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=-13.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 57112C2D0A8 for ; Tue, 29 Sep 2020 01:30:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1361B208FE for ; Tue, 29 Sep 2020 01:30:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601343030; bh=lX9O4hxvxd90v1IeDiyJoQVpOMMiA7ft8aBH2MqUH60=; h=From:To:Cc:Subject:Date:List-ID:From; b=AsNWc9n909R1AIxiVrzrKVTDiDPsDVllKlKDf/cVGv5WD4Q5UpK4Fhhv2VYyb8Z5r igGCQm3N8u+XzqBMTFo9c/bz4Z9TJn35U+gvquxJAzrvbjWnI9t8CEGHzaM4D6xznx n52rvJA9L4DDeKm4nngGryTDVRXXf0EUwQXtWRXI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727177AbgI2Ba3 (ORCPT ); Mon, 28 Sep 2020 21:30:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:39272 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726379AbgI2Ba3 (ORCPT ); Mon, 28 Sep 2020 21:30:29 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6280A2083B; Tue, 29 Sep 2020 01:30:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601343029; bh=lX9O4hxvxd90v1IeDiyJoQVpOMMiA7ft8aBH2MqUH60=; h=From:To:Cc:Subject:Date:From; b=a7sj9sdi5WSXc7BXNnKs3zrdZZWUN7ZDB7O+wsrc6ij6zA7NbLruJ49HlyWGMTaV2 tIk/sNCid6tedj0tnl8CXlu0ouPBzEEBQjZmF/FxiMtqmnJuNLZtBJIFtlEj5rn5yI dNMSgPz+Wa32hjzL7vGVh0ZUDidga5lJghHhhMFo= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Guo Ren , Xu Kai , Daniel Lezcano , Thomas Gleixner , Sasha Levin , linux-csky@vger.kernel.org Subject: [PATCH AUTOSEL 5.8 01/29] clocksource/drivers/timer-gx6605s: Fixup counter reload Date: Mon, 28 Sep 2020 21:29:58 -0400 Message-Id: <20200929013027.2406344-1-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-csky@vger.kernel.org From: Guo Ren [ Upstream commit bc6717d55d07110d8f3c6d31ec2af50c11b07091 ] When the timer counts to the upper limit, an overflow interrupt is generated, and the count is reset with the value in the TIME_INI register. But the software expects to start counting from 0 when the count overflows, so it forces TIME_INI to 0 to solve the potential interrupt storm problem. Signed-off-by: Guo Ren Tested-by: Xu Kai Cc: Daniel Lezcano Cc: Thomas Gleixner Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/1597735877-71115-1-git-send-email-guoren@kernel.org Signed-off-by: Sasha Levin --- drivers/clocksource/timer-gx6605s.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clocksource/timer-gx6605s.c b/drivers/clocksource/timer-gx6605s.c index 80d0939d040b5..8d386adbe8009 100644 --- a/drivers/clocksource/timer-gx6605s.c +++ b/drivers/clocksource/timer-gx6605s.c @@ -28,6 +28,7 @@ static irqreturn_t gx6605s_timer_interrupt(int irq, void *dev) void __iomem *base = timer_of_base(to_timer_of(ce)); writel_relaxed(GX6605S_STATUS_CLR, base + TIMER_STATUS); + writel_relaxed(0, base + TIMER_INI); ce->event_handler(ce); -- 2.25.1