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,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 CAFA0C433DF for ; Thu, 20 Aug 2020 10:00:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9540B21775 for ; Thu, 20 Aug 2020 10:00:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597917604; bh=y9ShighU1IxoGurbS7G9NRZYkUnFsrUe92tmo3VmKjc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=m/fH6gqR19UOOpV/jpB9oQiinYK47jcwPo3yKaw/gYNG7IybWL/UOC1t7JNqby38M +yOxN+V2QSuqinYE17/dv+kQhozJamty2zUEnO0VQwJxwSDGYbPXc9bbRUEyKNafHw UZrnFs64wbab3c+YO9Ng3Y/u0zqq4UIjq3tEJqCs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730456AbgHTJ77 (ORCPT ); Thu, 20 Aug 2020 05:59:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:46160 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727794AbgHTJ7t (ORCPT ); Thu, 20 Aug 2020 05:59:49 -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 539372067C; Thu, 20 Aug 2020 09:59:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597917588; bh=y9ShighU1IxoGurbS7G9NRZYkUnFsrUe92tmo3VmKjc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KN1JNKYgYezvCCwNvElB8Ae8YVOix5srGiJgI7sTRD9x1faY8Yg65bilZ+6KNQjza 60aQrwt2CwtUr5dxI+CjVny128+Gweb3KAaHIatGdwJIyAN4L+9zLE2xYH5sMLZ8EX PTZR2QTuBWdo+FuYbJQgXxolxh/BECcjA/FUll88= 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 4.9 084/212] arm64: dts: exynos: Fix silent hang after boot on Espresso Date: Thu, 20 Aug 2020 11:20:57 +0200 Message-Id: <20200820091606.601139326@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091602.251285210@linuxfoundation.org> References: <20200820091602.251285210@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 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