6 files changed, 47 insertions, 3 deletions

diff --git a/drivers/staging/mei/init.c b/drivers/staging/mei/init.c
index 69a57e7..cb0ebbe 100644
--- a/drivers/staging/mei/init.c
+++ b/drivers/staging/mei/init.c
@@ -133,6 +133,7 @@ struct mei_device *mei_device_init(struct pci_dev *pdev)
 	init_waitqueue_head(&dev->wait_stop_wd);
 	dev->mei_state = MEI_INITIALIZING;
 	dev->iamthif_state = MEI_IAMTHIF_IDLE;
+	dev->wd_interface_reg = false;
 
 
 	mei_io_list_init(&dev->read_list);
diff --git a/drivers/staging/mei/interface.h b/drivers/staging/mei/interface.h
index 7bcf096..2b5a22c 100644
--- a/drivers/staging/mei/interface.h
+++ b/drivers/staging/mei/interface.h
@@ -23,7 +23,9 @@
 #include "mei_dev.h"
 
 
-#define AMT_WD_VALUE 120	/* seconds */
+#define AMT_WD_DEFAULT_TIMEOUT 120	/* seconds */
+#define AMT_WD_MIN_TIMEOUT 120	/* seconds */
+#define AMT_WD_MAX_TIMEOUT 65535	/* seconds */
 
 #define MEI_WATCHDOG_DATA_SIZE         16
 #define MEI_START_WD_DATA_SIZE         20
diff --git a/drivers/staging/mei/interrupt.c b/drivers/staging/mei/interrupt.c
index ca1e0c9..958a7e2 100644
--- a/drivers/staging/mei/interrupt.c
+++ b/drivers/staging/mei/interrupt.c
@@ -396,6 +396,18 @@ static void mei_client_connect_response(struct mei_device *dev,
 		dev->wd_due_counter = (dev->wd_timeout) ? 1 : 0;
 
 		dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
+
+		/* Registering watchdog interface device once we got connection
+		   to the WD Client
+		*/
+		if (watchdog_register_device(&amt_wd_dev)) {
+			printk(KERN_ERR "mei: unable to register watchdog device.\n");
+			dev->wd_interface_reg = false;
+		} else {
+			dev_dbg(&dev->pdev->dev, "successfully register watchdog interface.\n");
+			dev->wd_interface_reg = true;
+		}
+
 		mei_host_init_iamthif(dev);
 		return;
 	}
diff --git a/drivers/staging/mei/main.c b/drivers/staging/mei/main.c
index 78028f8..c4ebd07 100644
--- a/drivers/staging/mei/main.c
+++ b/drivers/staging/mei/main.c
@@ -241,6 +241,10 @@ static void __devexit mei_remove(struct pci_dev *pdev)
 		mei_disconnect_host_client(dev, &dev->wd_cl);
 	}
 
+	/* Unregistering watchdog device */
+	if (dev->wd_interface_reg)
+		watchdog_unregister_device(&amt_wd_dev);
+
 	/* remove entry if already in list */
 	dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n");
 	mei_remove_client_from_file_list(dev, dev->wd_cl.host_client_id);
diff --git a/drivers/staging/mei/mei_dev.h b/drivers/staging/mei/mei_dev.h
index 2e11077..d434afc 100644
--- a/drivers/staging/mei/mei_dev.h
+++ b/drivers/staging/mei/mei_dev.h
@@ -18,6 +18,7 @@
 #define _MEI_DEV_H_
 
 #include <linux/types.h>
+#include <linux/watchdog.h>
 #include "mei.h"
 #include "hw.h"
 
@@ -37,6 +38,12 @@
 #define MEI_WD_STATE_INDEPENDENCE_MSG_SENT       (1 << 0)
 
 /*
+ * AMT Watchdog Device
+ */
+#define INTEL_AMT_WATCHDOG_ID "INTCAMT"
+extern struct watchdog_device amt_wd_dev;
+
+/*
  * AMTHI Client UUID
  */
 extern const uuid_le mei_amthi_guid;
@@ -258,6 +265,8 @@ struct mei_device {
 	bool iamthif_flow_control_pending;
 	bool iamthif_ioctl;
 	bool iamthif_canceled;
+
+	bool wd_interface_reg;
 };
 
 
diff --git a/drivers/staging/mei/wd.c b/drivers/staging/mei/wd.c
index 721487d..d9e41a7 100644
--- a/drivers/staging/mei/wd.c
+++ b/drivers/staging/mei/wd.c
@@ -19,6 +19,7 @@
 #include <linux/device.h>
 #include <linux/pci.h>
 #include <linux/sched.h>
+#include <linux/watchdog.h>
 
 #include "mei_dev.h"
 #include "hw.h"
@@ -26,13 +27,28 @@
 #include "mei.h"
 
 /*
+ * Watchdog Device structs
+ */
+const struct watchdog_info wd_info = {
+		.identity = INTEL_AMT_WATCHDOG_ID,
+};
+
+struct watchdog_device amt_wd_dev = {
+		.info = &wd_info,
+		.timeout = AMT_WD_DEFAULT_TIMEOUT,
+		.min_timeout = AMT_WD_MIN_TIMEOUT,
+		.max_timeout = AMT_WD_MAX_TIMEOUT,
+};
+
+
+/*
  * MEI Watchdog Module Parameters
  */
-static u16 watchdog_timeout = AMT_WD_VALUE;
+static u16 watchdog_timeout = AMT_WD_DEFAULT_TIMEOUT;
 module_param(watchdog_timeout, ushort, 0);
 MODULE_PARM_DESC(watchdog_timeout,
 		"Intel(R) AMT Watchdog timeout value in seconds. (default="
-					__MODULE_STRING(AMT_WD_VALUE)
+					__MODULE_STRING(AMT_WD_DEFAULT_TIMEOUT)
 					", disable=0)");
 
 static const u8 mei_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };