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=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 83B42C433E0 for ; Sat, 8 Aug 2020 23:40:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5137B2053B for ; Sat, 8 Aug 2020 23:40:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596930046; bh=y9ShighU1IxoGurbS7G9NRZYkUnFsrUe92tmo3VmKjc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CoxOgDsN/chXDgKzDOdVGKqunpKzK3zeBYOLt+JoiEPBBF8ocX+sawlKXx77Vl15s j+m8Ifh09ZCgnhlNIYATL+iKdIwAfYyqUiQdzlJSPqD6CHqF19FvLY3qKdF7cdoJ5I 82NaY6iHO24C0DiEhXTjF9/hCiipvKd/Od9/iQho= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728897AbgHHXkp (ORCPT ); Sat, 8 Aug 2020 19:40:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:56324 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728100AbgHHXkm (ORCPT ); Sat, 8 Aug 2020 19:40:42 -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 96DC72053B; Sat, 8 Aug 2020 23:40:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596930041; bh=y9ShighU1IxoGurbS7G9NRZYkUnFsrUe92tmo3VmKjc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GwE93T0oCYDfK3B0jCBFLfEWLZj0/Wuj0qKD1OMqpGgxPWLSdBHv9syKuunf2YI7g Vdv+qDe3UAw0A1zR22DvS1FzBvGVErO8JWmygIJI85nypXBWvBvGl6xmc67Mdmy+4q IMVTFmxJxOkyg+5qME2v30LeSrk/8ShMokKfN0GI= 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 4.9 3/9] arm64: dts: exynos: Fix silent hang after boot on Espresso Date: Sat, 8 Aug 2020 19:40:30 -0400 Message-Id: <20200808234037.3619732-3-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200808234037.3619732-1-sashal@kernel.org> References: <20200808234037.3619732-1-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 c528dd52ba2d3..2f7d144d556da 100644 --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts @@ -131,6 +131,7 @@ 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