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.
Heinrich Schuchardt (4): board: starfive: function to read eMMC size board: add support for MARS CM SD 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 | 27 +++- .../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 | 125 ++++++++++++++++++ 8 files changed, 197 insertions(+), 2 deletions(-) create mode 100644 doc/board/starfive/milk-v_mars_cm.rst