4 Note: this document used to be about the entire family of DaVinci SOCs but the
5 support for the DM* family and DA830 has since been dropped.
7 This README is about U-Boot support for TI's DA850 SoC. This SOC has an OMAP
8 part number but is very similar to the DaVinci series.
10 Currently the following boards are supported:
28 make omapl138_lcdk_defconfig
33 make legoev3_defconfig
39 For DA850 an SPL (secondary program loader, see doc/README.SPL) is provided
40 to load U-Boot directly from SPI flash. The SPL takes care of the low level
43 The SPL is built as u-boot.ais for all DA850 defconfigs. The resulting
44 image file can be programmed to the SPI flash of the DA850 EVM/LCDK.
49 The DA850 EVM allows the user to specify the maximum cpu clock allowed by the
50 silicon, in Hz, via an environment variable "maxcpuclk".
52 The maximum clock rate allowed depends on the silicon populated on the EVM.
53 Please make sure you understand the restrictions placed on this clock in the
54 device specific datasheet before setting up this variable. This information is
55 passed to the Linux kernel using the ATAG_REVISION atag.
57 If "maxcpuclk" is not defined, the configuration CONFIG_DA850_EVM_MAX_CPU_CLK
58 is used to obtain this information.
64 http://focus.ti.com/docs/prod/folders/print/omap-l138.html
65 http://www.logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit
68 http://focus.ti.com/docs/prod/folders/print/omap-l138.html
69 http://www.ti.com/tool/TMDXLCDK138
71 Davinci special defines
72 =======================
74 CONFIG_SYS_DV_NOR_BOOT_CFG: AM18xx based boards, booting in NOR Boot mode
75 need a "NOR Boot Configuration Word" stored
76 in the NOR Flash. This define adds this.
77 More Info about this, see:
78 spraba5a.pdf chapter 3.1