From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753353AbaBCWez (ORCPT ); Mon, 3 Feb 2014 17:34:55 -0500 Received: from mail-qc0-f170.google.com ([209.85.216.170]:51572 "EHLO mail-qc0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751195AbaBCWex (ORCPT ); Mon, 3 Feb 2014 17:34:53 -0500 From: Soren Brinkmann To: Thomas Gleixner , Daniel Lezcano , Michal Simek Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, =?UTF-8?q?S=C3=B6ren=20Brinkmann?= Subject: [PATCH v3 2/7] time: clockevents: Adjust timer interval when frequency changes Date: Mon, 3 Feb 2014 14:34:32 -0800 Message-Id: <1391466877-28908-3-git-send-email-soren.brinkmann@xilinx.com> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1391466877-28908-1-git-send-email-soren.brinkmann@xilinx.com> References: <1391466877-28908-1-git-send-email-soren.brinkmann@xilinx.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To adjust the timer's interval in periodic mode, the clockevent device is put into periodic mode during clockevents_update_freq() in case the timer is in periodic mode. Cc: Thomas Gleixner Signed-off-by: Soren Brinkmann --- It is assumed that simply calling the timer's 'set_mode()' API takes care of programming an appropriate interval based on the current timer frequency. If that doesn't work for all timers, I guess it might require a new API call. --- kernel/time/clockevents.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 641d91003a45..f85e5fda9c66 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -443,10 +443,13 @@ int __clockevents_update_freq(struct clock_event_device *dev, u32 freq) { clockevents_config(dev, freq); - if (dev->mode != CLOCK_EVT_MODE_ONESHOT) - return 0; + if (dev->mode == CLOCK_EVT_MODE_ONESHOT) + return clockevents_program_event(dev, dev->next_event, false); + + if (dev->mode == CLOCK_EVT_MODE_PERIODIC) + dev->set_mode(CLOCK_EVT_MODE_PERIODIC, dev); - return clockevents_program_event(dev, dev->next_event, false); + return 0; } /** -- 1.8.5.3