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Message-Id: <20200227230507.8682-8-rentao.bupt@gmail.com>
Date: Thu, 27 Feb 2020 15:05:07 -0800
From: rentao.bupt@...il.com
To: Felipe Balbi <balbi@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Joel Stanley <joel@....id.au>,
Andrew Jeffery <andrew@...id.au>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Chunfeng Yun <chunfeng.yun@...iatek.com>,
Colin Ian King <colin.king@...onical.com>,
Stephen Boyd <swboyd@...omium.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>, linux-usb@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-aspeed@...ts.ozlabs.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org,
taoren@...com
Cc: Tao Ren <rentao.bupt@...il.com>
Subject: [PATCH v5 7/7] dt-bindings: usb: add documentation for aspeed usb-vhub
From: Tao Ren <rentao.bupt@...il.com>
Add device tree binding documentation for the Aspeed USB 2.0 Virtual HUb
Controller.
Signed-off-by: Tao Ren <rentao.bupt@...il.com>
Reviewed-by: Joel Stanley <joel@....id.au>
---
Changes in v5:
- updated maintainer to Ben.
- refined patch description per Joel's suggestion.
No change in v2/v3/v4:
- the patch is added to the patch series since v4.
.../bindings/usb/aspeed,usb-vhub.yaml | 71 +++++++++++++++++++
1 file changed, 71 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
diff --git a/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml b/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
new file mode 100644
index 000000000000..b8b1700c2423
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (c) 2020 Facebook Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/aspeed,usb-vhub.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED USB 2.0 Virtual Hub Controller
+
+maintainers:
+ - Benjamin Herrenschmidt <benh@...nel.crashing.org>
+
+description: |+
+ The ASPEED USB 2.0 Virtual Hub Controller implements 1 set of USB Hub
+ register and several sets of Device and Endpoint registers to support
+ the Virtual Hub's downstream USB devices.
+
+ Supported number of devices and endpoints vary depending on hardware
+ revisions. AST2400 and AST2500 Virtual Hub supports 5 downstream devices
+ and 15 generic endpoints, while AST2600 Virtual Hub supports 7 downstream
+ devices and 21 generic endpoints.
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2400-usb-vhub
+ - aspeed,ast2500-usb-vhub
+ - aspeed,ast2600-usb-vhub
+
+ reg:
+ maxItems: 1
+ description: Common configuration registers
+
+ clocks:
+ maxItems: 1
+ description: The Virtual Hub Controller clock gate
+
+ interrupts:
+ maxItems: 1
+
+ aspeed,vhub-downstream-ports:
+ description: Number of downstream ports supported by the Virtual Hub
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+
+ aspeed,vhub-generic-endpoints:
+ description: Number of generic endpoints supported by the Virtual Hub
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - interrupts
+ - aspeed,vhub-downstream-ports
+ - aspeed,vhub-generic-endpoints
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/aspeed-clock.h>
+ vhub: usb-vhub@...a0000 {
+ compatible = "aspeed,ast2500-usb-vhub";
+ reg = <0x1e6a0000 0x300>;
+ interrupts = <5>;
+ clocks = <&syscon ASPEED_CLK_GATE_USBPORT1CLK>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usb2ad_default>;
+ };
--
2.17.1
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