Milk-V Duo 256M is a small development board based on the Sophgo SG2002 SoC.
U-Boot runs as the S-mode payload on top of the vendor FSBL and OpenSBI, packaged together into a FIP image on the SD card. The vendor FIP tool prepends a 32-byte loader header to u-boot.bin and loads the result at 0x80200000, so TEXT_BASE is set to 0x80200020 to match the address the U-Boot code actually runs. The following peripherals are supported: - ns16550 serial console (UART0) - SD/MMC - Ethernet with the SoC internal PHY This patch was tested on Milk-V Duo 256MB using an SD card and the Duo USB & Ethernet IOB (base board) [0]. This series uses the CV1800B SYS_CPU target since SG2002 shares common IPs with CV1800B. Other SG2002 as LicheeRV Nano does the same. Note: Linux device tree is not yet merged [1], therefore I am adding a device tree here and it can be later changed to use the kernel upstream one. [0] https://milkv.io/docs/duo/io-board/usb-ethernet-iob [1] https://lore.kernel.org/lkml/[email protected]/ Link: https://milkv.io/docs/duo/getting-started/duo256m Signed-off-by: Hiago De Franco <[email protected]> --- Hiago De Franco (2): board: sophgo: move ethernet driver to common directory board: sophgo: add support for Milk-V Duo 256M arch/riscv/Kconfig | 4 ++ arch/riscv/dts/Makefile | 1 + arch/riscv/dts/sg2002-milkv-duo256m.dts | 46 +++++++++++++++ board/sophgo/{milkv_duo => common}/ethernet.c | 0 board/sophgo/{milkv_duo => common}/ethernet.h | 0 board/sophgo/milkv_duo/MAINTAINERS | 1 + board/sophgo/milkv_duo/Makefile | 2 +- board/sophgo/milkv_duo/board.c | 2 +- board/sophgo/milkv_duo_256m/Kconfig | 30 ++++++++++ board/sophgo/milkv_duo_256m/MAINTAINERS | 5 ++ board/sophgo/milkv_duo_256m/Makefile | 6 ++ board/sophgo/milkv_duo_256m/board.c | 19 ++++++ board/sophgo/milkv_duo_256m/milkv_duo_256m.env | 8 +++ configs/milkv_duo_256m_defconfig | 42 +++++++++++++ doc/board/sophgo/index.rst | 1 + doc/board/sophgo/milkv_duo_256m.rst | 82 ++++++++++++++++++++++++++ include/configs/milkv_duo_256m.h | 12 ++++ 17 files changed, 259 insertions(+), 2 deletions(-) --- base-commit: ece349ade2973e220f524ce59e59711cc919263f change-id: 20260710-add-milkv-duo256m-1662c5cafb35 Best regards, -- Hiago De Franco <[email protected]>
