| Summary |
| ======= |
| |
| The source for omap3logic.c encompases the OMAP35 and DM3730 SOM-LV and DM3730 Torpedo platforms, but there are device trees custom taylored to each board. |
| |
| omap3_logic_defconfig = DM37 Torpedo / Torpedo + Wireless |
| omap35_logic_defconfig = OMAP35 Torpedo |
| omap3_logic_somlv_defconfig = DM37 SOM-LV |
| omap35_logic_somlv_defconfig = OMAP35 SOM-LV |
| |
| The device tree included with each of the defconfig files will also direct the board as to which dtb file to load when loading the kernel, so it is not |
| recomended to mix and match the defconfig files. |
| |
| Falcon Mode: FAT SD cards |
| ========================= |
| |
| In this case the additional file is written to the filesystem. In this |
| example we assume that the uImage and device tree to be used are already on |
| the FAT filesystem (only the uImage MUST be for this to function |
| afterwards) along with a Falcon Mode aware MLO and the FAT partition has |
| already been created and marked bootable: |
| |
| U-Boot # mmc rescan |
| # Load kernel and device tree into memory, perform export |
| U-Boot # fatload mmc 0 ${loadaddr} uImage |
| U-Boot # run loadfdt |
| U-Boot # setenv optargs quiet |
| U-Boot # run mmcargs |
| U-Boot # run common_bootargs |
| U-Boot # spl export fdt ${loadaddr} - ${fdtaddr} |
| |
| This will print a number of lines and then end with something like: |
| Loading Device Tree to 8dec9000, end 8dee0295 ... OK |
| |
| So then note the starting address and write the args to mmc/sd: |
| |
| U-Boot # fatwrite mmc 0:1 0x8dec9000 args 0x20000 |
| |
| The size of 0x20000 matches the CMD_SPL_WRITE_SIZE. |
| |
| Falcon Mode: NAND |
| ================= |
| |
| In this case the additional data is written to another partition of the |
| NAND. In this example we assume that the uImage and device tree to be are |
| already located on the NAND somewhere (such as filesystem or mtd partition) |
| along with a Falcon Mode aware MLO written to the correct locations for |
| booting and mtdparts have been configured correctly for the board: |
| |
| U-Boot # nand read ${loadaddr} kernel |
| U-Boot # load nand rootfs ${fdtaddr} /boot/am335x-evm.dtb |
| U-Boot # run nandargs |
| U-Boot # run common_bootargs |
| U-Boot # spl export fdt ${loadaddr} - ${fdtaddr} |
| U-Boot # nand erase.part u-boot-spl-os |
| U-Boot # nand write ${fdtaddr} u-boot-spl-os |
