X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=doc%2FREADME.davinci;h=5f1bdc836c437f8f10a02b669602cd31ba5db138;hb=0a59b7118b1bd26620967c0d1b4addc81835b662;hp=a2e96a5a21e795830ad89f77c88b44f67bfea558;hpb=718f746427b6eb4b9e38a9562e689a268cd65b35;p=u-boot

diff --git a/doc/README.davinci b/doc/README.davinci
index a2e96a5a21..5f1bdc836c 100644
--- a/doc/README.davinci
+++ b/doc/README.davinci
@@ -95,6 +95,20 @@ into the RAM.
 The programmers and UBL are always released as part of any standard TI
 software release associated with an SOC.
 
+Environment Variables
+=====================
+
+The DA850 EVM allows the user to specify the maximum cpu clock allowed by the
+silicon, in Hz, via an environment variable "maxcpuclk".
+
+The maximum clock rate allowed depends on the silicon populated on the EVM.
+Please make sure you understand the restrictions placed on this clock in the
+device specific datasheet before setting up this variable. This information is
+passed to the Linux kernel using the ATAG_REVISION atag.
+
+If "maxcpuclk" is not defined, the configuration CONFIG_DA850_EVM_MAX_CPU_CLK
+is used to obtain this information.
+
 Links
 =====
 
@@ -125,3 +139,12 @@ http://www.spectrumdigital.com/product_info.php?cPath=37&products_id=214
 7) TI DA850 EVM
 http://focus.ti.com/docs/prod/folders/print/omap-l138.html
 http://www.logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit
+
+Davinci special defines
+=======================
+
+CONFIG_SYS_DV_NOR_BOOT_CFG:	AM18xx based boards, booting in NOR Boot mode
+				need a "NOR Boot Configuration Word" stored
+				in the NOR Flash. This define adds this.
+				More Info about this, see:
+				spraba5a.pdf chapter 3.1