[PATCH v4 1/2] dt-bindings: usb: dwc3: Add Google Tensor G5 DWC3
From: Roy Luo <hidden>
Date: 2025-10-17 23:35:18
Also in:
linux-devicetree, linux-samsung-soc, linux-usb, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest, usb subsystem · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Greg Kroah-Hartman
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 <redacted> --- .../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>; + }; + }; +...
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2.51.0.858.gf9c4a03a3a-goog