diff -drupN a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
--- a/drivers/bluetooth/hci_uart.h	2017-10-21 18:09:07.000000000 +0300
+++ b/drivers/bluetooth/hci_uart.h	2022-06-09 05:02:28.000000000 +0300
@@ -23,6 +23,12 @@
  *
  */
 
+#ifdef CONFIG_BT_HCIUART_RTKH5
+#define BTCOEX
+#define HCI_VERSION_CODE LINUX_VERSION_CODE
+#endif
+
+
 #ifndef N_HCI
 #define N_HCI	15
 #endif
@@ -92,7 +98,11 @@ struct hci_uart {
 };
 
 /* HCI_UART proto flag bits */
-#define HCI_UART_PROTO_SET	0
+#ifdef CONFIG_BT_HCIUART_RTKH5
+#define HCI_UART_PROTO_SET      2
+#else
+#define HCI_UART_PROTO_SET      0
+#endif
 #define HCI_UART_REGISTERED	1
 
 /* TX states  */
@@ -158,6 +168,12 @@ int ll_init(void);
 int ll_deinit(void);
 #endif
 
+#ifdef CONFIG_BT_HCIUART_RTKH5
+int h5_init(void);
+int h5_deinit(void);
+#endif
+
+
 #ifdef CONFIG_BT_HCIUART_ATH3K
 int ath_init(void);
 int ath_deinit(void);