With this series the Milk-V Mars CM board can be booted.
NVMe, SD-card, Ethernet, UART are working but not USB.
The first series Milk-V Mars CM Lite board (the version without eMMC) uses incorrect series numbers indicating eMMC presence. For these CONFIG_STARFIVE_NO_EMMC=y must be set to indicate that eMMC is not present.
Thanks to E. Shattow for all the helpful discussions. He figured out what needed to be patched in the device-tree.
v2: fix typos in get_mmc_size_from_eeprom() description rename spl_fdt_fixup_marc() to spl_fdt_fixup_mars_cm() rename device-trees for Mars CM and Mars CM Lite change model and compatible properties refer to tio as tool for booting via UART describe how to update serial number
Heinrich Schuchardt (4): board: starfive: function to read eMMC size board: add support for Milk-V Mars CM doc: Milk-V Mars CM and Milk-V Mars CM Lite configs: visionfive2: enable SPL_YMODEM_SUPPORT
arch/riscv/include/asm/arch-jh7110/eeprom.h | 7 + board/starfive/visionfive2/Kconfig | 9 + board/starfive/visionfive2/spl.c | 28 ++- .../visionfive2/starfive_visionfive2.c | 11 +- .../visionfive2/visionfive2-i2c-eeprom.c | 18 ++ configs/starfive_visionfive2_defconfig | 1 + doc/board/starfive/index.rst | 1 + doc/board/starfive/milk-v_mars_cm.rst | 183 ++++++++++++++++++ 8 files changed, 256 insertions(+), 2 deletions(-) create mode 100644 doc/board/starfive/milk-v_mars_cm.rst