From patchwork Wed Jul 3 01:10:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 11028813 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 3407E14F6 for ; Wed, 3 Jul 2019 01:10:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 30C1D2883F for ; Wed, 3 Jul 2019 01:10:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2411428949; Wed, 3 Jul 2019 01:10:56 +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 B8F572883F for ; Wed, 3 Jul 2019 01:10:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727400AbfGCBK3 (ORCPT ); Tue, 2 Jul 2019 21:10:29 -0400 Received: from mail-pf1-f201.google.com ([209.85.210.201]:44685 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727355AbfGCBK2 (ORCPT ); Tue, 2 Jul 2019 21:10:28 -0400 Received: by mail-pf1-f201.google.com with SMTP id j22so394298pfe.11 for ; Tue, 02 Jul 2019 18:10:28 -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=e9kTi24uB4qma1DS6GLfEd66OjyUuGvajWKOikD47Aw=; b=Gke0wMis6E54EMbeMX51d1b4DLg3NQl068tRf9JRRwoyEiiec/5boft2FQO/E182cW uoGbqSDHrEW0BfxIj4OxChLfIrwGIcJ/IziKnOHCXvLp36E4FOuiR10Gfrexqp83BIBG k2KWFMwUE5pztZQsHB5U1kpLIQ636P5rYZ+iSo+I1q4LGS+u8VlCzht1pOUpr28+RacL 3bsNezsZYmq9SdcXbeVtcyMwZ6w5XuvSEam+c0LGKZUBTAfwag33F2ozP7CmvpZoAa3l 8v6gShBaUpRw04xZAmgd8KpxH8XqQ+yC9ZD31FLirq2K0FjF661IsWc8zLppc9P5nWsx zIfw== 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=e9kTi24uB4qma1DS6GLfEd66OjyUuGvajWKOikD47Aw=; b=PO5+dNbjk/1v4DpFQuNDEbxAU24RLhB4SreLgwPfTFHeDbhuzkWtQjHhx64SnMX8BQ GjkUtrIveecF+qrd5FcRc/w9aD5HZJhpPEEhJtjAkF/+HN8of5sqp92fDVz1J244kzX3 dCXQEBToNgjSvtPNJMQ5sJagPrk4t/qbrtCrZhzC9TpeCDkgH15MPppQVlT3cN3Qh36S LcnUoC14Z9MOCkHytFX816RdVyvY5WNsABN7mCW/ZdUv5f4vVhvVt7bmMBQ8P6tTSV2Y EwGh+bJ8iYFzn2R4Acakxc7eBgo0iyFq3/5bBmk6Y4oC6tnKnKksUrmr780V8W2sIv/I vBKQ== X-Gm-Message-State: APjAAAXfRS7yRmSEbHiF1efiiSTY4yM6zlX7d2fW7yW46kD+UGNan29r pmL/DYrxX5Spr7RDGSBMf3EIuRmI9Cx0Uas= X-Google-Smtp-Source: APXvYqyhZ6ewKAXFIwQJJhA1AgdyM3RtUJbdz/u8xIi1sWGVsqHDJ1zCwj5Y4C/wLIAnD3LEbng6V6B5cGYzL9Y= X-Received: by 2002:a63:6ec4:: with SMTP id j187mr15725095pgc.420.1562116227470; Tue, 02 Jul 2019 18:10:27 -0700 (PDT) Date: Tue, 2 Jul 2019 18:10:15 -0700 In-Reply-To: <20190703011020.151615-1-saravanak@google.com> Message-Id: <20190703011020.151615-2-saravanak@google.com> Mime-Version: 1.0 References: <20190703011020.151615-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v3 1/6] 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" Cc: Saravana Kannan , vincent.guittot@linaro.org, seansw@qti.qualcomm.com, daidavid1@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 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.