powerpc/mpc52xx_lpbfifo: optionally defer fifo transfer start
Currently fifo transfer is started when submitting a transfer
request. Add posibility to defer the fifo transfer and start it
later by calling additional function. This change is backward
compatible, the behaviour of mpc52xx_lpbfifo_submit() is the same
for previous driver users, so there is no need to adapt them.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/arch/powerpc/include/asm/mpc52xx.h b/arch/powerpc/include/asm/mpc52xx.h
index 1f41382..0acc7c7c 100644
--- a/arch/powerpc/include/asm/mpc52xx.h
+++ b/arch/powerpc/include/asm/mpc52xx.h
@@ -307,6 +307,7 @@
size_t size;
size_t pos; /* current position of transfer */
int flags;
+ int defer_xfer_start;
/* What to do when finished */
void (*callback)(struct mpc52xx_lpbfifo_request *);
@@ -323,6 +324,7 @@
extern int mpc52xx_lpbfifo_submit(struct mpc52xx_lpbfifo_request *req);
extern void mpc52xx_lpbfifo_abort(struct mpc52xx_lpbfifo_request *req);
extern void mpc52xx_lpbfifo_poll(void);
+extern int mpc52xx_lpbfifo_start_xfer(struct mpc52xx_lpbfifo_request *req);
/* mpc52xx_pic.c */
extern void mpc52xx_init_irq(void);