[PATCH 3/3] dt-bindings: usb: add documentation for aspeed udc

Neal Liu
2022-05-13T06:59:57Z

Add device tree binding documentation for the Aspeed USB2.0 Device
Controller.

Signed-off-by: Neal Liu <neal_liu@aspeedtech.com>
---
.../devicetree/bindings/usb/aspeed,udc.yaml | 52 +++++++++++++++++++
1 file changed, 52 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/aspeed,udc.yaml

diff --git a/Documentation/devicetree/bindings/usb/aspeed,udc.yaml b/Documentation/devicetree/bindings/usb/aspeed,udc.yaml
new file mode 100644
index 000000000000..d1d2f77d1c54
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/aspeed,udc.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2020 Facebook Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/aspeed,udc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED USB 2.0 Device Controller
+
+maintainers:
+ - Neal Liu <neal_liu@aspeedtech.com>
+
+description: |+
+ The ASPEED USB 2.0 Device Controller implements 1 control endpoint and
+ 4 generic endpoints for AST260x.
+
+ Supports independent DMA channel for each generic endpoint.
+ Supports 32/256 stages descriptor mode for all generic endpoints.
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2600-udc
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/aspeed-clock.h>
+ udc: udc@1e6a2000 {
+ compatible = "aspeed,ast2600-udc";
+ reg = <0x1e6a2000 0x300>;
+ interrupts = <9>;
+ clocks = <&syscon ASPEED_CLK_GATE_USBPORT2CLK>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usb2bd_default>;
+ };
--
2.25.1