0oEbKFYWS0u685637HAwWXGF4ATMxwvpoF3ufMIseGsKu7a oi3UsD8uZ7mZP2/JZT8m4yS2U+Ei3lh7zBs= X-Google-Smtp-Source: APXvYqxDhQTeMZ27YhUXhV335PAv5RzZgLceI6C81MqWo0wkCxeUetGuTCa6PoXaTHbL84zYlcM32MoiII/dMXk= X-Received: by 2002:a37:be87:: with SMTP id o129mr10537574qkf.31.1565217078090; Wed, 07 Aug 2019 15:31:18 -0700 (PDT) Date: Wed, 7 Aug 2019 15:31:09 -0700 In-Reply-To: <20190807223111.230846-1-saravanak@google.com> Message-Id: <20190807223111.230846-2-saravanak@google.com> Mime-Version: 1.0 References: <20190807223111.230846-1-saravanak@google.com> X-Mailer: git-send-email 2.23.0.rc1.153.gdeed80330f-goog Subject: [PATCH v5 1/3] dt-bindings: opp: Introduce opp-peak-kBps and opp-avg-kBps bindings From: Saravana Kannan To: Rob Herring , Mark Rutland , Viresh Kumar , Nishanth Menon , Stephen Boyd , "Rafael J. Wysocki" Cc: Saravana Kannan , Georgi Djakov , vincent.guittot@linaro.org, seansw@qti.qualcomm.com, daidavid1@codeaurora.org, adharmap@codeaurora.org, Rajendra Nayak , sibis@codeaurora.org, bjorn.andersson@linaro.org, evgreen@chromium.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 replaces 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 Reviewed-by: Rob Herring --- Documentation/devicetree/bindings/opp/opp.txt | 15 ++++++++++++--- .../devicetree/bindings/property-units.txt | 4 ++++ 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt index 68592271461f..dbad8eb6c746 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 except 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-kBps 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. diff --git a/Documentation/devicetree/bindings/property-units.txt b/Documentation/devicetree/bindings/property-units.txt index e9b8360b3288..c80a110c1e26 100644 --- a/Documentation/devicetree/bindings/property-units.txt +++ b/Documentation/devicetree/bindings/property-units.txt @@ -41,3 +41,7 @@ Temperature Pressure ---------------------------------------- -kpascal : kilopascal + +Throughput +---------------------------------------- +-kBps : kilobytes per second