From patchwork Tue Mar 23 07:43:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 12157119 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,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 D3962C433C1 for ; Tue, 23 Mar 2021 07:44:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F426619B7 for ; Tue, 23 Mar 2021 07:44:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229692AbhCWHnh (ORCPT ); Tue, 23 Mar 2021 03:43:37 -0400 Received: from muru.com ([72.249.23.125]:45918 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229900AbhCWHnb (ORCPT ); Tue, 23 Mar 2021 03:43:31 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 3F05480E5; Tue, 23 Mar 2021 07:44:26 +0000 (UTC) From: Tony Lindgren To: Daniel Lezcano , Thomas Gleixner Cc: Keerthy , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Tero Kristo Subject: [PATCHv2 0/2] Fixes for for dra7 timer wrap errata i940 Date: Tue, 23 Mar 2021 09:43:24 +0200 Message-Id: <20210323074326.28302-1-tony@atomide.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Hi all, Here is v2 set of fixes for dra7 ARM architected timer wrap errata i940 where the timer fails to wrap after 388 days. The workaround is to use two dmtimers as the local timers instead. Note that these patches depend on timer posted mode fixes series "[PATCH 0/3] Fixes for timer-ti-dm systimer posted mode" for the write status register check fix. Also the spurious timer interrupt fix is good to have from that series. Regards, Tony Changes since v1: - Drop pointless irqflags and IRQF_NOBALANCING as noted by Daniel Tony Lindgren (2): clocksource/drivers/timer-ti-dm: Prepare to handle dra7 timer wrap issue clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940 arch/arm/boot/dts/dra7-l4.dtsi | 4 +- arch/arm/boot/dts/dra7.dtsi | 20 +++ drivers/clocksource/timer-ti-dm-systimer.c | 142 +++++++++++++++++---- include/linux/cpuhotplug.h | 1 + 4 files changed, 142 insertions(+), 25 deletions(-)