Re: [PATCH 02/10] dt-bindings: gpio: pca95xx: Document Kinetic KTS1622

[Bartosz Golaszewski <brgl@kernel.org>]

On Sat, 11 Jul 2026 22:59:31 +0200, Marek Vasut <marex@nabladev.com> said:
> The Kinetic Technologies KTS1622 is a 16-bit general-purpose I/O
> expander via the I2C bus for microcontrollers when additional I/Os
> are needed while keeping interconnections to the minimum. Datasheet
> comparison suggests that it is compatible with TCAL6416, add the
> compatible string and TCAL6416 as a fallback compatible.
>
> Signed-off-by: Marek Vasut <marex@nabladev.com>
> ---
> Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
> Cc: Bartosz Golaszewski <brgl@kernel.org>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Linus Walleij <linusw@kernel.org>
> Cc: Rob Herring <robh@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: kernel@dh-electronics.com
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-gpio@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-stm32@st-md-mailman.stormreply.com
> ---
>  Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
> index 4f955f855e1ab..4631388a7d914 100644
> --- a/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
> +++ b/Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml
> @@ -22,6 +22,9 @@ properties:
>        - items:
>            - const: diodes,pi4ioe5v6534q
>            - const: nxp,pcal6534
> +      - items:
> +          - const: kinetic,kts1622
> +          - const: ti,tcal6416
>        - items:
>            - enum:
>                - exar,xra1202
> --
> 2.53.0
>
>

Hi Konstantin!

I applied this patch with b4 and tried to generate the .thanks email. It failed
like so:

$ b4 ty -all
Auto-thankanating commits in gpio/for-next
Found 9 of your commits since 1.week
Calculating patch hashes, may take a moment...
  Located: [PATCH 00/10] arm64: dts: st: Add support for DH
electronics STM32MP23xx/STM32MP25xx DHCOS SoM and Breakout Board and
DHSBC
---
Generating 1 thank-you letters
  Writing: ./marex_nabladev_com_patch_00_10_arm64_dts_st_add_support_for_dh_electronics_stm32mp23xx_stm32mp25xx_dhcos_som_and_breakout_board_and_dhsbc.thanks
Traceback (most recent call last):
  File "/usr/bin/b4", line 8, in <module>
    sys.exit(cmd())
             ~~~^^
  File "/usr/lib/python3/dist-packages/b4/command.py", line 417, in cmd
    cmdargs.func(cmdargs)
    ~~~~~~~~~~~~^^^^^^^^^
  File "/usr/lib/python3/dist-packages/b4/command.py", line 113, in cmd_ty
    b4.ty.main(cmdargs)
    ~~~~~~~~~~^^^^^^^^^
  File "/usr/lib/python3/dist-packages/b4/ty.py", line 681, in main
    auto_thankanator(cmdargs)
    ~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/usr/lib/python3/dist-packages/b4/ty.py", line 386, in auto_thankanator
    send_messages(applied, wantbranch, cmdargs)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/b4/ty.py", line 452, in send_messages
    with open(outfile, 'wb') as fh:
         ~~~~^^^^^^^^^^^^^^^
OSError: [Errno 36] File name too long:
'./marex_nabladev_com_patch_00_10_arm64_dts_st_add_support_for_dh_electronics_stm32mp23xx_stm32mp25xx_dhcos_som_and_breakout_board_and_dhsbc.thanks'

The name is under the 255 byte limit, is this a b4 bug/limitation?

Thanks,
Bart