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=-9.8 required=3.0 tests=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 38658C32792 for ; Thu, 3 Oct 2019 16:33:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 100B72086A for ; Thu, 3 Oct 2019 16:33:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570120400; bh=3iuTUPH38z8GhXhGf0ZoFLJizgr0/Dx+jX0EiSbp/nM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FX/Kk4E93P7pQdq11hbUk6M8uwH2Jy9lIGW2dx3DrnQdp8zxBInQ54K4i5RfcBHx8 KmH9X+5d/ezE/o+yVPnyWzPDuaMM9SFrh4YYIZYFq4odZLGvtxhS9TF7AqrTFFuGPr hfHx01w9X+PJjV/jzTcnPfmWiM04/BNpX16Nj7DQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404029AbfJCQdS (ORCPT ); Thu, 3 Oct 2019 12:33:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:41178 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391274AbfJCQdP (ORCPT ); Thu, 3 Oct 2019 12:33:15 -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 68A2A2086A; Thu, 3 Oct 2019 16:33:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570120394; bh=3iuTUPH38z8GhXhGf0ZoFLJizgr0/Dx+jX0EiSbp/nM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xj2RCNOx8xUR0JmPnUsIem2LeZ39ftM+2PufEbBvSa2+NepWEWp5no33EPaGdbjSq kZmW0vrRlV/bKSXv3uJMJx+2MixOVm1TUtGI9hznE7a1gSkctQfwcxR51gnVhQSTq+ 8ijgMJSuN0ytrNbxhUeQaeu7dq6ey1lbmWbcthds= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marek Szyprowski , Krzysztof Kozlowski , Sasha Levin Subject: [PATCH 5.2 168/313] ARM: dts: exynos: Mark LDO10 as always-on on Peach Pit/Pi Chromebooks Date: Thu, 3 Oct 2019 17:52:26 +0200 Message-Id: <20191003154549.512120380@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191003154533.590915454@linuxfoundation.org> References: <20191003154533.590915454@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: Marek Szyprowski [ Upstream commit 5b0eeeaa37615df37a9a30929b73e9defe61ca84 ] Commit aff138bf8e37 ("ARM: dts: exynos: Add TMU nodes regulator supply for Peach boards") assigned LDO10 to Exynos Thermal Measurement Unit, but it turned out that it supplies also some other critical parts and board freezes/crashes when it is turned off. The mentioned commit made Exynos TMU a consumer of that regulator and in typical case Exynos TMU driver keeps it enabled from early boot. However there are such configurations (example is multi_v7_defconfig), in which some of the regulators are compiled as modules and are not available from early boot. In such case it may happen that LDO10 is turned off by regulator core, because it has no consumers yet (in this case consumer drivers cannot get it, because the supply regulators for it are not yet available). This in turn causes the board to crash. This patch restores 'always-on' property for the LDO10 regulator. Fixes: aff138bf8e37 ("ARM: dts: exynos: Add TMU nodes regulator supply for Peach boards") Signed-off-by: Marek Szyprowski Signed-off-by: Krzysztof Kozlowski Signed-off-by: Sasha Levin --- arch/arm/boot/dts/exynos5420-peach-pit.dts | 1 + arch/arm/boot/dts/exynos5800-peach-pi.dts | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts index f78db6809cca4..9eb48cabcca45 100644 --- a/arch/arm/boot/dts/exynos5420-peach-pit.dts +++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts @@ -440,6 +440,7 @@ regulator-name = "vdd_ldo10"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; regulator-state-mem { regulator-off-in-suspend; }; diff --git a/arch/arm/boot/dts/exynos5800-peach-pi.dts b/arch/arm/boot/dts/exynos5800-peach-pi.dts index e0f470fe54c81..4398f2d1fe881 100644 --- a/arch/arm/boot/dts/exynos5800-peach-pi.dts +++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts @@ -440,6 +440,7 @@ regulator-name = "vdd_ldo10"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; regulator-state-mem { regulator-off-in-suspend; }; -- 2.20.1