Merge branch 'master' of git://www.denx.de/git/u-boot-usb

diff --combined README
index 8e19aebb9c9ff34baecedb5a0c94afe3a35e0e3e,b0c2fdc73de47c1ef774093caea4f6b156703af2..a70475fb05f024e1b580317c0e8723ad4a574c73
--- 1/README
--- 2/README
+++ b/README
@@@ -848,7 -848,6 +848,7 @@@ The following options need to be config
                CONFIG_CMD_ELF          * bootelf, bootvx
                CONFIG_CMD_ENV_CALLBACK * display details about env callbacks
                CONFIG_CMD_ENV_FLAGS    * display details about env flags
 +              CONFIG_CMD_ENV_EXISTS   * check existence of env variable
                CONFIG_CMD_EXPORTENV    * export the environment
                CONFIG_CMD_EXT2         * ext2 command support
                CONFIG_CMD_EXT4         * ext4 command support
@@@ -1033,6 -1032,7 +1033,6 @@@
  
  - GPIO Support:
                CONFIG_PCA953X          - use NXP's PCA953X series I2C GPIO
 -              CONFIG_PCA953X_INFO     - enable pca953x info command
  
                The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of
                chip-ngpio pairs that tell the PCA953X driver the number of
@@@ -1367,6 -1367,13 +1367,13 @@@
                        for your device
                        - CONFIG_USBD_PRODUCTID 0xFFFF
  
+               Some USB device drivers may need to check USB cable attachment.
+               In this case you can enable following config in BoardName.h:
+                       CONFIG_USB_CABLE_CHECK
+                       This enables function definition:
+                       - usb_cable_connected() in include/usb.h
+                       Implementation of this function is board-specific.
+ 
  - ULPI Layer Support:
                The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via
                the generic ULPI layer. The generic layer accesses the ULPI PHY