linux-kernel - [PATCH v3 1/3] dt-bindings: usb: introduce nxp,imx-dwc3

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Message-Id: <20260206-add-flatten-dts-based-dwc3-imx-driver-v3-1-ebd9b9b77049@nxp.com>
Date: Fri, 06 Feb 2026 18:18:49 +0800
From: Xu Yang <xu.yang_2@....com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Frank Li <frank.li@....com>, 
 Li Jun <jun.li@....com>, Thinh Nguyen <Thinh.Nguyen@...opsys.com>
Cc: linux-usb@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Xu Yang <xu.yang_2@....com>
Subject: [PATCH v3 1/3] dt-bindings: usb: introduce nxp,imx-dwc3

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 used to describe flattened usb controller
node. It's a copy of the legacy binding fsl,imx8mp-dwc3.yaml with the
needed modifications.

Signed-off-by: Xu Yang <xu.yang_2@....com>

---
Changes in v3:
 - rename file name as nxp,imx-dwc3.yaml
 - rename compatible as nxp,imx*-dwc3
 - remove status property in example node
 - remove select block
 - modify commit message
Changes in v2:
 - reorder compatible property
---
 .../devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml   |   2 +
 .../devicetree/bindings/usb/nxp,imx-dwc3.yaml      | 123 +++++++++++++++++++++
 2 files changed, 125 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
index 73e7a60a0060..66d368e65c0a 100644
--- a/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.yaml
@@ -10,6 +10,8 @@ title: NXP iMX8MP Soc USB Controller
 maintainers:
   - Li Jun <jun.li@....com>
 
+deprecated: true
+
 properties:
   compatible:
     oneOf:
diff --git a/Documentation/devicetree/bindings/usb/nxp,imx-dwc3.yaml b/Documentation/devicetree/bindings/usb/nxp,imx-dwc3.yaml
new file mode 100644
index 000000000000..1911e71f01eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/nxp,imx-dwc3.yaml
@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2026 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/nxp,imx-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX Soc USB Controller
+
+maintainers:
+  - Xu Yang <xu.yang_2@....com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - nxp,imx94-dwc3
+              - nxp,imx95-dwc3
+          - const: nxp,imx8mp-dwc3
+      - const: nxp,imx8mp-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@...00000 {
+      compatible = "nxp,imx94-dwc3", "nxp,imx8mp-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;
+    };

-- 
2.34.1