[PATCH v4 0/2] reset: canaan: add Kendryte K230 reset support

[Junhui Liu <junhui.liu@pigmoral.tech>]

This patch series add reset controller support for the Canaan Kendryte
K230 SoC.

Tested on CanMV-K230-V1.1 board. Some of the HW_DONE and SW_DONE reset
type was tested by reseting the submodule and checking the reset
register value[1]. The CPU reset type was tested by a temporary rproc
driver[2][3].

link: https://gist.github.com/pigmoral/cc45de673775575750ac7fe49d4456a2 [1]
link: https://github.com/pigmoral/linux/tree/k230/rproc-cpu0 [2]
link: https://github.com/pigmoral/linux/tree/k230/rproc-cpu1 [3]

---
Changes in v4:
- Rebase to v6.16-rc1 and test on CanMV-K230-V1.1 board
- Collect and update tags
- Link to v3: https://lore.kernel.org/r/20250507-k230-reset-v3-0-c85240782ea5@pigmoral.tech

Changes in v3:
- Update copyright/license in driver and bindings headers
- Rename HS/LS to HISYS/LOSYS in DT bindings
- Add reset-timing notes at the top of reset-k230.c
- Replace long udelay(200) to fsleep(200) for HW_DONE paths
- Remove rstc->dev, store device in rstc->rcdev.dev
- Link to v2: https://lore.kernel.org/r/20250420-k230-reset-v2-0-f1b4a016e438@pigmoral.tech

Changes in v2:
- Turn to_k230_rst from macro to inline function
- Use guard to replace spin_lock_irqsave and spin_unlock_irqrestore
- Remove assert and deassert operations for self-clearing reset types,
  only reserve the reset operation
- Add delay to accommodate the reset time
- Remove blank line inside read-modify-write operations
- Remove redundant default case in enum switch
- Update copyright dates and my email address
- Link to v1: https://lore.kernel.org/r/20240924-k230-reset-v1-0-d0cdc11989eb@outlook.com

---
Junhui Liu (2):
      dt-bindings: reset: add support for canaan,k230-rst
      reset: canaan: add reset driver for Kendryte K230

 .../devicetree/bindings/reset/canaan,k230-rst.yaml |  39 +++
 drivers/reset/Kconfig                              |   9 +
 drivers/reset/Makefile                             |   1 +
 drivers/reset/reset-k230.c                         | 371 +++++++++++++++++++++
 include/dt-bindings/reset/canaan,k230-rst.h        |  90 +++++
 5 files changed, 510 insertions(+)
---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20250404-k230-reset-32987c6f0ed5

Best regards,
-- 
Junhui Liu <junhui.liu@pigmoral.tech>