linux-kernel - Re: [PATCH V3 1/3] watchdog: imgpdc: Allow timeout to be set in device-tree

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Date:	Sun, 05 Apr 2015 06:03:45 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Andrew Bresticker <abrestic@...omium.org>,
	Wim Van Sebroeck <wim@...ana.be>
CC:	linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ezequiel Garcia <ezequiel.garcia@...tec.com>,
	James Hogan <james.hogan@...tec.com>
Subject: Re: [PATCH V3 1/3] watchdog: imgpdc: Allow timeout to be set in device-tree

On 04/03/2015 10:05 AM, Andrew Bresticker wrote:
> Since the heartbeat is statically initialized to its default value,
> watchdog_init_timeout() will never look in the device-tree for a
> timeout-sec value.  Instead of statically initializing heartbeat,
> fall back to the default timeout value if watchdog_init_timeout()
> fails.
>
> Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
> Cc: Ezequiel Garcia <ezequiel.garcia@...tec.com>
> Cc: James Hogan <james.hogan@...tec.com>

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

> ---
> Changes from v2:
>   - Set timeout before calling watchdog_init_timeout
>   - Don't print an error on watchdog_init_timeout failure
> New for v2.
> ---
>   drivers/watchdog/imgpdc_wdt.c | 10 +++-------
>   1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/watchdog/imgpdc_wdt.c b/drivers/watchdog/imgpdc_wdt.c
> index 0deaa4f..d6826a6 100644
> --- a/drivers/watchdog/imgpdc_wdt.c
> +++ b/drivers/watchdog/imgpdc_wdt.c
> @@ -42,7 +42,7 @@
>   #define PDC_WDT_MIN_TIMEOUT		1
>   #define PDC_WDT_DEF_TIMEOUT		64
>
> -static int heartbeat = PDC_WDT_DEF_TIMEOUT;
> +static int heartbeat;
>   module_param(heartbeat, int, 0);
>   MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds "
>   	"(default=" __MODULE_STRING(PDC_WDT_DEF_TIMEOUT) ")");
> @@ -190,15 +190,11 @@ static int pdc_wdt_probe(struct platform_device *pdev)
>   	pdc_wdt->wdt_dev.info = &pdc_wdt_info;
>   	pdc_wdt->wdt_dev.ops = &pdc_wdt_ops;
>   	pdc_wdt->wdt_dev.max_timeout = 1 << PDC_WDT_CONFIG_DELAY_MASK;
> +	pdc_wdt->wdt_dev.timeout = PDC_WDT_DEF_TIMEOUT;
>   	pdc_wdt->wdt_dev.parent = &pdev->dev;
>   	watchdog_set_drvdata(&pdc_wdt->wdt_dev, pdc_wdt);
>
> -	ret = watchdog_init_timeout(&pdc_wdt->wdt_dev, heartbeat, &pdev->dev);
> -	if (ret < 0) {
> -		pdc_wdt->wdt_dev.timeout = pdc_wdt->wdt_dev.max_timeout;
> -		dev_warn(&pdev->dev,
> -			 "Initial timeout out of range! setting max timeout\n");
> -	}
> +	watchdog_init_timeout(&pdc_wdt->wdt_dev, heartbeat, &pdev->dev);
>
>   	pdc_wdt_stop(&pdc_wdt->wdt_dev);
>
>

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