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

From: Icenowy Zheng
Date: Tue Dec 06 2022 - 00:53:37 EST


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@xxxxxxxxxx>
---
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@xxxxxxxxxx>
+
+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