[PATCH v2] dt-bindings: usb: Convert Allwinner A80 USB PHY controller to a schema

Rob Herring robh at kernel.org
Mon Jan 6 13:51:29 PST 2020


On Mon, Jan 06, 2020 at 10:27:24AM +0100, Maxime Ripard wrote:
> Hi Rob,
> 
> On Sat, Jan 04, 2020 at 03:13:21PM -0700, Rob Herring wrote:
> > On Fri, Jan 03, 2020 at 04:28:24PM +0100, Maxime Ripard wrote:
> > > The Allwinner A80 SoCs have a USB PHY controller that is used by Linux,
> > > with a matching Device Tree binding.
> > >
> > > Now that we have the DT validation in place, let's convert the device tree
> > > bindings for that controller over to a YAML schemas.
> > >
> > > Reviewed-by: Chen-Yu Tsai <wens at csie.org>
> > > Signed-off-by: Maxime Ripard <maxime at cerno.tech>
> > >
> > > ---
> > >
> > > Changes from v1:
> > >   - Added r-b tag from chen-yu
> > > ---
> > >  .../phy/allwinner,sun9i-a80-usb-phy.yaml      | 135 ++++++++++++++++++
> > >  .../devicetree/bindings/phy/sun9i-usb-phy.txt |  37 -----
> > >  2 files changed, 135 insertions(+), 37 deletions(-)
> > >  create mode 100644 Documentation/devicetree/bindings/phy/allwinner,sun9i-a80-usb-phy.yaml
> > >  delete mode 100644 Documentation/devicetree/bindings/phy/sun9i-usb-phy.txt
> > >
> > > diff --git a/Documentation/devicetree/bindings/phy/allwinner,sun9i-a80-usb-phy.yaml b/Documentation/devicetree/bindings/phy/allwinner,sun9i-a80-usb-phy.yaml
> > > new file mode 100644
> > > index 000000000000..ded7d6f0a119
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/phy/allwinner,sun9i-a80-usb-phy.yaml
> > > @@ -0,0 +1,135 @@
> > > +# SPDX-License-Identifier: GPL-2.0
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/phy/allwinner,sun9i-a80-usb-phy.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Allwinner A80 USB PHY Device Tree Bindings
> > > +
> > > +maintainers:
> > > +  - Chen-Yu Tsai <wens at csie.org>
> > > +  - Maxime Ripard <mripard at kernel.org>
> > > +
> > > +properties:
> > > +  "#phy-cells":
> > > +    const: 0
> > > +
> > > +  compatible:
> > > +    const: allwinner,sun9i-a80-usb-phy
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  clocks:
> > > +    anyOf:
> > > +      - description: Main PHY Clock
> > > +
> > > +      - items:
> > > +          - description: Main PHY clock
> > > +          - description: HSIC 12MHz clock
> > > +          - description: HSIC 480MHz clock
> >
> > Rather than anyOf, just 'minItems: 1' would work here. Though I guess
> > this disallows 2 items.
> 
> Yeah, 2 items is not allowed so I wanted to prevent that.
> 
> > > +
> > > +  clock-names:
> > > +    oneOf:
> > > +      - const: phy
> > > +
> > > +      - items:
> > > +          - const: phy
> > > +          - const: hsic_12M
> > > +          - const: hsic_480M
> > > +
> > > +  resets:
> > > +    anyOf:
> > > +      - description: Normal USB PHY reset
> > > +
> > > +      - items:
> > > +          - description: Normal USB PHY reset
> > > +          - description: HSIC Reset
> > > +
> > > +  reset-names:
> > > +    oneOf:
> > > +      - const: phy
> > > +
> > > +      - items:
> > > +          - const: phy
> > > +          - const: hsic
> > > +
> > > +  phy_type:
> > > +    const: hsic
> > > +    description:
> > > +      When absent, the PHY type will be assumed to be normal USB.
> > > +
> > > +  phy-supply:
> > > +    description:
> > > +      Regulator that powers VBUS
> > > +
> > > +required:
> > > +  - "#phy-cells"
> > > +  - compatible
> > > +  - reg
> > > +  - clocks
> > > +  - clock-names
> > > +  - resets
> > > +  - reset-names
> > > +
> > > +additionalProperties: false
> > > +
> > > +if:
> > > +  properties:
> > > +    phy_type:
> > > +      const: hsic
> > > +
> > > +  required:
> > > +    - phy_type
> > > +
> > > +then:
> > > +  properties:
> > > +    clocks:
> > > +      maxItems: 3
> > > +
> > > +    clock-names:
> > > +      maxItems: 3
> > > +
> > > +    resets:
> > > +      maxItems: 2
> > > +
> > > +    reset-names:
> > > +      maxItems: 2
> >
> > Do you intend that only a single item is allowed when not HSIC? If so,
> > that's not what is happening.
> 
> That's intentional indeed, the former binding was making the hsic
> clocks and resets mandatory when the phy was in HSIC mode, but only
> recommending listing them otherwise. Maybe we can change that in the
> future, but that seems out of scope for a conversion.

Okay. In that case,

Reviewed-by: Rob Herring <robh at kernel.org>



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