X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=doc%2FREADME.fdt-control;h=5963f78e96117113f03ea86acb8911b987d078a1;hb=944b6ccf1bc436546844536bf62ba62a906ed4e4;hp=85bda035043497d8d23aed8a436e24d630c60937;hpb=606a76f8ef479e42ae4d06f8f3ce87e9a1c72acf;p=u-boot

diff --git a/doc/README.fdt-control b/doc/README.fdt-control
index 85bda03504..5963f78e96 100644
--- 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
@@ -156,6 +160,14 @@ To use this, put something like this in your board header file:
 
 #define CONFIG_EXTRA_ENV_SETTINGS	"fdtcontroladdr=10000\0"
 
+Build:
+
+After board configuration is done, fdt supported u-boot can be build in two ways:
+1)  build the default dts which is defined from CONFIG_DEFAULT_DEVICE_TREE
+    $ make
+2)  build the user specified dts file
+    $ make DEVICE_TREE=<dts-file-name>
+
 
 Limitations
 -----------