From patchwork Thu Mar 4 07:37:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 393986 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=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 538A0C433DB for ; Thu, 4 Mar 2021 07:39:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 29A8864EFD for ; Thu, 4 Mar 2021 07:39:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232523AbhCDHii (ORCPT ); Thu, 4 Mar 2021 02:38:38 -0500 Received: from muru.com ([72.249.23.125]:39326 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232707AbhCDHiY (ORCPT ); Thu, 4 Mar 2021 02:38:24 -0500 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id D889F80A3; Thu, 4 Mar 2021 07:38:21 +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: [PATCH 0/2] Fixes for for dra7 timer wrap errata i940 Date: Thu, 4 Mar 2021 09:37:35 +0200 Message-Id: <20210304073737.15810-1-tony@atomide.com> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Hi all, Here are fixes for dra7 ARM architected timer wrap errata i940 where it 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 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 | 148 +++++++++++++++++---- include/linux/cpuhotplug.h | 1 + 4 files changed, 148 insertions(+), 25 deletions(-)