add example for file on VFAT filesystem usage

For example on a raspberry pi the u-boot environment can be
saved in a file on the first VFAT partition.
This example illustrates how to use it with fw_printenv/fw_setenv.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

diff --git a/tools/env/fw_env.config b/tools/env/fw_env.config
index c9b9f6a16091f1969559f8b0b4eabbcaa47cec45..6f216f9c64c6ec1acf40fcc28fe2af08a4e9ffaf 100644 (file)
--- a/tools/env/fw_env.config
+++ b/tools/env/fw_env.config
@@ -20,3 +20,6 @@
 
 # Block device example
 #/dev/mmcblk0          0xc0000         0x20000
+
+# VFAT example
+#/boot/uboot.env       0x0000          0x4000