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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 9754BC2D0C0 for ; Mon, 9 Dec 2019 01:16:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 64280206E0 for ; Mon, 9 Dec 2019 01:16:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575854168; bh=JvEqpVrun2YFKcAtg6Xj2oyqoVae03jHhJjp7UzZIxc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=IrUEzXlmSaiwyxvR4y7BYk/xYqWYJQULIYWSiC3xIO0Yyj+Td+nby8IoowJwKVHi4 f54Sw1P0rYq/CNQEebnUVk875CPCZXpwzIRwhZrtHQli+VjaTxq/joT9A8SEJDrtcQ Et4zrilzo8bJcyNSTDkMiuvmqHBCA3u29gYZ+5mQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726706AbfLIBQH (ORCPT ); Sun, 8 Dec 2019 20:16:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:50696 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726596AbfLIBQH (ORCPT ); Sun, 8 Dec 2019 20:16:07 -0500 Received: from dragon (98.142.130.235.16clouds.com [98.142.130.235]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0A24E20637; Mon, 9 Dec 2019 01:15:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575854167; bh=JvEqpVrun2YFKcAtg6Xj2oyqoVae03jHhJjp7UzZIxc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=bCetXA8zlxofpxOJnSTSxk8/VGNyVXYVLdCm5bWaSb/bct+q6Vau0FihIpkRVeL+5 fKtcJgh5nGuqGBfapZhzrdf+kC00lApH3Nmgg6sfHsYvn+vB9z3US/GKRsW5OR5glt PVPwBGO5KEcr7oCc8awsguy43GOBTcTzA+1L0kPI= Date: Mon, 9 Dec 2019 09:15:47 +0800 From: Shawn Guo To: Leonard Crestez Cc: Stephen Boyd , Chanwoo Choi , Rob Herring , MyungJoo Ham , Kyungmin Park , "Rafael J. Wysocki" , Mark Rutland , Michael Turquette , Artur =?utf-8?B?xZp3aWdvxYQ=?= , Saravana Kannan , Angus Ainslie , Martin Kepplinger , Matthias Kaehlcke , Krzysztof Kozlowski , Alexandre Bailon , Georgi Djakov , Dong Aisheng , Abel Vesa , Jacky Bai , Anson Huang , Fabio Estevam , Viresh Kumar , Silvano di Ninno , devicetree@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v7 1/5] clk: imx8m: Set CLK_GET_RATE_NOCACHE on dram clocks Message-ID: <20191209011546.GQ3365@dragon> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Fri, Nov 22, 2019 at 11:45:00PM +0200, Leonard Crestez wrote: > These clocks are only modified as part of DRAM frequency switches during > which DRAM itself is briefly inaccessible. The switch is performed with > a SMC call to by TF-A which runs from a SRAM area; upon returning to > linux several clocks bits are modified and we need to update them. > > For rate bits an easy solution is to just mark with > CLK_GET_RATE_NOCACHE so that new rates are always read back from > registers. > > Signed-off-by: Leonard Crestez > Reviewed-by: Abel Vesa Applied, thanks.