mfd: Update db8500-prmcu hostport_access enable

Force the Modem wakeup by asserting the CaWakeReq signal before the
hostaccess_req/ack ping-pong sequence. The Awake_req signal is de-asserted
asserted at the same time than the hostaccess_req. Return error on failure
case so that the client using this can take appropiate steps.

Signed-off-by: Arun Murthy <arun.murthy@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/include/linux/mfd/dbx500-prcmu.h b/include/linux/mfd/dbx500-prcmu.h
index 5a13f93d8f1c..5b90e94399e1 100644
--- a/include/linux/mfd/dbx500-prcmu.h
+++ b/include/linux/mfd/dbx500-prcmu.h
@@ -345,7 +345,7 @@ static inline u16 prcmu_get_reset_code(void)
         return db8500_prcmu_get_reset_code();
 }
 
-void prcmu_ac_wake_req(void);
+int prcmu_ac_wake_req(void);
 void prcmu_ac_sleep_req(void);
 static inline void prcmu_modem_reset(void)
 {
@@ -533,7 +533,10 @@ static inline u16 prcmu_get_reset_code(void)
         return 0;
 }
 
-static inline void prcmu_ac_wake_req(void) {}
+static inline int prcmu_ac_wake_req(void)
+{
+        return 0;
+}
 
 static inline void prcmu_ac_sleep_req(void) {}