mei: me: add runtime pm framework

Add runtime pm framework for ME devices.
The runtime pm handlers are used to run
me power gating isolation protocol

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

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index a725365e2150..b9a4bb5921f1 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -19,6 +19,7 @@
 #include <linux/sched.h>
 #include <linux/wait.h>
 #include <linux/mei.h>
+#include <linux/pm_runtime.h>
 
 #include "mei_dev.h"
 #include "hbm.h"
@@ -742,6 +743,13 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
                 dev->pg_event = MEI_PG_EVENT_RECEIVED;
                 if (waitqueue_active(&dev->wait_pg))
                         wake_up(&dev->wait_pg);
+                else
+                        /*
+                        * If the driver is not waiting on this then
+                        * this is HW initiated exit from PG.
+                        * Start runtime pm resume sequence to exit from PG.
+                        */
+                        pm_request_resume(&dev->pdev->dev);
                 break;
 
         case HOST_CLIENT_PROPERTIES_RES_CMD: