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,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 8EB4CC433FF for ; Mon, 5 Aug 2019 13:04:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 631A321882 for ; Mon, 5 Aug 2019 13:04:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565010261; bh=/cICx+80dZta7bh9CvT/1n+AsO2ktql8iA571OGiJ4c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=irppvdZdyfTA2USASaP2+hTOzj+DyEyi/n7OwjdtN2jpOXJDJzMVRD0FCNk3r/DdV AP/k7pog7ES0LsrakOnwRhqvlkzwsbp9E1K8l4MWwxywM8nwjTN7YSmT8zTp38U8BL V2NCXxuWzLmfAdGxWvy/MgbF0jnCIqjyEzHxJsTc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728987AbfHENEU (ORCPT ); Mon, 5 Aug 2019 09:04:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:39926 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728934AbfHENET (ORCPT ); Mon, 5 Aug 2019 09:04:19 -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 C4A552147A; Mon, 5 Aug 2019 13:04:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565010258; bh=/cICx+80dZta7bh9CvT/1n+AsO2ktql8iA571OGiJ4c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eyeEVnyiaMGd0LA8Vn6Sje2mDKEbXoPJEqUxLmnUaiQ0PnzO2wTfPFRuYUAVbCrx6 xzAKbOsx2OoPMLYHhBnu8X2DwcIrwhlFVy2hJtNeIcG6XRe9dnHSYQjjXGztCnLGuN uS3b6oz0CEjvMfBwq+bM2fp+J3HWX+2Bi4/i1MmQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Douglas Anderson , Heiko Stuebner , Sasha Levin Subject: [PATCH 4.4 02/22] ARM: dts: rockchip: Mark that the rk3288 timer might stop in suspend Date: Mon, 5 Aug 2019 15:02:39 +0200 Message-Id: <20190805124919.374971262@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190805124918.070468681@linuxfoundation.org> References: <20190805124918.070468681@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 [ Upstream commit 8ef1ba39a9fa53d2205e633bc9b21840a275908e ] This is similar to commit e6186820a745 ("arm64: dts: rockchip: Arch counter doesn't tick in system suspend"). Specifically on the rk3288 it can be seen that the timer stops ticking in suspend if we end up running through the "osc_disable" path in rk3288_slp_mode_set(). In that path the 24 MHz clock will turn off and the timer stops. To test this, I ran this on a Chrome OS filesystem: before=$(date); \ suspend_stress_test -c1 --suspend_min=30 --suspend_max=31; \ echo ${before}; date ...and I found that unless I plug in a device that requests USB wakeup to be active that the two calls to "date" would show that fewer than 30 seconds passed. NOTE: deep suspend (where the 24 MHz clock gets disabled) isn't supported yet on upstream Linux so this was tested on a downstream kernel. Signed-off-by: Douglas Anderson Signed-off-by: Heiko Stuebner Signed-off-by: Sasha Levin --- arch/arm/boot/dts/rk3288.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi index 04ea209f1737f..98abb053b7daf 100644 --- a/arch/arm/boot/dts/rk3288.dtsi +++ b/arch/arm/boot/dts/rk3288.dtsi @@ -205,6 +205,7 @@ , ; clock-frequency = <24000000>; + arm,no-tick-in-suspend; }; timer: timer@ff810000 { -- 2.20.1