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It's used to support dual role switch via GPIO when use Type-B receptacle, typically the USB ID pin is connected to an input GPIO, and also used to enable/disable device when the USB Vbus pin is connected to an input GPIO. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/1567070558-29417-4-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
31 lines
836 B
Plaintext
31 lines
836 B
Plaintext
USB GPIO Based Connection Detection
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This is typically used to switch dual role mode from the USB ID pin connected
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to an input GPIO, and also used to enable/disable device mode from the USB
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Vbus pin connected to an input GPIO.
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Required properties:
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- compatible : should include "gpio-usb-b-connector" and "usb-b-connector".
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- id-gpios, vbus-gpios : input gpios, either one of them must be present,
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and both can be present as well.
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see connector/usb-connector.txt
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Optional properties:
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- vbus-supply : can be present if needed when supports dual role mode.
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see connector/usb-connector.txt
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- Sub-nodes:
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- port : can be present.
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see graph.txt
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Example:
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&mtu3 {
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connector {
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compatible = "gpio-usb-b-connector", "usb-b-connector";
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type = "micro";
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id-gpios = <&pio 12 GPIO_ACTIVE_HIGH>;
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vbus-supply = <&usb_p0_vbus>;
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};
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};
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