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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 414ABC83F1A for ; Fri, 11 Jul 2025 08:55:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=GkZoduVqumtiEfQnQGzIJk1vG8qGeS4iGJFAehTc+vM=; b=sVjJFZ3Cp/UUAg+GcMsZjsdcWB cfAcdgY/L0ScqAzos3Q3i2MuGF541wTt+k9RLuRBBl/Vg7x6TXD0xLfmJ/bdn3ZZ6panQD4JlOjJU gPPTtVab0/KlSN0XrZysSRlw6KTvkF4IU51bP2wqXm8WBv90k0yUUExQMEHAPDgu3y6yH48l/L+7K hCuZAJcaLVFLhZuRVv1/xVVmQmyTUr9XT+KsEpHhKIRM5W80wYpfHFwatT8/QTYMqHsG/l3Daxm0/ W2mTFRKm3qGqoAvkTYmS0KUtRAtf68AN/4GZt5veEiow+sz37CxdwsJ5LESmsTqKLC9sRUEo3wh/g WUgC2VJw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ua9XQ-0000000EDyt-2W9z; Fri, 11 Jul 2025 08:55:24 +0000 Received: from mail-m16.yeah.net ([1.95.21.15]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1ua8kU-0000000E4X8-2mSs for linux-arm-kernel@lists.infradead.org; Fri, 11 Jul 2025 08:04:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yeah.net; s=s110527; h=Date:From:To:Subject:Message-ID:MIME-Version: Content-Type; bh=GkZoduVqumtiEfQnQGzIJk1vG8qGeS4iGJFAehTc+vM=; b=bxxLkygmhvHTXs+MXsZXUX1n4jDPnz24VHGmwURFEn7WNma7xzcYqGLCvFzH1i K5Ci5gqr5HLCWaoAb20LyNlqAo9x/6r+JhZc9zYRyisvYYhLMfbUqLZsHfNZTXdx hnNIBZ58CxDEdmDEiyQfnmhcK418bsc3xYLVXA9PeYApU= Received: from dragon (unknown []) by gzsmtp2 (Coremail) with SMTP id Ms8vCgD3_ySIxXBoVFpTAA--.58278S3; Fri, 11 Jul 2025 16:04:26 +0800 (CST) Date: Fri, 11 Jul 2025 16:04:24 +0800 From: Shawn Guo To: Tim Harvey Cc: linux-arm-kernel@lists.infradead.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH 1/7] arm64: dts: imx8mm-venice-gw700x: Increase HS400 USDHC clock speed Message-ID: References: <20250707201702.2930066-1-tharvey@gateworks.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250707201702.2930066-1-tharvey@gateworks.com> X-CM-TRANSID: Ms8vCgD3_ySIxXBoVFpTAA--.58278S3 X-Coremail-Antispam: 1Uf129KBjDUn29KB7ZKAUJUUUU8529EdanIXcx71UUUUU7v73 VFW2AGmfu7bjvjm3AaLaJ3UbIYCTnIWIevJa73UjIFyTuYvjxU5g4SUUUUU X-Originating-IP: [114.216.146.217] X-CM-SenderInfo: pvkd40hjxrjqh1hdxhhqhw/1tbiCRGHZWhwiwXKEAAAs2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250711_010451_052835_975D652D X-CRM114-Status: UNSURE ( 8.65 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jul 07, 2025 at 01:16:56PM -0700, Tim Harvey wrote: > The IMX8M reference manuals indicate in the USDHC Clock generator section > that the clock rate for DDR is 1/2 the input clock therefore HS400 rates > clocked at 200Mhz require a 400Mhz SDHC clock. > > This showed about a 1.5x improvement in read performance for the eMMC's > used on the various imx8m{m,n,p}-venice boards. > > Fixes: 6f30b27c5ef5 ("arm64: dts: imx8mm: Add Gateworks i.MX 8M Mini Development Kits") > Signed-off-by: Tim Harvey Applied all, thanks!