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 C3BCCC4332F for ; Tue, 13 Dec 2022 11:26:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234491AbiLML0c (ORCPT ); Tue, 13 Dec 2022 06:26:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60470 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235371AbiLMLZz (ORCPT ); Tue, 13 Dec 2022 06:25:55 -0500 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7FA991D662; Tue, 13 Dec 2022 03:25:19 -0800 (PST) Received: from [192.168.1.100] (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id AE3A2660036A; Tue, 13 Dec 2022 11:25:17 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1670930718; bh=jGEJaC2HHzi3pPy3yaMxUlfwN0oxrlQhb5r/NizcXZo=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=nO0m+xHZBDmaCWKxPnPPm9BOanyUTdwPiXhZ6stPQ2SjHsiGPoA1YGpY2HMeio5qQ 119yMkqN0eMSgwqPQu+G7DNPNkzu96nipC/xXUdpoAgpgAHTcXQr2hvRdSe1Eey7qh vJbdMjguGdLWlvtpR392ftEErTIRzrGNbsGbroCaEwr56Y/XTMTXvfvLvI4VZN/jn2 +16ucP6YtMQnjeVZdqb7cToIS7RPrRSj/6aPncm2sflcCdCz6fNlSXRC1hr+NsPSdX MAQobd3w1silOk2ka/doS0pLzSDsR+gM8Z02XEXwIjfnD2kuTPuydJDKu9W5Ksa6V/ S85bU55zdrogA== Message-ID: <4e73921f-c8c1-7943-72a7-a95b20a68bbf@collabora.com> Date: Tue, 13 Dec 2022 12:25:14 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.1 Subject: Re: [PATCH 2/4] arm64: dts: mediatek: mt8192: Fix systimer 13 MHz clock description Content-Language: en-US To: Chen-Yu Tsai , Matthias Brugger Cc: Rob Herring , Krzysztof Kozlowski , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, =?UTF-8?Q?N=c3=adcolas_F_=2e_R_=2e_A_=2e_Prado?= References: <20221201084229.3464449-1-wenst@chromium.org> <20221201084229.3464449-3-wenst@chromium.org> From: AngeloGioacchino Del Regno In-Reply-To: <20221201084229.3464449-3-wenst@chromium.org> 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 01/12/22 09:42, Chen-Yu Tsai ha scritto: > The systimer block derives its 13 MHz clock by dividing the main 26 MHz > oscillator clock by 2 internally, not through the TOPCKGEN clock > controller. > > On the MT8192 this divider is fixed to /2 and is not configurable. > > Making the systimer block take the 26 MHz clock directly requires > changing the implementations. As an ABI compatible fix, change the > input clock of the systimer block a fixed factor divide-by-2 clock > that takes the 26 MHz oscillator as its input. > > Fixes: 48489980e27e ("arm64: dts: Add Mediatek SoC MT8192 and evaluation board dts and Makefile") > Signed-off-by: Chen-Yu Tsai Reviewed-by: AngeloGioacchino Del Regno