Re: [PATCH] TinyDRM display driver for Philips PCD8544 display controller

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On Tue, 18 Jul 2023 11:07:27 +0300, Viktar Simanenka wrote:
> Support for common monochrome LCD displays based on PCD8544 (such as Nokia 5110/3310 LCD) SPI controlled displays.
> 
> Signed-off-by: Viktar Simanenka <viteosen@xxxxxxxxx>
> ---
>  .../bindings/display/philips,pcd8544.yaml     |  92 ++++
>  drivers/gpu/drm/tiny/Kconfig                  |  11 +
>  drivers/gpu/drm/tiny/pcd8544.c                | 506 ++++++++++++++++++
>  3 files changed, 609 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/philips,pcd8544.yaml
>  create mode 100644 drivers/gpu/drm/tiny/pcd8544.c
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/display/philips,pcd8544.example.dts:21.13-23: Warning (reg_format): /example-0/display@0:reg: property has invalid length (4 bytes) (#address-cells == 1, #size-cells == 1)
Documentation/devicetree/bindings/display/philips,pcd8544.example.dtb: Warning (pci_device_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/display/philips,pcd8544.example.dtb: Warning (pci_device_bus_num): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/display/philips,pcd8544.example.dtb: Warning (simple_bus_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/display/philips,pcd8544.example.dtb: Warning (i2c_bus_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/display/philips,pcd8544.example.dtb: Warning (spi_bus_reg): Failed prerequisite 'reg_format'
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/display/philips,pcd8544.example.dtb: display@0: Unevaluated properties are not allowed ('write-only' was unexpected)
	from schema $id: http://devicetree.org/schemas/display/philips,pcd8544.yaml#

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20230718080727.323426-1-viteosen@xxxxxxxxx

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.




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