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 33C92C4345F for ; Sat, 4 May 2024 12:01:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jojMPrSjBgqEF5z38c7jrKKpVZlt7Y13b7G+STvh/5E=; b=mf8RmzIULWfH4I uAIgnKvC2eHpF3ZGxJajmgI7DAvdPy/wzruNi/tEkLrJijWu5HmYufwDbDHpInV+w6XkQ1yYzZnfG n1hv11cFdcNLHLbjiknG8xExO2NSbF/mHjjG9Zkfds6FnfithDLKOUldmXC6tpe+/MFpHUTpuFzUZ AM6fvIU5eRFQKbJUxbNLmU6kdAzxicsHQi0P0iu3ZamWN9mMdOrmxmF6ksdzgyA/yQLAGSQg/DsX6 0AN98vAqZpZLboG2o1iyWwPYzYlJdBmYArn9X3k2iaZ+tImvNTiR+zD+EIsAylp4gsCgbKsdm977K HmWTM1e43srMEySBMu8w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s3E56-00000001wW1-35Is; Sat, 04 May 2024 12:01:32 +0000 Received: from mail11.truemail.it ([2001:4b7e:0:8::81]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s3E53-00000001wVG-0yAp for linux-arm-kernel@lists.infradead.org; Sat, 04 May 2024 12:01:30 +0000 Received: from francesco-nb (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id 4F8AC1FC17; Sat, 4 May 2024 14:01:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1714824086; bh=RDCWpEhUSa7ErprbfVlOsGqwAI0proMiKIt11OMQwEc=; h=From:To:Subject; b=CCf9uezyQ3qNbeZ0A/pisU3qvhU6jq/0+m6iJeCPE3h03mjnnV2wopc8fcyFonEmM m8LkRVk4pIAHtHLiNyZq4g4NoPx9TrNADd1aPKXJBauAulud5wDOhyRWtbC4Ztc2Og Is2yC6+M5BDYPBXK4ADBcIJ0OcSTOk5oT82BnsnG1cYt/zXfF+sztLulafjY4Xx9+U hrXKFz4mWyRM7enFzPv3gaBKI+MvQWJf//nDX70sizGKFyHYyd9uQZ7zCtLMe+QGss gXDgZsV1tqErvOApABsA5eU6cYa2G9UGtJYnS/RoZQj8w/uV4mgGYPCN4+QUzeANJ1 gvz0sS62LiaiQ== Date: Sat, 4 May 2024 14:01:24 +0200 From: Francesco Dolcini To: "Peng Fan (OSS)" Cc: Abel Vesa , Michael Turquette , Stephen Boyd , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Jacky Bai , Ye Li , Dong Aisheng , linux-clk@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Abel Vesa , Peng Fan Subject: Re: [PATCH 10/18] clk: imx: Remove CLK_SET_PARENT_GATE for DRAM mux for i.MX7D Message-ID: <20240504120124.GC3666@francesco-nb> References: <20240504-imx-clk-v1-0-f7915489d58d@nxp.com> <20240504-imx-clk-v1-10-f7915489d58d@nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240504-imx-clk-v1-10-f7915489d58d@nxp.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240504_050129_767080_2B75F0E6 X-CRM114-Status: UNSURE ( 8.39 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello Peng, On Sat, May 04, 2024 at 08:49:03AM +0800, Peng Fan (OSS) wrote: > From: Peng Fan > > For i.MX7D DRAM related mux clock, the clock source change should ONLY > be done done in low level asm code without accessing DRAM, and then > calling clk API to sync the HW clock status with clk tree, it should never > touch real clock source switch via clk API, so CLK_SET_PARENT_GATE flag > should NOT be added, otherwise, DRAM's clock parent will be disabled when > DRAM is active, and system will hang. >From the description this is solving a system hang, but no fixes tag nor cc stable. Francesco _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel