powerpc: T4160: Remove macro CONFIG_PPC_T4160

[oweals/u-boot.git] / doc / README.davinci

diff --git a/doc/README.davinci b/doc/README.davinci
index a2e96a5a21e795830ad89f77c88b44f67bfea558..aa7c85011a377fe1e71690561d6ea28f88988a36 100644 (file)
--- a/doc/README.davinci
+++ b/doc/README.davinci
@@ -95,6 +95,29 @@ into the RAM.
 The programmers and UBL are always released as part of any standard TI
 software release associated with an SOC.
 
 The programmers and UBL are always released as part of any standard TI
 software release associated with an SOC.
 

+Alternative boot method (DA850 EVM only):
+For the DA850 EVM an SPL (secondary program loader, see doc/README.SPL)
+is provided to load U-Boot directly from SPI flash. In this case, the
+SPL does the low level initialization that is otherwise done by the SPL.
+To build U-Boot with this SPL, do
+make da850evm_config
+make u-boot.ais
+and program the resulting u-boot.ais file to the SPI flash of the DA850 EVM.
+
+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
 =====
 
 Links
 =====
 


@@ -125,3 +148,12 @@ 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
 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