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From: Prakruthi Deepak Heragu <pheragu@codeaurora.org>
To: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, tsoni@codeaurora.org,
	ckadabi@codeaurora.org, bryanh@codeaurora.org,
	psodagud@codeaurora.org, rnayak@codeaurora.org,
	Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>,
	Prakruthi Deepak Heragu <pheragu@codeaurora.org>
Subject: [PATCH v1 1/2] dt-bindings: Documentation for qcom,eud
Date: Thu, 16 Aug 2018 17:05:47 -0700	[thread overview]
Message-ID: <1534464348-8227-2-git-send-email-pheragu@codeaurora.org> (raw)
In-Reply-To: <1534464348-8227-1-git-send-email-pheragu@codeaurora.org>

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

Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>
---
 .../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 = <GIC_SPI 492 IRQ_TYPE_LEVEL_HIGH>;
+		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


  reply	other threads:[~2018-08-17  0:06 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-17  0:05 [PATCH v1 0/2] Add Embedded USB Debugger (EUD) driver Prakruthi Deepak Heragu
2018-08-17  0:05 ` Prakruthi Deepak Heragu [this message]
2018-08-17  0:05 ` [PATCH v1 2/2] " Prakruthi Deepak Heragu
2018-08-17 19:47   ` Trilok Soni
2018-08-20 16:59     ` pheragu
2018-08-31 16:03 ` [PATCH v1 0/2] Add " Trilok Soni

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