diff mbox series

[v5,10/19] dt-bindings: usb: Convert DWC USB3 bindings to DT schema

Message ID 20201205152427.29537-11-Sergey.Semin@baikalelectronics.ru
State Superseded
Headers show
Series dt-bindings: usb: Add generic USB HCD, xHCI, DWC USB3 DT schema | expand

Commit Message

Serge Semin Dec. 5, 2020, 3:24 p.m. UTC
DWC USB3 DT node is supposed to be compliant with the Generic xHCI
Controller schema, but with additional vendor-specific properties, the
controller-specific reference clocks and PHYs. So let's convert the
currently available legacy text-based DWC USB3 bindings to the DT schema
and make sure the DWC USB3 nodes are also validated against the
usb-xhci.yaml schema.

Note 1. we have to discard the nodename restriction of being prefixed with
"dwc3@" string, since in accordance with the usb-hcd.yaml schema USB nodes
are supposed to be named as "^usb(@.*)".

Note 2. The clock-related properties are marked as optional to match the
DWC USB3 driver expectation and to improve the bindings mainainability
so in case if there is a glue-node it would the responsible for the
clocks initialization.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>

---

Changelog v2:
- Discard '|' from the descriptions, since we don't need to preserve
  the text formatting in any of them.
- Drop quotes from around the string constants.
- Fix the "clock-names" prop description to be referring the enumerated
  clock-names instead of the ones from the Databook.

Changelog v3:
- Apply usb-xhci.yaml# schema only if the controller is supposed to work
  as either host or otg.

Changelog v4:
- Apply usb-drd.yaml schema first. If the controller is configured
  to work in a gadget mode only, then apply the usb.yaml schema too,
  otherwise apply the usb-xhci.yaml schema.
- Discard the Rob'es Reviewed-by tag. Please review the patch one more
  time.

Changelog v5:
- Add "snps,dis-split-quirk" property to the DWC USB3 DT schema.
- Add a commit log text about the clock-related property changes.
- Make sure dr_mode exist to apply the USB-gadget-only schema.
---
 .../devicetree/bindings/usb/dwc3.txt          | 128 -------
 .../devicetree/bindings/usb/snps,dwc3.yaml    | 312 ++++++++++++++++++
 2 files changed, 312 insertions(+), 128 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/usb/dwc3.txt
 create mode 100644 Documentation/devicetree/bindings/usb/snps,dwc3.yaml

Comments

Chunfeng Yun (云春峰) Dec. 7, 2020, 9:35 a.m. UTC | #1
On Sat, 2020-12-05 at 18:24 +0300, Serge Semin wrote:
> DWC USB3 DT node is supposed to be compliant with the Generic xHCI

> Controller schema, but with additional vendor-specific properties, the

> controller-specific reference clocks and PHYs. So let's convert the

> currently available legacy text-based DWC USB3 bindings to the DT schema

> and make sure the DWC USB3 nodes are also validated against the

> usb-xhci.yaml schema.

> 

> Note 1. we have to discard the nodename restriction of being prefixed with

> "dwc3@" string, since in accordance with the usb-hcd.yaml schema USB nodes

> are supposed to be named as "^usb(@.*)".

> 

> Note 2. The clock-related properties are marked as optional to match the

> DWC USB3 driver expectation and to improve the bindings mainainability

> so in case if there is a glue-node it would the responsible for the

> clocks initialization.

> 

> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>

> 

> ---

> 

> Changelog v2:

> - Discard '|' from the descriptions, since we don't need to preserve

>   the text formatting in any of them.

> - Drop quotes from around the string constants.

> - Fix the "clock-names" prop description to be referring the enumerated

>   clock-names instead of the ones from the Databook.

> 

> Changelog v3:

> - Apply usb-xhci.yaml# schema only if the controller is supposed to work

>   as either host or otg.

> 

> Changelog v4:

> - Apply usb-drd.yaml schema first. If the controller is configured

>   to work in a gadget mode only, then apply the usb.yaml schema too,

>   otherwise apply the usb-xhci.yaml schema.

> - Discard the Rob'es Reviewed-by tag. Please review the patch one more

>   time.

> 

> Changelog v5:

> - Add "snps,dis-split-quirk" property to the DWC USB3 DT schema.

> - Add a commit log text about the clock-related property changes.

> - Make sure dr_mode exist to apply the USB-gadget-only schema.

> ---

>  .../devicetree/bindings/usb/dwc3.txt          | 128 -------

>  .../devicetree/bindings/usb/snps,dwc3.yaml    | 312 ++++++++++++++++++

>  2 files changed, 312 insertions(+), 128 deletions(-)

>  delete mode 100644 Documentation/devicetree/bindings/usb/dwc3.txt

>  create mode 100644 Documentation/devicetree/bindings/usb/snps,dwc3.yaml

> 

> diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt

> deleted file mode 100644

> index 1aae2b6160c1..000000000000

> --- a/Documentation/devicetree/bindings/usb/dwc3.txt

> +++ /dev/null

> @@ -1,128 +0,0 @@

> -synopsys DWC3 CORE

> -

[...]
> +

> +  clock-names:

> +    contains:

> +      anyOf:

> +        - enum: [bus_early, ref, suspend]

> +        - true

> +

> +  usb-phy:

> +   minItems: 1

indentation: expected 4
> +   items:

> +     - description: USB2/HS PHY

> +     - description: USB3/SS PHY

> +

> +  phys:

> +    minItems: 1

> +    items:

> +      - description: USB2/HS PHY

> +      - description: USB3/SS PHY

> +

> +  phy-names:

> +    minItems: 1

> +    items:

> +      - const: usb2-phy

> +      - const: usb3-phy

[...]
Rob Herring (Arm) Dec. 7, 2020, 4:49 p.m. UTC | #2
On Sat, 05 Dec 2020 18:24:17 +0300, Serge Semin wrote:
> DWC USB3 DT node is supposed to be compliant with the Generic xHCI
> Controller schema, but with additional vendor-specific properties, the
> controller-specific reference clocks and PHYs. So let's convert the
> currently available legacy text-based DWC USB3 bindings to the DT schema
> and make sure the DWC USB3 nodes are also validated against the
> usb-xhci.yaml schema.
> 
> Note 1. we have to discard the nodename restriction of being prefixed with
> "dwc3@" string, since in accordance with the usb-hcd.yaml schema USB nodes
> are supposed to be named as "^usb(@.*)".
> 
> Note 2. The clock-related properties are marked as optional to match the
> DWC USB3 driver expectation and to improve the bindings mainainability
> so in case if there is a glue-node it would the responsible for the
> clocks initialization.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
> 
> ---
> 
> Changelog v2:
> - Discard '|' from the descriptions, since we don't need to preserve
>   the text formatting in any of them.
> - Drop quotes from around the string constants.
> - Fix the "clock-names" prop description to be referring the enumerated
>   clock-names instead of the ones from the Databook.
> 
> Changelog v3:
> - Apply usb-xhci.yaml# schema only if the controller is supposed to work
>   as either host or otg.
> 
> Changelog v4:
> - Apply usb-drd.yaml schema first. If the controller is configured
>   to work in a gadget mode only, then apply the usb.yaml schema too,
>   otherwise apply the usb-xhci.yaml schema.
> - Discard the Rob'es Reviewed-by tag. Please review the patch one more
>   time.
> 
> Changelog v5:
> - Add "snps,dis-split-quirk" property to the DWC USB3 DT schema.
> - Add a commit log text about the clock-related property changes.
> - Make sure dr_mode exist to apply the USB-gadget-only schema.
> ---
>  .../devicetree/bindings/usb/dwc3.txt          | 128 -------
>  .../devicetree/bindings/usb/snps,dwc3.yaml    | 312 ++++++++++++++++++
>  2 files changed, 312 insertions(+), 128 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/usb/dwc3.txt
>  create mode 100644 Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> 


My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:
./Documentation/devicetree/bindings/usb/snps,dwc3.yaml:55:4: [warning] wrong indentation: expected 4 but found 3 (indentation)

dtschema/dtc warnings/errors:
Unknown file referenced: [Errno 2] No such file or directory: '/usr/local/lib/python3.8/dist-packages/dtschema/schemas/usb/usb-drd.yaml'
xargs: dt-doc-validate: exited with status 255; aborting
make[1]: *** [Documentation/devicetree/bindings/Makefile:59: Documentation/devicetree/bindings/processed-schema-examples.json] Error 124
make: *** [Makefile:1364: dt_binding_check] Error 2


See https://patchwork.ozlabs.org/patch/1411582

The base for the patch is generally the last rc1. Any dependencies
should be noted.

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.
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
deleted file mode 100644
index 1aae2b6160c1..000000000000
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ /dev/null
@@ -1,128 +0,0 @@ 
-synopsys DWC3 CORE
-
-DWC3- USB3 CONTROLLER. Complies to the generic USB binding properties
-      as described in 'usb/generic.txt'
-
-Required properties:
- - compatible: must be "snps,dwc3"
- - reg : Address and length of the register set for the device
- - interrupts: Interrupts used by the dwc3 controller.
- - clock-names: list of clock names. Ideally should be "ref",
-                "bus_early", "suspend" but may be less or more.
- - clocks: list of phandle and clock specifier pairs corresponding to
-           entries in the clock-names property.
-
-Exception for clocks:
-  clocks are optional if the parent node (i.e. glue-layer) is compatible to
-  one of the following:
-    "cavium,octeon-7130-usb-uctl"
-    "qcom,dwc3"
-    "samsung,exynos5250-dwusb3"
-    "samsung,exynos5433-dwusb3"
-    "samsung,exynos7-dwusb3"
-    "sprd,sc9860-dwc3"
-    "st,stih407-dwc3"
-    "ti,am437x-dwc3"
-    "ti,dwc3"
-    "ti,keystone-dwc3"
-    "rockchip,rk3399-dwc3"
-    "xlnx,zynqmp-dwc3"
-
-Optional properties:
- - usb-phy : array of phandle for the PHY device.  The first element
-   in the array is expected to be a handle to the USB2/HS PHY and
-   the second element is expected to be a handle to the USB3/SS PHY
- - phys: from the *Generic PHY* bindings
- - phy-names: from the *Generic PHY* bindings; supported names are "usb2-phy"
-	or "usb3-phy".
- - resets: set of phandle and reset specifier pairs
- - snps,usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
- - snps,usb3_lpm_capable: determines if platform is USB3 LPM capable
- - snps,dis-start-transfer-quirk: when set, disable isoc START TRANSFER command
-			failure SW work-around for DWC_usb31 version 1.70a-ea06
-			and prior.
- - snps,disable_scramble_quirk: true when SW should disable data scrambling.
-	Only really useful for FPGA builds.
- - snps,has-lpm-erratum: true when DWC3 was configured with LPM Erratum enabled
- - snps,lpm-nyet-threshold: LPM NYET threshold
- - snps,u2exit_lfps_quirk: set if we want to enable u2exit lfps quirk
- - snps,u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk
- - snps,req_p1p2p3_quirk: when set, the core will always request for
-			P1/P2/P3 transition sequence.
- - snps,del_p1p2p3_quirk: when set core will delay P1/P2/P3 until a certain
-			amount of 8B10B errors occur.
- - snps,del_phy_power_chg_quirk: when set core will delay PHY power change
-			from P0 to P1/P2/P3.
- - snps,lfps_filter_quirk: when set core will filter LFPS reception.
- - snps,rx_detect_poll_quirk: when set core will disable a 400us delay to start
-			Polling LFPS after RX.Detect.
- - snps,tx_de_emphasis_quirk: when set core will set Tx de-emphasis value.
- - snps,tx_de_emphasis: the value driven to the PHY is controlled by the
-			LTSSM during USB3 Compliance mode.
- - snps,dis_u3_susphy_quirk: when set core will disable USB3 suspend phy.
- - snps,dis_u2_susphy_quirk: when set core will disable USB2 suspend phy.
- - snps,dis_enblslpm_quirk: when set clears the enblslpm in GUSB2PHYCFG,
-			disabling the suspend signal to the PHY.
- - snps,dis-u1-entry-quirk: set if link entering into U1 needs to be disabled.
- - snps,dis-u2-entry-quirk: set if link entering into U2 needs to be disabled.
- - snps,dis_rxdet_inp3_quirk: when set core will disable receiver detection
-			in PHY P3 power state.
- - snps,dis-u2-freeclk-exists-quirk: when set, clear the u2_freeclk_exists
-			in GUSB2PHYCFG, specify that USB2 PHY doesn't provide
-			a free-running PHY clock.
- - snps,dis-del-phy-power-chg-quirk: when set core will change PHY power
-			from P0 to P1/P2/P3 without delay.
- - snps,dis-tx-ipgap-linecheck-quirk: when set, disable u2mac linestate check
-			during HS transmit.
- - snps,parkmode-disable-ss-quirk: when set, all SuperSpeed bus instances in
-			park mode are disabled.
- - snps,dis_metastability_quirk: when set, disable metastability workaround.
-			CAUTION: use only if you are absolutely sure of it.
- - snps,dis-split-quirk: when set, change the way URBs are handled by the
-			 driver. Needed to avoid -EPROTO errors with usbhid
-			 on some devices (Hikey 970).
- - snps,is-utmi-l1-suspend: true when DWC3 asserts output signal
-			utmi_l1_suspend_n, false when asserts utmi_sleep_n
- - snps,hird-threshold: HIRD threshold
- - snps,hsphy_interface: High-Speed PHY interface selection between "utmi" for
-   UTMI+ and "ulpi" for ULPI when the DWC_USB3_HSPHY_INTERFACE has value 3.
- - snps,quirk-frame-length-adjustment: Value for GFLADJ_30MHZ field of GFLADJ
-	register for post-silicon frame length adjustment when the
-	fladj_30mhz_sdbnd signal is invalid or incorrect.
- - snps,rx-thr-num-pkt-prd: periodic ESS RX packet threshold count - host mode
-			only. Set this and rx-max-burst-prd to a valid,
-			non-zero value 1-16 (DWC_usb31 programming guide
-			section 1.2.4) to enable periodic ESS RX threshold.
- - snps,rx-max-burst-prd: max periodic ESS RX burst size - host mode only. Set
-			this and rx-thr-num-pkt-prd to a valid, non-zero value
-			1-16 (DWC_usb31 programming guide section 1.2.4) to
-			enable periodic ESS RX threshold.
- - snps,tx-thr-num-pkt-prd: periodic ESS TX packet threshold count - host mode
-			only. Set this and tx-max-burst-prd to a valid,
-			non-zero value 1-16 (DWC_usb31 programming guide
-			section 1.2.3) to enable periodic ESS TX threshold.
- - snps,tx-max-burst-prd: max periodic ESS TX burst size - host mode only. Set
-			this and tx-thr-num-pkt-prd to a valid, non-zero value
-			1-16 (DWC_usb31 programming guide section 1.2.3) to
-			enable periodic ESS TX threshold.
-
- - <DEPRECATED> tx-fifo-resize: determines if the FIFO *has* to be reallocated.
- - snps,incr-burst-type-adjustment: Value for INCR burst type of GSBUSCFG0
-			register, undefined length INCR burst type enable and INCRx type.
-			When just one value, which means INCRX burst mode enabled. When
-			more than one value, which means undefined length INCR burst type
-			enabled. The values can be 1, 4, 8, 16, 32, 64, 128 and 256.
-
- - in addition all properties from usb-xhci.txt from the current directory are
-   supported as well
-
-
-This is usually a subnode to DWC3 glue to which it is connected.
-
-dwc3@4a030000 {
-	compatible = "snps,dwc3";
-	reg = <0x4a030000 0xcfff>;
-	interrupts = <0 92 4>
-	usb-phy = <&usb2_phy>, <&usb3,phy>;
-	snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
-};
diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
new file mode 100644
index 000000000000..f645fd918421
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -0,0 +1,312 @@ 
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/snps,dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys DesignWare USB3 Controller
+
+maintainers:
+  - Felipe Balbi <balbi@kernel.org>
+
+description:
+  This is usually a subnode to DWC3 glue to which it is connected, but can also
+  be presented as a standalone DT node with an optional vendor-specific
+  compatible string.
+
+allOf:
+  - $ref: usb-drd.yaml#
+  - if:
+      properties:
+        dr_mode:
+          const: peripheral
+
+      required:
+        - dr_mode
+    then:
+      $ref: usb.yaml#
+    else:
+      $ref: usb-xhci.yaml#
+
+properties:
+  compatible:
+    contains:
+      const: snps,dwc3
+
+  interrupts:
+    minItems: 1
+    maxItems: 3
+
+  clocks:
+    description:
+      In general the core supports three types of clocks. bus_early is a
+      SoC Bus Clock (AHB/AXI/Native). ref generates ITP when the UTMI/ULPI
+      PHY is suspended. suspend clocks a small part of the USB3 core when
+      SS PHY in P3. But particular cases may differ from that having less
+      or more clock sources with another names.
+
+  clock-names:
+    contains:
+      anyOf:
+        - enum: [bus_early, ref, suspend]
+        - true
+
+  usb-phy:
+   minItems: 1
+   items:
+     - description: USB2/HS PHY
+     - description: USB3/SS PHY
+
+  phys:
+    minItems: 1
+    items:
+      - description: USB2/HS PHY
+      - description: USB3/SS PHY
+
+  phy-names:
+    minItems: 1
+    items:
+      - const: usb2-phy
+      - const: usb3-phy
+
+  resets:
+    minItems: 1
+
+  snps,usb2-lpm-disable:
+    description: Indicate if we don't want to enable USB2 HW LPM
+    type: boolean
+
+  snps,usb3_lpm_capable:
+    description: Determines if platform is USB3 LPM capable
+    type: boolean
+
+  snps,dis-start-transfer-quirk:
+    description:
+      When set, disable isoc START TRANSFER command failure SW work-around
+      for DWC_usb31 version 1.70a-ea06 and prior.
+    type: boolean
+
+  snps,disable_scramble_quirk:
+    description:
+      True when SW should disable data scrambling. Only really useful for FPGA
+      builds.
+    type: boolean
+
+  snps,has-lpm-erratum:
+    description: True when DWC3 was configured with LPM Erratum enabled
+    type: boolean
+
+  snps,lpm-nyet-threshold:
+    description: LPM NYET threshold
+    $ref: /schemas/types.yaml#/definitions/uint8
+
+  snps,u2exit_lfps_quirk:
+    description: Set if we want to enable u2exit lfps quirk
+    type: boolean
+
+  snps,u2ss_inp3_quirk:
+    description: Set if we enable P3 OK for U2/SS Inactive quirk
+    type: boolean
+
+  snps,req_p1p2p3_quirk:
+    description:
+      When set, the core will always request for P1/P2/P3 transition sequence.
+    type: boolean
+
+  snps,del_p1p2p3_quirk:
+    description:
+      When set core will delay P1/P2/P3 until a certain amount of 8B10B errors
+      occur.
+    type: boolean
+
+  snps,del_phy_power_chg_quirk:
+    description: When set core will delay PHY power change from P0 to P1/P2/P3.
+    type: boolean
+
+  snps,lfps_filter_quirk:
+    description: When set core will filter LFPS reception.
+    type: boolean
+
+  snps,rx_detect_poll_quirk:
+    description:
+      when set core will disable a 400us delay to start Polling LFPS after
+      RX.Detect.
+    type: boolean
+
+  snps,tx_de_emphasis_quirk:
+    description: When set core will set Tx de-emphasis value
+    type: boolean
+
+  snps,tx_de_emphasis:
+    description:
+      The value driven to the PHY is controlled by the LTSSM during USB3
+      Compliance mode.
+    $ref: /schemas/types.yaml#/definitions/uint8
+
+  snps,dis_u3_susphy_quirk:
+    description: When set core will disable USB3 suspend phy
+    type: boolean
+
+  snps,dis_u2_susphy_quirk:
+    description: When set core will disable USB2 suspend phy
+    type: boolean
+
+  snps,dis_enblslpm_quirk:
+    description:
+      When set clears the enblslpm in GUSB2PHYCFG, disabling the suspend signal
+      to the PHY.
+    type: boolean
+
+  snps,dis-u1-entry-quirk:
+    description: Set if link entering into U1 needs to be disabled
+    type: boolean
+
+  snps,dis-u2-entry-quirk:
+    description: Set if link entering into U2 needs to be disabled
+    type: boolean
+
+  snps,dis_rxdet_inp3_quirk:
+    description:
+      When set core will disable receiver detection in PHY P3 power state.
+    type: boolean
+
+  snps,dis-u2-freeclk-exists-quirk:
+    description:
+      When set, clear the u2_freeclk_exists in GUSB2PHYCFG, specify that USB2
+      PHY doesn't provide a free-running PHY clock.
+    type: boolean
+
+  snps,dis-del-phy-power-chg-quirk:
+    description:
+      When set core will change PHY power from P0 to P1/P2/P3 without delay.
+    type: boolean
+
+  snps,dis-tx-ipgap-linecheck-quirk:
+    description: When set, disable u2mac linestate check during HS transmit
+    type: boolean
+
+  snps,parkmode-disable-ss-quirk:
+    description:
+      When set, all SuperSpeed bus instances in park mode are disabled.
+    type: boolean
+
+  snps,dis_metastability_quirk:
+    description:
+      When set, disable metastability workaround. CAUTION! Use only if you are
+      absolutely sure of it.
+    type: boolean
+
+  snps,dis-split-quirk:
+    description:
+      When set, change the way URBs are handled by the driver. Needed to
+      avoid -EPROTO errors with usbhid on some devices (Hikey 970).
+    type: boolean
+
+  snps,is-utmi-l1-suspend:
+    description:
+      True when DWC3 asserts output signal utmi_l1_suspend_n, false when
+      asserts utmi_sleep_n.
+    type: boolean
+
+  snps,hird-threshold:
+    description: HIRD threshold
+    $ref: /schemas/types.yaml#/definitions/uint8
+
+  snps,hsphy_interface:
+    description:
+      High-Speed PHY interface selection between UTMI+ and ULPI when the
+      DWC_USB3_HSPHY_INTERFACE has value 3.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [utmi, ulpi]
+
+  snps,quirk-frame-length-adjustment:
+    description:
+      Value for GFLADJ_30MHZ field of GFLADJ register for post-silicon frame
+      length adjustment when the fladj_30mhz_sdbnd signal is invalid or
+      incorrect.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  snps,rx-thr-num-pkt-prd:
+    description:
+      Periodic ESS RX packet threshold count (host mode only). Set this and
+      snps,rx-max-burst-prd to a valid, non-zero value 1-16 (DWC_usb31
+      programming guide section 1.2.4) to enable periodic ESS RX threshold.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    minimum: 1
+    maximum: 16
+
+  snps,rx-max-burst-prd:
+    description:
+      Max periodic ESS RX burst size (host mode only). Set this and
+      snps,rx-thr-num-pkt-prd to a valid, non-zero value 1-16 (DWC_usb31
+      programming guide section 1.2.4) to enable periodic ESS RX threshold.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    minimum: 1
+    maximum: 16
+
+  snps,tx-thr-num-pkt-prd:
+    description:
+      Periodic ESS TX packet threshold count (host mode only). Set this and
+      snps,tx-max-burst-prd to a valid, non-zero value 1-16 (DWC_usb31
+      programming guide section 1.2.3) to enable periodic ESS TX threshold.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    minimum: 1
+    maximum: 16
+
+  snps,tx-max-burst-prd:
+    description:
+      Max periodic ESS TX burst size (host mode only). Set this and
+      snps,tx-thr-num-pkt-prd to a valid, non-zero value 1-16 (DWC_usb31
+      programming guide section 1.2.3) to enable periodic ESS TX threshold.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    minimum: 1
+    maximum: 16
+
+  tx-fifo-resize:
+    description: Determines if the FIFO *has* to be reallocated
+    deprecated: true
+    type: boolean
+
+  snps,incr-burst-type-adjustment:
+    description:
+      Value for INCR burst type of GSBUSCFG0 register, undefined length INCR
+      burst type enable and INCRx type. A single value means INCRX burst mode
+      enabled. If more than one value specified, undefined length INCR burst
+      type will be enabled with burst lengths utilized up to the maximum
+      of the values passed in this property.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 8
+    uniqueItems: true
+    items:
+      enum: [1, 4, 8, 16, 32, 64, 128, 256]
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    usb@4a030000 {
+      compatible = "snps,dwc3";
+      reg = <0x4a030000 0xcfff>;
+      interrupts = <0 92 4>;
+      usb-phy = <&usb2_phy>, <&usb3_phy>;
+      snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
+    };
+  - |
+    usb@4a000000 {
+      compatible = "snps,dwc3";
+      reg = <0x4a000000 0xcfff>;
+      interrupts = <0 92 4>;
+      clocks = <&clk 1>, <&clk 2>, <&clk 3>;
+      clock-names = "bus_early", "ref", "suspend";
+      phys = <&usb2_phy>, <&usb3_phy>;
+      phy-names = "usb2-phy", "usb3-phy";
+      snps,dis_u2_susphy_quirk;
+      snps,dis_enblslpm_quirk;
+    };
+...