[DNM v1 0/7] Guide to build reduced SpacemiT K3 vendor BSP

[E Shattow <e@freeshell.de>]

Do Not Merge

Informational purpose only, to aid mainline development of SpacemiT K3
support.

As of 2026 October there is initial SpacemiT K3 mainline U-Boot
support merged for U-Boot main app in the v2027.01 development cycle;
the vendor Board Support Package is used as an SPL to read DDR model
from EEPROM and then configure DDR before loading U-Boot main app.

Patches in reply to this cover letter are in support of the vendored
fork of U-Boot 2022.10 that we currently rely on for building the SPL.

Guidance how to build this to be continued in reply to this message...

E Shattow (7):
  reduced SpacemiT K3 vendor BSP: use MKIMAGE build env
  reduced SpacemiT K3 vendor BSP: add guards around config optioned k3.c
    code
  reduced SpacemiT K3 vendor BSP: add fallback fastboot buf addr and
    size def
  reduced SpacemiT K3 vendor BSP: force UART boot when YMODEM_SUPPORT
    enabled
  reduced SpacemiT K3 vendor BSP: add UART SPI defconfig
  reduced SpacemiT K3 vendor BSP: add UART (no SPI) defconfig
  reduced SpacemiT K3 vendor BSP: set uart compatible for mainline
    OpenSBI

 arch/riscv/dts/k3.dtsi                   |  2 +-
 board/spacemit/k3/config.mk              | 12 ++---
 board/spacemit/k3/k3.c                   | 28 +++++++++++
 board/spacemit/k3/spl.c                  |  8 ++++
 configs/spacemit_k3_uart_nospi_defconfig | 44 +++++++++++++++++
 configs/spacemit_k3_uart_spi_defconfig   | 61 ++++++++++++++++++++++++
 include/configs/k3.h                     |  8 ++++
 7 files changed, 153 insertions(+), 10 deletions(-)
 create mode 100644 configs/spacemit_k3_uart_nospi_defconfig
 create mode 100644 configs/spacemit_k3_uart_spi_defconfig


base-commit: 289dc2b7bd25bf9d88ce9e7e263e95234868ca14
-- 
2.53.0