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 from SPI flash, MMC or NAND. The SPL takes care of the low level
43 The SPL is built as u-boot.ais for all DA850 defconfigs except those booting
44 from NOR flash. The resulting image file can be programmed to the SPI flash
45 of the DA850 EVM/LCDK.
47 Devices that support booting from NOR utilize execute in place (XIP) and do
48 not require SPL to perform low level initialization.
53 The DA850 EVM allows the user to specify the maximum cpu clock allowed by the
54 silicon, in Hz, via an environment variable "maxcpuclk".
56 The maximum clock rate allowed depends on the silicon populated on the EVM.
57 Please make sure you understand the restrictions placed on this clock in the
58 device specific datasheet before setting up this variable. This information is
59 passed to the Linux kernel using the ATAG_REVISION atag.
61 If "maxcpuclk" is not defined, the configuration CONFIG_DA850_EVM_MAX_CPU_CLK
62 is used to obtain this information.
68 http://focus.ti.com/docs/prod/folders/print/omap-l138.html
69 http://www.logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit
72 http://focus.ti.com/docs/prod/folders/print/omap-l138.html
73 http://www.ti.com/tool/TMDXLCDK138
75 Davinci special defines
76 =======================
78 CONFIG_SYS_DV_NOR_BOOT_CFG: AM18xx based boards, booting in NOR Boot mode
79 need a "NOR Boot Configuration Word" stored
80 in the NOR Flash. This define adds this.
81 More Info about this, see:
82 spraba5a.pdf chapter 3.1