On Tue, Feb 14, 2023 at 4:03 PM Jonas Karlman <jo...@kwiboo.se> wrote: > > Rockchip SoCs typically use U-Boot TPL to initialize DRAM, then jumps > back to BootRom to load next stage, U-Boot SPL, into DRAM. BootRom then > jumps to U-Boot SPL to continue the normal boot flow. > > However, there is no support to initialize DRAM on RK35xx SoCs using > U-Boot TPL and instead an external TPL binary must be used to generate a > bootable u-boot-rockchip.bin image. > > Add CONFIG_ROCKCHIP_EXTERNAL_TPL to indicate that an external TPL should > be used. Build U-Boot with ROCKCHIP_TPL=/path/to/ddr.bin to generate a > bootable u-boot-rockchip.bin image for RK3568.
Please add documentation in doc/board/rockchip/rockchip.rst and take an example of a real DDR bin from rkbin. Jagan.
