From patchwork Thu Aug 20 09:20:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 265736 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 052E2C433E1 for ; Thu, 20 Aug 2020 10:10:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDE9B20738 for ; Thu, 20 Aug 2020 10:10:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597918217; bh=IfDtPWHDu6w1xaYNiEa8Sqca5Op8tyggw6IiHrLJwWM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WIOgP9wYm11giNaMgNppwJ0f/dlyn9gxh8TnGwi8XujInGpn//hFaYlqWMY5p6DXL /hXJ5cBOZkumCPJuufGaYEivHpWqHUuFMbf0MK7aPJIXZMMDsNqV2dScdVNZAjmljL lFHqCW5EPhSXkHayaPYo7Mn/U2KkHesbZpF3UpNQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730878AbgHTKKR (ORCPT ); Thu, 20 Aug 2020 06:10:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:46370 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730874AbgHTKKP (ORCPT ); Thu, 20 Aug 2020 06:10:15 -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 E1FF520724; Thu, 20 Aug 2020 10:10:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597918215; bh=IfDtPWHDu6w1xaYNiEa8Sqca5Op8tyggw6IiHrLJwWM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NoMYNYexZAkRs+Ag6AVAJMZsf+UGZ7PU7tLHRYhwyM7DXYReRP+ZNE030FKQ5vXOf cXDoJgxfn52XQA4A37B8QW4O2bXknXOS120xuNS/1feJcKx8aoKprDQKJ1/63E3UFx L7P0juWgi4MijMBPnIPO+4fQzIGORyeodqfT/YWw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alim Akhtar , Krzysztof Kozlowski , Sasha Levin Subject: [PATCH 4.14 052/228] arm64: dts: exynos: Fix silent hang after boot on Espresso Date: Thu, 20 Aug 2020 11:20:27 +0200 Message-Id: <20200820091610.215335414@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091607.532711107@linuxfoundation.org> References: <20200820091607.532711107@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: Alim Akhtar [ Upstream commit b072714bfc0e42c984b8fd6e069f3ca17de8137a ] Once regulators are disabled after kernel boot, on Espresso board silent hang observed because of LDO7 being disabled. LDO7 actually provide power to CPU cores and non-cpu blocks circuitries. Keep this regulator always-on to fix this hang. Fixes: 9589f7721e16 ("arm64: dts: Add S2MPS15 PMIC node on exynos7-espresso") Signed-off-by: Alim Akhtar Signed-off-by: Krzysztof Kozlowski Signed-off-by: Sasha Levin --- arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts index 4a8b1fb51243c..c8824b918693d 100644 --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts @@ -155,6 +155,7 @@ ldo7_reg: LDO7 { regulator-min-microvolt = <700000>; regulator-max-microvolt = <1150000>; regulator-enable-ramp-delay = <125>; + regulator-always-on; }; ldo8_reg: LDO8 {