Re: [PATCH 1/4] dt-bindings: usb: chipidea: Convert to json-schema

[Thierry Reding <thierry.reding@gmail.com>]

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On Wed, Dec 15, 2021 at 01:25:08PM -0600, Rob Herring wrote:
> On Thu, Dec 09, 2021 at 05:53:36PM +0100, Thierry Reding wrote:
> > From: Thierry Reding <treding@nvidia.com>
> > 
> > Convert the ChipIdea USB2 bindings from the free-form text format to
> > json-schema.
> > 
> > Signed-off-by: Thierry Reding <treding@nvidia.com>
> > ---
> >  .../bindings/usb/chipidea,usb2.yaml           | 310 ++++++++++++++++++
> >  .../devicetree/bindings/usb/ci-hdrc-usb2.txt  | 158 ---------
> >  2 files changed, 310 insertions(+), 158 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/usb/chipidea,usb2.yaml
> >  delete mode 100644 Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/chipidea,usb2.yaml b/Documentation/devicetree/bindings/usb/chipidea,usb2.yaml
> > new file mode 100644
> > index 000000000000..0e36259f23ba
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/usb/chipidea,usb2.yaml
> > @@ -0,0 +1,310 @@
> > +# SPDX-License-Identifier: GPL-2.0-only
> > +%YAML 1.2
> > +---
> > +$id: "http://devicetree.org/schemas/usb/chipidea,usb2.yaml#"
> > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> > +
> > +title: USB2 ChipIdea USB controller for ci13xxx
> > +
> > +maintainers:
> > +  - Peter Chen <peter.chen@freescale.com>
> 
> This should have a reference to usb-drd.yaml I think.
> 
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
> > +      - enum:
> > +          - fsl,imx23-usb
> > +          - fsl,imx27-usb
> > +          - fsl,imx28-usb
> > +          - fsl,imx6q-usb
> > +          - fsl,imx6sl-usb
> > +          - fsl,imx6sx-usb
> > +          - fsl,imx6ul-usb
> > +          - fsl,imx7d-usb
> > +          - fsl,imx7ulp-usb
> > +          - lsi,zevio-usb
> > +          - qcom,ci-hdrc
> > +          - chipidea,usb2
> > +          - xlnx,zynq-usb-2.20a
> > +          - nvidia,tegra20-udc
> > +          - nvidia,tegra30-udc
> > +          - nvidia,tegra114-udc
> > +          - nvidia,tegra124-udc
> > +      - items:
> > +          - const: fsl,imx6q-usb
> > +          - const: fsl,imx27-usb
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  phy_type:
> > +    $ref: /schemas/types.yaml#/definitions/string
> > +    description: The type of the PHY connected to the core. Without this property the PORTSC
> > +      register won't be touched.
> > +    enum:
> > +      - utmi
> > +      - utmi_wide
> > +      - ulpi
> > +      - serial
> > +      - hsic
> > +
> > +  dr_mode:
> > +    $ref: /schemas/types.yaml#/definitions/string
> > +    description: dual-role mode of the interface
> > +    enum:
> > +      - host
> > +      - peripheral
> > +      - otg
> > +    default:
> > +      const: otg
> > +
> > +  clocks:
> > +    items:
> > +      - description: reference to the USB clock
> 
> From the report, i.MX needs 3 clocks.

Okay, I'll look into that.

> > +  # USB bus
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> 
> Covered by common schema (I think).

Yeah, so this can be both used in peripheral mode and host mode, so it
probably needs usb-hcd.yaml and usb-drd.yaml, and then #address-cells
and #size-cells will get pulled in.

> 
> > +
> > +patternProperties:
> > +  "^pinctrl-[0-9]+$": true
> > +
> > +additionalProperties:
> > +  $ref: usb-device.yaml
> 
> This is wrong as usb.device.yaml applies to child nodes.

Originally the idea behind this was that any additionalProperties would
have to be child nodes that represent hard-wired USB devices. Given the
above and that I'm now including usb-hcd.yaml here, this is taken care
of automatically.

Thierry

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