[PATCH v4 1/2] dt-bindings: usb: dwc3: Add Google Tensor G5 DWC3

Roy Luo
2025-10-17T23:35:18Z

Document the device tree bindings for the DWC3 USB controller found in
Google Tensor SoCs, starting with the G5 generation.

The Tensor G5 silicon represents a complete architectural departure from
previous generations (like gs101), including entirely new clock/reset
schemes, top-level wrapper and register interface. Consequently,
existing Samsung/Exynos DWC3 USB bindings are incompatible, necessitating
this new device tree binding.

The USB controller on Tensor G5 is based on Synopsys DWC3 IP and features
Dual-Role Device single port with hibernation support.

Signed-off-by: Roy Luo <royluo@google.com>
---
.../bindings/usb/google,gs5-dwc3.yaml | 135 ++++++++++++++++++
1 file changed, 135 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/google,gs5-dwc3.yaml

diff --git a/Documentation/devicetree/bindings/usb/google,gs5-dwc3.yaml b/Documentation/devicetree/bindings/usb/google,gs5-dwc3.yaml
new file mode 100644
index 000000000000..09756bf6fd3c
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/google,gs5-dwc3.yaml
@@ -0,0 +1,135 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (c) 2025, Google LLC
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/google,gs5-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google Tensor Series (G5+) DWC3 USB SoC Controller
+
+maintainers:
+ - Roy Luo <royluo@google.com>
+
+description:
+ Describes the DWC3 USB controller block implemented on Google Tensor SoCs,
+ starting with the G5 generation. Based on Synopsys DWC3 IP, the controller
+ features Dual-Role Device single port with hibernation add-on.
+
+properties:
+ compatible:
+ const: google,gs5-dwc3
+
+ reg:
+ items:
+ - description: Core DWC3 IP registers.
+ - description: USB host controller configuration registers.
+ - description: USB custom interrrupts control registers.
+
+ reg-names:
+ items:
+ - const: dwc3_core
+ - const: host_cfg
+ - const: usbint_cfg
+
+ interrupts:
+ items:
+ - description: Core DWC3 interrupt.
+ - description: High speed power management event for remote wakeup.
+ - description: Super speed power management event for remote wakeup.
+
+ interrupt-names:
+ items:
+ - const: core
+ - const: hs_pme
+ - const: ss_pme
+
+ clocks:
+ items:
+ - description: Non-sticky module clock.
+ - description: Sticky module clock.
+
+ clock-names:
+ items:
+ - const: non_sticky
+ - const: sticky
+
+ resets:
+ items:
+ - description: Non-sticky module reset.
+ - description: Sticky module reset.
+ - description: DRD bus reset.
+ - description: Top-level reset.
+
+ reset-names:
+ items:
+ - const: non_sticky
+ - const: sticky
+ - const: drd_bus
+ - const: top
+
+ power-domains:
+ items:
+ - description: Power switchable domain, the child of top domain.
+ Turning it on puts the controller into full power state,
+ turning it off puts the controller into power gated state.
+ - description: Top domain, the parent of power switchable domain.
+ Turning it on puts the controller into power gated state,
+ turning it off completely shuts off the controller.
+
+ power-domain-names:
+ items:
+ - const: psw
+ - const: top
+
+ iommus:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - interrupts
+ - interrupt-names
+ - clocks
+ - clock-names
+ - resets
+ - reset-names
+ - power-domains
+ - power-domain-names
+
+allOf:
+ - $ref: snps,dwc3-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ usb@c400000 {
+ compatible = "google,gs5-dwc3";
+ reg = <0 0x0c400000 0 0xd060>, <0 0x0c450000 0 0x14>, <0 0x0c450020 0 0x43>;
+ reg-names = "dwc3_core", "host_cfg", "usbint_cfg";
+ interrupts = <GIC_SPI 580 IRQ_TYPE_LEVEL_HIGH 0>,
+ <GIC_SPI 597 IRQ_TYPE_LEVEL_HIGH 0>,
+ <GIC_SPI 598 IRQ_TYPE_LEVEL_HIGH 0>;
+ interrupt-names = "core", "hs_pme", "ss_pme";
+ clocks = <&hsion_usbc_non_sticky_clk>, <&hsion_usbc_sticky_clk>;
+ clock-names = "non_sticky", "sticky";
+ resets = <&hsion_resets_usbc_non_sticky>, <&hsion_resets_usbc_sticky>,
+ <&hsion_resets_usb_drd_bus>, <&hsion_resets_usb_top>;
+ reset-names = "non_sticky", "sticky", "drd_bus", "top";
+ power-domains = <&hsio_n_usb_psw>, <&hsio_n_usb>;
+ power-domain-names = "psw", "top";
+ phys = <&usb_phy 0>;
+ phy-names = "usb2-phy";
+ snps,quirk-frame-length-adjustment = <0x20>;
+ snps,gfladj-refclk-lpm-sel-quirk;
+ snps,incr-burst-type-adjustment = <4>;
+ };
+ };
+...
--
2.51.0.858.gf9c4a03a3a-goog