dt-bindings: phy: renesas: usb2-phy: convert bindings to json-schema
diff mbox series

Message ID 1571387933-23397-1-git-send-email-yoshihiro.shimoda.uh@renesas.com
State Superseded
Delegated to: Geert Uytterhoeven
Headers show
Series
  • dt-bindings: phy: renesas: usb2-phy: convert bindings to json-schema
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Commit Message

Yoshihiro Shimoda Oct. 18, 2019, 8:38 a.m. UTC
Convert Renesas R-Car generation 3 USB 2.0 PHY bindings documentation
to json-schema.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  70 --------------
 .../devicetree/bindings/phy/renesas,usb2-phy.yaml  | 106 +++++++++++++++++++++
 2 files changed, 106 insertions(+), 70 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
 create mode 100644 Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml

Comments

Rob Herring Oct. 29, 2019, 1:57 a.m. UTC | #1
On Fri, Oct 18, 2019 at 05:38:53PM +0900, Yoshihiro Shimoda wrote:
> Convert Renesas R-Car generation 3 USB 2.0 PHY bindings documentation
> to json-schema.
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> ---
>  .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  70 --------------
>  .../devicetree/bindings/phy/renesas,usb2-phy.yaml  | 106 +++++++++++++++++++++
>  2 files changed, 106 insertions(+), 70 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
>  create mode 100644 Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml


> diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> new file mode 100644
> index 00000000..0f109c2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> @@ -0,0 +1,106 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/renesas,usb2-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas R-Car generation 3 USB 2.0 PHY
> +
> +maintainers:
> +  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> +
> +properties:
> +  compatible:
> +    oneOf:

This:

> +      - items:
> +          - enum:
> +              - renesas,usb2-phy-r8a77470 # RZ/G1C

You can simplify to just:

         - const: renesas,usb2-phy-r8a77470 # RZ/G1C

> +      - items:
> +          - enum:
> +              - renesas,usb2-phy-r7s9210  # RZ/A2
> +              - renesas,usb2-phy-r8a774a1 # RZ/G2M
> +              - renesas,usb2-phy-r8a774b1 # RZ/G2N
> +              - renesas,usb2-phy-r8a774c0 # RZ/G2E
> +              - renesas,usb2-phy-r8a7795  # R-Car H3
> +              - renesas,usb2-phy-r8a7796  # R-Car M3-W
> +              - renesas,usb2-phy-r8a77965 # R-Car M3-N
> +              - renesas,usb2-phy-r8a77990 # R-Car E3
> +              - renesas,usb2-phy-r8a77995 # R-Car D3
> +          - const: renesas,rcar-gen3-usb2-phy
> +
> +  reg:
> +    # base address and length of the registers block for the PHY.
> +    maxItems: 1
> +
> +  clocks:
> +    # clock phandle and specifier pair(s).
> +    minItems: 1
> +    maxItems: 2
> +
> +  clock-names:
> +    # for RZ/A2
> +    minItems: 1
> +    maxItems: 2
> +    items:
> +      - const: fck
> +      - const: usb_x1
> +
> +  '#phy-cells':
> +    # see phy-bindings.txt in the same directory

Drop this so we don't have to fix later.

> +    enum: [0, 1]  # and 0 is deprecated.
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  resets:
> +    minItems: 1
> +    maxItems: 2

Needs 'items' to define each entry.

> +
> +  vbus-supply:
> +    $ref: /schemas/types.yaml#/definitions/phandle

Can drop this, *-supply already has a type.

> +    description: |
> +      Phandle to a regulator that provides power to the VBUS. This regulator
> +      will be managed during the PHY power on/off sequence.
> +
> +  renesas,no-otg-pins:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description: |
> +      specify when a board does not provide proper otg pins.
> +
> +  dr_mode:
> +    $ref: /schemas/types.yaml#/definitions/string

I think we already have a common definition, so just 'true' is enough.

> +    description: |
> +      indicates the working mode for the PHY. Can be "host", "peripheral", or
> +      "otg". Should be set if otg controller is not used.
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - '#phy-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/power/r8a7795-sysc.h>
> +
> +    usb-phy@ee080200 {
> +        compatible = "renesas,usb2-phy-r8a7795", "renesas,rcar-gen3-usb2-phy";
> +        reg = <0 0xee080200 0 0x700>;
> +        interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&cpg CPG_MOD 703>;
> +        #phy-cells = <1>;
> +    };
> +
> +    usb-phy@ee0a0200 {
> +        compatible = "renesas,usb2-phy-r8a7795", "renesas,rcar-gen3-usb2-phy";
> +        reg = <0 0xee0a0200 0 0x700>;
> +        clocks = <&cpg CPG_MOD 702>;
> +        #phy-cells = <1>;
> +    };
> -- 
> 2.7.4
>
Yoshihiro Shimoda Oct. 29, 2019, 4:14 a.m. UTC | #2
Hi Rob,

Thank you for your review!

> From: Rob Herring, Sent: Tuesday, October 29, 2019 10:57 AM
> 
> On Fri, Oct 18, 2019 at 05:38:53PM +0900, Yoshihiro Shimoda wrote:
> > Convert Renesas R-Car generation 3 USB 2.0 PHY bindings documentation
> > to json-schema.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > ---
> >  .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  70 --------------
> >  .../devicetree/bindings/phy/renesas,usb2-phy.yaml  | 106 +++++++++++++++++++++
> >  2 files changed, 106 insertions(+), 70 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> >  create mode 100644 Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> 
> 
> > diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > new file mode 100644
> > index 00000000..0f109c2
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > @@ -0,0 +1,106 @@
> > +# SPDX-License-Identifier: GPL-2.0-only
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/phy/renesas,usb2-phy.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas R-Car generation 3 USB 2.0 PHY
> > +
> > +maintainers:
> > +  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
> 
> This:

What does the "This:" mean? If I replaced the "oneOf:" with "This:",
the following error happens when "make dt_binding_check":

  SCHEMA  Documentation/devicetree/bindings/processed-schema.yaml
warning: no schema found in file: Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
[snip]/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml: ignoring, error in schema 'compatible'
Documentation/devicetree/bindings/Makefile:33: recipe for target 'Documentation/devicetree/bindings/processed-schema.yaml' failed
make[1]: *** [Documentation/devicetree/bindings/processed-schema.yaml] Error 255
Makefile:1263: recipe for target 'dt_binding_check' failed
make: *** [dt_binding_check] Error 2

> > +      - items:
> > +          - enum:
> > +              - renesas,usb2-phy-r8a77470 # RZ/G1C
> 
> You can simplify to just:
> 
>          - const: renesas,usb2-phy-r8a77470 # RZ/G1C

I'll fix it.

> > +      - items:
> > +          - enum:
> > +              - renesas,usb2-phy-r7s9210  # RZ/A2
> > +              - renesas,usb2-phy-r8a774a1 # RZ/G2M
> > +              - renesas,usb2-phy-r8a774b1 # RZ/G2N
> > +              - renesas,usb2-phy-r8a774c0 # RZ/G2E
> > +              - renesas,usb2-phy-r8a7795  # R-Car H3
> > +              - renesas,usb2-phy-r8a7796  # R-Car M3-W
> > +              - renesas,usb2-phy-r8a77965 # R-Car M3-N
> > +              - renesas,usb2-phy-r8a77990 # R-Car E3
> > +              - renesas,usb2-phy-r8a77995 # R-Car D3
> > +          - const: renesas,rcar-gen3-usb2-phy
> > +
> > +  reg:
> > +    # base address and length of the registers block for the PHY.
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    # clock phandle and specifier pair(s).
> > +    minItems: 1
> > +    maxItems: 2
> > +
> > +  clock-names:
> > +    # for RZ/A2
> > +    minItems: 1
> > +    maxItems: 2
> > +    items:
> > +      - const: fck
> > +      - const: usb_x1
> > +
> > +  '#phy-cells':
> > +    # see phy-bindings.txt in the same directory
> 
> Drop this so we don't have to fix later.

I'll drop this.

> > +    enum: [0, 1]  # and 0 is deprecated.
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +  resets:
> > +    minItems: 1
> > +    maxItems: 2
> 
> Needs 'items' to define each entry.

I'll add "items:" and two "description:" on the resets property.

> > +
> > +  vbus-supply:
> > +    $ref: /schemas/types.yaml#/definitions/phandle
> 
> Can drop this, *-supply already has a type.

I'll drop it.

> > +    description: |
> > +      Phandle to a regulator that provides power to the VBUS. This regulator
> > +      will be managed during the PHY power on/off sequence.
> > +
> > +  renesas,no-otg-pins:
> > +    $ref: /schemas/types.yaml#/definitions/flag
> > +    description: |
> > +      specify when a board does not provide proper otg pins.
> > +
> > +  dr_mode:
> > +    $ref: /schemas/types.yaml#/definitions/string
> 
> I think we already have a common definition, so just 'true' is enough.

I'll fix it.

Best regards,
Yoshihiro Shimoda
Rob Herring Oct. 29, 2019, 8:19 p.m. UTC | #3
On Mon, Oct 28, 2019 at 11:14 PM Yoshihiro Shimoda
<yoshihiro.shimoda.uh@renesas.com> wrote:
>
> Hi Rob,
>
> Thank you for your review!
>
> > From: Rob Herring, Sent: Tuesday, October 29, 2019 10:57 AM
> >
> > On Fri, Oct 18, 2019 at 05:38:53PM +0900, Yoshihiro Shimoda wrote:
> > > Convert Renesas R-Car generation 3 USB 2.0 PHY bindings documentation
> > > to json-schema.
> > >
> > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > > ---
> > >  .../devicetree/bindings/phy/rcar-gen3-phy-usb2.txt |  70 --------------
> > >  .../devicetree/bindings/phy/renesas,usb2-phy.yaml  | 106 +++++++++++++++++++++
> > >  2 files changed, 106 insertions(+), 70 deletions(-)
> > >  delete mode 100644 Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> > >  create mode 100644 Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> >
> >
> > > diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > > new file mode 100644
> > > index 00000000..0f109c2
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > > @@ -0,0 +1,106 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/phy/renesas,usb2-phy.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Renesas R-Car generation 3 USB 2.0 PHY
> > > +
> > > +maintainers:
> > > +  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > > +
> > > +properties:
> > > +  compatible:
> > > +    oneOf:
> >
> > This:
>
> What does the "This:" mean?

I was referring to the 3 lines below. I was trying to be clear which
lines to replace with just 'const'.

> If I replaced the "oneOf:" with "This:",
> the following error happens when "make dt_binding_check":
>
>   SCHEMA  Documentation/devicetree/bindings/processed-schema.yaml
> warning: no schema found in file: Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> [snip]/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml: ignoring, error in schema 'compatible'
> Documentation/devicetree/bindings/Makefile:33: recipe for target 'Documentation/devicetree/bindings/processed-schema.yaml' failed
> make[1]: *** [Documentation/devicetree/bindings/processed-schema.yaml] Error 255
> Makefile:1263: recipe for target 'dt_binding_check' failed
> make: *** [dt_binding_check] Error 2
>
> > > +      - items:
> > > +          - enum:
> > > +              - renesas,usb2-phy-r8a77470 # RZ/G1C
> >
> > You can simplify to just:
> >
> >          - const: renesas,usb2-phy-r8a77470 # RZ/G1C
>
> I'll fix it.
Yoshihiro Shimoda Oct. 30, 2019, 2:28 a.m. UTC | #4
Hi Rob,

> From: Rob Herring, Sent: Wednesday, October 30, 2019 5:20 AM
> 
> On Mon, Oct 28, 2019 at 11:14 PM Yoshihiro Shimoda
> <yoshihiro.shimoda.uh@renesas.com> wrote:
<snip>
> > > > diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > > b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > > > new file mode 100644
> > > > index 00000000..0f109c2
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > > > @@ -0,0 +1,106 @@
> > > > +# SPDX-License-Identifier: GPL-2.0-only
> > > > +%YAML 1.2
> > > > +---
> > > > +$id: http://devicetree.org/schemas/phy/renesas,usb2-phy.yaml#
> > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > +
> > > > +title: Renesas R-Car generation 3 USB 2.0 PHY
> > > > +
> > > > +maintainers:
> > > > +  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    oneOf:
> > >
> > > This:
> >
> > What does the "This:" mean?
> 
> I was referring to the 3 lines below. I was trying to be clear which
> lines to replace with just 'const'.

Thank you for the reply! I understood it.

Best regards,
Yoshihiro Shimoda

> > If I replaced the "oneOf:" with "This:",
> > the following error happens when "make dt_binding_check":
> >
> >   SCHEMA  Documentation/devicetree/bindings/processed-schema.yaml
> > warning: no schema found in file: Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> > [snip]/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml: ignoring, error in schema 'compatible'
> > Documentation/devicetree/bindings/Makefile:33: recipe for target
> 'Documentation/devicetree/bindings/processed-schema.yaml' failed
> > make[1]: *** [Documentation/devicetree/bindings/processed-schema.yaml] Error 255
> > Makefile:1263: recipe for target 'dt_binding_check' failed
> > make: *** [dt_binding_check] Error 2
> >
> > > > +      - items:
> > > > +          - enum:
> > > > +              - renesas,usb2-phy-r8a77470 # RZ/G1C
> > >
> > > You can simplify to just:
> > >
> > >          - const: renesas,usb2-phy-r8a77470 # RZ/G1C
> >
> > I'll fix it.

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
deleted file mode 100644
index 7734b21..00000000
--- a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
+++ /dev/null
@@ -1,70 +0,0 @@ 
-* Renesas R-Car generation 3 USB 2.0 PHY
-
-This file provides information on what the device node for the R-Car generation
-3, RZ/G1C, RZ/G2 and RZ/A2 USB 2.0 PHY contain.
-
-Required properties:
-- compatible: "renesas,usb2-phy-r7s9210" if the device is a part of an R7S9210
-	      SoC.
-	      "renesas,usb2-phy-r8a77470" if the device is a part of an R8A77470
-	      SoC.
-	      "renesas,usb2-phy-r8a774a1" if the device is a part of an R8A774A1
-	      SoC.
-	      "renesas,usb2-phy-r8a774b1" if the device is a part of an R8A774B1
-	      SoC.
-	      "renesas,usb2-phy-r8a774c0" if the device is a part of an R8A774C0
-	      SoC.
-	      "renesas,usb2-phy-r8a7795" if the device is a part of an R8A7795
-	      SoC.
-	      "renesas,usb2-phy-r8a7796" if the device is a part of an R8A7796
-	      SoC.
-	      "renesas,usb2-phy-r8a77965" if the device is a part of an
-	      R8A77965 SoC.
-	      "renesas,usb2-phy-r8a77990" if the device is a part of an
-	      R8A77990 SoC.
-	      "renesas,usb2-phy-r8a77995" if the device is a part of an
-	      R8A77995 SoC.
-	      "renesas,rcar-gen3-usb2-phy" for a generic R-Car Gen3, RZ/G2 or
-	      RZ/A2 compatible device.
-
-	      When compatible with the generic version, nodes must list the
-	      SoC-specific version corresponding to the platform first
-	      followed by the generic version.
-
-- reg: offset and length of the partial USB 2.0 Host register block.
-- clocks: clock phandle and specifier pair(s).
-- #phy-cells: see phy-bindings.txt in the same directory, must be <1> (and
-	      using <0> is deprecated).
-
-The phandle's argument in the PHY specifier is the INT_STATUS bit of controller:
-- 1 = USBH_INTA (OHCI)
-- 2 = USBH_INTB (EHCI)
-- 3 = UCOM_INT (OTG and BC)
-
-Optional properties:
-To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are
-combined, the device tree node should set interrupt properties to use the
-channel as USB OTG:
-- interrupts: interrupt specifier for the PHY.
-- vbus-supply: Phandle to a regulator that provides power to the VBUS. This
-	       regulator will be managed during the PHY power on/off sequence.
-- renesas,no-otg-pins: boolean, specify when a board does not provide proper
-		       otg pins.
-- dr_mode: string, indicates the working mode for the PHY. Can be "host",
-           "peripheral", or "otg". Should be set if otg controller is not used.
-
-
-Example (R-Car H3):
-
-	usb-phy@ee080200 {
-		compatible = "renesas,usb2-phy-r8a7795", "renesas,rcar-gen3-usb2-phy";
-		reg = <0 0xee080200 0 0x700>;
-		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 703>;
-	};
-
-	usb-phy@ee0a0200 {
-		compatible = "renesas,usb2-phy-r8a7795", "renesas,rcar-gen3-usb2-phy";
-		reg = <0 0xee0a0200 0 0x700>;
-		clocks = <&cpg CPG_MOD 702>;
-	};
diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
new file mode 100644
index 00000000..0f109c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
@@ -0,0 +1,106 @@ 
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/renesas,usb2-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car generation 3 USB 2.0 PHY
+
+maintainers:
+  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - renesas,usb2-phy-r8a77470 # RZ/G1C
+      - items:
+          - enum:
+              - renesas,usb2-phy-r7s9210  # RZ/A2
+              - renesas,usb2-phy-r8a774a1 # RZ/G2M
+              - renesas,usb2-phy-r8a774b1 # RZ/G2N
+              - renesas,usb2-phy-r8a774c0 # RZ/G2E
+              - renesas,usb2-phy-r8a7795  # R-Car H3
+              - renesas,usb2-phy-r8a7796  # R-Car M3-W
+              - renesas,usb2-phy-r8a77965 # R-Car M3-N
+              - renesas,usb2-phy-r8a77990 # R-Car E3
+              - renesas,usb2-phy-r8a77995 # R-Car D3
+          - const: renesas,rcar-gen3-usb2-phy
+
+  reg:
+    # base address and length of the registers block for the PHY.
+    maxItems: 1
+
+  clocks:
+    # clock phandle and specifier pair(s).
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    # for RZ/A2
+    minItems: 1
+    maxItems: 2
+    items:
+      - const: fck
+      - const: usb_x1
+
+  '#phy-cells':
+    # see phy-bindings.txt in the same directory
+    enum: [0, 1]  # and 0 is deprecated.
+
+  interrupts:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    minItems: 1
+    maxItems: 2
+
+  vbus-supply:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: |
+      Phandle to a regulator that provides power to the VBUS. This regulator
+      will be managed during the PHY power on/off sequence.
+
+  renesas,no-otg-pins:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      specify when a board does not provide proper otg pins.
+
+  dr_mode:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: |
+      indicates the working mode for the PHY. Can be "host", "peripheral", or
+      "otg". Should be set if otg controller is not used.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - '#phy-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a7795-sysc.h>
+
+    usb-phy@ee080200 {
+        compatible = "renesas,usb2-phy-r8a7795", "renesas,rcar-gen3-usb2-phy";
+        reg = <0 0xee080200 0 0x700>;
+        interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD 703>;
+        #phy-cells = <1>;
+    };
+
+    usb-phy@ee0a0200 {
+        compatible = "renesas,usb2-phy-r8a7795", "renesas,rcar-gen3-usb2-phy";
+        reg = <0 0xee0a0200 0 0x700>;
+        clocks = <&cpg CPG_MOD 702>;
+        #phy-cells = <1>;
+    };