ppc4xx: Disable POST memory test on NAND-booting Sequoia

[u-boot] / doc / README.at91

diff --git a/doc/README.at91 b/doc/README.at91
index 4e3928a475f5589cfd47ca3c4adcea0b9a52c68f..9b4eae6e143092d03296b949c5e4c330f0a3b57d 100644 (file)
--- a/doc/README.at91
+++ b/doc/README.at91
@@ -2,8 +2,9 @@ Atmel AT91 Evaluation kits
 
 http://atmel.com/dyn/products/tools.asp?family_id=605#1443
 
+I. Board mapping & boot media
 ------------------------------------------------------------------------------
-AT91SAM9260EK & AT91SAM9XEEK
+AT91SAM9260EK, AT91SAM9G20EK & AT91SAM9XEEK
 ------------------------------------------------------------------------------
 
 Memory map
@@ -86,3 +87,13 @@ Environment variables
                make at91sam9263ek_config               - use data flash (spi cs0) (default)
                make at91sam9263ek_nandflash_config     - use nand flash
                make at91sam9263ek_dataflash_cs0_config - use data flash (spi cs0)
+
+II. Watchdog support
+
+       For security reasons, the at91 watchdog is running at boot time and,
+       if deactivated, cannot be used anymore.
+       If you want to use the watchdog, you will need to keep it running in
+       your code (make sure not to disable it in AT91Bootstrap for instance).
+
+       In the U-Boot configuration, the AT91 watchdog support is enabled using
+       the CONFIG_AT91SAM9_WATCHDOG and CONFIG_HW_WATCHDOG options.