--- zzzz-none-000/linux-4.1.52/include/uapi/linux/tty.h	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/include/uapi/linux/tty.h	2022-03-02 11:37:13.000000000 +0000
@@ -34,5 +34,10 @@
 #define N_TI_WL		22	/* for TI's WL BT, FM, GPS combo chips */
 #define N_TRACESINK	23	/* Trace data routing for MIPI P1149.7 */
 #define N_TRACEROUTER	24	/* Trace data routing for MIPI P1149.7 */
+#ifdef CONFIG_BCM_KF_PHONET
+#define N_BRCM_HCI	25	/* Broadcom Bluetooth HCI */
+#define N_PHONET	26	/* PHONET over USB/ACM */
+#define N_LDTMODEM	27	/* Line discipline for Thin Modem support */
+#endif
 
 #endif /* _UAPI_LINUX_TTY_H */