linux-kernel - [PATCH v4 1/2] dt-bindings: Documentation for qcom,eud

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Date:   Fri, 31 Jan 2020 10:13:30 +0530
From:   Avaneesh Kumar Dwivedi <akdwived@...eaurora.org>
To:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, ckadabi@...eaurora.org,
        tsoni@...eaurora.org, bryanh@...eaurora.org,
        psodagud@...eaurora.org, rnayak@...eaurora.org,
        satyap@...eaurora.org, pheragu@...eaurora.org,
        Avaneesh Kumar Dwivedi <akdwived@...eaurora.org>
Subject: [PATCH v4 1/2] dt-bindings: Documentation for qcom,eud

Documentation for Embedded USB Debugger (EUD) device tree bindings.

Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@...eaurora.org>
Signed-off-by: Prakruthi Deepak Heragu <pheragu@...eaurora.org>
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@...eaurora.org>
---
 .../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@...0000 {
+		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.