From mboxrd@z Thu Jan 1 00:00:00 1970 From: Prakruthi Deepak Heragu Subject: [PATCH v2 1/2] dt-bindings: Documentation for qcom,eud Date: Tue, 4 Sep 2018 14:34:12 -0700 Message-ID: <1536096853-30473-2-git-send-email-pheragu@codeaurora.org> References: <1536096853-30473-1-git-send-email-pheragu@codeaurora.org> Return-path: In-Reply-To: <1536096853-30473-1-git-send-email-pheragu@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org, ckadabi@codeaurora.org, tsoni@codeaurora.org, rnayak@codeaurora.org, bryanh@codeaurora.org, psodagud@codeaurora.org, Prakruthi Deepak Heragu , Satya Durga Srinivasu Prabhala List-Id: devicetree@vger.kernel.org Documentation for Embedded USB Debugger (EUD) device tree bindings. Signed-off-by: Satya Durga Srinivasu Prabhala Signed-off-by: Prakruthi Deepak Heragu --- .../devicetree/bindings/soc/qcom/qcom,msm-eud.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 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..a03021a --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,msm-eud.txt @@ -0,0 +1,41 @@ +* 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 + +Driver notifies clients for VBUS attach/detach and charger enable/disable +events. The link between client and EUD is established via a directed +graph. EUD driver has one endpoint of the graph link mentioning EUD as an +output link and clients registered for these notifications from the EUD +should have the other endpoint of the graph link as an input link. Each of +these endpoints should contain a 'remote-endpoint' phandle property that +points to the corresponding endpoint in the port of the remote device. + +An example for EUD device node: + + eud: qcom,msm-eud@88e0000 { + compatible = "qcom,msm-eud"; + interrupts = ; + reg = <0x88e0000 0x4000>; + port { + eud_output: endpoint { + remote-endpoint = <&usb3_input>; + }; + }; + }; + +An example for EUD client: + + usb3 { + port { + usb3_input: endpoint { + remote-endpoint = <&eud_output>; + }; + }; + }; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project