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-rw-r--r--include/linux/tty.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 1488d8c81aac..26af9816391f 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -23,7 +23,7 @@
*/
#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
-#define NR_LDISCS 19
+#define NR_LDISCS 20
/* line disciplines */
#define N_TTY 0
@@ -47,6 +47,8 @@
#define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
#define N_PPS 18 /* Pulse per Second */
+#define N_AMSDELTA 19 /* codec control over modem, board specific */
+
/*
* This character is the same as _POSIX_VDISABLE: it cannot be used as
* a c_cc[] character, but indicates that a particular special character