atusb: Document that dfu-util needs to be run before device enters runtime mode

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Kyle McMartin <kyle@kernel.org>

diff --git a/atusb/ChangeLog b/atusb/ChangeLog
index 62b7cefd6cce2e78294d77ce9cd5b5b8fc6b81e3..7e1d96dc8303907bbf0171c04fcf29805516eed1 100644 (file)
--- a/atusb/ChangeLog
+++ b/atusb/ChangeLog
@@ -7,8 +7,12 @@ ChangeLog:
                * Remove FCS frame check from firmware and leave it to the driver
                * Use extended operation mode for TX for automatic ACK handling
 
-To flash the firmware you need dfu-util on the host:
-dfu-util -d 20b7:1540 -D atusb-0.3.dfu
+To flash the firmware you need dfu-util on the host. Issue
+
+    dfu-util -d 20b7:1540 -D atusb-0.3.dfu
+
+right after plugging the device into the USB port while the red led is still
+on.
 
 For the Atmel Raven USB dongle a full JTAG setup is needed to flash the
 firmware as no DFU bootloader is available there.