dm: mx6: sabre: Move driver model CONFIGs to Kconfig

[karo-tx-uboot.git] / README

diff --git a/README b/README
index a11e74aff1b923f3c7cd8381305c32640a61a28e..353d8db50062b9a19422126be344e189d7394a4c 100644 (file)
--- a/README
+++ b/README
@@ -1257,6 +1257,9 @@ The following options need to be configured:
                SoC, then define this variable and provide board
                specific code for the "hw_watchdog_reset" function.
 
+               CONFIG_AT91_HW_WDT_TIMEOUT
+               specify the timeout in seconds. default 2 seconds.
+
 - U-Boot Version:
                CONFIG_VERSION_VARIABLE
                If this variable is defined, an environment variable
@@ -2207,6 +2210,17 @@ CBFS (Coreboot Filesystem) support
                requests. Increasing this will allow U-Boot to accept offers
                from a BOOTP client in networks with unusually high latency.
 
+- BOOTP Random transaction ID:
+               CONFIG_BOOTP_RANDOM_ID
+
+               The standard algorithm to generate a DHCP/BOOTP transaction ID
+               by using the MAC address and the current time stamp may not
+               quite unlikely produce duplicate transaction IDs from different
+               clients in the same network. This option creates a transaction
+               ID using the rand() function. Provided that the RNG has been
+               seeded well, this should guarantee unique transaction IDs
+               always.
+
 - DHCP Advanced Options:
                You can fine tune the DHCP functionality by defining
                CONFIG_BOOTP_* symbols:
@@ -3176,8 +3190,13 @@ CBFS (Coreboot Filesystem) support
                This enables the RSA algorithm used for FIT image verification
                in U-Boot. See doc/uImage.FIT/signature.txt for more information.
 
+               The Modular Exponentiation algorithm in RSA is implemented using
+               driver model. So CONFIG_DM needs to be enabled by default for this
+               library to function.
+
                The signing part is build into mkimage regardless of this
-               option.
+               option. The software based modular exponentiation is built into
+               mkimage irrespective of this option.
 
 - bootcount support:
                CONFIG_BOOTCOUNT_LIMIT