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From: Guenter Roeck <linux@roeck-us.net>
To: shruthi.sanil@intel.com
Cc: wim@linux-watchdog.org, linux-watchdog@vger.kernel.org,
	linux-kernel@vger.kernel.org, andriy.shevchenko@linux.intel.com,
	kris.pan@linux.intel.com, mgross@linux.intel.com,
	srikanth.thokala@intel.com,
	lakshmi.bai.raja.subramanian@intel.com,
	mallikarjunappa.sangannavar@intel.com
Subject: Re: [PATCH 01/10] watchdog: keembay: Update WDT pre-timeout during the initialization
Date: Wed, 12 May 2021 06:58:06 -0700	[thread overview]
Message-ID: <20210512135806.GA1333995@roeck-us.net> (raw)
In-Reply-To: <20210512084724.14634-2-shruthi.sanil@intel.com>

On Wed, May 12, 2021 at 02:17:15PM +0530, shruthi.sanil@intel.com wrote:
> From: Shruthi Sanil <shruthi.sanil@intel.com>
> 
> The pretimeout register has a default reset value. Hence
> when a smaller WDT timeout is set which would be lesser than the
> default pretimeout, the system behaves abnormally, starts
> triggering the pretimeout interrupt even when the WDT is
> not enabled, most of the times leading to system crash.
> Hence an update in the pre-timeout is also required for the
> default timeout that is being configured.
> 
> Fixes: fa0f8d51e90d ("watchdog: Add watchdog driver for Intel Keembay Soc")
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Tested-by: Kris Pan <kris.pan@intel.com>
> Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  drivers/watchdog/keembay_wdt.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/watchdog/keembay_wdt.c b/drivers/watchdog/keembay_wdt.c
> index 547d3fea33ff..f2f5c9fae29c 100644
> --- a/drivers/watchdog/keembay_wdt.c
> +++ b/drivers/watchdog/keembay_wdt.c
> @@ -29,6 +29,7 @@
>  #define WDT_LOAD_MAX		U32_MAX
>  #define WDT_LOAD_MIN		1
>  #define WDT_TIMEOUT		5
> +#define WDT_PRETIMEOUT		4
>  
>  static unsigned int timeout = WDT_TIMEOUT;
>  module_param(timeout, int, 0);
> @@ -224,11 +225,13 @@ static int keembay_wdt_probe(struct platform_device *pdev)
>  	wdt->wdd.min_timeout	= WDT_LOAD_MIN;
>  	wdt->wdd.max_timeout	= WDT_LOAD_MAX / wdt->rate;
>  	wdt->wdd.timeout	= WDT_TIMEOUT;
> +	wdt->wdd.pretimeout	= WDT_PRETIMEOUT;
>  
>  	watchdog_set_drvdata(&wdt->wdd, wdt);
>  	watchdog_set_nowayout(&wdt->wdd, nowayout);
>  	watchdog_init_timeout(&wdt->wdd, timeout, dev);
>  	keembay_wdt_set_timeout(&wdt->wdd, wdt->wdd.timeout);
> +	keembay_wdt_set_pretimeout(&wdt->wdd, wdt->wdd.pretimeout);
>  
>  	ret = devm_watchdog_register_device(dev, &wdt->wdd);
>  	if (ret)
> -- 
> 2.17.1
> 

  reply	other threads:[~2021-05-12 13:58 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-12  8:47 [PATCH 00/10] Intel Keem Bay WDT bug fixes shruthi.sanil
2021-05-12  8:47 ` [PATCH 01/10] watchdog: keembay: Update WDT pre-timeout during the initialization shruthi.sanil
2021-05-12 13:58   ` Guenter Roeck [this message]
2021-05-12  8:47 ` [PATCH 02/10] watchdog: keembay: Upadate WDT pretimeout for every update in timeout shruthi.sanil
2021-05-12 13:58   ` Guenter Roeck
2021-05-12  8:47 ` [PATCH 03/10] watchdog: keembay: Update pretimeout to zero in the TH ISR shruthi.sanil
2021-05-12 13:58   ` Guenter Roeck
2021-05-12  8:47 ` [PATCH 04/10] watchdog: keembay: Clear either the TO or TH interrupt bit shruthi.sanil
2021-05-12 13:59   ` Guenter Roeck
2021-05-12  8:47 ` [PATCH 05/10] watchdog: keembay: Remove timeout update in the WDT start function shruthi.sanil
2021-05-12 13:59   ` Guenter Roeck
2021-05-12  8:47 ` [PATCH 06/10] watchdog: keembay: Removed timeout update in the TO ISR shruthi.sanil
2021-05-12 14:00   ` Guenter Roeck
2021-05-12  8:47 ` [PATCH 07/10] watchdog: keembay: Update the check in keembay_wdt_resume() shruthi.sanil
2021-05-12 14:02   ` Guenter Roeck
2021-05-13  5:32     ` Sanil, Shruthi
2021-05-12  8:47 ` [PATCH 08/10] watchdog: keembay: MACRO for WDT enable and disable values shruthi.sanil
2021-05-12 14:04   ` Guenter Roeck
2021-05-12  8:47 ` [PATCH 09/10] watchdog: keembay: WDT SMC handler MACRO name update shruthi.sanil
2021-05-12 14:04   ` Guenter Roeck
2021-05-12  8:47 ` [PATCH 10/10] watchdog: keembay: Typo corrections and other blank operations shruthi.sanil
2021-05-12 14:05   ` Guenter Roeck

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