wireless/lpwan: Add support for the RN903 and RN2483 family of LoRa

radio transceivers. This initial support includes transmit and receive
functionality and configuration and reading of radio parameters like
frequency and bandwidth.

Signed-off-by: Matteo Golin <matteo.golin@gmail.com>

Author: linguini1

drivers/wireless/lpwan/Kconfig

@@ -5,6 +5,13 @@
 
 if DRIVERS_LPWAN
 
+config LPWAN_RN2XX3
+	bool "Microchip RN2xx3 driver support"
+	default n
+	depends on UART
+	---help---
+		Enable driver support for the RN2xx3 LoRa radio transceiver family.
+
 config LPWAN_SX127X
 	bool "SX127X Low Power Long Range transceiver support"
 	default n

drivers/wireless/lpwan/Make.defs

@@ -26,5 +26,6 @@ ifeq ($(CONFIG_DRIVERS_LPWAN),y)
 
 include wireless/lpwan/sx127x/Make.defs
 include wireless/lpwan/sx126x/Make.defs
+include wireless/lpwan/rn2xx3/Make.defs
 
 endif # CONFIG_DRIVERS_LPWAN

drivers/wireless/lpwan/rn2xx3/CMakeLists.txt

@@ -0,0 +1,25 @@
+# ##############################################################################
+# drivers/wireless/lpwan/rn2xx3/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+if(CONFIG_LPWAN_RN2903)
+  target_sources(drivers PRIVATE rn2xx3.c)
+endif()

drivers/wireless/lpwan/rn2xx3/Make.defs

@@ -0,0 +1,31 @@
+############################################################################
+# drivers/wireless/lpwan/rn2xx3/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifeq ($(CONFIG_LPWAN_RN2XX3),y)
+
+CSRCS += rn2xx3.c
+
+DEPPATH += --dep-path wireless$(DELIM)lpwan$(DELIM)rn2xx3
+VPATH += :wireless$(DELIM)lpwan$(DELIM)rn2xx3
+CFLAGS += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)drivers$(DELIM)wireless$(DELIM)lpwan$(DELIM)rn2xx3
+
+endif # CONFIG_LPWAN_RN2903