usb: otg-fsm: support multiple instances

Move the state_changed variable into struct otg_fsm
so that we can support multiple instances.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c
index 504708f..9059b7d 100644 (file)
--- a/drivers/usb/common/usb-otg-fsm.c
+++ b/drivers/usb/common/usb-otg-fsm.c
@@ -61,8 +61,6 @@ static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
        return 0;
 }
 
-static int state_changed;
-
 /* Called when leaving a state.  Do state clean up jobs here */
 static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
 {
@@ -208,7 +206,6 @@ static void otg_start_hnp_polling(struct otg_fsm *fsm)
 /* Called when entering a state */
 static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
 {
-       state_changed = 1;
        if (fsm->otg->state == new_state)
                return 0;
        VDBG("Set state: %s\n", usb_otg_state_string(new_state));
@@ -324,6 +321,7 @@ static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
        }
 
        fsm->otg->state = new_state;
+       fsm->state_changed = 1;
        return 0;
 }
 
@@ -335,7 +333,7 @@ int otg_statemachine(struct otg_fsm *fsm)
        mutex_lock(&fsm->lock);
 
        state = fsm->otg->state;
-       state_changed = 0;
+       fsm->state_changed = 0;
        /* State machine state change judgement */
 
        switch (state) {
@@ -448,7 +446,7 @@ int otg_statemachine(struct otg_fsm *fsm)
        }
        mutex_unlock(&fsm->lock);
 
-       VDBG("quit statemachine, changed = %d\n", state_changed);
-       return state_changed;
+       VDBG("quit statemachine, changed = %d\n", fsm->state_changed);
+       return fsm->state_changed;
 }
 EXPORT_SYMBOL_GPL(otg_statemachine);

diff --git a/include/linux/usb/otg-fsm.h b/include/linux/usb/otg-fsm.h
index 8eec0c2..7a03505 100644 (file)
--- a/include/linux/usb/otg-fsm.h
+++ b/include/linux/usb/otg-fsm.h
@@ -210,6 +210,7 @@ struct otg_fsm {
        struct mutex lock;
        u8 *host_req_flag;
        struct delayed_work hnp_polling_work;
+       bool state_changed;
 };
 
 struct otg_fsm_ops {