[PATCH v5 1/2] dt-bindings: usb: dwc3: Document Renesas R-Car Gen5 DWC3 xHCI USB controller
From: Marek Vasut <marek.vasut+renesas@mailbox.org>
Date: 2026-08-28 18:24:26
Also in:
linux-renesas-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
The Renesas R-Car Gen5 SoC contains multiple instances of DWC3 USB
controller with glue logic wrapper around them. Document the glue
logic and DWC3 controller.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
---
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-usb@vger.kernel.org
---
V2: Rework to use flat bindings for generic plat driver
V3: - Support one or two PHYs to correctly describe the hardware
- Make maximum-speed optional
V4: - Use ref: snps,dwc3-common.yaml and drop generic dr_mode/maximum-speed/phys/phy-names
- Switch to unevaluatedProperties: false
V5: - Limit maximum PHY count to 2
---
.../bindings/usb/renesas,rcar-gen5-dwc3.yaml | 76 +++++++++++++++++++
1 file changed, 76 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml
diff --git a/Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml b/Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml
new file mode 100644
index 0000000000000..c8a770d7e0241
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml@@ -0,0 +1,76 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/usb/renesas,rcar-gen5-dwc3.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas R-Car Gen5 DWC3 xHCI USB controller + +maintainers: + - Marek Vasut <marek.vasut+renesas@mailbox.org> + +allOf: + - $ref: snps,dwc3-common.yaml# + +properties: + compatible: + items: + - const: renesas,r8a78000-dwc3 + - const: renesas,rcar-gen5-dwc3 + + reg: + maxItems: 2 + + reg-names: + items: + - const: dwc3 + - const: glue + + clocks: + maxItems: 1 + + interrupts: + maxItems: 1 + + phys: + minItems: 1 + maxItems: 2 + + phy-names: + minItems: 1 + maxItems: 2 + + power-domains: + maxItems: 1 + + resets: + maxItems: 1 + +required: + - compatible + - reg + - reg-names + - clocks + - interrupts + - phys + - phy-names + - power-domains + - resets + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + usb@c8800000 { + compatible = "renesas,r8a78000-dwc3", "renesas,rcar-gen5-dwc3"; + reg = <0xc8800000 0x100000>, <0xc9c54000 0x2000>; + reg-names = "dwc3", "glue"; + clocks = <&scmi_clk 336>; + interrupts = <GIC_SPI 795 IRQ_TYPE_LEVEL_HIGH>; + phys = <&usb30_phy>, <&mp_phy 2>; + phy-names = "usb2-phy", "usb3-phy"; + power-domains = <&scmi_devpd 16>; + resets = <&scmi_reset 336>; + };
--
2.53.0