[PATCH 3/7] dt-bindings: usb: add SpacemiT K1 DWC3 glue

Ze Huang
2025-04-07T15:12:36Z

Add support for SpacemiT DWC3 glue driver, which manages interrupt,
reset and clock resource.

Signed-off-by: Ze Huang <huangze@whut.edu.cn>
---
.../devicetree/bindings/usb/spacemit,k1-dwc3.yaml | 78 ++++++++++++++++++++++
1 file changed, 78 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/spacemit,k1-dwc3.yaml b/Documentation/devicetree/bindings/usb/spacemit,k1-dwc3.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..40ce3fd1330d5f371ec69155c237e10a65a9d8f4
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/spacemit,k1-dwc3.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/spacemit,k1-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT K1 SuperSpeed DWC3 USB SoC Controller Glue
+
+maintainers:
+ - Ze Huang <huangze@whut.edu.cn>
+
+properties:
+ compatible:
+ const: spacemit,k1-dwc3
+
+ ranges:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ interconnects:
+ description:
+ On SpacemiT K1, USB performs DMA through bus other than parent DT node.
+ The 'interconnects' property explicitly describes this path, ensuring
+ correct address translation.
+
+ interconnect-names:
+ const: dma-mem
+
+ # optional
+ vbus-supply:
+ description: A phandle to the regulator supplying the VBUS voltage.
+
+patternProperties:
+ '^usb@':
+ $ref: snps,dwc3.yaml#
+
+additionalProperties: false
+
+required:
+ - compatible
+ - ranges
+ - clocks
+ - resets
+ - interrupts
+ - interconnects
+ - interconnect-names
+
+examples:
+ - |
+ usb@c0a00000 {
+ compatible = "spacemit,k1-dwc3";
+ clocks = <&syscon_apmu 16>;
+ interrupts = <149>;
+ interconnects = <&dram_range0>;
+ interconnect-names = "dma-mem";
+ ranges = <0x0 0xc0a00000 0x10000>;
+ resets = <&syscon_apmu 8>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ status = "disabled";
+
+ usb@0 {
+ compatible = "snps,dwc3";
+ reg = <0x0 0x0 0x0 0x10000>;
+ interrupt-parent = <&plic>;
+ interrupts = <125>;
+ phys = <&usb_phy2>, <&usb_phy3 2>;
+ phy-names = "usb2-phy", "usb3-phy";
+ };
+ };

--
2.49.0