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=-8.9 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 A147DC5B57D for ; Tue, 2 Jul 2019 23:46:25 +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 5C24E21BF6 for ; Tue, 2 Jul 2019 23:46:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Z0sqzDV5"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=googlemail.com header.i=@googlemail.com header.b="fqxKgFLt" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5C24E21BF6 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=googlemail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-amlogic-bounces+linux-amlogic=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:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/cwcPXtdL/bd7rummPjZ8mQWSCs9HrpqhuPgVHJ95bU=; b=Z0sqzDV5GnLa/s E+DwMK6yHJJVTYJPVFZG2VKmrjTUJ21QSgBa4KR0Vn0F1Khu1Z5FAjJwGsKRyOyaPpB60J1wfRBQJ CvQFT0IBThFuPXN2Z1as5dlrVPAjJhTJx0KAGtnts0ITSETxCm9e3SiMM2arBV8fyDtpYX5U8T7db yoFOzDYOrmSVY/Mz4DMofu/ExDKqAS5KmduYTOyfAZhDs5KNdhpwPf5k9eEoU1BPbn504RtT/gmfS Lwn2W1oxxJX2yvAhQkqd+XjQNxocn5tCQxU1Al2wE7/Acrc/dZeMVI9atGNCAOWrGDhDg/XFA3+EI MTT9j86YNOpAG/Vvrr/g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hiSTc-0004wi-QT; Tue, 02 Jul 2019 23:46:20 +0000 Received: from mail-oi1-x241.google.com ([2607:f8b0:4864:20::241]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hiSTO-0004lx-OW; Tue, 02 Jul 2019 23:46:08 +0000 Received: by mail-oi1-x241.google.com with SMTP id w196so477648oie.7; Tue, 02 Jul 2019 16:46:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=gOTP+ZaLmXyKKyNKXioW6RTool5zGcTlIioWS0XWh/0=; b=fqxKgFLtXz/y3i1XJccpf1r8OEVcFBvDBBeD+u/RiosA2OQeo7s6BpIY9TIOjicG9c U88HeaU0Ng/LvQaa8nO7Gv/JnfcgGSSbkhzU8g/92RM2NjgO3h9s93BEqVr5Qr1zjrJn q8ByxOhcpNXhfQxpSYR7QsG1SFw4oiONM3xTXEzkZd7PzfxXzh9qX2lSVWFXnfOz/fkW SD+bw1p0PshSoyG7jMoVbs8WZ8s5ChDT2fsDrlSnwDQIQXgHwaaEi7YP+Qh193HO4HnN +u5d9y8u8Ts7K9Nz5GDSvMbTMW7SOHnXfA6JoMcS0/s3jyH3GK/7PJZWH81Bzzk8dQK/ OvpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=gOTP+ZaLmXyKKyNKXioW6RTool5zGcTlIioWS0XWh/0=; b=U5UT2N2MKU5T1dXZb92VtWTNSdF99cqD4Cni73rJaGjF48UjQHyhiJEgNdG5CoPeyH xtwewKug6YCFzaCZL8chz5jF8Oj5iOos2QNPkf1Tfw62ojQl73czPHGa6Zhj8lqkeOgu tixjP89fZUPrwKW1CNNFfXO5DXK+l6EkjKyQWUddqUqKp9bEvyT1iSXRkXjJLNbBU+ww XWb469MfVMH00biFBvgg6kFjyVqUoq3Mg2iXDIVweWAHyEWMZzn2Y9qCG3DWhnxtW3T/ 65R7Bd5hiuwyi6vTTjxhYhlxokjWqezhHe/Sox/3uwBfbJ+H7OLTGC362grRmZJoftd3 cjUw== X-Gm-Message-State: APjAAAWxBk7fo2dQFVOtRRThYuJqpDytbHg3jHO6PFTX5cIjN8idxwxy PjkY9r9Eyu0r3zPQItnHbxaqP9Jl00mKauS+Nxg= X-Google-Smtp-Source: APXvYqwD5pAmB4x2ApOe+c2vc+d9pRDSp0daWsi8O5RWBkaiMnmqlFRjUobb+dXGUccoH7FswIqUb6z3GneFdMYr2Qw= X-Received: by 2002:a05:6808:8f0:: with SMTP id d16mr1528711oic.47.1562111165901; Tue, 02 Jul 2019 16:46:05 -0700 (PDT) MIME-Version: 1.0 References: <20190701091258.3870-1-narmstrong@baylibre.com> <20190701091258.3870-15-narmstrong@baylibre.com> In-Reply-To: <20190701091258.3870-15-narmstrong@baylibre.com> From: Martin Blumenstingl Date: Wed, 3 Jul 2019 01:45:55 +0200 Message-ID: Subject: Re: [RFC/RFT v3 14/14] arm64: dts: meson-g12b-odroid-n2: enable DVFS To: Neil Armstrong X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190702_164606_803294_391DF1EE X-CRM114-Status: UNSURE ( 9.66 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: khilman@baylibre.com, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jbrunet@baylibre.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On Mon, Jul 1, 2019 at 11:13 AM Neil Armstrong wrote: > > Enable DVFS for the Odroid-N2 by setting the clock, OPP and supply > for each cores of each CPU clusters. > > The first cluster uses the "VDDCPU_B" power supply, and the second > cluster uses the "VDDCPU_A" power supply. > > Each power supply can achieve 0.73V to 1.01V using 2 distinct PWM > outputs clocked at 800KHz with an inverse duty-cycle. > > DVFS has been tested by running the arm64 cpuburn at [1] and cycling > between all the possible cpufreq translations of each cluster and > checking the final frequency using the clock-measurer, script at [2]. > > [1] https://github.com/ssvb/cpuburn-arm/blob/master/cpuburn-a53.S > [2] https://gist.github.com/superna9999/d4de964dbc0f84b7d527e1df2ddea25f > > Signed-off-by: Neil Armstrong Reviewed-by: Martin Blumenstingl [...] > + vddcpu_b: regulator-vddcpu-b { > + /* > + * Silergy SY8120B1ABC Regulator. > + */ interesting that they use different regulator ICs for CPU A and CPU B the public schematics confirm your comments _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic