linux-kernel - Re: [PATCH] dt-bindings: spi: convert Cadence SPI bindings to YAML

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Date:   Sat, 5 Jun 2021 09:24:32 +0900
From:   Nobuhiro Iwamatsu <iwamatsu@...auri.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Mark Brown <broonie@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        linux-spi <linux-spi@...r.kernel.org>,
        devicetree@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Harini Katakam <harinik@...inx.com>,
        linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] dt-bindings: spi: convert Cadence SPI bindings to YAML

Hi,

Thanks for your review.

2021年6月5日(土) 6:46 Rob Herring <robh@...nel.org>:
>
> On Mon, May 31, 2021 at 11:15:38PM +0900, Nobuhiro Iwamatsu wrote:
> > Convert spi for Cadence SPI bindings documentation to YAML.
> >
> > Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@...auri.org>
> > ---
> >  .../devicetree/bindings/spi/spi-cadence.txt   | 30 ---------
> >  .../devicetree/bindings/spi/spi-cadence.yaml  | 63 +++++++++++++++++++
> >  2 files changed, 63 insertions(+), 30 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/spi/spi-cadence.txt
> >  create mode 100644 Documentation/devicetree/bindings/spi/spi-cadence.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/spi/spi-cadence.txt b/Documentation/devicetree/bindings/spi/spi-cadence.txt
> > deleted file mode 100644
> > index 05a2ef945664be..00000000000000
> > --- a/Documentation/devicetree/bindings/spi/spi-cadence.txt
> > +++ /dev/null
> > @@ -1,30 +0,0 @@
> > -Cadence SPI controller Device Tree Bindings
> > --------------------------------------------
> > -
> > -Required properties:
> > -- compatible         : Should be "cdns,spi-r1p6" or "xlnx,zynq-spi-r1p6".
> > -- reg                        : Physical base address and size of SPI registers map.
> > -- interrupts         : Property with a value describing the interrupt
> > -                       number.
> > -- clock-names                : List of input clock names - "ref_clk", "pclk"
> > -                       (See clock bindings for details).
> > -- clocks             : Clock phandles (see clock bindings for details).
> > -
> > -Optional properties:
> > -- num-cs             : Number of chip selects used.
> > -                       If a decoder is used, this will be the number of
> > -                       chip selects after the decoder.
> > -- is-decoded-cs              : Flag to indicate whether decoder is used or not.
> > -
> > -Example:
> > -
> > -     spi@...07000 {
> > -             compatible = "xlnx,zynq-spi-r1p6";
> > -             clock-names = "ref_clk", "pclk";
> > -             clocks = <&clkc 26>, <&clkc 35>;
> > -             interrupt-parent = <&intc>;
> > -             interrupts = <0 49 4>;
> > -             num-cs = <4>;
> > -             is-decoded-cs = <0>;
> > -             reg = <0xe0007000 0x1000>;
> > -     } ;
> > diff --git a/Documentation/devicetree/bindings/spi/spi-cadence.yaml b/Documentation/devicetree/bindings/spi/spi-cadence.yaml
> > new file mode 100644
> > index 00000000000000..27a7121ed0f9ae
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/spi/spi-cadence.yaml
> > @@ -0,0 +1,63 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/spi/spi-cadence.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Cadence SPI controller Device Tree Bindings
> > +
> > +maintainers:
> > +  - Michal Simek <michal.simek@...inx.com>
> > +
> > +allOf:
> > +  - $ref: "spi-controller.yaml#"
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - cdns,spi-r1p6
> > +      - xlnx,zynq-spi-r1p6
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  clock-names:
> > +    items:
> > +      - const: ref_clk
> > +      - const: pclk
> > +
> > +  clocks:
> > +    maxItems: 2
> > +
> > +  num-cs:
> > +    description: |
> > +      Number of chip selects used. If a decoder is used,
> > +      this will be the number of chip selects after the
> > +      decoder.
> > +    minimum: 1
> > +    maximum: 4
> > +    default: 4
> > +
> > +  is-decoded-cs:
>
> Needs a type ref. Despite being called a 'flag' looks like it's an
> uint32. Presumably, it also needs:
>
> enum: [ 0, 1 ]

Yeah, this is a flag, but the driver source code uses it as u32.
So, I will add ref and enum, thanks.

>
> > +    description: |
> > +      Flag to indicate whether decoder is used or not.
> > +    default: 0

Best regards,
  Nobuhiro