projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 6406d6da SP |
1 | Summary |
| 2 | ======= | |
| 3 | ||
| 655d216a BG |
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. | |
| 6406d6da | 6 | |
| 655d216a BG |
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. | |
| 6406d6da | 9 | |
| 655d216a | 10 | Currently the following boards are supported: |
| 6406d6da | 11 | |
| 718f7464 SN |
12 | * TI DA850 EVM |
| 13 | ||
| 655d216a | 14 | * TI OMAP-L138 LCDK |
| 6406d6da | 15 | |
| 655d216a | 16 | * Lego EV3 |
| 6406d6da SP |
17 | |
| 18 | Build | |
| 19 | ===== | |
| 20 | ||
| 718f7464 SN |
21 | * TI DA850 EVM: |
| 22 | ||
| 23 | make da850evm_config | |
| 24 | make | |
| 25 | ||
| 655d216a | 26 | * TI OMAP-L138 LCDK |
| 6406d6da | 27 | |
| 655d216a | 28 | make omapl138_lcdk_defconfig |
| 6406d6da SP |
29 | make |
| 30 | ||
| 655d216a | 31 | * Lego EV3 |
| 6406d6da | 32 | |
| 655d216a | 33 | make legoev3_defconfig |
| 6406d6da SP |
34 | make |
| 35 | ||
| 36 | Bootloaders | |
| 37 | =============== | |
| 38 | ||
| 655d216a BG |
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 | |
| 41 | initialization. | |
| 42 | ||
| 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. | |
| 3d2c8e6c | 45 | |
| 4f6fc15b SN |
46 | Environment Variables |
| 47 | ===================== | |
| 48 | ||
| 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". | |
| 51 | ||
| 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. | |
| 56 | ||
| 57 | If "maxcpuclk" is not defined, the configuration CONFIG_DA850_EVM_MAX_CPU_CLK | |
| 58 | is used to obtain this information. | |
| 59 | ||
| 6406d6da SP |
60 | Links |
| 61 | ===== | |
| 62 | ||
| 655d216a | 63 | 1) TI DA850 EVM |
| 718f7464 SN |
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 | |
| 337c4333 | 66 | |
| 655d216a BG |
67 | 2) TI OMAP-L138 LCDK |
| 68 | http://focus.ti.com/docs/prod/folders/print/omap-l138.html | |
| 69 | http://www.ti.com/tool/TMDXLCDK138 | |
| 70 | ||
| 337c4333 HS |
71 | Davinci special defines |
| 72 | ======================= | |
| 73 | ||
| 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 |