linux-kernel - Re: [PATCH v3 2/4] dt-bindings: net: silabs, wfx: add prt, prtt1c-wfm200 antenna variant

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Message-ID: <20220426083305.GA17577@pengutronix.de>
Date:   Tue, 26 Apr 2022 10:33:05 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Jérôme Pouiller <jerome.pouiller@...abs.com>
Cc:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        kernel@...gutronix.de, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 2/4] dt-bindings: net: silabs, wfx: add prt,
 prtt1c-wfm200 antenna variant

On Tue, Apr 26, 2022 at 10:19:29AM +0200, Jérôme Pouiller wrote:
> On Tuesday 26 April 2022 09:21:13 CEST Oleksij Rempel wrote:
> > On Mon, Apr 25, 2022 at 05:38:20PM +0200, Jérôme Pouiller wrote:
> > > On Monday 25 April 2022 15:28:42 CEST Oleksij Rempel wrote:
> > > > Add compatible for wfm200 antenna configuration variant for Protonic PRTT1C
> > > > board.
> > > >
> > > > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> > > > ---
> > > >  .../devicetree/bindings/staging/net/wireless/silabs,wfx.yaml     | 1 +
> > > >  1 file changed, 1 insertion(+)
> > > >
> > > > diff --git a/Documentation/devicetree/bindings/staging/net/wireless/silabs,wfx.yaml b/Documentation/devicetree/bindings/staging/net/wireless/silabs,wfx.yaml
> > > > index 105725a127ab..ce107fe45d7c 100644
> > > > --- a/Documentation/devicetree/bindings/staging/net/wireless/silabs,wfx.yaml
> > > > +++ b/Documentation/devicetree/bindings/staging/net/wireless/silabs,wfx.yaml
> > > > @@ -39,6 +39,7 @@ properties:
> > > >    compatible:
> > > >      items:
> > > >        - enum:
> > > > +          - prt,prtt1c-wfm200 # Protonic PRTT1C Board
> > > >            - silabs,brd4001a # WGM160P Evaluation Board
> > > >            - silabs,brd8022a # WF200 Evaluation Board
> > > >            - silabs,brd8023a # WFM200 Evaluation Board
> > >
> > > I think you also have to declare this new entry in wfx_sdio_of_match,
> > > and/or wfx_spi_of_match and wfx_spi_id.
> > >
> > > On the WFM200 variant, the antenna is built in the chip. So I think you
> > > can point on the same configuration than the brd8023a.
> > 
> > I assume driver update can be made in a separate patch. As soon as we
> > reserved compatible for this boards there should be no conflicts. This patches
> > series is targeting only devicetree and needed DT schema changes.
> 
> hmmm... I am not DT specialist, but it seems a bit weird to have a new
> entry in the dt schema, but no new code in any of_match table. 

Here is one example:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml?h=v5.18-rc4#n28
properties:
  compatible:
    oneOf:
      - const: fsl,imx1-cspi
      - const: fsl,imx21-cspi
      - const: fsl,imx27-cspi
      - const: fsl,imx31-cspi
      - const: fsl,imx35-cspi
      - const: fsl,imx51-ecspi
      - const: fsl,imx53-ecspi
      - items:
          - enum:
              - fsl,imx50-ecspi
              - fsl,imx6q-ecspi
              - fsl,imx6sx-ecspi
              - fsl,imx6sl-ecspi
              - fsl,imx6sll-ecspi
              - fsl,imx6ul-ecspi
              - fsl,imx7d-ecspi
              - fsl,imx8mq-ecspi
              - fsl,imx8mm-ecspi
              - fsl,imx8mn-ecspi
              - fsl,imx8mp-ecspi
          - const: fsl,imx51-ecspi

httpt://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/spi/spi-imx.c?h=v5.18-rc4#n1063
static const struct of_device_id spi_imx_dt_ids[] = {
	{ .compatible = "fsl,imx1-cspi", .data = &imx1_cspi_devtype_data, },
	{ .compatible = "fsl,imx21-cspi", .data = &imx21_cspi_devtype_data, },
	{ .compatible = "fsl,imx27-cspi", .data = &imx27_cspi_devtype_data, },
	{ .compatible = "fsl,imx31-cspi", .data = &imx31_cspi_devtype_data, },
	{ .compatible = "fsl,imx35-cspi", .data = &imx35_cspi_devtype_data, },
	{ .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, },
	{ .compatible = "fsl,imx53-ecspi", .data = &imx53_ecspi_devtype_data, },
	{ .compatible = "fsl,imx6ul-ecspi", .data = &imx6ul_ecspi_devtype_data, },
	{ /* sentinel */ }
};

Regards,
Oleksij
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