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 5330FC433FE for ; Mon, 6 Dec 2021 16:13:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1386339AbhLFQRA (ORCPT ); Mon, 6 Dec 2021 11:17:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359046AbhLFQQ1 (ORCPT ); Mon, 6 Dec 2021 11:16:27 -0500 Received: from smtp.domeneshop.no (smtp.domeneshop.no [IPv6:2a01:5b40:0:3005::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9C4DC02B766; Mon, 6 Dec 2021 08:02:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tronnes.org ; s=ds202012; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:From: References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=GQst4t/4LdWSVVcCrm8SH8Vn8HARUfxxGSM3TziIqtg=; b=TlbdtDbZXaqHvM5WwxDFaOJnMe bum/P9yHE+wMNvtWFA0vau3/uepcq6HBt5JPOESm0MIkFSvegyZQtzAPyyuRyOW6kHDf9Az7Ekuqa FVhvq7/lBDhcRV8BIlz9lDjTvlAXMPsiV0RfruSDiH9TXdDJxcELBf+306+OlNR5gvgp756kgkr/z KBbc26G+M0O5S7FGDqJas/PNYylxKOySRSygWkbteDR5XD8qJ/yt6G93pNPK/las7bTQNPerU+jAd HkOrEv20TiH4PYJSsrPtaHzDZI2Db7nID95jWsLUqfw/hsvXV8i6F47f9D6d+II4gxaz2knXzjK7+ Whk8igMw==; Received: from 211.81-166-168.customer.lyse.net ([81.166.168.211]:64292 helo=[192.168.10.61]) by smtp.domeneshop.no with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1muGRV-0007xK-E9; Mon, 06 Dec 2021 17:02:17 +0100 Message-ID: <6add71c8-3685-38dd-08a7-dd95c149d2be@tronnes.org> Date: Mon, 6 Dec 2021 17:02:13 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.3.1 Subject: Re: [PATCH 3/6] dt-bindings: display: sitronix,st7735r: Remove spi-max-frequency limit To: David Lechner , robh+dt@kernel.org Cc: devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, dave.stevenson@raspberrypi.com, maxime@cerno.tech References: <20211124150757.17929-1-noralf@tronnes.org> <20211124150757.17929-4-noralf@tronnes.org> <1a094ddf-2190-3586-16b9-8c610e406bc2@lechnology.com> From: =?UTF-8?Q?Noralf_Tr=c3=b8nnes?= In-Reply-To: <1a094ddf-2190-3586-16b9-8c610e406bc2@lechnology.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Den 06.12.2021 16.19, skrev David Lechner: > On 11/24/21 9:07 AM, Noralf Trønnes wrote: >> The datasheet lists the minimum Serial clock cycle (Write) as 66ns >> which is > > Is this supposed to say "maximum" rather than "minimum"? > Minimum cycle time == maximum frequency. Noralf. >> 15MHz. Mostly it can do much better than that and is in fact often run at >> 32MHz. With a clever driver that runs configuration commands at a low >> speed >> and only the pixel data at the maximum speed the configuration can't be >> messed up by transfer errors and the speed is only limited by the >> amount of >> pixel glitches that one is able to tolerate. >> >> Signed-off-by: Noralf Trønnes >> --- > Acked-by: David Lechner