From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753891Ab3KQCYt (ORCPT ); Sat, 16 Nov 2013 21:24:49 -0500 Received: from mail.active-venture.com ([67.228.131.205]:54308 "EHLO mail.active-venture.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753591Ab3KQCYk (ORCPT ); Sat, 16 Nov 2013 21:24:40 -0500 X-Originating-IP: 108.223.40.66 Message-ID: <528828E7.6060404@roeck-us.net> Date: Sat, 16 Nov 2013 18:24:39 -0800 From: Guenter Roeck User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0 MIME-Version: 1.0 To: "ivan.khoronzhuk" , Santosh Shilimkar , wim@iguana.be, nsekhar@ti.com, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org CC: grant.likely@linaro.org, rob.herring@calxeda.com, pawel.moll@arm.com, mark.rutland@arm.com, swarren@wwwdotorg.org, galak@kernel.crashing.org, ijc+devicetree@hellion.org.uk, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: Fwd: [PATCH 4/8] watchdog: davinci: add GET_STATUS option support References: <1383680783-12114-5-git-send-email-ivan.khoronzhuk@ti.com> <527A28CE.2070802@ti.com> In-Reply-To: <527A28CE.2070802@ti.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/06/2013 03:32 AM, ivan.khoronzhuk wrote: > When watchdog timer is expired we can know about it thought thought -> through or with > GET_STATUS ioctl option. > > Signed-off-by: Ivan Khoronzhuk > --- > drivers/watchdog/davinci_wdt.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c > index 6cbf2e1..a371b2d 100644 > --- a/drivers/watchdog/davinci_wdt.c > +++ b/drivers/watchdog/davinci_wdt.c > @@ -144,6 +144,18 @@ static unsigned int davinci_wdt_get_timeleft(struct watchdog_device *wdd) > return wdd->timeout - timer_counter; > } > > +static unsigned int davinci_wdt_status(struct watchdog_device *wdd) > +{ > + u32 val; > + struct davinci_wdt_device *davinci_wdt = watchdog_get_drvdata(wdd); > + > + val = ioread32(davinci_wdt->base + WDTCR); > + if (val & WDFLAG) > + return WDIOF_CARDRESET; > + "Card previously reset the CPU" Is this really accurate / correct ? My understanding is that the status is supposed to return the reason for a previous reset/reboot, not the curent condition. > + return 0; > +} > + > static const struct watchdog_info davinci_wdt_info = { > .options = WDIOF_KEEPALIVEPING, > .identity = "DaVinci Watchdog", > @@ -155,6 +167,7 @@ static const struct watchdog_ops davinci_wdt_ops = { > .stop = davinci_wdt_ping, > .ping = davinci_wdt_ping, > .get_timeleft = davinci_wdt_get_timeleft, > + .status = davinci_wdt_status, > }; > > static int davinci_wdt_probe(struct platform_device *pdev) >