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 B6727C32792 for ; Thu, 3 Oct 2019 16:11:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8CBF8207FF for ; Thu, 3 Oct 2019 16:11:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570119086; bh=O45hS1XFtek78qi/yy2DUdGSAsD3n7PiKl6lfkTw7f8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DeghH4bC5WuBVEbVfSa3hSVmQOg49eLbanfC73MGDZd61T5HNznPzgrtHAFYodTsN TfoXxUiGJ3zEzYpJxCsId62HL5RbnIhwYa8/DT1YqgaJf7pVl5P6WaSR603etbyVsc 6TXcwWx1MYIZtfbJycre9E1mF9mvhYC+TAx3Xou0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387839AbfJCQL0 (ORCPT ); Thu, 3 Oct 2019 12:11:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:33100 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732680AbfJCQLX (ORCPT ); Thu, 3 Oct 2019 12:11:23 -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 2C03620865; Thu, 3 Oct 2019 16:11:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570119082; bh=O45hS1XFtek78qi/yy2DUdGSAsD3n7PiKl6lfkTw7f8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=urZ2X1xzq0suIy7+WiADftNJbpyqXBACpev52zTrUuq3j+Hh9mkftkqZTdQkFaSsF kShEegMqQG83mVWsv8iTiWjAOAc69KCtulSBGMpb7uGaY3Z7DoGMEOnJzwVBgV2+Pv quTWNZcr5PYAz9qKPgCL80gG30MV0g4VJk1lxnfQ= 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 4.14 118/185] ARM: dts: exynos: Mark LDO10 as always-on on Peach Pit/Pi Chromebooks Date: Thu, 3 Oct 2019 17:53:16 +0200 Message-Id: <20191003154504.880906309@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191003154437.541662648@linuxfoundation.org> References: <20191003154437.541662648@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 c91eff8475a87..7ccee2cfe4812 100644 --- a/arch/arm/boot/dts/exynos5420-peach-pit.dts +++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts @@ -426,6 +426,7 @@ 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 daad5d425cf5c..0900b38f60b4f 100644 --- a/arch/arm/boot/dts/exynos5800-peach-pi.dts +++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts @@ -426,6 +426,7 @@ 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