From patchwork Fri Jul 26 23:15:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 11061995 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 447E3912 for ; Fri, 26 Jul 2019 23:16:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 386A728AEF for ; Fri, 26 Jul 2019 23:16:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 295DA2886C; Fri, 26 Jul 2019 23:16:17 +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 A895C2886C for ; Fri, 26 Jul 2019 23:16:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387500AbfGZXQM (ORCPT ); Fri, 26 Jul 2019 19:16:12 -0400 Received: from mail-pl1-f202.google.com ([209.85.214.202]:35893 "EHLO mail-pl1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387490AbfGZXQL (ORCPT ); Fri, 26 Jul 2019 19:16:11 -0400 Received: by mail-pl1-f202.google.com with SMTP id a5so29310470pla.3 for ; Fri, 26 Jul 2019 16:16:11 -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=T5820OQQJWp4mkgZ4wnYqdAO7VH4vOloLaIe1pVCzGw=; b=rDRdRt1bV5MKFBrQ5Vd/g9xRQEItk/yUTt63T3VAu7uVPL36GV1YsP8TrEfApHh+I/ 8bbXL0HHxWc22P7SJCdgHB37BXtOuvrmLVVdFhTs9g4WwVF5r4kkPGcAt3HvF1+moaUj AwvhyzbnGzr3w0LAodKf+WzNgW6GdxboES8/O+vahxIqabu5k3uT3vhMj+LO6twVi5wc a3GSBaZN+VAKQfJIsmlTui5z8KFOr6Xz8DsB5vPuK8l9/IJFxWGnz52ZxLQgsjz6e9Zh xRpBdWT1yrSApQhHHbg/QceFEAInyPa+alLPWEBITCYKzy2EVY7851E8imHAiTa1MnVO 7nMA== 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=T5820OQQJWp4mkgZ4wnYqdAO7VH4vOloLaIe1pVCzGw=; b=HuJNvJ7FL0OqU+w/WFVmhlETJoVU0Nj0QQRmZSq3KE7UqwZh9GBVR13fdyAuGmzGOD 7dfKaJ3J/PkEB6lKpQIhWgYdD3Owkr5HJzTCmvp+AZmY6Nigs2NwvnUy/UB9jcl0OmzD KDCPJfSbxd1Qnk0StpIRnzm3w7ty3TPGvc36mGGPeuN5a49AawWncNjWZfxro+YUbUwr 0VGTtjZYSO8WB3D/mSphuHfeyCMKO0fWp5n+r3smWh889r5se/7eoRT9aVW9fFfHtAcQ lnbyrrzQXt/Ah/2PFd3DSVxk0KzbywcXRPDScukxRJs670yiCKbUVSVOUJdwLj/gLmbY tGzw== X-Gm-Message-State: APjAAAVBhNOXyu5g+OuzGAQTiVkvFcgGzEpULM+auFCub3IxXv+xaJoS 9udTuiWiN2EURLWgq+gYN6EySz4ImBTb5Ow= X-Google-Smtp-Source: APXvYqxvxCZ+h9e26rxDg8g/fbMxJWTK7jGlZs1GjHC9J00BqtPAYG3+n9U0MLf3JudpR+bNpSlJ2Y8Og3j2Btw= X-Received: by 2002:a63:520f:: with SMTP id g15mr89389221pgb.28.1564182970293; Fri, 26 Jul 2019 16:16:10 -0700 (PDT) Date: Fri, 26 Jul 2019 16:15:56 -0700 In-Reply-To: <20190726231558.175130-1-saravanak@google.com> Message-Id: <20190726231558.175130-3-saravanak@google.com> Mime-Version: 1.0 References: <20190726231558.175130-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.709.g102302147b-goog Subject: [PATCH v4 2/3] OPP: Add support for bandwidth OPP tables 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 Not all devices quantify their performance points in terms of frequency. Devices like interconnects quantify their performance points in terms of bandwidth. We need a way to represent these bandwidth levels in OPP. So, add support for parsing bandwidth OPPs from DT. Signed-off-by: Saravana Kannan --- drivers/opp/of.c | 41 ++++++++++++++++++++++++++++++++--------- drivers/opp/opp.h | 4 +++- 2 files changed, 35 insertions(+), 10 deletions(-) diff --git a/drivers/opp/of.c b/drivers/opp/of.c index b313aca9894f..ac73512f4416 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -523,6 +523,35 @@ void dev_pm_opp_of_remove_table(struct device *dev) } EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table); +static int _read_opp_key(struct dev_pm_opp *new_opp, struct device_node *np) +{ + int ret; + u64 rate; + u32 bw; + + ret = of_property_read_u64(np, "opp-hz", &rate); + if (!ret) { + /* + * Rate is defined as an unsigned long in clk API, and so + * casting explicitly to its type. Must be fixed once rate is 64 + * bit guaranteed in clk API. + */ + new_opp->rate = (unsigned long)rate; + return 0; + } + + ret = of_property_read_u32(np, "opp-peak-KBps", &bw); + if (ret) + return ret; + new_opp->rate = (unsigned long) bw; + + ret = of_property_read_u32(np, "opp-avg-KBps", &bw); + if (!ret) + new_opp->avg_bw = (unsigned long) bw; + + return 0; +} + /** * _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings) * @opp_table: OPP table @@ -560,22 +589,16 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table, if (!new_opp) return ERR_PTR(-ENOMEM); - ret = of_property_read_u64(np, "opp-hz", &rate); + ret = _read_opp_key(new_opp, np); if (ret < 0) { /* "opp-hz" is optional for devices like power domains. */ if (!opp_table->is_genpd) { - dev_err(dev, "%s: opp-hz not found\n", __func__); + dev_err(dev, "%s: opp-hz or opp-peak-bw not found\n", + __func__); goto free_opp; } rate_not_available = true; - } else { - /* - * Rate is defined as an unsigned long in clk API, and so - * casting explicitly to its type. Must be fixed once rate is 64 - * bit guaranteed in clk API. - */ - new_opp->rate = (unsigned long)rate; } of_property_read_u32(np, "opp-level", &new_opp->level); diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h index 01a500e2c40a..6bb238af9cac 100644 --- a/drivers/opp/opp.h +++ b/drivers/opp/opp.h @@ -56,7 +56,8 @@ extern struct list_head opp_tables; * @turbo: true if turbo (boost) OPP * @suspend: true if suspend OPP * @pstate: Device's power domain's performance state. - * @rate: Frequency in hertz + * @rate: Frequency in hertz OR Peak bandwidth in kilobytes per second + * @avg_bw: Average bandwidth in kilobytes per second * @level: Performance level * @supplies: Power supplies voltage/current values * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's @@ -78,6 +79,7 @@ struct dev_pm_opp { bool suspend; unsigned int pstate; unsigned long rate; + unsigned long avg_bw; unsigned int level; struct dev_pm_opp_supply *supplies;