powerpc/p1010rdb: add readme document for p1010rdb

[karo-tx-uboot.git] / doc / README.fdt-control

diff --git a/doc/README.fdt-control b/doc/README.fdt-control
index 8352835ee948b0637a3c4beb9449cf6280a5072f..5963f78e96117113f03ea86acb8911b987d078a1 100644 (file)
--- a/doc/README.fdt-control
+++ b/doc/README.fdt-control
@@ -142,7 +142,11 @@ join the two:
 
 and then flash image.bin onto your board.
 
-You cannot use both of these options at the same time.
+If CONFIG_OF_HOSTFILE is defined, then it will be read from a file on
+startup. This is only useful for sandbox. Use the -d flag to U-Boot to
+specify the file to read.
+
+You cannot use more than one of these options at the same time.
 
 If you wish to put the fdt at a different address in memory, you can
 define the "fdtcontroladdr" environment variable. This is the hex