drivers/mtd/mx25rxx.c: add support for 512B sectors

- Fix for mx25rxx driver as it does not work properly
- Add mx25rxx memory chip & smartfs support in b-l475e-iot01a/nsh config
- Update smartfs smart_scan() function

arch/arm/src/stm32l4/Kconfig

@@ -1182,7 +1182,7 @@ if STM32L4_QSPI
 config STM32L4_QSPI_FLASH_SIZE
 	int "Size of attached serial flash, bytes"
 	default 16777216
-	range 1 2147483648
+	range 1 2147483647
 	---help---
 		The STM32L4 QSPI peripheral requires the size of the Flash be specified
 

configs/b-l475e-iot01a/Kconfig

@@ -6,7 +6,7 @@
 if ARCH_BOARD_B_L475E_IOT01A
 
 config B_L475E_IOT01A_MTD_FLASH
-	bool "MTD driver for external 64Mbytes flash memory"
+	bool "MTD driver for external 64Mbits flash memory"
 	default n
 	select STM32L4_DMA1
 	select STM32L4_QSPI

configs/b-l475e-iot01a/nsh/defconfig

@@ -16,6 +16,9 @@ CONFIG_ARCH_CHIP_STM32L4=y
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_BOARD_LOOPSPERMSEC=8025
 CONFIG_BUILTIN=y
+CONFIG_B_L475E_IOT01A_MTD_FLASH=y
+CONFIG_B_L475E_IOT01A_MTD_PART=y
+CONFIG_B_L475E_IOT01A_MTD_PART_LIST="16,64,128,128"
 CONFIG_FS_PROCFS=y
 CONFIG_HAVE_CXX=y
 CONFIG_HAVE_CXXINITIALIZE=y
@@ -23,10 +26,13 @@ CONFIG_INTELHEX_BINARY=y
 CONFIG_MAX_TASKS=16
 CONFIG_MAX_WDOGPARMS=2
 CONFIG_MM_REGIONS=2
+CONFIG_MTD_SMART_SECTOR_SIZE=512
+CONFIG_MX25RXX_SECTOR512=y
 CONFIG_NFILE_DESCRIPTORS=8
 CONFIG_NFILE_STREAMS=8
 CONFIG_NSH_ARCHINIT=y
 CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_DISABLE_LOSMART=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_LINELEN=64
 CONFIG_NSH_READLINE=y
@@ -42,6 +48,7 @@ CONFIG_SDCLONE_DISABLE=y
 CONFIG_START_DAY=6
 CONFIG_START_MONTH=12
 CONFIG_START_YEAR=2011
+CONFIG_STM32L4_QSPI_FLASH_SIZE=8388608
 CONFIG_STM32L4_USART1=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_USART1_SERIAL_CONSOLE=y

configs/b-l475e-iot01a/src/stm32_bringup.c

@@ -1,7 +1,7 @@
 /****************************************************************************
  * config/b-l475e-iot01a/src/stm32_bringup.c
  *
- *   Copyright (C) 2017-2018 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2017-2019 Gregory Nutt. All rights reserved.
  *   Author: Simon Piriou <spiriou31@gmail.com>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -182,8 +182,15 @@ int stm32l4_bringup(void)
               }
 
             mtd_part = mtd_partition(g_mtd_fs, partoffset,
-                                     partszbytes / erasesize);
+                                     partszbytes / geo.blocksize);
-            partoffset += partszbytes / erasesize;
+            partoffset += partszbytes / geo.blocksize;
+
+            if (!mtd_part)
+              {
+                syslog(LOG_ERR, "Failed to create part %d, size=%d\n",
+                       partno, partsize);
+                goto process_next_part;
+              }
 
 #if defined(CONFIG_MTD_SMART) && defined(CONFIG_FS_SMARTFS)
             /* Now initialize a SMART Flash block device and bind it to the MTD

drivers/mtd/Kconfig

@@ -641,6 +641,10 @@ config MX25RXX_QSPI_READ_FREQUENCY
 		Clock frequency for read data command.
 		Only Quad read is supported in this driver.
 
+config MX25RXX_SECTOR512
+	bool "Simulate 512 byte Erase Blocks"
+	default n
+
 endif # MTD_MX25RXX
 
 config MTD_SMART

drivers/mtd/smart.c

@@ -1879,7 +1879,7 @@ static int smart_scan(FAR struct smart_struct_s *dev)
         {
           /* Read the next sector from the device */
 
-          ret = MTD_READ(dev->mtd, 0, sizeof(struct smart_sect_header_s),
+          ret = MTD_READ(dev->mtd, readaddress, sizeof(struct smart_sect_header_s),
                          (FAR uint8_t *) &header);
           if (ret != sizeof(struct smart_sect_header_s))
             {