relocation: Do not relocate NULL pointers.

[karo-tx-uboot.git] / README

diff --git a/README b/README
index ce86e74baf31ea70b02a7d51e46aa73125fad73a..dee0e674a18c007fa98393db9a7d3b0a70e8a42b 100644 (file)
--- a/README
+++ b/README
@@ -388,6 +388,15 @@ The following options need to be configured:
                This define fills in the correct boot CPU in the boot
                param header, the default value is zero if undefined.
 
+               CONFIG_OF_IDE_FIXUP
+
+               U-Boot can detect if an IDE device is present or not.
+               If not, and this new config option is activated, U-Boot
+               removes the ATA node from the DTS before booting Linux,
+               so the Linux IDE driver does not probe the device and
+               crash. This is needed for buggy hardware (uc101) where
+               no pull down resistor is connected to the signal IDE5V_DD7.
+
 - vxWorks boot parameters:
 
                bootvx constructs a valid bootline using the following