linux-kernel - [PATCH v3 3/3] dt-bindings: usb: add documentation for aspeed udc

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Message-ID: <20220518062043.1075360-4-neal_liu@aspeedtech.com>
Date:   Wed, 18 May 2022 14:20:43 +0800
From:   Neal Liu <neal_liu@...eedtech.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Joel Stanley <joel@....id.au>,
        "Andrew Jeffery" <andrew@...id.au>,
        Felipe Balbi <balbi@...nel.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "Li Yang" <leoyang.li@....com>
CC:     Neal Liu <neal_liu@...eedtech.com>,
        <linux-aspeed@...ts.ozlabs.org>, <linux-usb@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>,
        <linaro-mm-sig@...ts.linaro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v3 3/3] dt-bindings: usb: add documentation for aspeed udc

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

Signed-off-by: Neal Liu <neal_liu@...eedtech.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 .../bindings/usb/aspeed,ast2600-udc.yaml      | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/aspeed,ast2600-udc.yaml

diff --git a/Documentation/devicetree/bindings/usb/aspeed,ast2600-udc.yaml b/Documentation/devicetree/bindings/usb/aspeed,ast2600-udc.yaml
new file mode 100644
index 000000000000..c3b6be3d8002
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/aspeed,ast2600-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
+---
+$id: http://devicetree.org/schemas/usb/aspeed,ast2600-udc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED USB 2.0 Device Controller
+
+maintainers:
+  - Neal Liu <neal_liu@...eedtech.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: usb@...a2000 {
+        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