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=-4.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=no 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 EB9DCCA9EA0 for ; Mon, 28 Oct 2019 09:45:53 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B4C14208C0 for ; Mon, 28 Oct 2019 09:45:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="niXTSCf9"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="DTkHA3nn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B4C14208C0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:To:Subject:From: References:In-Reply-To:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=xWWEfqL6UqmIcjvnmf936AQnR/LwPetg08G31m6u7us=; b=niXTSCf9Dtv5QD Kyig/Ij9pR6NVfbeYqyECEu+WoxHXDY6gxSNte2QgYwg4YiWBGIQWYtc2vb7+157vzf05NyREtLHw /rOKsc5C4QO4IA59BwC68Iw8na+IbWSNhPERTB6Gz9GOyfA8U79FWFqI+mChJu1kGb2HXjeAWPgg7 a2uvvm+Jpzuk3dya8uXa6VkTLtnAYH1HI+PkXC1HHRbwj/iOxdrQdGOdzLMU9N7vUNych0elVqyDD OEwoZC5734KAWgHTEjmPHktDoc/HBeNPRBYJ9fBWvmSBOEvM8Mgp3/bS9L9esjCcvL7X1MAYy1PKF UIjT30vdn9pGmKYWOUeg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iP1az-0000uD-AV; Mon, 28 Oct 2019 09:45:53 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iP1aw-0000te-0Z for linux-arm-kernel@lists.infradead.org; Mon, 28 Oct 2019 09:45:51 +0000 Received: from kernel.org (unknown [104.132.0.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4920E208C0; Mon, 28 Oct 2019 09:45:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572255949; bh=NpA9WFAdCxizCJxZSvAxIdo/i5JN5nJYOoDLmsKAt/I=; h=In-Reply-To:References:Cc:From:Subject:To:Date:From; b=DTkHA3nnwVaScqXjtw8VkSDfOUDg9xr+lg/z6q4znfjZND4muFY2zzmZ96N83EeeJ XiH1eVY/3HLy0okTR/I1fcJKgbFJPsAX13l4O/S00GfCf2BY1BqJ2G3tAo6iHD0azG nuhItMbAsrSz4rk88+dvjYNBJN2EJ1xLQWJy9r6A= MIME-Version: 1.0 In-Reply-To: References: From: Stephen Boyd Subject: Re: [PATCH] clk: imx8m: Use SYS_PLL1_800M as intermediate parent of CLK_ARM To: Leonard Crestez , Shawn Guo User-Agent: alot/0.8.1 Date: Mon, 28 Oct 2019 02:45:48 -0700 Message-Id: <20191028094549.4920E208C0@mail.kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191028_024550_080667_966AD1CA X-CRM114-Status: UNSURE ( 9.02 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dong Aisheng , Jacky Bai , Anson Huang , Michael Turquette , linux-imx@nxp.com, kernel@pengutronix.de, Fabio Estevam , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Abel Vesa Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Quoting Leonard Crestez (2019-10-22 12:21:28) > During cpu frequency switching the main "CLK_ARM" is reparented to an > intermediate "step" clock. On imx8mm and imx8mn the 24M oscillator is > used for this purpose but it is extremely slow, increasing wakeup > latencies to the point that i2c transactions can timeout and system > becomes unresponsive. > > Fix by switching the "step" clk to SYS_PLL1_800M, matching the behavior > of imx8m cpufreq drivers in imx vendor tree. > > This bug was not immediately apparent because upstream arm64 defconfig > uses the "performance" governor by default so no cpufreq transitions > happen. > > Fixes: ba5625c3e272 ("clk: imx: Add clock driver support for imx8mm") > Fixes: 96d6392b54db ("clk: imx: Add support for i.MX8MN clock driver") > > Cc: stable@vger.kernel.org > Signed-off-by: Leonard Crestez > --- Applied to clk-fixes _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel