reset: spacemit: k1: introduce syscon-bound reset driver

2026-07-21T08:31:10Z

The existing K1 reset driver (drivers/reset/reset-spacemit-k1.c) binds via DT of_match against a top-level reset-controller node, but kernel mainline DT for K1 has no such node: the mpmu, apbc, apmu and apbc2 syscons each spawn their own reset device as an auxiliary of the clock controller. The legacy driver therefore cannot consume it. Add a new reset driver at drivers/reset/spacemit/reset-spacemit-k1.c bound by name from each per-syscon clock driver via device_bind_driver_to_node(), without DT of_match, mirroring the kernel's auxiliary-device pattern. To keep the series bisectable, this driver coexists link-cleanly with the legacy spacemit,k1-reset driver during the transition. A follow-up patch that switches the K1 build to dts/upstream/src/riscv/spacemit/ will drop the legacy driver. Signed-off-by: Guodong Xu

clk: spacemit: Add support for K1 SoC

2026-07-21T08:31:10Z

The K1 SoC exposes four clock providers in the kernel mainline DT: one PLL controller ("spacemit,k1-pll") and three syscon clock nodes ("spacemit,k1-syscon-{mpmu,apbc,apmu}"). Register a separate U_BOOT_DRIVER for each. The controllers register clocks into a single CCF namespace, and a clock in one controller may parent off a clock owned by another, so a controller must register only after the controllers that own its parents have probed. Each probe forces its parent controllers up by driver: MPMU <- PLL APMU <- PLL, MPMU APBC <- PLL, MPMU, APMU Signed-off-by: Junhui Liu Signed-off-by: Raymond Mao Signed-off-by: Guodong Xu

u-boot.git/include/soc/spacemit, branch main

reset: spacemit: k1: introduce syscon-bound reset driver

clk: spacemit: Add support for K1 SoC