watchdog: Add multiple device support
We keep the old /dev/watchdog interface file for the first watchdog via
miscdev. This is basically a cut and paste of the relevant interface code
from the rtc driver layer tweaked for watchdog.
Revised to fix problems noted by Hans de Goede
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/include/linux/watchdog.h b/include/linux/watchdog.h
index 1984ea6..508d563 100644
--- a/include/linux/watchdog.h
+++ b/include/linux/watchdog.h
@@ -54,6 +54,8 @@
#ifdef __KERNEL__
#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/cdev.h>
struct watchdog_ops;
struct watchdog_device;
@@ -89,6 +91,8 @@
/** struct watchdog_device - The structure that defines a watchdog device
*
+ * @id: The watchdog's ID. (Allocated by watchdog_register_device)
+ * @cdev: The watchdog's Character device.
* @info: Pointer to a watchdog_info structure.
* @ops: Pointer to the list of watchdog operations.
* @bootstatus: Status of the watchdog device at boot.
@@ -105,6 +109,8 @@
* via the watchdog_set_drvdata and watchdog_get_drvdata helpers.
*/
struct watchdog_device {
+ int id;
+ struct cdev cdev;
const struct watchdog_info *info;
const struct watchdog_ops *ops;
unsigned int bootstatus;