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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 7B265C07E9B for ; Mon, 19 Jul 2021 16:37:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56C2B613D0 for ; Mon, 19 Jul 2021 16:37:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343856AbhGSPzW (ORCPT ); Mon, 19 Jul 2021 11:55:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:47894 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347961AbhGSPss (ORCPT ); Mon, 19 Jul 2021 11:48:48 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4F31E61582; Mon, 19 Jul 2021 16:28:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626712100; bh=NX+XniBkaOZOUpU6smko+YGbqSaqgsrVV5bBgbwVegQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HjDijLAnEwD26rhAxApZjD/Kj487bv8HqOCbXh5M283na2Tx+ge2UTqofOL/bN6uD 6hVW4sCFHmvNPLiVc8kAepGCpJPz48fD/AgG1/C6vkVMUoA7J9WDE+lYNoNue42mXo LDxWpOMso1Eom5tVyiOH8nFuB+phlAVamEVAnVBc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hsin-Yi Wang , "chun-jie.chen" , Enric Balletbo i Serra , Matthias Brugger , Sasha Levin Subject: [PATCH 5.12 250/292] soc: mtk-pm-domains: do not register smi node as syscon Date: Mon, 19 Jul 2021 16:55:12 +0200 Message-Id: <20210719144951.166395323@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144942.514164272@linuxfoundation.org> References: <20210719144942.514164272@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hsin-Yi Wang [ Upstream commit eed6ff1bb2da65067d928f4ab322c7d75f944fa4 ] Mediatek requires mmsys clocks to be unprepared during suspend, otherwise system has chances to hang. syscon_regmap_lookup_by_phandle_optional() will attach and prepare the first clock in smi node, leading to additional prepare to the clock which is not balanced with the prepare/unprepare pair in resume/suspend callbacks. If a power domain node requests an smi node and the smi node's first clock is an mmsys clock, it will results in an unstable suspend resume. Fixes: f414854c8843 ("soc: mediatek: pm-domains: Add SMI block as bus protection block") Signed-off-by: Hsin-Yi Wang Reviewed-by: chun-jie.chen Reviewed-by: Enric Balletbo i Serra Link: https://lore.kernel.org/r/20210601035905.2970384-2-hsinyi@chromium.org Signed-off-by: Matthias Brugger Signed-off-by: Sasha Levin --- drivers/soc/mediatek/mtk-pm-domains.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c index 0af00efa0ef8..22fa52f0e86e 100644 --- a/drivers/soc/mediatek/mtk-pm-domains.c +++ b/drivers/soc/mediatek/mtk-pm-domains.c @@ -297,6 +297,7 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no const struct scpsys_domain_data *domain_data; struct scpsys_domain *pd; struct device_node *root_node = scpsys->dev->of_node; + struct device_node *smi_node; struct property *prop; const char *clk_name; int i, ret, num_clks; @@ -352,9 +353,13 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no if (IS_ERR(pd->infracfg)) return ERR_CAST(pd->infracfg); - pd->smi = syscon_regmap_lookup_by_phandle_optional(node, "mediatek,smi"); - if (IS_ERR(pd->smi)) - return ERR_CAST(pd->smi); + smi_node = of_parse_phandle(node, "mediatek,smi", 0); + if (smi_node) { + pd->smi = device_node_to_regmap(smi_node); + of_node_put(smi_node); + if (IS_ERR(pd->smi)) + return ERR_CAST(pd->smi); + } num_clks = of_clk_get_parent_count(node); if (num_clks > 0) { -- 2.30.2