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=-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=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 72347C433DF for ; Mon, 17 Aug 2020 18:34:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F84D2053B for ; Mon, 17 Aug 2020 18:34:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597689266; bh=lWgkR05ZLdyajB7h9qa3gzGicGf+5etfvA1S5tRgY10=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=hDeefOeO1GvWZIW9mVmzfSdeCGCKZsJX0ZbmqQZYaJqEhpE3pp7J7lb8IsdNQlRyQ /YUzijLOs6u8jJ2YMQX6s8QstPHDsPpw/TY6EN0Ehvpq0G4nQCkdZnTPRAiW7q4dzk tvhlAhD5wOuLYnHAn0XOix1abE0aclfVCwh9kQ+4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391248AbgHQSeY (ORCPT ); Mon, 17 Aug 2020 14:34:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:47548 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731005AbgHQQAL (ORCPT ); Mon, 17 Aug 2020 12:00:11 -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 D31AF20885; Mon, 17 Aug 2020 16:00:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597680011; bh=lWgkR05ZLdyajB7h9qa3gzGicGf+5etfvA1S5tRgY10=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yrk9iv/U4Mt1OmlX+f3zWIuKcuKi6SUjVbcFPEQG9b2vLMJ2XN/ws6oCbPrvxwOmV tV+3MiNIm6Twa6fMACLZN3ardwPJhA9ZDeRfg2ylVais2+5PoLfV2Wo8BjRiak2RXT +K/HOCoWGumOrW8J0k7fUzA8GTdUQpbQt5nmcT4I= 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 5.4 019/270] arm64: dts: exynos: Fix silent hang after boot on Espresso Date: Mon, 17 Aug 2020 17:13:40 +0200 Message-Id: <20200817143756.745688466@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143755.807583758@linuxfoundation.org> References: <20200817143755.807583758@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 080e0f56e108f..61ee7b6a31594 100644 --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts @@ -157,6 +157,7 @@ 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