Merge 179cd890 on remote branch

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>;

	};

                "qcom,cnss-qca6390" for QCA6390 device

                "qcom,cnss-qca6490" for QCA6490 device

                "qcom,cnss-wcn7850" for WCN7850 device

                "qcom,cnss-qcn9000" for QCN9000 device

                "qcom,cnss-qca-converged" for converged QCA devices

  - wlan-en-gpio: WLAN_EN GPIO signal specified by the chip specifications

  - vdd-wlan-supply: phandle to the regulator device tree node

		  that interconnect votes will be maintained irrespective of

		  the CPUSS' state (awake or asleep).

- qcom,power-always-on:

		  Boolean property which indicates that votes for power

		  resources (i.e. regulators, clocks, buses) should

		  always be maintained. This is required when the latency

		  for the SMMU's operation is greatly increased by adding and

		  removing votes for power resources.

** Deprecated properties:

- mmu-masters (deprecated in favour of the generic "iommus" binding) :

			current monitoring(CCM) hardware for battery current

			monitor.

- nvmem-cells:

	Value type: <phandle>

	Definition: phandle pointing to a nvmem-cells node representing the

			sdam registers that has information of ibat scaling range

			factor.When defined, the bcl driver will use it to

			scale ibat current greater than default supported range.

- nvmem-cell-names:

	Value type: <string>

	Definition: Specifies the given nvmem cell name as defined in

			sdam node.

			Documentation/devicetree/bindings/nvmem/nvmem.txt and also

			example below.

Example:

		bcl@4200 {

			compatible = "qcom,bcl-v5";

						"bcl-lvl1";

			qcom,pmic7-threshold;

			qcom,ibat-ccm-hw-support;

			nvmem-cells = <&adc_scaling>;

			nvmem-cell-names = "adc_scaling";

		};

			before attempting a U3 exit handshake.

 - snps,is-utmi-l1-suspend: true when DWC3 asserts output signal

			utmi_l1_suspend_n, false when asserts utmi_sleep_n

 - snps,usb2-gadget-lpm-disable: Indicate if we don't want to enable USB2 HW

	LPM for gadget mode. This is a boolean type property when set the

	disable will be true.

 - snps,hird-threshold: HIRD threshold

 - snps,hsphy_interface: High-Speed PHY interface selection between "utmi" for

   UTMI+ and "ulpi" for ULPI when the DWC_USB3_HSPHY_INTERFACE has value 3.