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From:   Matthias Kaehlcke <mka@chromium.org>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>
Cc:     devicetree@vger.kernel.org, Peter Chen <peter.chen@nxp.com>,
        Stephen Boyd <swboyd@chromium.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Ravi Chandra Sadineni <ravisadineni@chromium.org>,
        Bastien Nocera <hadess@hadess.net>,
        linux-kernel@vger.kernel.org,
        Douglas Anderson <dianders@chromium.org>,
        linux-usb@vger.kernel.org, Krzysztof Kozlowski <krzk@kernel.org>,
        Matthias Kaehlcke <mka@chromium.org>
Subject: [PATCH v5 1/4] dt-bindings: usb: Add binding for discrete onboard USB hubs
Date:   Wed, 10 Feb 2021 09:10:36 -0800
Message-Id: <20210210091015.v5.1.I248292623d3d0f6a4f0c5bc58478ca3c0062b49a@changeid>
In-Reply-To: <20210210171040.684659-1-mka@chromium.org>
References: <20210210171040.684659-1-mka@chromium.org>
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Precedence: bulk

Discrete onboard USB hubs (an example for such a hub is the Realtek
RTS5411) need to be powered and may require initialization 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@chromium.org>
---

Changes in v5:
- updated 'title'
- only use standard USB compatible strings
- deleted 'usb_hub' node
- renamed 'usb_controller' node to 'usb-controller'
- removed labels from USB nodes
- added 'vdd-supply' to USB nodes

Changes in v4:
- none

Changes in v3:
- updated commit message
- removed recursive reference to $self
- adjusted 'compatible' definition to support multiple entries
- changed USB controller phandle to be a node

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         | 49 +++++++++++++++++++
 1 file changed, 49 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..bf4ec52e6c7b
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml
@@ -0,0 +1,49 @@
+# 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 discrete onboard USB hubs
+
+maintainers:
+  - Matthias Kaehlcke <mka@chromium.org>
+
+properties:
+  compatible:
+    items:
+      - enum:
+        - usbbda,5411
+        - usbbda,411
+
+  vdd-supply:
+    description:
+      phandle to the regulator that provides power to the hub.
+
+required:
+  - compatible
+  - vdd-supply
+
+examples:
+  - |
+    usb-controller {
+        dr_mode = "host";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* 2.0 hub on port 1 */
+        hub_2_0: hub@1 {
+            compatible = "usbbda,5411";
+            reg = <1>;
+            vdd-supply = <&pp3300_hub>;
+        };
+
+        /* 3.0 hub on port 2 */
+        hub_3_0: hub@2 {
+            compatible = "usbbda,411";
+            reg = <2>;
+            vdd-supply = <&pp3300_hub>;
+        };
+    };
+
+...
-- 
2.30.0.478.g8a0d178c01-goog