The i.MX USB glue and DWC3 core are closely coupled. Describe the i.MX
USB block in a single block will bring more benefits than a parent-
child relation. The new binding is a copy of fsl,imx8mp-dwc3.yaml with
the needed modifications.
Add the common compatible string "fsl,imx-dwc3" to indicate that the
flattened module should be selected. This compatible is also used by
"select" to inform the DeviceTree validator to apply this binding.
To avoid redefining all the platform-specific compatibles, "select" is
used to tell the DeviceTree validator which binding to use solely on the
generic compatible.
Mark fsl,imx8mp-dwc3 deprecated, to favor expressing future platforms
using the new combined binding.
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
---
Changes in v2:
- reorder compatible property
---
.../devicetree/bindings/usb/fsl,imx-dwc3.yaml | 131 +++++++++++++++++++++
.../devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml | 13 ++
2 files changed, 144 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/fsl,imx-dwc3.yaml b/Documentation/devicetree/bindings/usb/fsl,imx-dwc3.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..6932804516948bc0f8457553eee7e5ee704237f0
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/fsl,imx-dwc3.yaml
@@ -0,0 +1,131 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2026 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/fsl,imx-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX Soc USB Controller
+
+maintainers:
+ - Xu Yang <xu.yang_2@nxp.com>
+
+select:
+ properties:
+ compatible:
+ contains:
+ const: fsl,imx-dwc3
+ required:
+ - compatible
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - fsl,imx8mp-dwc3
+ - fsl,imx94-dwc3
+ - fsl,imx95-dwc3
+ - const: fsl,imx-dwc3
+
+ reg:
+ items:
+ - description: DWC3 core registers
+ - description: HSIO Block Control registers
+ - description: Wrapper registers of dwc3 core
+
+ reg-names:
+ items:
+ - const: core
+ - const: blkctl
+ - const: glue
+
+ interrupts:
+ items:
+ - description: DWC3 controller interrupt
+ - description: Wakeup interrupt from glue logic
+
+ interrupt-names:
+ items:
+ - const: dwc_usb3
+ - const: wakeup
+
+ iommus:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: System hsio root clock
+ - description: SoC Bus Clock for AHB/AXI/Native
+ - description: Reference clock for generating ITP when UTMI/ULPI PHY is suspended
+ - description: Suspend clock used for usb wakeup logic
+
+ clock-names:
+ items:
+ - const: hsio
+ - const: bus_early
+ - const: ref
+ - const: suspend
+
+ fsl,permanently-attached:
+ type: boolean
+ description:
+ Indicates if the device attached to a downstream port is
+ permanently attached
+
+ fsl,disable-port-power-control:
+ type: boolean
+ description:
+ Indicates whether the host controller implementation includes port
+ power control. Defines Bit 3 in capability register (HCCPARAMS)
+
+ fsl,over-current-active-low:
+ type: boolean
+ description:
+ Over current signal polarity is active low
+
+ fsl,power-active-low:
+ type: boolean
+ description:
+ Power pad (PWR) polarity is active low
+
+ power-domains:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - interrupts
+ - power-domains
+
+allOf:
+ - $ref: snps,dwc3-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ usb@4c100000 {
+ compatible = "fsl,imx943-dwc3", "fsl,imx-dwc3";
+ reg = <0x4c100000 0x10000>,
+ <0x4c010010 0x04>,
+ <0x4c1f0000 0x20>;
+ reg-names = "core", "blkctl", "glue";
+ clocks = <&scmi_clk 74>, //IMX94_CLK_HSIO
+ <&scmi_clk 74>, //IMX94_CLK_HSIO
+ <&scmi_clk 2>, //IMX94_CLK_24M
+ <&scmi_clk 1>; //IMX94_CLK_32K
+ clock-names = "hsio", "bus_early", "ref", "suspend";
+ interrupts = <GIC_SPI 180 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 386 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "dwc_usb3", "wakeup";
+ power-domains = <&scmi_devpd 13>; //IMX94_PD_HSIO_TOP
+ phys = <&usb3_phy>, <&usb3_phy>;
+ phy-names = "usb2-phy", "usb3-phy";
+ snps,gfladj-refclk-lpm-sel-quirk;
+ snps,parkmode-disable-ss-quirk;
+ status = "disabled";
+ };
diff --git a/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
index 73e7a60a0060dee6417b9469251e121704b7a148..fd23c345149e0dba1ed3919a25195edf247cfc08 100644
--- a/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
@@ -10,6 +10,19 @@ title: NXP iMX8MP Soc USB Controller
maintainers:
- Li Jun <jun.li@nxp.com>
+deprecated: true
+
+select:
+ properties:
+ compatible:
+ oneOf:
+ - items:
+ - const: fsl,imx95-dwc3
+ - const: fsl,imx8mp-dwc3
+ - const: fsl,imx8mp-dwc3
+ required:
+ - compatible
+
properties:
compatible:
oneOf:
--
2.34.1On Wed, Feb 4, 2026 at 5:05 AM Xu Yang <xu.yang_2@nxp.com> wrote:
>
> The i.MX USB glue and DWC3 core are closely coupled. Describe the i.MX
> USB block in a single block will bring more benefits than a parent-
> child relation. The new binding is a copy of fsl,imx8mp-dwc3.yaml with
> the needed modifications.
>
> Add the common compatible string "fsl,imx-dwc3" to indicate that the
> flattened module should be selected. This compatible is also used by
> "select" to inform the DeviceTree validator to apply this binding.
>
> To avoid redefining all the platform-specific compatibles, "select" is
> used to tell the DeviceTree validator which binding to use solely on the
> generic compatible.
>
> Mark fsl,imx8mp-dwc3 deprecated, to favor expressing future platforms
> using the new combined binding.
>
> Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
>
> ---
> Changes in v2:
> - reorder compatible property
> ---
> .../devicetree/bindings/usb/fsl,imx-dwc3.yaml | 131 +++++++++++++++++++++
> .../devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml | 13 ++
> 2 files changed, 144 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/usb/fsl,imx-dwc3.yaml b/Documentation/devicetree/bindings/usb/fsl,imx-dwc3.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..6932804516948bc0f8457553eee7e5ee704237f0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/fsl,imx-dwc3.yaml
> @@ -0,0 +1,131 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright 2026 NXP
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/fsl,imx-dwc3.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX Soc USB Controller
> +
> +maintainers:
> + - Xu Yang <xu.yang_2@nxp.com>
> +
> +select:
> + properties:
> + compatible:
> + contains:
> + const: fsl,imx-dwc3
> + required:
> + - compatible
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - fsl,imx8mp-dwc3
You can't reuse the same compatible for a new binding.
> + - fsl,imx94-dwc3
> + - fsl,imx95-dwc3
> + - const: fsl,imx-dwc3
Drop. If you want a fallback, use the 1st SoC's compatible.
> +
> + reg:
> + items:
> + - description: DWC3 core registers
> + - description: HSIO Block Control registers
> + - description: Wrapper registers of dwc3 core
> +
> + reg-names:
> + items:
> + - const: core
> + - const: blkctl
> + - const: glue
> +
> + interrupts:
> + items:
> + - description: DWC3 controller interrupt
> + - description: Wakeup interrupt from glue logic
> +
> + interrupt-names:
> + items:
> + - const: dwc_usb3
> + - const: wakeup
> +
> + iommus:
> + maxItems: 1
> +
> + clocks:
> + items:
> + - description: System hsio root clock
> + - description: SoC Bus Clock for AHB/AXI/Native
> + - description: Reference clock for generating ITP when UTMI/ULPI PHY is suspended
> + - description: Suspend clock used for usb wakeup logic
> +
> + clock-names:
> + items:
> + - const: hsio
> + - const: bus_early
> + - const: ref
> + - const: suspend
> +
> + fsl,permanently-attached:
> + type: boolean
> + description:
> + Indicates if the device attached to a downstream port is
> + permanently attached
> +
> + fsl,disable-port-power-control:
> + type: boolean
> + description:
> + Indicates whether the host controller implementation includes port
> + power control. Defines Bit 3 in capability register (HCCPARAMS)
> +
> + fsl,over-current-active-low:
> + type: boolean
> + description:
> + Over current signal polarity is active low
> +
> + fsl,power-active-low:
> + type: boolean
> + description:
> + Power pad (PWR) polarity is active low
> +
> + power-domains:
> + maxItems: 1
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - clock-names
> + - interrupts
> + - power-domains
> +
> +allOf:
> + - $ref: snps,dwc3-common.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + usb@4c100000 {
> + compatible = "fsl,imx943-dwc3", "fsl,imx-dwc3";
> + reg = <0x4c100000 0x10000>,
> + <0x4c010010 0x04>,
> + <0x4c1f0000 0x20>;
> + reg-names = "core", "blkctl", "glue";
> + clocks = <&scmi_clk 74>, //IMX94_CLK_HSIO
> + <&scmi_clk 74>, //IMX94_CLK_HSIO
> + <&scmi_clk 2>, //IMX94_CLK_24M
> + <&scmi_clk 1>; //IMX94_CLK_32K
> + clock-names = "hsio", "bus_early", "ref", "suspend";
> + interrupts = <GIC_SPI 180 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 386 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "dwc_usb3", "wakeup";
> + power-domains = <&scmi_devpd 13>; //IMX94_PD_HSIO_TOP
> + phys = <&usb3_phy>, <&usb3_phy>;
> + phy-names = "usb2-phy", "usb3-phy";
> + snps,gfladj-refclk-lpm-sel-quirk;
> + snps,parkmode-disable-ss-quirk;
> + status = "disabled";
Examples should be enabled.
> + };
> diff --git a/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
> index 73e7a60a0060dee6417b9469251e121704b7a148..fd23c345149e0dba1ed3919a25195edf247cfc08 100644
> --- a/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
> +++ b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
> @@ -10,6 +10,19 @@ title: NXP iMX8MP Soc USB Controller
> maintainers:
> - Li Jun <jun.li@nxp.com>
>
> +deprecated: true
> +
> +select:
> + properties:
> + compatible:
> + oneOf:
> + - items:
> + - const: fsl,imx95-dwc3
> + - const: fsl,imx8mp-dwc3
> + - const: fsl,imx8mp-dwc3
> + required:
> + - compatible
> +
> properties:
> compatible:
> oneOf:
>
> --
> 2.34.1
>
>
On Wed, Feb 04, 2026 at 07:46:11AM -0600, Rob Herring wrote: > On Wed, Feb 4, 2026 at 5:05 AM Xu Yang <xu.yang_2@nxp.com> wrote: > > + > > +properties: > > + compatible: > > + items: > > + - enum: > > + - fsl,imx8mp-dwc3 > > You can't reuse the same compatible for a new binding. OK. Will use a different name. > > > + - fsl,imx94-dwc3 > > + - fsl,imx95-dwc3 > > + - const: fsl,imx-dwc3 > > Drop. If you want a fallback, use the 1st SoC's compatible. OK. > > > + > > + reg: > > + items: > > + - description: DWC3 core registers > > + - description: HSIO Block Control registers > > + - description: Wrapper registers of dwc3 core > > + [...] > > + power-domains = <&scmi_devpd 13>; //IMX94_PD_HSIO_TOP > > + phys = <&usb3_phy>, <&usb3_phy>; > > + phy-names = "usb2-phy", "usb3-phy"; > > + snps,gfladj-refclk-lpm-sel-quirk; > > + snps,parkmode-disable-ss-quirk; > > + status = "disabled"; > > Examples should be enabled. OK. Thanks, Xu Yang
On Wed, 04 Feb 2026 19:06:16 +0800, Xu Yang wrote: > The i.MX USB glue and DWC3 core are closely coupled. Describe the i.MX > USB block in a single block will bring more benefits than a parent- > child relation. The new binding is a copy of fsl,imx8mp-dwc3.yaml with > the needed modifications. > > Add the common compatible string "fsl,imx-dwc3" to indicate that the > flattened module should be selected. This compatible is also used by > "select" to inform the DeviceTree validator to apply this binding. > > To avoid redefining all the platform-specific compatibles, "select" is > used to tell the DeviceTree validator which binding to use solely on the > generic compatible. > > Mark fsl,imx8mp-dwc3 deprecated, to favor expressing future platforms > using the new combined binding. > > Signed-off-by: Xu Yang <xu.yang_2@nxp.com> > > --- > Changes in v2: > - reorder compatible property > --- > .../devicetree/bindings/usb/fsl,imx-dwc3.yaml | 131 +++++++++++++++++++++ > .../devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml | 13 ++ > 2 files changed, 144 insertions(+) > My bot found errors running 'make dt_binding_check' on your patch: yamllint warnings/errors: dtschema/dtc warnings/errors: Documentation/devicetree/bindings/usb/fsl,imx-dwc3.example.dtb: /example-0/usb@4c100000: failed to match any schema with compatible: ['fsl,imx943-dwc3', 'fsl,imx-dwc3'] /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/usb/fsl,imx-dwc3.example.dtb: usb@4c100000 (fsl,imx943-dwc3): compatible:0: 'fsl,imx943-dwc3' is not one of ['fsl,imx8mp-dwc3', 'fsl,imx94-dwc3', 'fsl,imx95-dwc3'] from schema $id: http://devicetree.org/schemas/usb/fsl,imx-dwc3.yaml doc reference errors (make refcheckdocs): See https://patchwork.kernel.org/project/devicetree/patch/20260204-add-flatten-dts-based-dwc3-imx-driver-v2-1-d2c9b5a58c01@nxp.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.
© 2016 - 2026 Red Hat, Inc.