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board: sophgo: add support for Milk-V Duo 256M

2026-08-05T18:13:19Z

Add U-Boot support for Milk-V Duo 256M. This board has a different SoC compared to the Milk-V Duo 64M, it uses the Sophgo SG2002 instead of the Sophgo CV1800B. Both SoCs share many common IP blocks, so this board reuses the existing cv1800b CPU support. The board shares the same 'board.c' with Milk-V Duo 64MB (CV1800B), so use the same file for now. Link: https://milkv.io/docs/duo/getting-started/duo256m Signed-off-by: Hiago De Franco Acked-by: Leo Yu-Chi Liang

riscv: remove log_debug() in enable_caches()

2026-07-27T02:39:22Z

log_debug() cannot be used before log_init() has been called. Remove the log_debug() statement in enable_caches() since it is called before log_init() in initcall_run_r(). This fixes a bug where a RISC-V system which does not have the "zicbom" extension (such as PIC64-HPSC/HX) would get lost in an infinite loop in log_dispatch(). Fixes: 9e859849e2ca ("riscv: cache: Add CBO instructions") Signed-off-by: Charles Perry Reviewed-by: Leo Yu-Chi Liang

riscv: Make RISCV_ACLINT visible

2026-07-27T02:39:22Z

A platform (like Xilinx Microblaze V) does not have an ACLINT (Advanced Core Local Interruptor) hardware block. Make RISCV_ACLINT and SPL_RISCV_ACLINT Kconfig symbols visible with prompts. Signed-off-by: Michal Simek Reviewed-by: Yao Zi

riscv: Skip riscv_cpu_setup() when CPU driver is disabled

2026-07-27T02:39:21Z

Building on commit c64fc632a86a ("riscv: cpu: Use CONFIG_IS_ENABLED(CPU) instead of plain ifdef"), add an early return in riscv_cpu_setup() when CONFIG_CPU is not enabled. This allows platforms to save code space in SPL by disabling CONFIG_SPL_CPU. Without this patch, building U-Boot with CONFIG_CPU=n and CONFIG_EVENT=y is broken: riscv_cpu_setup() is registered as an EVT_DM_POST_INIT_F event spy, and when the CPU uclass is unavailable uclass_find_first_device() returns no device, so the function returns -ENODEV. That in turn makes event_notify_null() in dm_init_and_scan() fail and triggers a boot hang ("initcall initf_dm() failed"). Returning 0 early avoids that failure. The compiler's dead-code elimination combined with --gc-sections removes the unreachable code and all associated static data, achieving significant size reduction without preprocessor guards: spl/u-boot-spl:all -4332 spl/u-boot-spl:rodata -2872 spl/u-boot-spl:text -1460 Signed-off-by: Michal Simek Reviewed-by: Yao Zi

riscv: dts: cv18xx: fix spi node name

2026-07-27T02:39:21Z

Fix warning: arch/riscv/dts/cv18xx.dtsi:208.26-216.5: Warning (spi_bus_bridge): /soc/spi-nor@10000000: node name for SPI buses should be 'spi' Signed-off-by: Hiago De Franco

riscv: binman: Always set default configuration in FIT image

2026-07-21T09:16:02Z

When CONFIG_MULTI_DTB_FIT is enabled, the FIT image contains multiple device tree configurations for different boards. The default configuration must be explicitly set to ensure the FIT framework traverses all available configurations instead of falling back to CONFIG_DEFAULT_DEVICE_TREE. Without this default property, fit_find_config_node() will use CONFIG_DEFAULT_DEVICE_TREE as the configuration name to match. This prevents the SPL from correctly selecting the appropriate DTB based on runtime board detection (e.g., from EEPROM). Remove the conditional guard so that "default = conf-1" is always present in the FIT image, regardless of CONFIG_MULTI_DTB_FIT. Signed-off-by: Raymond Mao Signed-off-by: Guodong Xu

spl: k1: enable SPI NOR flash detection and boot

2026-07-21T09:16:01Z

Add nor_early_init() to probe the QSPI controller and SPI NOR flash in SPL. Switch spl_boot_device() to BOOT_DEVICE_SPI so the board boots from SPI flash. Change the default device tree to k1-musepi-pro, whose u-boot overlay already defines the QSPI controller and flash node with bootph-pre-ram markers. Enable the required SPI driver model and flash config options. Signed-off-by: Guodong Xu

board: k1: enable pmic in spl

2026-07-21T09:12:53Z

Add Spacemit P1 SoC support in SPL. And set the default voltage for BUCKs and LDOs. Also update MAINTAINERS: add Guodong Xu as co-maintainer, list the u-boot-spacemit mailing list, register the new K1 driver files (i2c, PMIC, regulator), and fix a pre-existing '@@' typo in Huan Zhou's email. Fixes: 1cd239f44438 ("riscv: spacemit: bananapi_f3: initial support added") Signed-off-by: Raymond Mao Signed-off-by: Guodong Xu Tested-by: Songsong Zhang

spacemit: k1: Add DDR firmware support to SPL

2026-07-21T08:57:14Z

Include DDR initialization firmware in the SPL image. The firmware path can be specified via the DDR_FW_FILE environment variable. If the firmware is not found, an empty placeholder file is created to allow the build to proceed without DDR initialization support. Signed-off-by: Raymond Mao Signed-off-by: Guodong Xu Tested-by: Songsong Zhang

spacemit: k1: add TLV EEPROM support in SPL

2026-07-21T08:57:13Z

And support for required components including clock, I2C controller, and I2C EEPROM. Signed-off-by: Raymond Mao Signed-off-by: Guodong Xu Tested-by: Songsong Zhang