1 files changed, 17 insertions, 19 deletions
diff --git a/nuttx/configs/lpc4330-xplorer/README.txt b/nuttx/configs/lpc4330-xplorer/README.txt
index 68fe3f396..cf60ca0ec 100644
--- a/nuttx/configs/lpc4330-xplorer/README.txt
+++ b/nuttx/configs/lpc4330-xplorer/README.txt
@@ -903,22 +903,20 @@ Where <subdir> is one of the following:
     This configuration has some special options that can be used to
     create a block device on the SPIFI FLASH.  NOTE:  CONFIG_LPC43_SPIFI=y
     must also be defined to enable SPIFI setup support:
- 
-      CONFIG_SPIFI_BLKDRVR - Enable to create a block driver on the SPFI
-        device.
-      CONFIG_SPIFI_DEVNO - SPIFI minor device number.  The SPFI device will
-        be at /dev/ramN, where N is the value of CONFIG_SPIFI_DEVNO.
-        Default: 0.
-      CONFIG_SPIFI_RDONLY - Create a read only device on SPIFI.
-      CONFIG_SPIFI_OFFSET - Offset the beginning of the block driver this
-        many bytes into the device address space.  Default 0.
-      CONFIG_SPIFI_BLKSIZE - The size of one block.  SPIFI is not block
-        oriented, so most any size of the block used in the SPIFI block
-        device can be used.  NOTE: FAT will support only sector sizes of
-        512, 1024, 2048, or 4096. Default: 512
-      CONFIG_SPIFI_NBLOCKS - The number of blocks in the file system,
-        each of size CONFIG_SPIFI_BLKSIZE.  The end of the file system
-        will be at device offset:
-          CONFIG_SPIFI_OFFSET + CONFIG_SPIFI_BLKSIZE*CONFIG_SPIFI_NBLOCKS
-        The must assure that this does offset does not go beyond the end
-        of the FLASH memory.
+
+    SPIFI device geometry:
+
+      CONFIG_SPIFI_OFFSET - Offset the beginning of the block driver this many
+        bytes into the device address space.  This offset must be an exact
+        multiple of the erase block size (CONFIG_SPIFI_BLKSIZE). Default 0.
+     CONFIG_SPIFI_BLKSIZE - The size of one device erase block.  If not defined
+       then the driver will try to determine the correct erase block size by
+       examining that data returned from spifi_initialize (which sometimes
+       seems bad).
+
+    Other SPIFI options
+
+      CONFIG_SPIFI_SECTOR512 - If defined, then the driver will report a more
+        FAT friendly 512 byte sector size and will manage the read-modify-write
+        operations on the larger erase block.
+      CONFIG_SPIFI_READONLY - Define to support only read-only operations.