linux-kernel - Re: [RFC] [PATCH 2/10] Generic Watchdog Timer Driver

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Date:	Thu, 24 Feb 2011 09:49:22 +0000
From:	Jamie Iles <jamie@...ieiles.com>
To:	Wim Van Sebroeck <wim@...ana.be>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linux Watchdog Mailing List <linux-watchdog@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [RFC] [PATCH 2/10] Generic Watchdog Timer Driver

On Wed, Feb 23, 2011 at 09:42:28PM +0100, Wim Van Sebroeck wrote:
> commit 79a856016f4f4314360d6efbbbc334828006a79f
> Author: Wim Van Sebroeck <wim@...ana.be>
> Date:   Fri Jun 18 08:58:13 2010 +0000
> 
>     watchdog: WatchDog Timer Driver Core - Part 2
>     
>     This part add's the basic ioctl functionality to the
>     WatchDog Timer Driver Core framework. The supported
>     ioctl call's are:
>     	WDIOC_GETSUPPORT
>     	WDIOC_GETSTATUS
>     	WDIOC_GETBOOTSTATUS
>     
>     Signed-off-by: Alan Cox <alan@...rguk.ukuu.org.uk>
>     Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
> 
> diff --git a/Documentation/watchdog/src/watchdog-with-timer-example.c b/Documentation/watchdog/src/watchdog-with-timer-example.c
> index d0b6056..ed7852a 100644
> --- a/Documentation/watchdog/src/watchdog-with-timer-example.c
> +++ b/Documentation/watchdog/src/watchdog-with-timer-example.c
> @@ -115,6 +115,10 @@ static int wdt_stop(struct watchdog_device *wdd)
>  /*
>   * The watchdog kernel structures
>   */
> +static const struct watchdog_info wdt_info = {
> +	.identity =	DRV_NAME,
> +};
> +
>  static const struct watchdog_ops wdt_ops = {
>  	.start =	wdt_start,
>  	.stop =		wdt_stop,
> @@ -123,6 +127,7 @@ static const struct watchdog_ops wdt_ops = {
>  
>  static struct watchdog_device wdt_dev = {
>  	.name =		DRV_NAME,
> +	.info =		&wdt_info,
>  	.ops =		&wdt_ops,
>  };
>  
> diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt
> index e69d1cc..9418d4c 100644
> --- a/Documentation/watchdog/watchdog-kernel-api.txt
> +++ b/Documentation/watchdog/watchdog-kernel-api.txt
> @@ -40,13 +40,19 @@ The watchdog device structure looks like this:
>  
>  struct watchdog_device {
>  	char *name;
> +	const struct watchdog_info *info;
>  	const struct watchdog_ops *ops;
> +	int bootstatus;
>  	long status;
>  };
>  
>  It contains following fields:
>  * name: a pointer to the (preferably unique) name of the watchdog timer device.
> +* info: a pointer to a watchdog_info structure. This structure gives some
> +  additional information about the watchdog timer itself.
>  * ops: a pointer to the list of watchdog operations that the watchdog supports.
> +* bootstatus: status of the device after booting (reported with watchdog
> +  WDIOF_* status bits).
>  * status: this field contains a number of status bits that give extra
>    information about the status of the device (Like: is the device opened via
>    the /dev/watchdog interface or not, ...)
> @@ -59,6 +65,7 @@ struct watchdog_ops {
>  	int (*stop)(struct watchdog_device *);
>  	/* optional operations */
>  	int (*ping)(struct watchdog_device *);
> +	int (*status)(struct watchdog_device *);

It looks like the actual addition of .status to watchdog_ops happens in 
the next patch rather than this one.

Jamie
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