From patchwork Thu Apr 16 13:22:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 227944 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 C8F66C3815B for ; Thu, 16 Apr 2020 13:27:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9F4BE21D94 for ; Thu, 16 Apr 2020 13:27:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587043636; bh=VjOqGkCEHfNRK8F13RVyzKzLhBVoJarF1/KtDo/igqc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kcxM0XcWfX4vMt6tk/Io3asg2snhz5lkBZUwoQlv4MMAXoXjMVN3S5VRjvzPlvltV c+nW01fOMvht79pkkQg/aYxaVVN35rp2X5LF/Ene+9MNgw4zBTjkixNXkMcJ7ooWu5 h069iC5GK5cGC62W59oiwPngSU9SST4UyjvgYbeM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2895429AbgDPN1O (ORCPT ); Thu, 16 Apr 2020 09:27:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:35518 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2895423AbgDPN1N (ORCPT ); Thu, 16 Apr 2020 09:27:13 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 0466B217D8; Thu, 16 Apr 2020 13:27:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587043632; bh=VjOqGkCEHfNRK8F13RVyzKzLhBVoJarF1/KtDo/igqc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NlZOq8Q5ZvoUNeOkAOfNQp/YLyj0MQn59eqcqmBMwbyGmdjiM+4Jd1QukeFlrMmte z62PeInMi1yAwUTTkGEfPfX0HyAvCr2Anx78Br7YKTz4Po/fdkihjfl+Nu41YaH2wH c0mfYRd5OI2iyJJ6qxNXRaUHcbUH3v4kzVGYupXk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Niedermaier , Viresh Kumar , Sasha Levin Subject: [PATCH 4.19 010/146] cpufreq: imx6q: Fixes unwanted cpu overclocking on i.MX6ULL Date: Thu, 16 Apr 2020 15:22:31 +0200 Message-Id: <20200416131243.952408577@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131242.353444678@linuxfoundation.org> References: <20200416131242.353444678@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christoph Niedermaier [ Upstream commit 36eb7dc1bd42fe5f850329c893768ff89b696fba ] imx6ul_opp_check_speed_grading is called for both i.MX6UL and i.MX6ULL. Since the i.MX6ULL was introduced to a separate ocotp compatible node later, it is possible that the i.MX6ULL has also dtbs with "fsl,imx6ull-ocotp". On a system without nvmem-cell speed grade a missing check on this node causes a driver fail without considering the cpu speed grade. This patch prevents unwanted cpu overclocking on i.MX6ULL with compatible node "fsl,imx6ull-ocotp" in old dtbs without nvmem-cell speed grade. Fixes: 2733fb0d0699 ("cpufreq: imx6q: read OCOTP through nvmem for imx6ul/imx6ull") Signed-off-by: Christoph Niedermaier Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin --- drivers/cpufreq/imx6q-cpufreq.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index d8c3595e90236..a0cbbdfc77359 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -310,6 +310,9 @@ static int imx6ul_opp_check_speed_grading(struct device *dev) void __iomem *base; np = of_find_compatible_node(NULL, NULL, "fsl,imx6ul-ocotp"); + if (!np) + np = of_find_compatible_node(NULL, NULL, + "fsl,imx6ull-ocotp"); if (!np) return -ENOENT;