modem_cellular: lara_r6: add choice of Radio Access Technology

Add a Kconfig choice to select which Radio Access Technology to be used

Signed-off-by: Emil Lindqvist <emil@lindq.gr>

Author: emillindq

drivers/modem/Kconfig.cellular

@@ -64,4 +64,23 @@ config MODEM_CELLULAR_NEW_BAUDRATE_DELAY
 	default 100 if DT_HAS_U_BLOX_LARA_R6_ENABLED
 	default 300
 
-endif
+if DT_HAS_U_BLOX_LARA_R6_ENABLED
+
+choice MODEM_CELLULAR_RAT
+	prompt "Which Radio Access Technology to use"
+	default MODEM_CELLULAR_RAT_4G
+
+config MODEM_CELLULAR_RAT_4G
+	bool "Use only 4G"
+
+config MODEM_CELLULAR_RAT_4G_3G
+	bool "Use 4G & 3G"
+
+config MODEM_CELLULAR_RAT_4G_3G_2G
+	bool "Use 4G, 3G & 2G"
+
+endchoice
+
+endif #DT_HAS_U_BLOX_LARA_R6_ENABLED
+
+endif #MODEM_CELLULAR

drivers/modem/modem_cellular.c

@@ -2302,6 +2302,13 @@ MODEM_CHAT_SCRIPT_CMDS_DEFINE(u_blox_lara_r6_init_chat_script_cmds,
 			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+CREG?", ok_match),
 			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+CEREG?", ok_match),
 			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGREG?", ok_match),
+#if CONFIG_MODEM_CELLULAR_RAT_4G
+			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+URAT=3", ok_match),
+#elif CONFIG_MODEM_CELLULAR_RAT_4G_3G
+			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+URAT=3,2", ok_match),
+#elif CONFIG_MODEM_CELLULAR_RAT_4G_3G_2G
+			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+URAT=3,2,0", ok_match),
+#endif
 			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGSN", imei_match),
 			      MODEM_CHAT_SCRIPT_CMD_RESP("", ok_match),
 			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGMM", cgmm_match),