linux-kernel - [PATCH v2 1/2] dt-bindings: usb: Add binding for onboard USB hubs

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Date:   Thu, 17 Sep 2020 11:46:21 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Douglas Anderson <dianders@...omium.org>,
        Alan Stern <stern@...land.harvard.edu>,
        linux-usb@...r.kernel.org, Bastien Nocera <hadess@...ess.net>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        devicetree@...r.kernel.org,
        Ravi Chandra Sadineni <ravisadineni@...omium.org>,
        Peter Chen <peter.chen@....com>,
        Stephen Boyd <swboyd@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v2 1/2] dt-bindings: usb: Add binding for onboard USB hubs

Onboard USB hubs need to be powered and may require initiaization of
other resources (like GPIOs or clocks) to work properly. This adds
a device tree binding for these hubs.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
---

Changes in v2:
- removed 'wakeup-source' and 'power-off-in-suspend' properties
- consistently use spaces for indentation in example

 .../bindings/usb/onboard_usb_hub.yaml         | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml

diff --git a/Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml b/Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml
new file mode 100644
index 000000000000..66d67aa64e3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/onboard_usb_hub.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Binding for onboard USB hubs
+
+maintainers:
+  - Matthias Kaehlcke <mka@...omium.org>
+
+allOf:
+  - $ref: /schemas/usb/onboard_usb_hub.yaml#
+
+properties:
+  compatible:
+    enum:
+      - onboard-usb-hub
+      - realtek,rts5411
+
+  vdd-supply:
+    description:
+      phandle to the regulator that provides power to the hub.
+
+required:
+  - compatible
+  - vdd-supply
+
+examples:
+  - |
+    usb_hub: usb-hub {
+        compatible = "realtek,rts5411", "onboard-usb-hub";
+        vdd-supply = <&pp3300_hub>;
+    };
+
+    &usb_1_dwc3 {
+        dr_mode = "host";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* 2.0 hub on port 1 */
+        hub@1 {
+            compatible = "usbbda,5411";
+            reg = <1>;
+            hub = <&usb_hub>;
+        };
+
+        /* 3.0 hub on port 2 */
+        hub@2 {
+            compatible = "usbbda,411";
+            reg = <2>;
+            hub = <&usb_hub>;
+        };
+    };
+
+...
-- 
2.28.0.681.g6f77f65b4e-goog