Input: add ps2_drain() to libps2 to allow reading and discarding
given number of bytes from device. Change ps2_command to
allow using 0 as command ID and actually pass it to the
device instead of working as a drain.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/include/linux/libps2.h b/include/linux/libps2.h
index 923bdbc..a710bdd 100644
--- a/include/linux/libps2.h
+++ b/include/linux/libps2.h
@@ -41,6 +41,7 @@
void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
+void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
int ps2_schedule_command(struct ps2dev *ps2dev, unsigned char *param, int command);
int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);