On Sat, Feb 16, 2019 at 3:08 PM Derald D. Woods <[email protected]> wrote: > > On Sat, Feb 16, 2019 at 03:49:01PM -0500, Tom Rini wrote: > > On Sat, Feb 16, 2019 at 01:31:24PM -0600, Adam Ford wrote: > > > > > With the generic omap3-u-boot.dtsi file available, this patch > > > increased the memory of the various incarnations of the omap3_logic > > > board, and points their respective u-boot.dtsi files to the newly > > > created generic one, and removes the PLATDATA from the board file. > > > > > > These are all done at once because the're all utilizing the same > > > omap3logic.c board file. > > > > > > Signed-off-by: Adam Ford <[email protected]> > > > > Ah-haha! Thank you! I also needed to delete the platform data and then > > beagleboard is also booting. > > > > Can we get a quick summary of the conversion steps? My omap3-evm did not > get a serial console when applying patch[1] and using example > modifications from patch[2].
Patch 1 tells the system what nodes to generate in SPL. Without the extra entries, the SPL device tree is blank. Once the individual board file included the generic omap3-u-boot.dtsi file, I was able to verify the device tree was bring the correct SPL required nodes with: dtc -I dtb -O dts spl/u-boot-spl.dtb It's at this stage, were you might have to add 'u-boot,dm-spl;' to the nodes you need. Once I verified the nodes were made, I needed to increase the memory allocation to handle reading the device tree, make sure a few additional flags were set: These two reduce the code, but I am not 100% certain they were needed. These were done at the recommendation of Tom Rini. +# CONFIG_SPL_USE_ARCH_MEMCPY is not set +# CONFIG_SPL_USE_ARCH_MEMSET is not set Increase available memory CONFIG_SYS_MALLOC_F_LEN=0x4000 Give BSS some room to breath: CONFIG_SPL_SEPARATE_BSS=y Specify the FDT: CONFIG_DEFAULT_FDT_FILE="logicpd-torpedo-35xx-devkit.dtb" Enable the Device Tree support in SPL: CONFIG_SPL_OF_CONTROL=y (make sure SPL_OF_PLATDATA is NOT set or it won't boot) These effectively give SPL the same DT support as what's in the main U-Boot: CONFIG_SPL_DM_SEQ_ALIAS=y CONFIG_SPL_OF_TRANSLATE=y For the omap3_logic boards, they have a config option to relocate SPL_TEXT_BASE to earlier SRAM which gives us a bit more available space in SPL. I don't know if these are set for your boards or not. #undef CONFIG_SPL_TEXT_BASE #define CONFIG_SPL_TEXT_BASE 0x40200000 You'll also want to make sure the DM is enabled in SPL. I was able to verify an OMAP3530 and DM3730 both booted and I tested both Logic PD Torpedo and SOM-LV boards, but I am having issues getting the AM3517_evm to build with the same configuration. I am not sure what's wrong with the AM3517, but any attempts to enable DM in SPL fail on AM3517 even without SPL_OF_CONTROL. adam > > Derald > _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
