Merge "bindings: arm: msm: Add documentation for sdx ipc driver"

bindings/arm/msm/sdx-ext-ipc.txt

@@ -0,0 +1,34 @@
+Modem chipset attached to Application processor
+
+Modem chipset can be connected to an external apss processor. The control
+channel between the two chipsets consists of gpios that can relay the
+state of one subsytem to another. Modem can indicate different events
+(bootup/crash etc.) to AP and can get the same information from AP.
+
+Required Properties:
+- compatible:	"qcom,sdx-ext-ipc".
+
+Optional named gpio properties:
+- qcom,status-out-gpio: gpio to indicate the boot status to remote processor.
+
+- qcom,status-in-gpio: gpio for remote processor to indicate the boot status.
+
+- qcom,status-out2-gpio: gpio to indicate to remote processor that it is in
+		E911 call or doing firmware upgrade.
+
+- qcom,default-policy-nop: Set default policy from PANIC to NOP.
+
+- qcom,wakeup-gpio-out: gpio to wakeup remote AP or modem.
+
+- qcom,wakeup-gpio-in: input gpio to receive wakeup signal from remote AP or
+		modem.
+
+Example:
+	sdx_ext_ipc: qcom,sdx_ext_ipc {
+		compatible = "qcom,sdx-ext-ipc";
+		qcom,status-in-gpio = <&tlmm 64 0x00>;
+		qcom,status-out-gpio = <&tlmm 63 0x00>;
+		qcom,status-out2-gpio = <&tlmm 66 0x00>;
+		qcom,wakeup-gpio-in = <&tlmm 67 0x00>;
+		qcom,wakeup-gpio-out = <&tlmm 68 0x00>;
+	};