linux-kernel - Re: [PATCH 1/1] spi: dt-bindings: fsl-dspi: Convert to yaml format

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Date: Thu, 30 May 2024 18:02:08 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Frank Li <Frank.Li@....com>
Cc: Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	"open list:SPI SUBSYSTEM" <linux-spi@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>, imx@...ts.linux.dev
Subject: Re: [PATCH 1/1] spi: dt-bindings: fsl-dspi: Convert to yaml format

Hi Frank,

On Wed, May 29, 2024 at 03:36:50PM -0400, Frank Li wrote:
> Convert dt-binding spi-fsl-dspi.txt to yaml format.
> 
> Addtional changes during convert:
> - compatible string "fsl,ls1028a-dspi" can be followed by
> fsl,ls1021a-v1.0-dspi
> - Change "dspi0@...2c000" to "spi@...2c000" in example
> - Reorder properties in example
> - Use GIC include in example
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> 
> Notes:
>     pass dt_binding_check
>     
>     make dt_binding_check DT_SCHEMA_FILES=fsl,dspi.yaml
>       SCHEMA  Documentation/devicetree/bindings/processed-schema.json
>       CHKDT   Documentation/devicetree/bindings
>       LINT    Documentation/devicetree/bindings
>       DTEX    Documentation/devicetree/bindings/spi/fsl,dspi.example.dts
>       DTC_CHK Documentation/devicetree/bindings/spi/fsl,dspi.example.dtb
> 
>  .../devicetree/bindings/spi/fsl,dspi.yaml     | 126 ++++++++++++++++++
>  .../devicetree/bindings/spi/spi-fsl-dspi.txt  |  65 ---------
>  2 files changed, 126 insertions(+), 65 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/spi/fsl,dspi.yaml
>  delete mode 100644 Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
> 
> diff --git a/Documentation/devicetree/bindings/spi/fsl,dspi.yaml b/Documentation/devicetree/bindings/spi/fsl,dspi.yaml
> new file mode 100644
> index 0000000000000..12a67b2cc25c8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/fsl,dspi.yaml
> @@ -0,0 +1,126 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/fsl,dspi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARM Freescale DSPI controller
> +
> +maintainers:
> +  - Frank Li <Frank.Li@....com>
> +
> +properties:
> +  fsl,spi-cs-sck-delay:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      a delay in nanoseconds between activating chip
> +      select and the start of clock signal, at the start of a transfer.
> +  fsl,spi-sck-cs-delay:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      a delay in nanoseconds between stopping the clock
> +      signal and deactivating chip select, at the end of a transfer.

Thanks for this patch and for picking up on this task.

But fsl,spi-cs-sck-delay and fsl,spi-sck-cs-delay are not controller
properties as this schema makes them appear, but rather, child node
properties.

Could you try and take a look at how the previous attempt went, and
incorporate some of its good parts?
https://lore.kernel.org/linux-spi/20221111224651.577729-1-vladimir.oltean@nxp.com/