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The WCH CH334/CH335[0] are USB2.0 protocol compliant 4-port USB HUB controller chips, supporting USB2.0 high-speed and full-speed for upstream ports, and USB2.0 high-speed 480Mbps, full-speed 12Mbps and low-speed 1.5Mbps for downstream ports, supporting not only low-cost STT mode (single TT schedules 4 downstream ports in time share), but also supports high performance MTT mode (4 TTs each corresponding to 1 port, concurrent processing). Add a device tree binding for it. [0]: https://www.wch-ic.com/downloads/CH334DS1_PDF.html Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20260113095827.115-2-kernel@airkyi.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
1.3 KiB
YAML
65 lines
1.3 KiB
YAML
# 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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$id: http://devicetree.org/schemas/usb/wch,ch334.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: WCH CH334/CH335 USB 2.0 Hub Controller
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maintainers:
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- Chaoyi Chen <kernel@airkyi.com>
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allOf:
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- $ref: usb-hub.yaml#
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properties:
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compatible:
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enum:
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- usb1a86,8091
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reg: true
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reset-gpios:
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description: GPIO controlling the RESET# pin.
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vdd33-supply:
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description:
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The regulator that provides 3.3V core power to the hub.
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v5-supply:
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description:
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The regulator that provides 3.3V or 5V power to the hub.
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ports:
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$ref: /schemas/graph.yaml#/properties/ports
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patternProperties:
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'^port@':
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$ref: /schemas/graph.yaml#/properties/port
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properties:
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reg:
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minimum: 1
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maximum: 4
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required:
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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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#address-cells = <1>;
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#size-cells = <0>;
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hub: hub@1 {
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compatible = "usb1a86,8091";
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reg = <1>;
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reset-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
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v5-supply = <&vcc_3v3>;
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vdd33-supply = <&vcc_3v3>;
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};
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};
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