From patchwork Wed Aug 10 03:52:03 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hemant Pedanekar X-Patchwork-Id: 1051632 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p7A3qeEC006668 for ; Wed, 10 Aug 2011 03:52:40 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751998Ab1HJDw0 (ORCPT ); Tue, 9 Aug 2011 23:52:26 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:56067 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751351Ab1HJDwZ (ORCPT ); Tue, 9 Aug 2011 23:52:25 -0400 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id p7A3qBAO019580 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 9 Aug 2011 22:52:14 -0500 Received: from dbde71.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id p7A3q84D028987; Wed, 10 Aug 2011 09:22:09 +0530 (IST) Received: from dbdp31.itg.ti.com (172.24.170.98) by DBDE71.ent.ti.com (172.24.170.149) with Microsoft SMTP Server id 8.3.106.1; Wed, 10 Aug 2011 09:22:08 +0530 Received: from psplinux052.india.ti.com (psplinux052.india.ti.com [172.24.162.245]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p7A3q5BU023611; Wed, 10 Aug 2011 09:22:06 +0530 (IST) Received: from psplinux052.india.ti.com (localhost [127.0.0.1]) by psplinux052.india.ti.com (8.13.1/8.13.1) with ESMTP id p7A3q5g1022882; Wed, 10 Aug 2011 09:22:05 +0530 Received: (from a0393588@localhost) by psplinux052.india.ti.com (8.13.1/8.13.1/Submit) id p7A3q47Q022871; Wed, 10 Aug 2011 09:22:04 +0530 From: Hemant Pedanekar To: CC: Tony Lindgren , Russell King , , , Hemant Pedanekar Subject: [PATCH] omap: timer: Set dmtimer used as clocksource in autoreload mode Date: Wed, 10 Aug 2011 09:22:03 +0530 Message-ID: <1312948323-22823-1-git-send-email-hemantp@ti.com> X-Mailer: git-send-email 1.7.3.5 MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Wed, 10 Aug 2011 03:52:40 +0000 (UTC) If CONFIG_OMAP_32K_TIMER is not selected and dmtimer is used as clocksource, the timer stops counting once overflow occurs as it was not set in autoreload mode. This results into timekeeping failure: for example, 'sleep 1' at the shell after the timer counter overflow would hang. This patch sets up autoreload when starting the clocksource timer which fixes the above issue. Signed-off-by: Hemant Pedanekar --- arch/arm/mach-omap2/timer.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c index e964072..796b935 100644 --- a/arch/arm/mach-omap2/timer.c +++ b/arch/arm/mach-omap2/timer.c @@ -293,7 +293,7 @@ static void __init omap2_gp_clocksource_init(int gptimer_id, pr_info("OMAP clocksource: GPTIMER%d at %lu Hz\n", gptimer_id, clksrc.rate); - __omap_dm_timer_load_start(clksrc.io_base, OMAP_TIMER_CTRL_ST, 0, 1); + omap_dm_timer_set_load_start(&clksrc, 1, 0); init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate); if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))