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* [PATCH 0/2] riscv: dts: spacemit: mark K1 boot nodes bootph-pre-ram
@ 2026-10-12 23:56 Hung-Chun Tseng
  2026-10-12 23:56 ` [PATCH 1/2] riscv: dts: spacemit: k1: mark boot-critical SoC " Hung-Chun Tseng
  2026-10-12 23:56 ` [PATCH 2/2] riscv: dts: spacemit: mark K1 board boot devices bootph-pre-ram Hung-Chun Tseng
  0 siblings, 2 replies; 5+ messages in thread
From: Hung-Chun Tseng @ 2026-10-12 23:56 UTC (permalink / raw)
  To: Yixun Lan, Rob Herring, Krzysztof Kozlowski, Conor Dooley
  Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
	E Shattow, devicetree, linux-riscv, spacemit, linux-kernel

A bootloader SPL on the SpacemiT K1 runs from SRAM and needs a handful
of nodes before DRAM is up: the root clocks and clock controllers, the
console UART, the boot media (SD, eMMC, QSPI NOR), the board EEPROM
used to identify the board, and the PMIC rails it programs before DRAM
training. Today mainline U-Boot carries the bootph-pre-ram tags for
these in per-board -u-boot.dtsi files.

When I sent a U-Boot patch adding another such file for the Milk-V
Jupiter, E Shattow asked for the tags to go upstream first, so every
K1 board gets them and the U-Boot overlays can shrink [1]. Earlier
there was no working mainline SPL for K1 to justify them; there is now.

Patch 1 tags the SoC nodes in k1.dtsi. Patch 2 tags the board-specific
EEPROM, PMIC rails and SPI NOR on the boards that have them. The set of
nodes matches what the mainline U-Boot SPL tags for the BPI-F3 and
MusePi Pro.

Testing: all K1 DTBs build, and dtbs_check is clean for them with and
without this series. I have not run an SPL built from these trees on
hardware. On a Milk-V Jupiter running Linux I checked that the EEPROM,
PMIC and SPI NOR answer at the addresses described.

[1] https://lore.kernel.org/u-boot/5d323a11-da4e-4071-bdeb-ab5c03e8f85e@freeshell.de/

Hung-Chun Tseng (2):
  riscv: dts: spacemit: k1: mark boot-critical SoC nodes bootph-pre-ram
  riscv: dts: spacemit: mark K1 board boot devices bootph-pre-ram

 arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi |  7 +++++++
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts   |  7 +++++++
 arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts |  8 ++++++++
 arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts    |  8 ++++++++
 arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts  |  5 +++++
 arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts  |  6 ++++++
 arch/riscv/boot/dts/spacemit/k1.dtsi              | 12 ++++++++++++
 7 files changed, 53 insertions(+)

-- 
2.43.0


^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2026-10-13  0:08 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2026-10-12 23:56 [PATCH 0/2] riscv: dts: spacemit: mark K1 boot nodes bootph-pre-ram Hung-Chun Tseng
2026-10-12 23:56 ` [PATCH 1/2] riscv: dts: spacemit: k1: mark boot-critical SoC " Hung-Chun Tseng
2026-10-13  0:04   ` sashiko-bot
2026-10-12 23:56 ` [PATCH 2/2] riscv: dts: spacemit: mark K1 board boot devices bootph-pre-ram Hung-Chun Tseng
2026-10-13  0:08   ` sashiko-bot

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