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dt-bindings: usb: Add binding for Via lab VL817 hub controller
The VIA Lab VL817 is a USB 3.1 Gen 1 hub and USB 2.0 hub controller that features 4 downstream ports and 1 otg, with an internal 5V regulator and has 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. Add combo of USB 2.0 and USB 3.0 root hub using peer-hub. Signed-off-by: Anand Moon <linux.amoon@gmail.com> Link: https://lore.kernel.org/r/20230118044418.875-7-linux.amoon@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Documentation/devicetree/bindings/usb/vialab,vl817.yaml
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Documentation/devicetree/bindings/usb/vialab,vl817.yaml
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# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/usb/vialab,vl817.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Via labs VL817 USB 3.1 hub controller
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maintainers:
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- Anand Moon <linux.amoon@gmail.com>
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allOf:
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- $ref: usb-device.yaml#
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properties:
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compatible:
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items:
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- enum:
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- usb2109,2817
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- usb2109,817
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reg: true
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reset-gpios:
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description: GPIO controlling the RESET# pin.
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vdd-supply:
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description:
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phandle to the regulator that provides power to the hub.
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peer-hub:
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$ref: '/schemas/types.yaml#/definitions/phandle'
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description:
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phandle to the peer hub on the controller.
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required:
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- peer-hub
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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usb {
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dr_mode = "host";
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#address-cells = <1>;
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#size-cells = <0>;
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/* 2.0 hub on port 1 */
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hub_2_0: hub@1 {
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compatible = "usb2109,2817";
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reg = <1>;
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vdd-supply = <&vcc_5v>;
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peer-hub = <&hub_3_0>;
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reset-gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
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};
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/* 3.1 hub on port 4 */
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hub_3_0: hub@2 {
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compatible = "usb2109,817";
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reg = <2>;
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vdd-supply = <&vcc_5v>;
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peer-hub = <&hub_2_0>;
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reset-gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
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};
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};
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