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=-13.1 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=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 49FEBC433E1 for ; Tue, 18 Aug 2020 07:32:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 185652075E for ; Tue, 18 Aug 2020 07:32:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597735933; bh=2CdVodKumI00uNZaCEshR5tnnKeAEtLl1Aw0pwokYGU=; h=From:To:Cc:Subject:Date:List-ID:From; b=1+vIw6iUBapcS5qjnsUiCfdAl8P2Hlc+2gbTjRcBsS/d0mzL+uaz5Bc31fAtDMkjm CQMk3R0/rdKQaYKmMGCV/wF0NI+BPSrUYcepUnl6kRCogvocrEle/UmYUSYN8+l42a Jfee50iFaij40nz7PHIhy7N6s2Z3+I7phvP0wYEE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726568AbgHRHcL (ORCPT ); Tue, 18 Aug 2020 03:32:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:58378 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726043AbgHRHcK (ORCPT ); Tue, 18 Aug 2020 03:32:10 -0400 Received: from localhost.localdomain (unknown [42.120.72.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 56E6B206B5; Tue, 18 Aug 2020 07:32:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597735930; bh=2CdVodKumI00uNZaCEshR5tnnKeAEtLl1Aw0pwokYGU=; h=From:To:Cc:Subject:Date:From; b=jCpu7cW16x/OotQzMdmTcZA2KCpx23fWGLuaNHc9tUS3SgulxjvcEVYVaaKVVWpl/ H1yrrgLnMjWFB90s+WofI1qGlMNG0Z+kJX8T+btw4oAtjxBlTPqL/cGInhFqxvmiy3 oPylsV8dQPtIpyPHdOL/XV1JBixhch+cysvATqxk= From: guoren@kernel.org To: guoren@kernel.org Cc: linux-csky@vger.kernel.org, linux-kernel@vger.kernel.org, Guo Ren , Daniel Lezcano , Thomas Gleixner Subject: [PATCH] clocksource/drivers/timer-gx6605s: Fixup counter reload Date: Tue, 18 Aug 2020 07:31:17 +0000 Message-Id: <1597735877-71115-1-git-send-email-guoren@kernel.org> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guo Ren 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 --- 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 80d0939..8d386ad 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); -- 2.7.4