linux-kernel - [PATCH v3 2/6] dt-bindings: usb: Add binding for Genesys Logic GL850G hub controller

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Date:   Tue,  6 Dec 2022 13:52:24 +0800
From:   Icenowy Zheng <uwu@...nowy.me>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Andre Przywara <andre.przywara@....com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, Icenowy Zheng <uwu@...nowy.me>
Subject: [PATCH v3 2/6] dt-bindings: usb: Add binding for Genesys Logic GL850G hub controller

The Genesys Logic GL850G is a USB 2.0 Single TT hub controller that
features 4 downstream ports, an internal 5V-to-3.3V LDO regulator (can
be bypassed) and an external reset pin.

Add a device tree binding for its USB protocol part. The internal LDO is
not covered by this and can just be modelled as a fixed regulator.

Signed-off-by: Icenowy Zheng <uwu@...nowy.me>
---
Changes in v3:
- Re-introduce GPIO flags.
Changes in v2:
- Misc fixes suggested by Krzysztof, including property descriptions,
  single-item "items" and fixing the example's gpio property.
- Fixed $id.

 .../bindings/usb/genesys,gl850g.yaml          | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/genesys,gl850g.yaml

diff --git a/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
new file mode 100644
index 000000000000..a9f831448cca
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/genesys,gl850g.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/genesys,gl850g.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Genesys Logic GL850G USB 2.0 hub controller
+
+maintainers:
+  - Icenowy Zheng <uwu@...nowy.me>
+
+allOf:
+  - $ref: usb-device.yaml#
+
+properties:
+  compatible:
+    enum:
+      - usb5e3,608
+
+  reg: true
+
+  reset-gpios:
+    description: GPIO controlling the RESET# pin.
+
+  vdd-supply:
+    description:
+      the regulator that provides 3.3V core power to the hub.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    usb {
+        dr_mode = "host";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        hub: hub@1 {
+            compatible = "usb5e3,608";
+            reg = <1>;
+            reset-gpios = <&pio 7 2 GPIO_ACTIVE_LOW>;
+        };
+    };
-- 
2.38.1