Clicker2-STM32: Add logic to register the MRF24J40 radio character device.

configs/clicker2-stm32/src/stm32_mrf24j40.c

@@ -65,7 +65,12 @@
 #  error Wireless support requires CONFIG_DRIVERS_WIRELESS
 #endif
 
-#if !defined(CONFIG_CLICKER2_STM32_MB1_BEE) && !defined(CONFIG_CLICKER2_STM32_MB2_BEE)
+#ifndef CONFIG_IEEE802154_DEV
+#  error IEEE802.15.4 radio character device required (CONFIG_IEEE802154_DEV)
+#endif
+
+#if !defined(CONFIG_CLICKER2_STM32_MB1_BEE) && \
+    !defined(CONFIG_CLICKER2_STM32_MB2_BEE)
 #  error Only the Mikroe BEE board is supported
 #endif
 
@@ -81,6 +86,8 @@
 #  endif
 #endif
 
+#define RADIO_DEVNAME "/dev/mrf24j40"
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -239,8 +246,19 @@ static int stm32_mrf24j40_devsetup(FAR struct stm32_priv_s *priv)
       return -ENODEV;
     }
 
-  /* Now.. do what with the MRF24J40 instance? */
-#warning Missing logic
+#ifdef CONFIG_IEEE802154_DEV
+  /* Register a character driver to access the IEEE 802.15.4 radio from
+   *   user-space
+   */
+
+  ret = radio802154dev_register(radio, RADIO_DEVNAME);
+  if (ret < 0)
+    {
+      wlerr("ERROR: Failed to register the radio device %s: %d\n",
+            RADIO_DEVNAME, ret);
+      return ret;
+    }
+#endif
 
   return OK;
 }

include/nuttx/wireless/ieee802154/at86rf23x.h

@@ -91,8 +91,9 @@ extern "C"
  *
  ****************************************************************************/
 
-FAR struct ieee802154_radio_s *at86rf23x_init(FAR struct spi_dev_s *spi,
-                                              FAR const struct at86rf23x_lower_s *lower);
+FAR struct ieee802154_radio_s *
+  at86rf23x_init(FAR struct spi_dev_s *spi,
+                 FAR const struct at86rf23x_lower_s *lower);
 
 #undef EXTERN
 #ifdef __cplusplus

include/nuttx/wireless/ieee802154/ieee802154_radio.h

@@ -170,6 +170,28 @@ extern "C"
  * Public Function Prototypes
  ****************************************************************************/
 
+/****************************************************************************
+ * Name: radio802154dev_register
+ *
+ * Description:
+ *   Register a character driver to access the IEEE 802.15.4 radio from
+ *   user-space
+ *
+ * Input Parameters:
+ *   radio - Pointer to the radio struct to be registerd.
+ *   devname - The name of the IEEE 802.15.4 radio to be registered.
+ *
+ * Returned Values:
+ *   Zero (OK) is returned on success.  Otherwise a negated errno value is
+ *   returned to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_IEEE802154_DEV
+int radio802154dev_register(FAR struct ieee802154_radio_s *radio,
+                            FAR char *devname);
+#endif
+
 #undef EXTERN
 #ifdef __cplusplus
 }

wireless/ieee802154/radio802154_device.c

@@ -466,6 +466,10 @@ static int radio802154dev_ioctl(FAR struct file *filep, int cmd,
   return ret;
 }
 
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
 /****************************************************************************
  * Name: radio802154dev_register
  *