From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D98C9C49ED7 for ; Fri, 13 Sep 2019 10:23:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A9262208C2 for ; Fri, 13 Sep 2019 10:23:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pC9qvIuc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A9262208C2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=4XakvrVFZnNZ08tyI4VMXrhLqOShNQwPa4AhKK8jj1g=; b=pC9qvIuczFLKHq 1Bp3FOHOQ5mdZbw5PTocNSw09drrIYMEub7cwm4wCmvXzntMOhmuxVf5bxDhhlOeREUkjubNGEDOH 1ONe07hbgBfqqn5yPFPWUIDbDpm5rzC+qA/lRsPHZaM68fgMResFTtjk1x2m76rtYAW7kYrio7pqz 4vvlsKxPCsxy6WEpvfyY8y9bJjd+IGhP9NW3ksgfIoSLgUAymJkQdxXVTv+PvJVLnPI0Ux9q7UJbT v9aOLz5CaFzuz05zDC8BgeLJXpserbQP/aOkkyWO4Y8mj/hs3Z1IB2G7JivBIGcrgeJUxE4WupV5R qMWi+U2eaSt1tzzlsulA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1i8ijP-0005BF-7z; Fri, 13 Sep 2019 10:23:11 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1i8ijM-0005Aw-Bj for linux-arm-kernel@lists.infradead.org; Fri, 13 Sep 2019 10:23:09 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 13B3528; Fri, 13 Sep 2019 03:23:07 -0700 (PDT) Received: from bogus (e107155-lin.cambridge.arm.com [10.1.196.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7CCFA3F59C; Fri, 13 Sep 2019 03:23:06 -0700 (PDT) Date: Fri, 13 Sep 2019 11:23:04 +0100 From: Sudeep Holla To: Sujeet Kumar Baranwal Subject: Re: SCMI & Devfreq Message-ID: <20190913102304.GC2559@bogus> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190913_032308_441533_E74E214A X-CRM114-Status: GOOD ( 11.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Sudeep Holla Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Sep 12, 2019 at 06:55:36PM +0000, Sujeet Kumar Baranwal wrote: > Hi, > > I am a recent adopter of SCMI protocol on marvell processors and has been > able to use cpufreq governor using scmi-cpufreq frame work to change CPU > frequency. > Good, but just a quick question to check if this is ACPI or DT based platform ? That matter a lot to answer you query. > While SCMI_PERFORMANCE_PROTOCL allows multiple "domains" to be created, each > domain representing one clock with several OPPs, it works well. OK > For sysfs command like "cat > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor". I don't understand the context of above statement. > I am trying to find how SCMI could help in similar facilities when it comes > to devfreq for device specific OPP variation. Yes it needs some work and I do have some prototype, but with no users in the upstream, I haven't added it yet. > If someone did similar work done or doing, please enlighten me too. > What kind of devices are these ? There was some work around generic devfreq driver that I had seen on the list and my plan was to do something similar, I need to dig up details as it was while ago. -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel