27 lines
988 B
Plaintext
27 lines
988 B
Plaintext
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GPIO USB VBUS Detection
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Discrete USB VBUS detection circuitry can be connected to the AP or PMICs.
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Such circuits can be used to detect the when a USB cable is connected to
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an upstream port such as a standard host or a wall charger by detecting
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the presence of VBUS voltage. The GPIO can be configured to trigger an
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interrupt, and allow the software driver to in turn notify the USB
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subsytem using the power_supply framework.
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Required Properties:
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- compatible: must be "qcom,gpio-usbdetect"
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- interrupts: an interrupt triggered by the output of the detection circuit
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- interrupt-names: must be "vbus_det_irq"
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Optional Properties:
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- vin-supply: phandle to a regulator that powers this circuit, if needed
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Example:
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usb_detect {
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compatible = "qcom,gpio-usbdetect";
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interrupt-parent = <&spmi_bus>;
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interrupts = <0x0 0xCA 0x0>; /* PMA8084 GPIO 11 */
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interrupt-names = "vbus_det_irq";
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vin-supply = <&vbus_det_reg>;
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};
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