Re: [PATCH v4 3/4] dt-bindings: gpio: describe Waveshare GPIO controller

Dmitry Baryshkov
2026-04-19T00:31:45Z

On Fri, Apr 17, 2026 at 07:39:27PM -0500, Rob Herring (Arm) wrote:
>
> On Sat, 18 Apr 2026 02:16:22 +0300, Dmitry Baryshkov wrote:
> > The Waveshare DSI TOUCH family of panels has separate on-board GPIO
> > controller, which controls power supplies to the panel and the touch
> > screen and provides reset pins for both the panel and the touchscreen.
> > Also it provides a simple PWM controller for panel backlight.
> >
> > Add bindings for these GPIO controllers. As overall integration might be
> > not very obvious (and it differs significantly from the bindings used by
> > the original drivers), provide complete example with the on-board
> > regulators and the DSI panel.
> >
> > Acked-by: Conor Dooley <conor.dooley@microchip.com>
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> > ---
> > .../bindings/gpio/waveshare,dsi-touch-gpio.yaml | 100 +++++++++++++++++++++
> > 1 file changed, 100 insertions(+)
> >
>
> My bot found errors running 'make dt_binding_check' on your patch:
>
> yamllint warnings/errors:
>
> dtschema/dtc warnings/errors:
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/gpio/waveshare,dsi-touch-gpio.example.dtb: panel@0 (waveshare,8.0-dsi-touch-a): compatible:0: 'waveshare,8.0-dsi-touch-a' is not one of ['anbernic,rg-ds-display-bottom', 'anbernic,rg-ds-display-top', 'chongzhou,cz101b4001', 'kingdisplay,kd101ne3-40ti', 'melfas,lmfbx101117480', 'radxa,display-10hd-ad001', 'radxa,display-8hd-ad002', 'taiguanck,xti05101-01a']
> from schema $id: http://devicetree.org/schemas/display/panel/jadard,jd9365da-h3.yaml
> Documentation/devicetree/bindings/gpio/waveshare,dsi-touch-gpio.example.dtb: /example-0/dsi/panel@0: failed to match any schema with compatible: ['waveshare,8.0-dsi-touch-a', 'jadard,jd9365da-h3']
>

Sorry, yes. This patch is now a part of drm-misc-next, but is not in
-next, until 7.1-rc1.

> doc reference errors (make refcheckdocs):
>
> See https://patchwork.kernel.org/project/devicetree/patch/20260418-waveshare-dsi-touch-v4-3-b249f3e702bd@oss.qualcomm.com
>
> The base for the series is generally the latest rc1. A different dependency
> should be noted in *this* patch.
>
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:
>
> pip3 install dtschema --upgrade
>
> Please check and re-submit after running the above command yourself. Note
> that DT_SCHEMA_FILES can be set to your schema file to speed up checking
> your schema. However, it must be unset to test all examples with your schema.
>

--
With best wishes
Dmitry