[PATCH v2 0/3] i2c: ma35d1: Add support for MA35D1 I2C controller

[zychen]

Hi Andi and Krzysztof,

I'm following up on this series. As detailed in the change log, v2 addresses the feedback from v1 regarding the modernization of legacy code.

I am preparing v3 to address minor formatting issues in Patch 3 (DTS). Before sending it out, I would highly appreciate any technical feedback on the driver logic in Patch 2 to ensure it aligns with your expectations.

Best regards,
Zi-Yu

Zi-Yu Chen 於 2026/3/16 下午 02:37 寫道:
> This series adds support for the I2C controller found in the Nuvoton
> MA35D1 SoC. The driver supports controller and optional target mode
> and runtime power management.
> 
> The implementation has been tested on the Nuvoton MA35D1 SOM board.
> 
> Changes in v2:
>   - Overall:
>     - Rebase on linux-i2c/i2c-next
>     - Switched terminology from "master/slave" to "controller/target".
>       
>   - Patch 1 (dt-bindings):
>     - Simplified description and fixed 'reg' size in example.
> 
>   - Patch 2 (driver):
>     - Modernized using devm_*, generic device properties, and FIELD_PREP/GENMASK.
>     - Optimized power management by moving clock control to runtime PM.
>     - Simplified code by removing redundant .remove(), .owner, and inlines.
>     - Added dev_err_probe() and default bus frequency handling.
>     
>   - Patch 3 (dts):
>     - Moved i2c aliases to board dts and reordered nodes alphabetically.
> 
>   -Link to v1: https://lore.kernel.org/r/20260302020822.13936-1-zychennvt@gmail.com
> 
> Zi-Yu Chen (3):
>   dt-bindings: i2c: nuvoton,ma35d1-i2c: Add MA35D1 I2C controller
>   i2c: ma35d1: Add Nuvoton MA35D1 I2C driver support
>   arm64: dts: nuvoton: Add I2C nodes for MA35D1 SoC
> 
>  .../bindings/i2c/nuvoton,ma35d1-i2c.yaml      |  63 ++
>  .../boot/dts/nuvoton/ma35d1-som-256m.dts      |  18 +-
>  arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       |  60 ++
>  drivers/i2c/busses/Kconfig                    |  13 +
>  drivers/i2c/busses/Makefile                   |   1 +
>  drivers/i2c/busses/i2c-ma35d1.c               | 792 ++++++++++++++++++
>  6 files changed, 946 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/devicetree/bindings/i2c/nuvoton,ma35d1-i2c.yaml
>  create mode 100644 drivers/i2c/busses/i2c-ma35d1.c
>