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-rw-r--r--include/linux/libps2.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/libps2.h b/include/linux/libps2.h
index afc413369101..b94534b7e266 100644
--- a/include/linux/libps2.h
+++ b/include/linux/libps2.h
@@ -18,11 +18,13 @@
#define PS2_RET_ID 0x00
#define PS2_RET_ACK 0xfa
#define PS2_RET_NAK 0xfe
+#define PS2_RET_ERR 0xfc
#define PS2_FLAG_ACK 1 /* Waiting for ACK/NAK */
#define PS2_FLAG_CMD 2 /* Waiting for command to finish */
#define PS2_FLAG_CMD1 4 /* Waiting for the first byte of command response */
#define PS2_FLAG_WAITID 8 /* Command execiting is GET ID */
+#define PS2_FLAG_NAK 16 /* Last transmission was NAKed */
struct ps2dev {
struct serio *serio;