The Mikroe STM32 F4 board now uses /dev/config for configuration data storage. From Ken Pettit

configs/mikroe-stm32f4/Kconfig

@@ -31,12 +31,28 @@ config MIKROE_FLASH_PART
 	---help---
 		Enables creation of partitions on the FLASH
 
+config MIKROE_FLASH_CONFIG_PART
+	bool "Create application config data partition on FLASH"
+	default y
+	depends on MIKROE_FLASH_PART
+	depends on PLATFORM_CONFIGDATA
+	---help---
+		Enables creation of a /dev/config partition on the FLASH
+
+config MIKROE_FLASH_CONFIG_PART_NUMBER
+	int "Index number of config partition (in list below)"
+	default 0
+	depends on MIKROE_FLASH_CONFIG_PART
+	---help---
+		Specifies the index number of the config data partition
+		from the partition list.
+
 config MIKROE_FLASH_PART_LIST
 	string "Flash partition size list"
-    default "256,768"
+	default "8,248,768"
 	depends on MIKROE_FLASH_PART
 	---help---
-		Comma separated list of partition sizes in KB
+		Comma separated list of partition sizes in KB.
 
 config MIKROE_RAMMTD
 	bool "MTD driver for SMARTFS RAM disk"

configs/mikroe-stm32f4/src/up_nsh.c

@@ -59,6 +59,12 @@
 #  include <apps/usbmonitor.h>
 #endif
 
+#ifdef CONFIG_MIKROE_FLASH_CONFIG_PART
+#ifdef CONFIG_PLATFORM_CONFIGDATA
+#  include <nuttx/configdata.h>
+#endif
+#endif
+
 #ifdef CONFIG_STM32_OTGFS
 #  include "stm32_usbhost.h"
 #endif
@@ -227,6 +233,7 @@ int nsh_archinitialize(void)
         partno = 0;
         ptr = partstring;
         partoffset = 0;
+
         while (*ptr != '\0')
           {
             /* Get the partition size */
@@ -235,12 +242,27 @@ int nsh_archinitialize(void)
             mtd_part = mtd_partition(mtd, partoffset, (partsize>>2)*16);
             partoffset += (partsize >> 2) * 16;
 
-            /* Now initialize a SMART Flash block device and bind it to the MTD device */
+#ifdef CONFIG_MIKROE_FLASH_CONFIG_PART
+            /* Test if this is the config partition */
+
+            if (CONFIG_MIKROE_FLASH_CONFIG_PART_NUMBER == partno)
+              {
+                /* Register the partition as the config device */
+
+                mtdconfig_register(mtd_part);
+              }
+            else
+#endif
+              {
+                /* Now initialize a SMART Flash block device and bind it
+                 * to the MTD device.
+                 */
 
 #if defined(CONFIG_MTD_SMART) && defined(CONFIG_FS_SMARTFS)
                 sprintf(partname, "p%d", partno);
                 smart_initialize(CONFIG_MIKROE_FLASH_MINOR, mtd_part, partname);
 #endif
+              }
 
             /* Update the pointer to point to the next size in the list */
 
@@ -258,7 +280,6 @@ int nsh_archinitialize(void)
 
             partno++;
           }
-      }
 #else /* CONFIG_MIKROE_FLASH_PART */
 
         /* Configure the device with no partition support */
@@ -267,6 +288,7 @@ int nsh_archinitialize(void)
 
 #endif /* CONFIG_MIKROE_FLASH_PART */
       }
+    }
 
   /* Create a RAM MTD device if configured */
 
@@ -308,7 +330,6 @@ int nsh_archinitialize(void)
   else
     {
       message("nsh_archinitialize: Successfully bound SPI to the MMC/SD driver\n");
-
     }
 #endif