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watchdog: WatchDog Timer Driver Core - Add basic ioctl functionality

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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@lxorguk.ukuu.org.uk>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
This commit is contained in:
Wim Van Sebroeck
2011-07-22 18:56:38 +00:00
parent 43316044d4
commit 2fa03560ab
3 changed files with 42 additions and 0 deletions
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4
include/linux/watchdog.h
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@@ -68,6 +68,7 @@ struct watchdog_device;
* @start: The routine for starting the watchdog device.
* @stop: The routine for stopping the watchdog device.
* @ping: The routine that sends a keepalive ping to the watchdog device.
* @status: The routine that shows the status of the watchdog device.
*
* The watchdog_ops structure contains a list of low-level operations
* that control a watchdog device. It also contains the module that owns
@@ -81,12 +82,14 @@ struct watchdog_ops {
int (*stop)(struct watchdog_device *);
/* optional operations */
int (*ping)(struct watchdog_device *);
unsigned int (*status)(struct watchdog_device *);
};
/** struct watchdog_device - The structure that defines a watchdog device
*
* @info: Pointer to a watchdog_info structure.
* @ops: Pointer to the list of watchdog operations.
* @bootstatus: Status of the watchdog device at boot.
* @driver-data:Pointer to the drivers private data.
* @status: Field that contains the devices internal status bits.
*
@@ -99,6 +102,7 @@ struct watchdog_ops {
struct watchdog_device {
const struct watchdog_info *info;
const struct watchdog_ops *ops;
unsigned int bootstatus;
void *driver_data;
unsigned long status;
/* Bit numbers for status flags */