From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754313AbbAUXgO (ORCPT ); Wed, 21 Jan 2015 18:36:14 -0500 Received: from bh-25.webhostbox.net ([208.91.199.152]:39705 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752449AbbAUXgK (ORCPT ); Wed, 21 Jan 2015 18:36:10 -0500 Message-ID: <54C037E6.1000208@roeck-us.net> Date: Wed, 21 Jan 2015 15:36:06 -0800 From: Guenter Roeck User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Doug Anderson , Wim Van Sebroeck CC: Heiko Stuebner , Lunxue Dai , Jisheng Zhang , Dinh Nguyen , linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] watchdog: dw_wdt: Try to get a 30 second watchdog by default References: <1421882243-3631-1-git-send-email-dianders@chromium.org> <1421882243-3631-2-git-send-email-dianders@chromium.org> In-Reply-To: <1421882243-3631-2-git-send-email-dianders@chromium.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated_sender: linux@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-CTCH-PVer: 0000001 X-CTCH-Spam: Unknown X-CTCH-VOD: Unknown X-CTCH-Flags: 0 X-CTCH-RefID: str=0001.0A020204.54C037E9.0142,ss=1,re=0.001,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-CTCH-Score: 0.001 X-CTCH-ScoreCust: 0.000 X-CTCH-Rules: C_4847, X-CTCH-SenderID: linux@roeck-us.net X-CTCH-SenderID-Flags: 0 X-CTCH-SenderID-TotalMessages: 18 X-CTCH-SenderID-TotalSpam: 0 X-CTCH-SenderID-TotalSuspected: 0 X-CTCH-SenderID-TotalConfirmed: 0 X-CTCH-SenderID-TotalBulk: 0 X-CTCH-SenderID-TotalVirus: 0 X-CTCH-SenderID-TotalRecipients: 0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: mailgid no entry from get_relayhosts_entry X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/21/2015 03:17 PM, Doug Anderson wrote: > The dw_wdt_set_top() function takes in a value in seconds. In > dw_wdt_open() we were calling it with a value that's supposed to > represent the maximum value programmed into the "top" register with a > comment saying that we were trying to set the watchdog to its maximum > value. Instead we ended up setting the watchdog to ~15 seconds. > > Let's fix this. However, setting things to the "max" gives me an 86 > second watchdog in the system I'm looking at. 86 seconds feels a > little too long. We'll explicitly choose 30 seconds as a more > reasonable value. > > NOTE: Ideally this driver should be transitioned to be a real watchdog > driver. Then we could use "watchdog_init_timeout" and let the timeout > be specified in a number of ways (device tree, module parameter, etc). > This patch should be considered a bit of a stopgap solution. > > Signed-off-by: Doug Anderson > --- Reviewed-by: Guenter Roeck