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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 0F4D6C433E0 for ; Sat, 8 Aug 2020 23:40:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D847620656 for ; Sat, 8 Aug 2020 23:40:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596930033; bh=IfDtPWHDu6w1xaYNiEa8Sqca5Op8tyggw6IiHrLJwWM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=lKUFlK/Qb9BetlLquW+9ZTDxJarfqLdhIDOTXFV03N/txlo22+U+8UzojXPbFBSDY Xsxc0m1DcNiimdGNv9gl89Z4qH3BG2EGjOwajobI1l3p8HdLiOlIa4CdymGPcBFMbJ 5+zSK7IQAjeb73lblk036soS8Ir3pJSAWSVX8Qew= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728847AbgHHXkc (ORCPT ); Sat, 8 Aug 2020 19:40:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:55796 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728470AbgHHXkX (ORCPT ); Sat, 8 Aug 2020 19:40:23 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BC25D20855; Sat, 8 Aug 2020 23:40:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596930022; bh=IfDtPWHDu6w1xaYNiEa8Sqca5Op8tyggw6IiHrLJwWM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tGiQ+Y7j5cwtcsD5j0v+PQTvnF/xy/FjyIPTJzqh5stlvyquKKTLSHzX6SosASxdu F5w1trTWocnEPw1E+9XTLs2nvmSKUo0G59vPCZRJC4X+2JG1ExbThxsjT1AZmzI/VD Wo9tsMm/jd/bHMqiKllN7umu9mhqPXG0Mn+ApXqk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alim Akhtar , Krzysztof Kozlowski , Sasha Levin , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 07/14] arm64: dts: exynos: Fix silent hang after boot on Espresso Date: Sat, 8 Aug 2020 19:40:06 -0400 Message-Id: <20200808234013.3619541-7-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200808234013.3619541-1-sashal@kernel.org> References: <20200808234013.3619541-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 { -- 2.25.1