usb: dwc3: add count field to event buffer

we can cache the last read value of the event
buffer count register on this field, for later
handling.

Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index e7b0679..cdd70cb 100644 (file)
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -370,6 +370,7 @@ struct dwc3_trb;
  * @buf: _THE_ buffer
  * @length: size of this buffer
  * @lpos: event offset
+ * @count: cache of last read event count register
  * @flags: flags related to this event buffer
  * @dma: dma_addr_t
  * @dwc: pointer to DWC controller
@@ -378,6 +379,7 @@ struct dwc3_event_buffer {
        void                    *buf;
        unsigned                length;
        unsigned int            lpos;
+       unsigned int            count;
        unsigned int            flags;
 
 #define DWC3_EVENT_PENDING     BIT(0)