mbox series

[v2,0/3] Add JH7110 USB driver support

Message ID 20230308082800.3008-1-minda.chen@starfivetech.com
Headers show
Series Add JH7110 USB driver support | expand

Message

Minda Chen March 8, 2023, 8:27 a.m. UTC
This patchset adds USB driver for the StarFive JH7110 SoC.
USB work mode is peripheral and using USB 2.0 PHY in VisionFive 2 board.
The patch has been tested on the VisionFive 2 board.

This patchset should be applied after the patchset [1] and patch [2]:
[1] https://lore.kernel.org/all/20230221083323.302471-1-xingyu.wu@starfivetech.com/
[2] https://lore.kernel.org/all/20230215113249.47727-4-william.qiu@starfivetech.com/

This patchset is base on v6.3-rc1

patch 1 is usb phy dt-binding document.
patch 2 is the glue layer of Cadence USB3 and USB phy setting. USB controller IP is Cadence USB3.
patch 3 is USB device tree configuration.

previous version
---
v1: https://patchwork.kernel.org/project/linux-usb/patch/20230306095339.26006-1-minda.chen@starfivetech.com/

changes
v2
  1. (patch 1) dt-binding check test pass and no warning. The document example is the same as dts config.
  2. (patch 2) using dev_err_probe and syscon_regmap_lookup_by_phandle_args function. Some formats changes
  3. (patch 3) dts nodes sorted by the address after @

Minda Chen (3):
  dt-bindings: phy: Add StarFive JH7110 USB dt-binding
  usb: cdns3: add StarFive JH7110 USB glue layer
  dts: usb: add StarFive JH7110 USB dts configuration.

 .../bindings/phy/starfive,jh7110-usb-phy.yaml | 158 ++++++++
 MAINTAINERS                                   |   7 +
 .../jh7110-starfive-visionfive-2.dtsi         |   6 +
 arch/riscv/boot/dts/starfive/jh7110.dtsi      |  38 ++
 drivers/usb/cdns3/Kconfig                     |  11 +
 drivers/usb/cdns3/Makefile                    |   1 +
 drivers/usb/cdns3/cdns3-starfive.c            | 374 ++++++++++++++++++
 7 files changed, 595 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
 create mode 100644 drivers/usb/cdns3/cdns3-starfive.c


base-commit: 8ca09d5fa3549d142c2080a72a4c70ce389163cd
prerequisite-patch-id: 0e6d1df3ba9aecd925a0c604b9d91f7143be88ca
prerequisite-patch-id: ac150a8c622e858e088df8121093d448df49c245
prerequisite-patch-id: 044263ef2fb9f1e5a586edbf85d5f67814a28430
prerequisite-patch-id: 74390c129b92fb35a7088e2e5c869632c4cb3d06
prerequisite-patch-id: de93ebec041625e940f195403069b46ec17fc99c
prerequisite-patch-id: 1b2d0982b18da060c82134f05bf3ce16425bac8d
prerequisite-patch-id: 090ba4b78d47bc19204916e76fdbc70021785388
prerequisite-patch-id: a5d9e0f7d4f8163f566678894cf693015119f2d9
prerequisite-patch-id: f01a78c30f6f1970b4db7758c339bd4e5c882b16
prerequisite-patch-id: 417736eb958e1158c60a5ed74bc2350394321a80
prerequisite-patch-id: ff9fe0b043a5f7f74a1f6af5cebc4793c6f14ce7
prerequisite-patch-id: 290602062703e666191c20ca02f2840471a6bf4f
prerequisite-patch-id: f0b29adbb18edffbfeec7292c5f33e2bbeb30945
prerequisite-patch-id: 258ea5f9b8bf41b6981345dcc81795f25865d38f
prerequisite-patch-id: 8b6f2c9660c0ac0ee4e73e4c21aca8e6b75e81b9
prerequisite-patch-id: dbb0c0151b8bdf093e6ce79fd2fe3f60791a6e0b
prerequisite-patch-id: ea9a6d0313dd3936c8de0239dc2072c3360a2f6b
prerequisite-patch-id: d57e95d31686772abc4c4d5aa1cadc344dc293cd
prerequisite-patch-id: 27197d69922ad1f33a193dfe0a8cc2b27d67982d
prerequisite-patch-id: f9ce88e490c2473c3c94ad63fa26bc91829ce2cc
prerequisite-patch-id: 7acbc9c924e802712d3574dd74a6b3576089f78c
prerequisite-patch-id: b9b8fda5e8cd2dd4c9101ec03f4c8fb8e8caa573
prerequisite-patch-id: 63a6de4511f1a7ae974551e7097af9bb91db1b0d
prerequisite-patch-id: aaff99c0bdd1604048d0713b44084ad4604816e1

Comments

Rob Herring March 8, 2023, 2:06 p.m. UTC | #1
On Wed, 08 Mar 2023 16:27:58 +0800, Minda Chen wrote:
> Add StarFive JH7110 SoC USB 3.0 phy dt-binding.
> USB controller is cadence USB 3.0 IP.
> 
> Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
> ---
>  .../bindings/phy/starfive,jh7110-usb-phy.yaml | 158 ++++++++++++++++++
>  1 file changed, 158 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.example.dtb: usb@10100000: phy-names:1: 'anyOf' conditional failed, one must be fixed:
	'cdns3,usb2-phy' was expected
	'cdns3,usb3-phy' was expected
	From schema: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.example.dtb: usb@10100000: 'phys' is a dependency of 'phy-names'
	From schema: /usr/local/lib/python3.10/dist-packages/dtschema/schemas/phy/phy-consumer.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20230308082800.3008-2-minda.chen@starfivetech.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.
Rob Herring March 8, 2023, 6:12 p.m. UTC | #2
On Wed, Mar 08, 2023 at 04:27:58PM +0800, Minda Chen wrote:
> Add StarFive JH7110 SoC USB 3.0 phy dt-binding.
> USB controller is cadence USB 3.0 IP.
> 
> Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
> ---
>  .../bindings/phy/starfive,jh7110-usb-phy.yaml | 158 ++++++++++++++++++
>  1 file changed, 158 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
> new file mode 100644
> index 000000000000..daa88d065deb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml

Filename should match the compatible. The filename seems more correct 
than the compatible...

> @@ -0,0 +1,158 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/starfive,jh7110-usb-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive USB 2.0 and 3.0 PHY
> +
> +maintainers:
> +  - Minda Chen<minda.chen@starfivetech.com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: starfive,jh7110-usb

What's the USB controller called?

> +
> +  reg:
> +    maxItems: 2
> +
> +  reg-names:
> +    items:
> +      - const: usb3
> +      - const: usb2
> +
> +  clocks:
> +    items:
> +      - description: usb 125m clock
> +      - description: app 125m clock
> +      - description: lpm clock
> +      - description: stb clock
> +      - description: apb clock
> +      - description: axi clock
> +      - description: utmi apb clock
> +
> +  clock-names:
> +    items:
> +      - const: usb_125m
> +      - const: usb0_app_125
> +      - const: usb0_lpm
> +      - const: usb0_stb
> +      - const: usb0_apb
> +      - const: usb0_axi
> +      - const: usb0_utmi_apb

usb_ and usb0_ is redundant, drop.

> +
> +  resets:
> +    items:
> +      - description: USB0_PWRUP reset
> +      - description: USB0_APB reset
> +      - description: USB0_AXI reset
> +      - description: USB0_UTMI_APB reset
> +
> +  starfive,sys-syscon:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    items:
> +      items:

Are there multiple entries of phandle+offset because this says there 
are. You want '- items:' here to limit it to 1 phandle+offset.

> +        - description: phandle to System Register Controller sys_syscon node.
> +        - description: offset of SYS_SYSCONSAIF__SYSCFG register for USB.
> +    description:
> +      The phandle to System Register Controller syscon node and the offset
> +      of SYS_SYSCONSAIF__SYSCFG register for USB.
> +
> +  starfive,stg-syscon:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    items:
> +      items:

Same here.

> +        - description: phandle to System Register Controller stg_syscon node.
> +        - description: register0 offset of STG_SYSCONSAIF__SYSCFG register for USB.
> +        - description: register1 offset of STG_SYSCONSAIF__SYSCFG register for USB.
> +        - description: register2 offset of STG_SYSCONSAIF__SYSCFG register for USB.
> +        - description: register3 offset of STG_SYSCONSAIF__SYSCFG register for USB.
> +    description:
> +      The phandle to System Register Controller syscon node and the offset
> +      of STG_SYSCONSAIF__SYSCFG register for USB. Total 4 regsisters offset
> +      for USB.
> +
> +  dr_mode:

Usually this belongs in the controller node.

> +    description: PHY mode.
> +    enum:
> +      - host
> +      - peripheral
> +      - otg
> +
> +  "#address-cells":
> +    maximum: 2
> +
> +  "#size-cells":
> +    maximum: 2
> +
> +  ranges: true
> +
> +  starfive,usb2-only:
> +    type: boolean
> +    description: Set USB using usb 2.0 phy. Supprt USB 2.0 only

The 'maximum-speed' property in the controller should be enough. Why is 
this needed.

Being a PHY, you are missing #phy-cells.

> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - clocks
> +  - clock-names
> +  - resets
> +  - starfive,sys-syscon
> +  - starfive,stg-syscon
> +  - dr_mode
> +  - "#address-cells"
> +  - "#size-cells"
> +  - ranges
> +
> +patternProperties:
> +  "^usb@[0-9a-f]+$":
> +    type: object
> +    description: |
> +      usbphy node should have '1' usb controller subnode.
> +      It could be Cadence USB3 DRD controller.
> +      Cadence USB3 should follow the bindings specified in
> +      Documentation/devicetree/bindings/usb/cdns,usb3.yaml

Why is the controller a child of the phy?

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    usbphy@10200000 {
> +      compatible = "starfive,jh7110-usb";
> +      reg = <0x10210000 0x1000>,
> +            <0x10200000 0x1000>;
> +      reg-names = "usb3", "usb2";
> +      clocks = <&syscrg 95>,
> +               <&stgcrg 6>,
> +               <&stgcrg 4>,
> +               <&stgcrg 5>,
> +               <&stgcrg 1>,
> +               <&stgcrg 3>,
> +               <&stgcrg 2>;
> +      clock-names = "usb_125m", "usb0_app_125", "usb0_lpm",
> +                    "usb0_stb", "usb0_apb", "usb0_axi", "usb0_utmi_apb";
> +      resets = <&stgcrg 10>,
> +               <&stgcrg 8>,
> +               <&stgcrg 7>,
> +               <&stgcrg 9>;
> +      starfive,stg-syscon = <&stg_syscon 0x4 0xc4 0x148 0x1f4>;
> +      starfive,sys-syscon = <&sys_syscon 0x18>;
> +      dr_mode = "host";
> +      #address-cells = <1>;
> +      #size-cells = <1>;
> +      ranges;
> +
> +      usb@10100000 {
> +        compatible = "cdns,usb3";

This needs a platform specific compatible.

> +        reg = <0x10100000 0x10000>,
> +              <0x10110000 0x10000>,
> +              <0x10120000 0x10000>;
> +        reg-names = "otg", "xhci", "dev";
> +        interrupts = <100>, <108>, <110>;
> +        interrupt-names = "host", "peripheral", "otg";
> +        phy-names = "cdns3,usb3-phy", "cnds3,usb2-phy";
> +        maximum-speed = "super-speed";
> +      };
> +    };
> -- 
> 2.17.1
>
Minda Chen March 9, 2023, 3:45 a.m. UTC | #3
On 2023/3/8 22:06, Rob Herring wrote:
> 
> On Wed, 08 Mar 2023 16:27:58 +0800, Minda Chen wrote:
>> Add StarFive JH7110 SoC USB 3.0 phy dt-binding.
>> USB controller is cadence USB 3.0 IP.
>> 
>> Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
>> ---
>>  .../bindings/phy/starfive,jh7110-usb-phy.yaml | 158 ++++++++++++++++++
>>  1 file changed, 158 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
>> 
> 
> My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
> on your patch (DT_CHECKER_FLAGS is new in v5.13):
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.example.dtb: usb@10100000: phy-names:1: 'anyOf' conditional failed, one must be fixed:
> 	'cdns3,usb2-phy' was expected
> 	'cdns3,usb3-phy' was expected
> 	From schema: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.example.dtb: usb@10100000: 'phys' is a dependency of 'phy-names'
> 	From schema: /usr/local/lib/python3.10/dist-packages/dtschema/schemas/phy/phy-consumer.yaml
> 
> doc reference errors (make refcheckdocs):
> 
> See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20230308082800.3008-2-minda.chen@starfivetech.com
> 
> The base for the series is generally the latest rc1. A different dependency
> should be noted in *this* patch.
> 
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:
> 
> pip3 install dtschema --upgrade
> 
> Please check and re-submit after running the above command yourself. Note
> that DT_SCHEMA_FILES can be set to your schema file to speed up checking
> your schema. However, it must be unset to test all examples with your schema.
> 
I am sorry about this, I just run dtbs_check, not dt_binding_check. Next version I will fix it.
Minda Chen March 9, 2023, 4:10 a.m. UTC | #4
On 2023/3/9 2:12, Rob Herring wrote:
> On Wed, Mar 08, 2023 at 04:27:58PM +0800, Minda Chen wrote:
>> Add StarFive JH7110 SoC USB 3.0 phy dt-binding.
>> USB controller is cadence USB 3.0 IP.
>> 
>> Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
>> ---
>>  .../bindings/phy/starfive,jh7110-usb-phy.yaml | 158 ++++++++++++++++++
>>  1 file changed, 158 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
>> 
>> diff --git a/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
>> new file mode 100644
>> index 000000000000..daa88d065deb
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
> 
> Filename should match the compatible. The filename seems more correct 
> than the compatible...
> 
[1] jh7110 USB dts configure is similar to  Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
But we have PHY (10200000). So I will add  Documentation/devicetree/bindings/usb/starfive,jh7110-usb.yaml
as a wrap level.
starfive,jh7110-usb-phy.yaml contains only phy setting.
>> @@ -0,0 +1,158 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/phy/starfive,jh7110-usb-phy.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: StarFive USB 2.0 and 3.0 PHY
>> +
>> +maintainers:
>> +  - Minda Chen<minda.chen@starfivetech.com>
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - const: starfive,jh7110-usb
> 
> What's the USB controller called?
> 
I will change to "starfive,jh7110-usb-phy"
>> +
>> +  reg:
>> +    maxItems: 2
>> +
>> +  reg-names:
>> +    items:
>> +      - const: usb3
>> +      - const: usb2
>> +
>> +  clocks:
>> +    items:
>> +      - description: usb 125m clock
>> +      - description: app 125m clock
>> +      - description: lpm clock
>> +      - description: stb clock
>> +      - description: apb clock
>> +      - description: axi clock
>> +      - description: utmi apb clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: usb_125m
>> +      - const: usb0_app_125
>> +      - const: usb0_lpm
>> +      - const: usb0_stb
>> +      - const: usb0_apb
>> +      - const: usb0_axi
>> +      - const: usb0_utmi_apb
> 
> usb_ and usb0_ is redundant, drop.
> 
ok
>> +
>> +  resets:
>> +    items:
>> +      - description: USB0_PWRUP reset
>> +      - description: USB0_APB reset
>> +      - description: USB0_AXI reset
>> +      - description: USB0_UTMI_APB reset
>> +
>> +  starfive,sys-syscon:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>> +    items:
>> +      items:
> 
ok
> Are there multiple entries of phandle+offset because this says there 
> are. You want '- items:' here to limit it to 1 phandle+offset.
> 
>> +        - description: phandle to System Register Controller sys_syscon node.
>> +        - description: offset of SYS_SYSCONSAIF__SYSCFG register for USB.
>> +    description:
>> +      The phandle to System Register Controller syscon node and the offset
>> +      of SYS_SYSCONSAIF__SYSCFG register for USB.
>> +
>> +  starfive,stg-syscon:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>> +    items:
>> +      items:
> 
> Same here.
> 
ok
>> +        - description: phandle to System Register Controller stg_syscon node.
>> +        - description: register0 offset of STG_SYSCONSAIF__SYSCFG register for USB.
>> +        - description: register1 offset of STG_SYSCONSAIF__SYSCFG register for USB.
>> +        - description: register2 offset of STG_SYSCONSAIF__SYSCFG register for USB.
>> +        - description: register3 offset of STG_SYSCONSAIF__SYSCFG register for USB.
>> +    description:
>> +      The phandle to System Register Controller syscon node and the offset
>> +      of STG_SYSCONSAIF__SYSCFG register for USB. Total 4 regsisters offset
>> +      for USB.
>> +
>> +  dr_mode:
> 
> Usually this belongs in the controller node.
> 
cdns3 usb controller IP default set to host mode. If cdns3 usb controller "dr_mode"
set to "peripheral", cdns3 controller can't be registered.

in driver/usb/cdns3/core.c
132         } else if (cdns->dr_mode != dr_mode) {
133                 dev_err(dev, "Incorrect DRD configuration\n");
134                 return -EINVAL;
135         }


If dr_mode is not set in int wrap level, peripheral mode can not be work.

And I see other USB PHY contain dr-mode setting.
>> +    description: PHY mode.
>> +    enum:
>> +      - host
>> +      - peripheral
>> +      - otg
>> +
>> +  "#address-cells":
>> +    maximum: 2
>> +
>> +  "#size-cells":
>> +    maximum: 2
>> +
>> +  ranges: true
>> +
>> +  starfive,usb2-only:
>> +    type: boolean
>> +    description: Set USB using usb 2.0 phy. Supprt USB 2.0 only
> 
> The 'maximum-speed' property in the controller should be enough. Why is 
> this needed.
> 
maybe I can delete this setting.
> Being a PHY, you are missing #phy-cells.
> 
ok
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - reg-names
>> +  - clocks
>> +  - clock-names
>> +  - resets
>> +  - starfive,sys-syscon
>> +  - starfive,stg-syscon
>> +  - dr_mode
>> +  - "#address-cells"
>> +  - "#size-cells"
>> +  - ranges
>> +
>> +patternProperties:
>> +  "^usb@[0-9a-f]+$":
>> +    type: object
>> +    description: |
>> +      usbphy node should have '1' usb controller subnode.
>> +      It could be Cadence USB3 DRD controller.
>> +      Cadence USB3 should follow the bindings specified in
>> +      Documentation/devicetree/bindings/usb/cdns,usb3.yaml
> 
> Why is the controller a child of the phy?
> 
same as [1]. I will change this .
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    usbphy@10200000 {
>> +      compatible = "starfive,jh7110-usb";
>> +      reg = <0x10210000 0x1000>,
>> +            <0x10200000 0x1000>;
>> +      reg-names = "usb3", "usb2";
>> +      clocks = <&syscrg 95>,
>> +               <&stgcrg 6>,
>> +               <&stgcrg 4>,
>> +               <&stgcrg 5>,
>> +               <&stgcrg 1>,
>> +               <&stgcrg 3>,
>> +               <&stgcrg 2>;
>> +      clock-names = "usb_125m", "usb0_app_125", "usb0_lpm",
>> +                    "usb0_stb", "usb0_apb", "usb0_axi", "usb0_utmi_apb";
>> +      resets = <&stgcrg 10>,
>> +               <&stgcrg 8>,
>> +               <&stgcrg 7>,
>> +               <&stgcrg 9>;
>> +      starfive,stg-syscon = <&stg_syscon 0x4 0xc4 0x148 0x1f4>;
>> +      starfive,sys-syscon = <&sys_syscon 0x18>;
>> +      dr_mode = "host";
>> +      #address-cells = <1>;
>> +      #size-cells = <1>;
>> +      ranges;
>> +
>> +      usb@10100000 {
>> +        compatible = "cdns,usb3";
> 
> This needs a platform specific compatible.
> 
same as [1]
>> +        reg = <0x10100000 0x10000>,
>> +              <0x10110000 0x10000>,
>> +              <0x10120000 0x10000>;
>> +        reg-names = "otg", "xhci", "dev";
>> +        interrupts = <100>, <108>, <110>;
>> +        interrupt-names = "host", "peripheral", "otg";
>> +        phy-names = "cdns3,usb3-phy", "cnds3,usb2-phy";
>> +        maximum-speed = "super-speed";
>> +      };
>> +    };
>> -- 
>> 2.17.1
>>