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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3456DC433FE for ; Thu, 5 May 2022 08:41:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349932AbiEEIpd (ORCPT ); Thu, 5 May 2022 04:45:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56874 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232818AbiEEIpb (ORCPT ); Thu, 5 May 2022 04:45:31 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF17E49F8C; Thu, 5 May 2022 01:41:52 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: kholk11) with ESMTPSA id EA1B11F41053 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1651740111; bh=/QeZ5vMr5HKTzS4nnc319BmT5r9JF4pfYQjq6kNPoOE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=H7GjKQm0tpa2/3pSsk5EGKWYdgv+In5yZAveILwiE6K5rA4yrAqG9Rj4hIFKuAo6V eezcCF+lfVm/9WJak5nUmDJM7ZSbQm9RYLS6CQ/ws1nLk0BJmMinmKpKdkfPMuU2da OrTUYRAmF39kan7DMHJbGd9J4yvHaWKfmBKZ0Qo5upAeLI1unSBRY6xS7W74/H+yyV uA6npuFaiLvjC9ujvkEWi/FyqcEnN6eNbri3Qgc2UvHSi0r1qVwNngb2yckVCiDBb/ puY8qRD9oqY3uANsEHzkWuBrZtswj0zjjQDtE9lVWSYyYTwG7dPqyytCIliydTBqOH xeNN0y34Gbl2g== Message-ID: <5d532a9c-8227-610c-d0ae-9352b91b42e5@collabora.com> Date: Thu, 5 May 2022 10:41:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH v5 1/9] dt-bindings: cpufreq: mediatek: Add MediaTek CCI property Content-Language: en-US To: Rex-BC Chen , rafael@kernel.org, viresh.kumar@linaro.org, robh+dt@kernel.org, krzk+dt@kernel.org, matthias.bgg@gmail.com Cc: jia-wei.chang@mediatek.com, roger.lu@mediatek.com, hsinyi@google.com, khilman@baylibre.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com References: <20220504130540.5902-1-rex-bc.chen@mediatek.com> <20220504130540.5902-2-rex-bc.chen@mediatek.com> From: AngeloGioacchino Del Regno In-Reply-To: <20220504130540.5902-2-rex-bc.chen@mediatek.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Il 04/05/22 15:05, Rex-BC Chen ha scritto: > MediaTek Cache Coherent Interconnect (CCI) uses software devfreq module > for scaling clock frequency and adjust voltage. > The phandle could be linked between CPU and MediaTek CCI for some > MediaTek SoCs, like MT8183 and MT8186. > > The reason we need the link status between cpufreq and MediaTek cci is > cpufreq and mediatek cci could share the same regulator in some MediaTek > SoCs. Therefore, to prevent the issue of high frequency and low voltage, > we need to use this to make sure mediatek cci is ready. > > Signed-off-by: Rex-BC Chen Reviewed-by: AngeloGioacchino Del Regno