Documentation for Embedded USB Debugger (EUD) device tree bindings. Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@xxxxxxxxxxxxxx> Signed-off-by: Prakruthi Deepak Heragu <pheragu@xxxxxxxxxxxxxx> Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@xxxxxxxxxxxxxx> --- .../devicetree/bindings/soc/qcom/qcom,msm-eud.txt | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,msm-eud.txt diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,msm-eud.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,msm-eud.txt new file mode 100644 index 0000000..57476ce --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,msm-eud.txt @@ -0,0 +1,43 @@ +* Qualcomm Technologies Inc Embedded USB Debugger (EUD) + +The EUD (Embedded USB Debugger) is a mini-USB hub implemented +on chip to support the USB-based debug and trace capabilities. + +Required properties: + + - compatible: Should be "qcom,msm-eud" + - interrupts: Interrupt number + - reg: Should be address and size of EUD register space + +EUD notifies clients for VBUS attach/detach and charger enable/disable +events. The link between event consumer(i.e.USB controller for vbus +attach/detach event) and EUD is established via a directed graph. EUD +act as an output link and clients of EUD as input link of this directed +graph. Events flows through the directed graph only during debug mode. + +An example for EUD device node: + + eud: qcom,msm-eud@88e0000 { + compatible = "qcom,msm-eud"; + interrupts = <GIC_SPI 492 IRQ_TYPE_LEVEL_HIGH>; + reg = <0x88e0000 0x4000>; + usb_con: connector { + compatible = "usb-c-connector"; + label = "USB-C"; + port { + eud_usb_output: endpoint { + remote-endpoint = <&eud_usb3_input>; + }; + }; + }; + }; + +An example for EUD client: + + usb3 { + port { + eud_usb3_input: endpoint { + remote-endpoint = <&eud_usb_output>; + }; + }; + }; -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.