linux-kernel - [PATCH v2 0/2] reset: canaan: add Kendryte K230 reset support

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Message-Id: <20250420-k230-reset-v2-0-f1b4a016e438@pigmoral.tech>
Date: Sun, 20 Apr 2025 01:09:43 +0800
From: Junhui Liu <junhui.liu@...moral.tech>
To: Philipp Zabel <p.zabel@...gutronix.de>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Junhui Liu <junhui.liu@...moral.tech>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, Conor Dooley <conor.dooley@...rochip.com>
Subject: [PATCH v2 0/2] reset: canaan: add Kendryte K230 reset support

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 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                         | 355 +++++++++++++++++++++
 include/dt-bindings/reset/canaan,k230-rst.h        |  90 ++++++
 5 files changed, 494 insertions(+)
---
base-commit: 8560697b23dc2f405cb463af2b17256a9888129d
change-id: 20250404-k230-reset-32987c6f0ed5

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