linux-kernel - Re: [PATCH v2] dt-bindings: devicetree: explain how to get CS active-high

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Message-Id: <173394139968.3514802.10365052671543587756.robh@kernel.org>
Date: Wed, 11 Dec 2024 12:23:19 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Iker Pedrosa <ikerpedrosam@...il.com>
Cc: linux-spi@...r.kernel.org, krzk+dt@...nel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 javierm@...hat.com, conor+dt@...nel.org, broonie@...nel.org
Subject: Re: [PATCH v2] dt-bindings: devicetree: explain how to get CS
 active-high


On Wed, 11 Dec 2024 17:50:50 +0100, Iker Pedrosa wrote:
> The current documentation does not clearly explain how to invert the SPI
> CS signal to make it active-high. This makes it very difficult to
> understand.
> 
> This patch adds a simple explanation on how to set the CS line in
> active-high and adds an example to make it easier for users who need
> that setup for their SPI peripherals.
> 
> Link: https://forums.raspberrypi.com/viewtopic.php?t=378222
> Signed-off-by: Iker Pedrosa <ikerpedrosam@...il.com>
> ---
>  .../bindings/spi/spi-controller.yaml          | 25 +++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/spi/spi-controller.example.dtb: /example-1/spi@...04000/display@0: failed to match any schema with compatible: ['sitronix,st7920']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20241211165054.254164-1-ikerpedrosam@gmail.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.