[PATCH v5 02/19] dt-bindings: usb: Convert generic USB properties to DT schemas
Chunfeng Yun
chunfeng.yun at mediatek.com
Mon Dec 7 02:37:28 EST 2020
On Sat, 2020-12-05 at 18:24 +0300, Serge Semin wrote:
> The generic USB properties have been described in the legacy bindings
> text file: Documentation/devicetree/bindings/usb/generic.txt . Let's
> convert its content into the generic USB, USB HCD and USB DRD DT
> schemas. So the Generic USB schema will be applicable to all USB
> controllers, USB HCD - for the generic USB Host controllers and the USB
> DRD - for the USB Dual-role controllers.
>
> Note the USB DRD schema is supposed to work in conjunction with
> the USB peripheral/gadget and USB host controllers DT schemas.
>
> Signed-off-by: Serge Semin <Sergey.Semin at baikalelectronics.ru>
> Reviewed-by: Rob Herring <robh at kernel.org>
>
> ---
>
> Changelog v2:
> - Discard '|' in all the new properties, since we don't need to preserve
> the text formatting.
> - Convert abbreviated form of the "maximum-speed" enum restriction into
> the multi-lined version of the list.
> - Drop quotes from around the string constants.
>
> Changelog v4:
> - Redistribute the properties between generic ones, USB HCD-specific and
> USB DRD-specific.
> - Discard the Rob'es Reviewed-by tag. Please review the patch one more time.
> ---
> .../devicetree/bindings/usb/generic.txt | 57 --------------
> .../devicetree/bindings/usb/usb-drd.yaml | 77 +++++++++++++++++++
> .../devicetree/bindings/usb/usb-hcd.yaml | 5 ++
> .../devicetree/bindings/usb/usb.yaml | 22 ++++++
> 4 files changed, 104 insertions(+), 57 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/usb/generic.txt
> create mode 100644 Documentation/devicetree/bindings/usb/usb-drd.yaml
>
> diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt
> deleted file mode 100644
> index ba472e7aefc9..000000000000
> --- a/Documentation/devicetree/bindings/usb/generic.txt
> +++ /dev/null
> @@ -1,57 +0,0 @@
> -Generic USB Properties
> -
> -Optional properties:
> - - maximum-speed: tells USB controllers we want to work up to a certain
> - speed. Valid arguments are "super-speed-plus",
> - "super-speed", "high-speed", "full-speed" and
> - "low-speed". In case this isn't passed via DT, USB
> - controllers should default to their maximum HW
> - capability.
> - - dr_mode: tells Dual-Role USB controllers that we want to work on a
> - particular mode. Valid arguments are "host",
> - "peripheral" and "otg". In case this attribute isn't
> - passed via DT, USB DRD controllers should default to
> - OTG.
> - - phy_type: tells USB controllers that we want to configure the core to support
> - a UTMI+ PHY with an 8- or 16-bit interface if UTMI+ is
> - selected. Valid arguments are "utmi" and "utmi_wide".
> - In case this isn't passed via DT, USB controllers should
> - default to HW capability.
> - - otg-rev: tells usb driver the release number of the OTG and EH supplement
> - with which the device and its descriptors are compliant,
> - in binary-coded decimal (i.e. 2.0 is 0200H). This
> - property is used if any real OTG features(HNP/SRP/ADP)
> - is enabled, if ADP is required, otg-rev should be
> - 0x0200 or above.
> - - companion: phandle of a companion
> - - hnp-disable: tells OTG controllers we want to disable OTG HNP, normally HNP
> - is the basic function of real OTG except you want it
> - to be a srp-capable only B device.
> - - srp-disable: tells OTG controllers we want to disable OTG SRP, SRP is
> - optional for OTG device.
> - - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is
> - optional for OTG device.
> - - usb-role-switch: boolean, indicates that the device is capable of assigning
> - the USB data role (USB host or USB device) for a given
> - USB connector, such as Type-C, Type-B(micro).
> - see connector/usb-connector.yaml.
> - - role-switch-default-mode: indicating if usb-role-switch is enabled, the
> - device default operation mode of controller while usb
> - role is USB_ROLE_NONE. Valid arguments are "host" and
> - "peripheral". Defaults to "peripheral" if not
> - specified.
> -
> -
> -This is an attribute to a USB controller such as:
> -
> -dwc3 at 4a030000 {
> - compatible = "synopsys,dwc3";
> - reg = <0x4a030000 0xcfff>;
> - interrupts = <0 92 4>
> - usb-phy = <&usb2_phy>, <&usb3,phy>;
> - maximum-speed = "super-speed";
> - dr_mode = "otg";
> - phy_type = "utmi_wide";
> - otg-rev = <0x0200>;
> - adp-disable;
> -};
> diff --git a/Documentation/devicetree/bindings/usb/usb-drd.yaml b/Documentation/devicetree/bindings/usb/usb-drd.yaml
> new file mode 100644
> index 000000000000..f3a64c46dcd0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/usb-drd.yaml
> @@ -0,0 +1,77 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/usb-drd.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Generic USB OTG Controller Device Tree Bindings
> +
> +maintainers:
> + - Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> +
> +properties:
> + otg-rev:
> + description:
> + Tells usb driver the release number of the OTG and EH supplement with
> + which the device and its descriptors are compliant, in binary-coded
> + decimal (i.e. 2.0 is 0200H). This property is used if any real OTG
> + features (HNP/SRP/ADP) is enabled. If ADP is required, otg-rev should be
> + 0x0200 or above.
> + $ref: /schemas/types.yaml#/definitions/uint32
> +
> + dr_mode:
> + description:
> + Tells Dual-Role USB controllers that we want to work on a particular
> + mode. In case this attribute isn't passed via DT, USB DRD controllers
> + should default to OTG.
> + $ref: /schemas/types.yaml#/definitions/string
> + enum: [host, peripheral, otg]
> +
> + hnp-disable:
> + description:
> + Tells OTG controllers we want to disable OTG HNP. Normally HNP is the
> + basic function of real OTG except you want it to be a srp-capable only B
> + device.
> + type: boolean
> +
> + srp-disable:
> + description:
> + Tells OTG controllers we want to disable OTG SRP. SRP is optional for OTG
> + device.
> + type: boolean
> +
> + adp-disable:
> + description:
> + Tells OTG controllers we want to disable OTG ADP. ADP is optional for OTG
> + device.
> + type: boolean
> +
> + usb-role-switch:
> + description:
> + Indicates that the device is capable of assigning the USB data role
> + (USB host or USB device) for a given USB connector, such as Type-C,
> + Type-B(micro). See connector/usb-connector.yaml.
> +
> + role-switch-default-mode:
> + description:
> + Indicates if usb-role-switch is enabled, the device default operation
> + mode of controller while usb role is USB_ROLE_NONE.
> + $ref: /schemas/types.yaml#/definitions/string
> + enum: [host, peripheral]
> + default: peripheral
> +
> +additionalProperties: true
> +
> +examples:
> + - |
> + usb at 4a030000 {
> + compatible = "snps,dwc3";
> + reg = <0x4a030000 0xcfff>;
> + interrupts = <0 92 4>;
> + usb-phy = <&usb2_phy>, <&usb3_phy>;
> + maximum-speed = "super-speed";
> + dr_mode = "otg";
> + phy_type = "utmi_wide";
> + otg-rev = <0x0200>;
> + adp-disable;
> + };
> diff --git a/Documentation/devicetree/bindings/usb/usb-hcd.yaml b/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> index 81f3ad1419d8..52cc84c400c0 100644
> --- a/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> +++ b/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> @@ -12,6 +12,11 @@ maintainers:
> allOf:
> - $ref: usb.yaml#
>
> +properties:
> + companion:
> + description: Phandle of a companion device
> + $ref: /schemas/types.yaml#/definitions/phandle
> +
> additionalProperties: true
>
> examples:
> diff --git a/Documentation/devicetree/bindings/usb/usb.yaml b/Documentation/devicetree/bindings/usb/usb.yaml
> index 941ad59fbac5..991c02725e2b 100644
> --- a/Documentation/devicetree/bindings/usb/usb.yaml
> +++ b/Documentation/devicetree/bindings/usb/usb.yaml
> @@ -24,6 +24,28 @@ properties:
> description:
> Name specifier for the USB PHY
>
> + phy_type:
> + description:
> + Tells USB controllers that we want to configure the core to support a
> + UTMI+ PHY with an 8- or 16-bit interface if UTMI+ is selected. In case
> + this isn't passed via DT, USB controllers should default to HW
> + capability.
> + $ref: /schemas/types.yaml#/definitions/string
> + enum: [utmi, utmi_wide]
> +
> + maximum-speed:
> + description:
indent: two blank space, like v4
> + Tells USB controllers we want to work up to a certain speed. In case this
> + isn't passed via DT, USB controllers should default to their maximum HW
> + capability.
> + $ref: /schemas/types.yaml#/definitions/string
> + enum:
> + - low-speed
> + - full-speed
> + - high-speed
> + - super-speed
> + - super-speed-plus
> +
> additionalProperties: true
>
> ...
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