[PATCH] dt-bindings: usb: dwc3: Move Amlogic G12A DWC3 Glue Bindings to YAML schemas

[PATCH] dt-bindings: usb: dwc3: Move Amlogic G12A DWC3 Glue Bindings to YAML schemas

[Neil Armstrong]

Now that we have the DT validation in place, let's convert the device tree
bindings for the Amlogic G12A DWC3 Glue Bindings over to a YAML schemas,
the AXG and GXL glue bindings will be converted later.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 .../devicetree/bindings/usb/amlogic,dwc3.txt  |  88 ------------
 .../usb/amlogic,meson-g12a-usb-ctrl.yaml      | 132 ++++++++++++++++++
 2 files changed, 132 insertions(+), 88 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml

diff --git a/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
index b9f04e617eb7..9a8b631904fd 100644
--- a/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
@@ -40,91 +40,3 @@ Example device nodes:
 				phy-names = "usb2-phy", "usb3-phy";
 			};
 		};
-
-Amlogic Meson G12A DWC3 USB SoC Controller Glue
-
-The Amlogic G12A embeds a DWC3 USB IP Core configured for USB2 and USB3
-in host-only mode, and a DWC2 IP Core configured for USB2 peripheral mode
-only.
-
-A glue connects the DWC3 core to USB2 PHYs and optionnaly to an USB3 PHY.
-
-One of the USB2 PHY can be re-routed in peripheral mode to a DWC2 USB IP.
-
-The DWC3 Glue controls the PHY routing and power, an interrupt line is
-connected to the Glue to serve as OTG ID change detection.
-
-Required properties:
-- compatible:	Should be "amlogic,meson-g12a-usb-ctrl"
-- clocks:	a handle for the "USB" clock
-- resets:	a handle for the shared "USB" reset line
-- reg:		The base address and length of the registers
-- interrupts:	the interrupt specifier for the OTG detection
-- phys: 	handle to used PHYs on the system
-	- a <0> phandle can be used if a PHY is not used
-- phy-names:	names of the used PHYs on the system :
-	- "usb2-phy0" for USB2 PHY0 if USBHOST_A port is used
-	- "usb2-phy1" for USB2 PHY1 if USBOTG_B port is used
-	- "usb3-phy0" for USB3 PHY if USB3_0 is used
-- dr_mode:	should be "host", "peripheral", or "otg" depending on
-	the usage and configuration of the OTG Capable port.
-	- "host" and "peripheral" means a fixed Host or Device only connection
-	- "otg" means the port can be used as both Host or Device and
-	  be switched automatically using the OTG ID pin.
-
-Optional properties:
-- vbus-supply:	should be a phandle to the regulator controlling the VBUS
-		power supply when used in OTG switchable mode
-
-Required child nodes:
-
-A child node must exist to represent the core DWC3 IP block. The name of
-the node is not important. The content of the node is defined in dwc3.txt.
-
-A child node must exist to represent the core DWC2 IP block. The name of
-the node is not important. The content of the node is defined in dwc2.txt.
-
-PHY documentation is provided in the following places:
-- Documentation/devicetree/bindings/phy/meson-g12a-usb2-phy.txt
-- Documentation/devicetree/bindings/phy/meson-g12a-usb3-pcie-phy.txt
-
-Example device nodes:
-	usb: usb@ffe09000 {
-			compatible = "amlogic,meson-g12a-usb-ctrl";
-			reg = <0x0 0xffe09000 0x0 0xa0>;
-			interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
-			#address-cells = <2>;
-			#size-cells = <2>;
-			ranges;
-
-			clocks = <&clkc CLKID_USB>;
-			resets = <&reset RESET_USB>;
-
-			dr_mode = "otg";
-
-			phys = <&usb2_phy0>, <&usb2_phy1>,
-			       <&usb3_pcie_phy PHY_TYPE_USB3>;
-			phy-names = "usb2-phy0", "usb2-phy1", "usb3-phy0";
-
-			dwc2: usb@ff400000 {
-				compatible = "amlogic,meson-g12a-usb", "snps,dwc2";
-				reg = <0x0 0xff400000 0x0 0x40000>;
-				interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
-				clocks = <&clkc CLKID_USB1_DDR_BRIDGE>;
-				clock-names = "ddr";
-				phys = <&usb2_phy1>;
-				dr_mode = "peripheral";
-				g-rx-fifo-size = <192>;
-				g-np-tx-fifo-size = <128>;
-				g-tx-fifo-size = <128 128 16 16 16>;
-			};
-
-			dwc3: usb@ff500000 {
-				compatible = "snps,dwc3";
-				reg = <0x0 0xff500000 0x0 0x100000>;
-				interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
-				dr_mode = "host";
-				snps,dis_u2_susphy_quirk;
-				snps,quirk-frame-length-adjustment;
-			};
-	};
diff --git a/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
new file mode 100644
index 000000000000..45bcc98ee9a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
@@ -0,0 +1,132 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 BayLibre, SAS
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/usb/amlogic,meson-g12a-usb-ctrl.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson G12A DWC3 USB SoC Controller Glue
+
+maintainers:
+  - Neil Armstrong <narmstrong@baylibre.com>
+
+description: |
+  The Amlogic G12A embeds a DWC3 USB IP Core configured for USB2 and USB3
+  in host-only mode, and a DWC2 IP Core configured for USB2 peripheral mode
+  only.
+
+  A glue connects the DWC3 core to USB2 PHYs and optionnaly to an USB3 PHY.
+
+  One of the USB2 PHY can be re-routed in peripheral mode to a DWC2 USB IP.
+
+  The DWC3 Glue controls the PHY routing and power, an interrupt line is
+  connected to the Glue to serve as OTG ID change detection.
+
+properties:
+  compatible:
+    enum:
+      - amlogic,meson-g12a-usb-ctrl
+
+  ranges: true
+
+  "#address-cells":
+    enum: [ 1, 2 ]
+
+  "#size-cells":
+    enum: [ 1, 2 ]
+
+  clocks:
+    minItems: 1
+
+  resets:
+    minItems: 1
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  phy-names:
+    items:
+      - const: usb2-phy0 # USB2 PHY0 if USBHOST_A port is used
+      - const: usb2-phy1 # USB2 PHY1 if USBOTG_B port is used
+      - const: usb3-phy0 # USB3 PHY if USB3_0 is used
+
+  phys:
+    minItems: 1
+    maxItems: 3
+
+  dr_mode:
+    enum:
+      - host # fixed Host connection
+      - peripheral # fixed Device connection
+      - otg # Host or Device and switched automatically using the OTG ID pin
+
+  power-domains:
+    maxItems: 1
+
+  vbus-supply:
+    description: VBUS power supply when used in OTG switchable mode
+    maxItems: 1
+
+patternProperties:
+  "^usb@[0-9a-f]+$":
+    type: object
+
+additionalProperties: false
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+  - clocks
+  - resets
+  - reg
+  - interrupts
+  - phy-names
+  - phys
+  - dr_mode
+
+examples:
+  - |
+    usb: usb@ffe09000 {
+          compatible = "amlogic,meson-g12a-usb-ctrl";
+          reg = <0x0 0xffe09000 0x0 0xa0>;
+          interrupts = <16>;
+          #address-cells = <1>;
+          #size-cells = <1>;
+          ranges;
+
+          clocks = <&clkc_usb>;
+          resets = <&reset_usb>;
+
+          dr_mode = "otg";
+
+          phys = <&usb2_phy0>, <&usb2_phy1>, <&usb3_phy0>;
+          phy-names = "usb2-phy0", "usb2-phy1", "usb3-phy0";
+
+          dwc2: usb@ff400000 {
+              compatible = "amlogic,meson-g12a-usb", "snps,dwc2";
+              reg = <0xff400000 0x40000>;
+              interrupts = <31>;
+              clocks = <&clkc_usb1>;
+              clock-names = "ddr";
+              phys = <&usb2_phy1>;
+              dr_mode = "peripheral";
+              g-rx-fifo-size = <192>;
+              g-np-tx-fifo-size = <128>;
+              g-tx-fifo-size = <128 128 16 16 16>;
+          };
+
+          dwc3: usb@ff500000 {
+              compatible = "snps,dwc3";
+              reg = <0xff500000 0x100000>;
+              interrupts = <30>;
+              dr_mode = "host";
+              snps,dis_u2_susphy_quirk;
+              snps,quirk-frame-length-adjustment;
+          };
+    };
+
-- 
2.22.0

Re: [PATCH] dt-bindings: usb: dwc3: Move Amlogic G12A DWC3 Glue Bindings to YAML schemas

[Felipe Balbi]

Hi,

Neil Armstrong <narmstrong@baylibre.com> writes:

> Now that we have the DT validation in place, let's convert the device tree
> bindings for the Amlogic G12A DWC3 Glue Bindings over to a YAML schemas,
> the AXG and GXL glue bindings will be converted later.
>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

Is this a thing now? Why do we need a new format?

-- 
balbi

Re: [PATCH] dt-bindings: usb: dwc3: Move Amlogic G12A DWC3 Glue Bindings to YAML schemas

[Martin Blumenstingl]

Hi Neil,

On Mon, Oct 21, 2019 at 3:23 PM Neil Armstrong <narmstrong@baylibre.com> wrote:
[...]
> diff --git a/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> new file mode 100644
> index 000000000000..45bcc98ee9a4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> @@ -0,0 +1,132 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2019 BayLibre, SAS
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/usb/amlogic,meson-g12a-usb-ctrl.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Amlogic Meson G12A DWC3 USB SoC Controller Glue
> +
> +maintainers:
> +  - Neil Armstrong <narmstrong@baylibre.com>
> +
> +description: |
> +  The Amlogic G12A embeds a DWC3 USB IP Core configured for USB2 and USB3
> +  in host-only mode, and a DWC2 IP Core configured for USB2 peripheral mode
> +  only.
> +
> +  A glue connects the DWC3 core to USB2 PHYs and optionnaly to an USB3 PHY.
optionnaly -> optionally

> +
> +  One of the USB2 PHY can be re-routed in peripheral mode to a DWC2 USB IP.
One of the USB2 PHYs...

with these two fixed:
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

[...]
> +  phy-names:
> +    items:
> +      - const: usb2-phy0 # USB2 PHY0 if USBHOST_A port is used
> +      - const: usb2-phy1 # USB2 PHY1 if USBOTG_B port is used
> +      - const: usb3-phy0 # USB3 PHY if USB3_0 is used
> +
> +  phys:
> +    minItems: 1
> +    maxItems: 3
(off-topic and probably a question for Rob: do you know the validation
mechanism knows that phys and phy-names belong together. so if one phy
is omitted then phy-names can be shorter than 3 entries?)


Martin

Re: [PATCH] dt-bindings: usb: dwc3: Move Amlogic G12A DWC3 Glue Bindings to YAML schemas

[Martin Blumenstingl]

Hi Felipe,

On Tue, Oct 22, 2019 at 9:39 AM Felipe Balbi
<felipe.balbi@linux.intel.com> wrote:
>
>
> Hi,
>
> Neil Armstrong <narmstrong@baylibre.com> writes:
>
> > Now that we have the DT validation in place, let's convert the device tree
> > bindings for the Amlogic G12A DWC3 Glue Bindings over to a YAML schemas,
> > the AXG and GXL glue bindings will be converted later.
> >
> > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>
> Is this a thing now? Why do we need a new format?
this is a 2019 thing now, see an initial announcement from Rob from a
year ago: [0]

the new yaml schemas allow validation of the actual .dts
this can be used for verifying that the example in the dt-bindings is
correct, as well as for verifying the actual .dts file (so they match
the actual dt-binding)
(Rob's old mail - linked above - still has these two on the TODO list,
nowadays this works fine)

Neil is working towards full yaml schema based validation for all IP
blocks used on Amlogic SoCs.
with this patch we get a bit closer to that goal


Martin


[0] https://lwn.net/Articles/767723/

Re: [PATCH] dt-bindings: usb: dwc3: Move Amlogic G12A DWC3 Glue Bindings to YAML schemas

[Felipe Balbi]

Hi,

Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes:
> Hi Felipe,
>
> On Tue, Oct 22, 2019 at 9:39 AM Felipe Balbi
> <felipe.balbi@linux.intel.com> wrote:
>>
>>
>> Hi,
>>
>> Neil Armstrong <narmstrong@baylibre.com> writes:
>>
>> > Now that we have the DT validation in place, let's convert the device tree
>> > bindings for the Amlogic G12A DWC3 Glue Bindings over to a YAML schemas,
>> > the AXG and GXL glue bindings will be converted later.
>> >
>> > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>>
>> Is this a thing now? Why do we need a new format?
> this is a 2019 thing now, see an initial announcement from Rob from a
> year ago: [0]
>
> the new yaml schemas allow validation of the actual .dts
> this can be used for verifying that the example in the dt-bindings is
> correct, as well as for verifying the actual .dts file (so they match
> the actual dt-binding)
> (Rob's old mail - linked above - still has these two on the TODO list,
> nowadays this works fine)
>
> Neil is working towards full yaml schema based validation for all IP
> blocks used on Amlogic SoCs.
> with this patch we get a bit closer to that goal

cool, thanks for the background :-)

-- 
balbi

Re: [PATCH] dt-bindings: usb: dwc3: Move Amlogic G12A DWC3 Glue Bindings to YAML schemas

[Rob Herring]

On Mon, Oct 21, 2019 at 03:23:22PM +0200, Neil Armstrong wrote:
> Now that we have the DT validation in place, let's convert the device tree
> bindings for the Amlogic G12A DWC3 Glue Bindings over to a YAML schemas,
> the AXG and GXL glue bindings will be converted later.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  .../devicetree/bindings/usb/amlogic,dwc3.txt  |  88 ------------
>  .../usb/amlogic,meson-g12a-usb-ctrl.yaml      | 132 ++++++++++++++++++
>  2 files changed, 132 insertions(+), 88 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> 
> diff --git a/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
> index b9f04e617eb7..9a8b631904fd 100644
> --- a/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
> +++ b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
> @@ -40,91 +40,3 @@ Example device nodes:
>  				phy-names = "usb2-phy", "usb3-phy";
>  			};
>  		};
> -
> -Amlogic Meson G12A DWC3 USB SoC Controller Glue
> -
> -The Amlogic G12A embeds a DWC3 USB IP Core configured for USB2 and USB3
> -in host-only mode, and a DWC2 IP Core configured for USB2 peripheral mode
> -only.
> -
> -A glue connects the DWC3 core to USB2 PHYs and optionnaly to an USB3 PHY.
> -
> -One of the USB2 PHY can be re-routed in peripheral mode to a DWC2 USB IP.
> -
> -The DWC3 Glue controls the PHY routing and power, an interrupt line is
> -connected to the Glue to serve as OTG ID change detection.
> -
> -Required properties:
> -- compatible:	Should be "amlogic,meson-g12a-usb-ctrl"
> -- clocks:	a handle for the "USB" clock
> -- resets:	a handle for the shared "USB" reset line
> -- reg:		The base address and length of the registers
> -- interrupts:	the interrupt specifier for the OTG detection
> -- phys: 	handle to used PHYs on the system
> -	- a <0> phandle can be used if a PHY is not used
> -- phy-names:	names of the used PHYs on the system :
> -	- "usb2-phy0" for USB2 PHY0 if USBHOST_A port is used
> -	- "usb2-phy1" for USB2 PHY1 if USBOTG_B port is used
> -	- "usb3-phy0" for USB3 PHY if USB3_0 is used
> -- dr_mode:	should be "host", "peripheral", or "otg" depending on
> -	the usage and configuration of the OTG Capable port.
> -	- "host" and "peripheral" means a fixed Host or Device only connection
> -	- "otg" means the port can be used as both Host or Device and
> -	  be switched automatically using the OTG ID pin.
> -
> -Optional properties:
> -- vbus-supply:	should be a phandle to the regulator controlling the VBUS
> -		power supply when used in OTG switchable mode
> -
> -Required child nodes:
> -
> -A child node must exist to represent the core DWC3 IP block. The name of
> -the node is not important. The content of the node is defined in dwc3.txt.
> -
> -A child node must exist to represent the core DWC2 IP block. The name of
> -the node is not important. The content of the node is defined in dwc2.txt.
> -
> -PHY documentation is provided in the following places:
> -- Documentation/devicetree/bindings/phy/meson-g12a-usb2-phy.txt
> -- Documentation/devicetree/bindings/phy/meson-g12a-usb3-pcie-phy.txt
> -
> -Example device nodes:
> -	usb: usb@ffe09000 {
> -			compatible = "amlogic,meson-g12a-usb-ctrl";
> -			reg = <0x0 0xffe09000 0x0 0xa0>;
> -			interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
> -			#address-cells = <2>;
> -			#size-cells = <2>;
> -			ranges;
> -
> -			clocks = <&clkc CLKID_USB>;
> -			resets = <&reset RESET_USB>;
> -
> -			dr_mode = "otg";
> -
> -			phys = <&usb2_phy0>, <&usb2_phy1>,
> -			       <&usb3_pcie_phy PHY_TYPE_USB3>;
> -			phy-names = "usb2-phy0", "usb2-phy1", "usb3-phy0";
> -
> -			dwc2: usb@ff400000 {
> -				compatible = "amlogic,meson-g12a-usb", "snps,dwc2";
> -				reg = <0x0 0xff400000 0x0 0x40000>;
> -				interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
> -				clocks = <&clkc CLKID_USB1_DDR_BRIDGE>;
> -				clock-names = "ddr";
> -				phys = <&usb2_phy1>;
> -				dr_mode = "peripheral";
> -				g-rx-fifo-size = <192>;
> -				g-np-tx-fifo-size = <128>;
> -				g-tx-fifo-size = <128 128 16 16 16>;
> -			};
> -
> -			dwc3: usb@ff500000 {
> -				compatible = "snps,dwc3";
> -				reg = <0x0 0xff500000 0x0 0x100000>;
> -				interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
> -				dr_mode = "host";
> -				snps,dis_u2_susphy_quirk;
> -				snps,quirk-frame-length-adjustment;
> -			};
> -	};
> diff --git a/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> new file mode 100644
> index 000000000000..45bcc98ee9a4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> @@ -0,0 +1,132 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2019 BayLibre, SAS
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/usb/amlogic,meson-g12a-usb-ctrl.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Amlogic Meson G12A DWC3 USB SoC Controller Glue
> +
> +maintainers:
> +  - Neil Armstrong <narmstrong@baylibre.com>
> +
> +description: |
> +  The Amlogic G12A embeds a DWC3 USB IP Core configured for USB2 and USB3
> +  in host-only mode, and a DWC2 IP Core configured for USB2 peripheral mode
> +  only.
> +
> +  A glue connects the DWC3 core to USB2 PHYs and optionnaly to an USB3 PHY.
> +
> +  One of the USB2 PHY can be re-routed in peripheral mode to a DWC2 USB IP.
> +
> +  The DWC3 Glue controls the PHY routing and power, an interrupt line is
> +  connected to the Glue to serve as OTG ID change detection.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - amlogic,meson-g12a-usb-ctrl
> +
> +  ranges: true
> +
> +  "#address-cells":
> +    enum: [ 1, 2 ]
> +
> +  "#size-cells":
> +    enum: [ 1, 2 ]
> +
> +  clocks:
> +    minItems: 1
> +
> +  resets:
> +    minItems: 1
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  phy-names:
> +    items:
> +      - const: usb2-phy0 # USB2 PHY0 if USBHOST_A port is used
> +      - const: usb2-phy1 # USB2 PHY1 if USBOTG_B port is used
> +      - const: usb3-phy0 # USB3 PHY if USB3_0 is used
> +
> +  phys:
> +    minItems: 1
> +    maxItems: 3
> +
> +  dr_mode:
> +    enum:
> +      - host # fixed Host connection
> +      - peripheral # fixed Device connection
> +      - otg # Host or Device and switched automatically using the OTG ID pin

This should have a common definition. You can assume it does, so you 
just need 'true'.

> +
> +  power-domains:
> +    maxItems: 1
> +
> +  vbus-supply:
> +    description: VBUS power supply when used in OTG switchable mode
> +    maxItems: 1
> +
> +patternProperties:
> +  "^usb@[0-9a-f]+$":
> +    type: object
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - "#address-cells"
> +  - "#size-cells"
> +  - ranges
> +  - clocks
> +  - resets
> +  - reg
> +  - interrupts
> +  - phy-names
> +  - phys
> +  - dr_mode
> +
> +examples:
> +  - |
> +    usb: usb@ffe09000 {
> +          compatible = "amlogic,meson-g12a-usb-ctrl";
> +          reg = <0x0 0xffe09000 0x0 0xa0>;
> +          interrupts = <16>;
> +          #address-cells = <1>;
> +          #size-cells = <1>;
> +          ranges;
> +
> +          clocks = <&clkc_usb>;
> +          resets = <&reset_usb>;
> +
> +          dr_mode = "otg";
> +
> +          phys = <&usb2_phy0>, <&usb2_phy1>, <&usb3_phy0>;
> +          phy-names = "usb2-phy0", "usb2-phy1", "usb3-phy0";
> +
> +          dwc2: usb@ff400000 {
> +              compatible = "amlogic,meson-g12a-usb", "snps,dwc2";
> +              reg = <0xff400000 0x40000>;
> +              interrupts = <31>;
> +              clocks = <&clkc_usb1>;
> +              clock-names = "ddr";
> +              phys = <&usb2_phy1>;
> +              dr_mode = "peripheral";

However, it seems folks just put 'dr_mode' where ever they please. I saw 
one in usb phy yesterday. Just a comment, not really anything for you to 
change here...

> +              g-rx-fifo-size = <192>;
> +              g-np-tx-fifo-size = <128>;
> +              g-tx-fifo-size = <128 128 16 16 16>;
> +          };
> +
> +          dwc3: usb@ff500000 {
> +              compatible = "snps,dwc3";
> +              reg = <0xff500000 0x100000>;
> +              interrupts = <30>;
> +              dr_mode = "host";
> +              snps,dis_u2_susphy_quirk;
> +              snps,quirk-frame-length-adjustment;
> +          };
> +    };
> +
> -- 
> 2.22.0
>