mei: add debugfs hooks

debugfs exposes device state and list of me clients and their
properties

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 18 insertions, 2 deletions

diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 325f71abeb7a..8806be420f6b 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -437,6 +437,11 @@ struct mei_device {
         /* List of bus devices */
         struct list_head device_list;
 
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+        struct dentry *dbgfs_dir;
+#endif /* CONFIG_DEBUG_FS */
+
+
         const struct mei_hw_ops *ops;
         char hw[0] __aligned(sizeof(void *));
 };
@@ -603,8 +608,19 @@ static inline int mei_count_full_read_slots(struct mei_device *dev)
         return dev->ops->rdbuf_full_slots(dev);
 }
 
-int mei_register(struct device *dev);
-void mei_deregister(void);
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+int mei_dbgfs_register(struct mei_device *dev, const char *name);
+void mei_dbgfs_deregister(struct mei_device *dev);
+#else
+static inline int mei_dbgfs_register(struct mei_device *dev, const char *name)
+{
+        return 0;
+}
+static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
+#endif /* CONFIG_DEBUG_FS */
+
+int mei_register(struct mei_device *dev);
+void mei_deregister(struct mei_device *dev);
 
 #define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d"
 #define MEI_HDR_PRM(hdr)                  \