From patchwork Mon May 17 14:03:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 440592 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=-19.1 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, 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 6DFB8C43461 for ; Mon, 17 May 2021 15:42:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53FFD611BE for ; Mon, 17 May 2021 15:42:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241502AbhEQPoB (ORCPT ); Mon, 17 May 2021 11:44:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:52066 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243378AbhEQPmA (ORCPT ); Mon, 17 May 2021 11:42:00 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0775F6194D; Mon, 17 May 2021 14:42:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621262538; bh=P2EqQavx1rP6XcL6iz3KrATM+pJWU8gQ3J8eYh0pZXE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Efo+aqBC1ufCL7YI/xpb3May7BCx7i9bPeHVTM7kfhuPj00thGNcSIp/XzNBOrmSn wWytuyHWSu6jrPA+bLv15z5iZMGCHrm9gaoHO9mz1Gt7pXXpj4nAGFRBSAL9VZvuQ/ UI/637BbAuTcRdPz8Gg4CYSrI7oiLD+PaFyOBA8k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?utf-8?q?Pawe=C5=82_Chmiel?= , Krzysztof Kozlowski , Sylwester Nawrocki Subject: [PATCH 5.11 316/329] clk: exynos7: Mark aclk_fsys1_200 as critical Date: Mon, 17 May 2021 16:03:47 +0200 Message-Id: <20210517140312.783858826@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210517140302.043055203@linuxfoundation.org> References: <20210517140302.043055203@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Paweł Chmiel commit 34138a59b92c1a30649a18ec442d2e61f3bc34dd upstream. This clock must be always enabled to allow access to any registers in fsys1 CMU. Until proper solution based on runtime PM is applied (similar to what was done for Exynos5433), mark that clock as critical so it won't be disabled. It was observed on Samsung Galaxy S6 device (based on Exynos7420), where UFS module is probed before pmic used to power that device. In this case defer probe was happening and that clock was disabled by UFS driver, causing whole boot to hang on next CMU access. Fixes: 753195a749a6 ("clk: samsung: exynos7: Correct CMU_FSYS1 clocks names") Signed-off-by: Paweł Chmiel Acked-by: Krzysztof Kozlowski Link: https://lore.kernel.org/linux-clk/20201024154346.9589-1-pawel.mikolaj.chmiel@gmail.com [s.nawrocki: Added comment in the code] Signed-off-by: Sylwester Nawrocki Signed-off-by: Greg Kroah-Hartman --- drivers/clk/samsung/clk-exynos7.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/drivers/clk/samsung/clk-exynos7.c +++ b/drivers/clk/samsung/clk-exynos7.c @@ -537,8 +537,13 @@ static const struct samsung_gate_clock t GATE(CLK_ACLK_FSYS0_200, "aclk_fsys0_200", "dout_aclk_fsys0_200", ENABLE_ACLK_TOP13, 28, CLK_SET_RATE_PARENT | CLK_IS_CRITICAL, 0), + /* + * This clock is required for the CMU_FSYS1 registers access, keep it + * enabled permanently until proper runtime PM support is added. + */ GATE(CLK_ACLK_FSYS1_200, "aclk_fsys1_200", "dout_aclk_fsys1_200", - ENABLE_ACLK_TOP13, 24, CLK_SET_RATE_PARENT, 0), + ENABLE_ACLK_TOP13, 24, CLK_SET_RATE_PARENT | + CLK_IS_CRITICAL, 0), GATE(CLK_SCLK_PHY_FSYS1_26M, "sclk_phy_fsys1_26m", "dout_sclk_phy_fsys1_26m", ENABLE_SCLK_TOP1_FSYS11,