Documentation/devicetree/bindings/usb/msm-hsusb.txt - kernel/msm - Gitiles

 MSM SoC HSUSB controllers

 OTG:

 Required properties :
 - compatible : should be "qcom,hsusb-otg"
 - regs : offset and length of the register set in the memory map
 - interrupts: IRQ line
 - interrupt-names: OTG interrupt name(s) referenced in interrupts above
             HSUSB OTG expects "core_irq" which is IRQ line from CORE and
             optional ones are described in next section.
 - qcom,hsusb-otg-phy-type: PHY type can be one of
             1 - Chipidea 45nm PHY
 	    2 - Synopsis 28nm PHY
 - qcom,hsusb-otg-mode: Operational mode. Can be one of
             1 - Peripheral only mode
 	    2 - Host only mode
 	    3 - OTG mode
 	    Based on the mode, OTG driver registers platform devices for
 	    gadget and host.
 - qcom,hsusb-otg-control: OTG control (VBUS and ID notifications)
   can be one of
             1 - PHY control
 	    2 - PMIC control
 	    3 - User control (via debugfs)
 - <supply-name>-supply: handle to the regulator device tree node
          Required "supply-name" is "HSUSB_VDDCX" (when voting for VDDCX) or
          "hsusb_vdd_dig" (when voting for VDDCX Corner voltage),
          "HSUSB_1p8-supply" and "HSUSB_3p3-supply".

 Optional properties :
 - interrupt-names : Optional interrupt resource entries are:
     "async_irq" : Interrupt from HSPHY for asynchronous wakeup events in LPM.
     "pmic_id_irq" : Interrupt from PMIC for external ID pin notification.
 - qcom,hsusb-otg-disable-reset: If present then core is RESET only during
 	    init, otherwise core is RESET for every cable disconnect as well
 - qcom,hsusb-otg-pnoc-errata-fix: If present then workaround for PNOC
 	    performance issue is applied which requires changing the mem-type
 	    attribute via VMIDMT.
 - qcom,hsusb-otg-default-mode: The default USB mode after boot-up.
   Applicable only when OTG is controlled by user. Can be one of
             0 - None. Low power mode
             1 - Peripheral
 	    2 - Host
 - qcom,hsusb-otg-phy-init-seq: PHY configuration sequence. val, reg pairs
   terminate with -1
 - qcom,hsusb-otg-power-budget: VBUS power budget in mA
   0 will be treated as 500mA
 - qcom,hsusb-otg-pclk-src-name: The source of pclk
 - Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for
   below optional properties:
     - qcom,msm_bus,name
     - qcom,msm_bus,num_cases - There are three valid cases for this: NONE, MAX
 		and MIN bandwidth votes. Minimum two cases must be defined for
 		both NONE and MAX votes. If MIN vote is different from NONE VOTE
 		then specify third case for MIN VOTE.
     - qcom,msm_bus,active_only
     - qcom,msm_bus,num_paths
     - qcom,msm_bus,vectors
 - qcom,hsusb-otg-lpm-on-dev-suspend: If present then USB enter to
 	    low power mode upon receiving bus suspend.
 - qcom,hsusb-otg-clk-always-on-workaround: If present then USB core clocks
 	    remain active upon receiving bus suspend and USB cable is connected.
 	    Used for allowing USB to respond for remote wakup.
 - qcom,hsusb-otg-delay-lpm: If present then USB core will wait one second
 	after disconnect before entering low power mode.
 - qcom,hsusb-otg-delay-lpm-hndshk-on-disconnect: If present then USB core will
 	wait for the handshake with the IPA to complete before entering low
 	power mode.
 - <supply-name>-supply: handle to the regulator device tree node.
          Optional "supply-name" is "vbus_otg" to supply vbus in host mode.
 - qcom,vdd-voltage-level: This property must be a list of three integer
 	values (no, min, max) where each value represents either a voltage
 	in microvolts or a value corresponding to voltage corner.
 - qcom,dp-manual-pullup: If present, vbus is not routed to USB controller/phy
 	and controller driver therefore enables pull-up explicitly before
 	starting controller using usbcmd run/stop bit.
 - qcom,usb2-enable-hsphy2: If present then USB2 controller is connected to 2nd
 	HSPHY.
 - qcom,hsusb-log2-itc: value of 2^(log2_itc-1) will be used as the
 	interrupt threshold (ITC), when log2_itc is between 1 to 7.
 - qcom,hsusb-l1-supported: If present, the device supports l1 (Link power
 	management).
 - qcom,no-selective-suspend: If present selective suspend is disabled on hub ports.
 - qcom,hsusb-otg-dpsehv-int: If present, indicates mpm interrupt to be configured
 	for detection of dp line transition during VDD minimization.
 - qcom,hsusb-otg-dmsehv-int: If present, indicates mpm interrupt to be configured
 	for detection of dm line transition during VDD minimization.
 - qcom,ahb-async-bridge-bypass: If present, indicates that enable AHB2AHB By Pass
 	mode with device controller for better throughput. With this mode, USB Core
 	runs using PNOC clock and synchronous to it. Hence it is must to have proper
 	"qcom,msm_bus,vectors" to have high bus frequency. User shouldn't try to
 	enable this feature without proper bus voting.

 Example HSUSB OTG controller device node :
 	usb@f9690000 {
 		compatible = "qcom,hsusb-otg";
 		reg = <0xf9690000 0x400>;
 		interrupts = <134>;
 		interrupt-names = "core_irq";

 		qcom,hsusb-otg-phy-type = <2>;
 		qcom,hsusb-otg-mode = <1>;
 		qcom,hsusb-otg-otg-control = <1>;
 		qcom,hsusb-otg-disable-reset;
 		qcom,hsusb-otg-pnoc-errata-fix;
 		qcom,hsusb-otg-default-mode = <2>;
 		qcom,hsusb-otg-phy-init-seq = <0x01 0x90 0xffffffff>;
 		qcom,hsusb-otg-power-budget = <500>;
 		qcom,hsusb-otg-pclk-src-name = "dfab_usb_clk";
 		qcom,hsusb-otg-lpm-on-dev-suspend;
 		qcom,hsusb-otg-clk-always-on-workaround;
 		hsusb_vdd_dig-supply = <&pm8226_s1_corner>;
                 HSUSB_1p8-supply = <&pm8226_l10>;
                 HSUSB_3p3-supply = <&pm8226_l20>;
 		qcom,vdd-voltage-level = <1 5 7>;
 		qcom,dp-manual-pullup;
 		qcom,hsusb-otg-dpsehv-int = <49>;
 		qcom,hsusb-otg-dmsehv-int = <58>;
 		qcom,msm_bus,name = "usb2";
 		qcom,msm_bus,num_cases = <2>;
 		qcom,msm_bus,active_only = <0>;
 		qcom,msm_bus,num_paths = <1>;
 		qcom,msm_bus,vectors =
 				<87 512 0 0>,
 				<87 512 60000000 960000000>;
 	};

 MSM HSUSB EHCI controller

 Required properties :
 - compatible : should be "qcom,ehci-host"
 - reg : offset and length of the register set in the memory map
 - interrupts: IRQ lines used by this controller
 - interrupt-names : Required interrupt resource entries are:
             HSUSB EHCI expects "core_irq" and optionally "async_irq".
 - <supply-name>-supply: handle to the regulator device tree node
   Required "supply-name" is either "hsusb_vdd_dig" or "HSUSB_VDDCX"
   "HSUSB_1p8-supply" "HSUSB_3p3-supply".
 - qcom,usb2-power-budget: maximum vbus power (in mA) that can be provided.

 Optional properties :
 - qcom,usb2-enable-hsphy2: If present, select second PHY for USB operation.
 - qcom,resume-gpio: if present then peripheral connected to usb controller
   cannot wakeup from XO shutdown using in-band usb bus resume. Use resume
   gpio to wakeup peripheral.
 - qcom,vdd-voltage-level: This property must be a list of five integer
   values (no, 0.5vsuspend, 0.75suspend, min, max) where each value respresents
   either a voltage in microvolts or a value corresponding to voltage corner.
   First value represents value to vote when USB is not at all active, second
   value represents value to vote when target is not connected to dock during low
   power mode, third value represents vlaue to vote when target is connected to dock
   and no peripheral connected over dock during low power mode, fourth value represents
   minimum value to vote when USB is operational, fifth item represents maximum value
   to vote for USB is operational.

 Example MSM HSUSB EHCI controller device node :
 	ehci: qcom,ehci-host@f9a55000 {
 		compatible = "qcom,ehci-host";
 		reg = <0xf9a55000 0x400>;
 		interrupts = <0 134 0>, <0 140 0>;
 		interrupt-names = "core_irq", "async_irq";
 		hsusb_vdd_dig-supply = <&pm8841_s2_corner>;
 		HSUSB_1p8-supply = <&pm8941_l6>;
 		HSUSB_3p3-supply = <&pm8941_l24>;
 		qcom,usb2-enable-hsphy2;
 		qcom,usb2-power-budget = <500>;
 		qcom,vdd-voltage-level = <1 2 3 5 7>;
 	};

 ANDROID USB:

 Required properties:
 - compatible: should be "qcom,android-usb"

 Optional properties :
 - reg  : offset and length of memory region that is used by device to
   update USB PID and serial numbers used by bootloader in DLOAD mode.
 - qcom,android-usb-swfi-latency : value to be used by device to vote
   for DMA latency in microsecs.
 - qcom,android-usb-cdrom : if this property is present then device creates
   a new LUN as CD-ROM
 - qcom,android-usb-internal-ums : if this property is present then device
   creates a new LUN as internal usb mass storage.
 - qcom,streaming-func : add list of usb function name. If mention usb function
   is being enable as part of USB composition, streaming mode is enable with
   usb device controller to get better throughput. NOTE: Inverted CRC and
   turnaround timeout is observed on enabling streaming. Hence it is required
   to see these errors and number of erros on enabling this at USB level to make
   final decision to enable this feature or not.
 Example Android USB device node :
 	android_usb@fc42b0c8 {
 		compatible = "qcom,android-usb";
 		reg = <0xfc42b0c8 0xc8>;
 		qcom,android-usb-swfi-latency = <1>;
 		qcom,streaming-func = "rndis","mtp";
 	};


 BAM:

 Required properties:
 - compatible: should be "qcom,usb-bam-msm"
 - reg  : pairs of physical base addresses and region sizes
             of all the memory mapped BAM devices present
 - reg-names : Register region name(s), in 1-1 correspondence with the
 	    registers in 'reg'. This list should contain at least as many names
             as the number of unique values given in both 'usb-active-bam' and
             all the subnodes' 'usb-bam-type' properties.

             If SSUSB_BAM is used, "ssusb" should be present.
             If HSUSB_BAM is used, "hsusb" should be present.
             If HSIC_BAM is used, "hsic" should be present.

             If a QSCRATCH RAM1 register is designated for providing USB3
             private memory to use as a BAM FIFO, specify "qscratch_ram1_reg".
 - interrupts: IRQ lines for BAM devices
 - interrupt-names: BAM interrupt name(s), in 1-1 correspondence with
             'interrupts' above.

             If SSUSB_BAM is used, "ssusb" should be present.
             If HSUSB_BAM is used, "hsusb" should be present.
             If HSIC_BAM is used, "hsic" should be present.
 - qcom,usb-bam-num-pipes: max number of pipes that can be used

 Optional properties:
 - qcom,usb-bam-fifo-baseaddr: base address for bam pipe's data and descriptor
   fifos. This can be on chip memory (ocimem) or usb private memory. This
   property is required if sub-node's mem-type is ocimem or usb private mem.

 A number of USB BAM pipe parameters are represented as sub-nodes:

 Subnode Required:
 - label: a string describing uniquely the usb bam pipe. The string can be
   constracted as follows: <core>-<peer>-<direction>-<pipe num>.
 	core options: hsusb, ssusb/dwc3, hsic
 	peer options: qdss, ipa, a2
 	direction options: in (from peer to usb), out (from usb to peer)
 	pipe num options: 0..127
 - qcom,usb-bam-mem-type: Type of memory used by this PIPE. Can be one of
             0 - Uses SPS's dedicated pipe memory
             1 - USB's private memory residing @ 'qcom,usb-bam-fifo-baseaddr'
             2 - System RAM allocated by driver
 	    3 - OCI memory residing @ 'qcom,usb-bam-fifo-baseaddr'
 - qcom,bam-type: BAM type can be one of
 	0 - SSUSB_BAM
 	1 - HSUSB_BAM
 	2 - HSIC_BAM
 - qcom,dir: pipe direction
 	0 - from usb (out)
 	1 - to usb (in)
 - qcom,pipe-num: pipe number
 - qcom,peer-bam: peer BAM can be one of
 	0 - A2_P_BAM
 	1 - QDSS_P_BAM
 	2 - IPA_P_BAM
 - qcom,data-fifo-size: data fifo size
 - qcom,descriptor-fifo-size: descriptor fifo size

 Optional Properties for Subnode:
 - qcom,reset-bam-on-connect: If present then BAM is RESET before connecting
   pipe. This may be required if BAM peripheral is also reset before connect.
 - qcom,dst-bam-physical-address: destination BAM physical address
 - qcom,dst-bam-pipe-index: destination BAM pipe index
 - qcom,src-bam-physical-address: source BAM physical address
 - qcom,src-bam-pipe-index: source BAM pipe index
 - qcom,data-fifo-offset: data fifo offset address
 - qcom,descriptor-fifo-offset: descriptor fifo offset address

 Optional properties :
 - qcom,ignore-core-reset-ack: If present then BAM ignores ACK from USB core
 	    while performing PIPE RESET
 - qcom,disable-clk-gating: If present then disable BAM clock gating.

 Example USB BAM controller device node:

 	qcom,usbbam@f9a44000 {
 		compatible = "qcom,usb-bam-msm";
 		reg = <0xf9a44000 0x11000>;
 		reg-names = "hsusb";
 		interrupts = <0 135 0>;
 		interrupt-names = "hsusb";
 		qcom,usb-bam-num-pipes = <16>;
 		qcom,ignore-core-reset-ack;
 		qcom,disable-clk-gating;

 		qcom,pipe0 {
 			label = "hsusb-ipa-out-0";
 			qcom,usb-bam-mem-type = <0>;
 			qcom,bam-type = <1>;
 			qcom,dir = <0>;
 			qcom,pipe-num = <0>;
 			qcom,peer-bam = <2>;
 			qcom,src-bam-physical-address = <0xf9a44000>;
 			qcom,src-bam-pipe-index = <1>;
 			qcom,data-fifo-offset = <0x2200>;
 			qcom,data-fifo-size = <0x1e00>;
 			qcom,descriptor-fifo-offset = <0x2100>;
 			qcom,descriptor-fifo-size = <0x100>;
 		};
 		qcom,pipe1 {
 			label = "hsusb-ipa-in-0";
 			qcom,usb-bam-mem-type = <0>;
 			qcom,bam-type = <1>;
 			qcom,dir = <1>;
 			qcom,pipe-num = <0>;
 			qcom,peer-bam = <2>;
 			qcom,dst-bam-physical-address = <0xf9a44000>;
 			qcom,dst-bam-pipe-index = <0>;
 			qcom,data-fifo-offset = <0x300>;
 			qcom,data-fifo-size = <0x1e00>;
 			qcom,descriptor-fifo-offset = <0>;
 			qcom,descriptor-fifo-size = <0x300>;
 		};
 	};
	MSM SoC HSUSB controllers

	OTG:

	Required properties :
	- compatible : should be "qcom,hsusb-otg"
	- regs : offset and length of the register set in the memory map
	- interrupts: IRQ line
	- interrupt-names: OTG interrupt name(s) referenced in interrupts above
	HSUSB OTG expects "core_irq" which is IRQ line from CORE and
	optional ones are described in next section.
	- qcom,hsusb-otg-phy-type: PHY type can be one of
	1 - Chipidea 45nm PHY
	2 - Synopsis 28nm PHY
	- qcom,hsusb-otg-mode: Operational mode. Can be one of
	1 - Peripheral only mode
	2 - Host only mode
	3 - OTG mode
	Based on the mode, OTG driver registers platform devices for
	gadget and host.
	- qcom,hsusb-otg-control: OTG control (VBUS and ID notifications)
	can be one of
	1 - PHY control
	2 - PMIC control
	3 - User control (via debugfs)
	- <supply-name>-supply: handle to the regulator device tree node
	Required "supply-name" is "HSUSB_VDDCX" (when voting for VDDCX) or
	"hsusb_vdd_dig" (when voting for VDDCX Corner voltage),
	"HSUSB_1p8-supply" and "HSUSB_3p3-supply".

	Optional properties :
	- interrupt-names : Optional interrupt resource entries are:
	"async_irq" : Interrupt from HSPHY for asynchronous wakeup events in LPM.
	"pmic_id_irq" : Interrupt from PMIC for external ID pin notification.
	- qcom,hsusb-otg-disable-reset: If present then core is RESET only during
	init, otherwise core is RESET for every cable disconnect as well
	- qcom,hsusb-otg-pnoc-errata-fix: If present then workaround for PNOC
	performance issue is applied which requires changing the mem-type
	attribute via VMIDMT.
	- qcom,hsusb-otg-default-mode: The default USB mode after boot-up.
	Applicable only when OTG is controlled by user. Can be one of
	0 - None. Low power mode
	1 - Peripheral
	2 - Host
	- qcom,hsusb-otg-phy-init-seq: PHY configuration sequence. val, reg pairs
	terminate with -1
	- qcom,hsusb-otg-power-budget: VBUS power budget in mA
	0 will be treated as 500mA
	- qcom,hsusb-otg-pclk-src-name: The source of pclk
	- Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for
	below optional properties:
	- qcom,msm_bus,name
	- qcom,msm_bus,num_cases - There are three valid cases for this: NONE, MAX
	and MIN bandwidth votes. Minimum two cases must be defined for
	both NONE and MAX votes. If MIN vote is different from NONE VOTE
	then specify third case for MIN VOTE.
	- qcom,msm_bus,active_only
	- qcom,msm_bus,num_paths
	- qcom,msm_bus,vectors
	- qcom,hsusb-otg-lpm-on-dev-suspend: If present then USB enter to
	low power mode upon receiving bus suspend.
	- qcom,hsusb-otg-clk-always-on-workaround: If present then USB core clocks
	remain active upon receiving bus suspend and USB cable is connected.
	Used for allowing USB to respond for remote wakup.
	- qcom,hsusb-otg-delay-lpm: If present then USB core will wait one second
	after disconnect before entering low power mode.
	- qcom,hsusb-otg-delay-lpm-hndshk-on-disconnect: If present then USB core will
	wait for the handshake with the IPA to complete before entering low
	power mode.
	- <supply-name>-supply: handle to the regulator device tree node.
	Optional "supply-name" is "vbus_otg" to supply vbus in host mode.
	- qcom,vdd-voltage-level: This property must be a list of three integer
	values (no, min, max) where each value represents either a voltage
	in microvolts or a value corresponding to voltage corner.
	- qcom,dp-manual-pullup: If present, vbus is not routed to USB controller/phy
	and controller driver therefore enables pull-up explicitly before
	starting controller using usbcmd run/stop bit.
	- qcom,usb2-enable-hsphy2: If present then USB2 controller is connected to 2nd
	HSPHY.
	- qcom,hsusb-log2-itc: value of 2^(log2_itc-1) will be used as the
	interrupt threshold (ITC), when log2_itc is between 1 to 7.
	- qcom,hsusb-l1-supported: If present, the device supports l1 (Link power
	management).
	- qcom,no-selective-suspend: If present selective suspend is disabled on hub ports.
	- qcom,hsusb-otg-dpsehv-int: If present, indicates mpm interrupt to be configured
	for detection of dp line transition during VDD minimization.
	- qcom,hsusb-otg-dmsehv-int: If present, indicates mpm interrupt to be configured
	for detection of dm line transition during VDD minimization.
	- qcom,ahb-async-bridge-bypass: If present, indicates that enable AHB2AHB By Pass
	mode with device controller for better throughput. With this mode, USB Core
	runs using PNOC clock and synchronous to it. Hence it is must to have proper
	"qcom,msm_bus,vectors" to have high bus frequency. User shouldn't try to
	enable this feature without proper bus voting.

	Example HSUSB OTG controller device node :
	usb@f9690000 {
	compatible = "qcom,hsusb-otg";
	reg = <0xf9690000 0x400>;
	interrupts = <134>;
	interrupt-names = "core_irq";

	qcom,hsusb-otg-phy-type = <2>;
	qcom,hsusb-otg-mode = <1>;
	qcom,hsusb-otg-otg-control = <1>;
	qcom,hsusb-otg-disable-reset;
	qcom,hsusb-otg-pnoc-errata-fix;
	qcom,hsusb-otg-default-mode = <2>;
	qcom,hsusb-otg-phy-init-seq = <0x01 0x90 0xffffffff>;
	qcom,hsusb-otg-power-budget = <500>;
	qcom,hsusb-otg-pclk-src-name = "dfab_usb_clk";
	qcom,hsusb-otg-lpm-on-dev-suspend;
	qcom,hsusb-otg-clk-always-on-workaround;
	hsusb_vdd_dig-supply = <&pm8226_s1_corner>;
	HSUSB_1p8-supply = <&pm8226_l10>;
	HSUSB_3p3-supply = <&pm8226_l20>;
	qcom,vdd-voltage-level = <1 5 7>;
	qcom,dp-manual-pullup;
	qcom,hsusb-otg-dpsehv-int = <49>;
	qcom,hsusb-otg-dmsehv-int = <58>;
	qcom,msm_bus,name = "usb2";
	qcom,msm_bus,num_cases = <2>;
	qcom,msm_bus,active_only = <0>;
	qcom,msm_bus,num_paths = <1>;
	qcom,msm_bus,vectors =
	<87 512 0 0>,
	<87 512 60000000 960000000>;
	};

	MSM HSUSB EHCI controller

	Required properties :
	- compatible : should be "qcom,ehci-host"
	- reg : offset and length of the register set in the memory map
	- interrupts: IRQ lines used by this controller
	- interrupt-names : Required interrupt resource entries are:
	HSUSB EHCI expects "core_irq" and optionally "async_irq".
	- <supply-name>-supply: handle to the regulator device tree node
	Required "supply-name" is either "hsusb_vdd_dig" or "HSUSB_VDDCX"
	"HSUSB_1p8-supply" "HSUSB_3p3-supply".
	- qcom,usb2-power-budget: maximum vbus power (in mA) that can be provided.

	Optional properties :
	- qcom,usb2-enable-hsphy2: If present, select second PHY for USB operation.
	- qcom,resume-gpio: if present then peripheral connected to usb controller
	cannot wakeup from XO shutdown using in-band usb bus resume. Use resume
	gpio to wakeup peripheral.
	- qcom,vdd-voltage-level: This property must be a list of five integer
	values (no, 0.5vsuspend, 0.75suspend, min, max) where each value respresents
	either a voltage in microvolts or a value corresponding to voltage corner.
	First value represents value to vote when USB is not at all active, second
	value represents value to vote when target is not connected to dock during low
	power mode, third value represents vlaue to vote when target is connected to dock
	and no peripheral connected over dock during low power mode, fourth value represents
	minimum value to vote when USB is operational, fifth item represents maximum value
	to vote for USB is operational.

	Example MSM HSUSB EHCI controller device node :
	ehci: qcom,ehci-host@f9a55000 {
	compatible = "qcom,ehci-host";
	reg = <0xf9a55000 0x400>;
	interrupts = <0 134 0>, <0 140 0>;
	interrupt-names = "core_irq", "async_irq";
	hsusb_vdd_dig-supply = <&pm8841_s2_corner>;
	HSUSB_1p8-supply = <&pm8941_l6>;
	HSUSB_3p3-supply = <&pm8941_l24>;
	qcom,usb2-enable-hsphy2;
	qcom,usb2-power-budget = <500>;
	qcom,vdd-voltage-level = <1 2 3 5 7>;
	};

	ANDROID USB:

	Required properties:
	- compatible: should be "qcom,android-usb"

	Optional properties :
	- reg : offset and length of memory region that is used by device to
	update USB PID and serial numbers used by bootloader in DLOAD mode.
	- qcom,android-usb-swfi-latency : value to be used by device to vote
	for DMA latency in microsecs.
	- qcom,android-usb-cdrom : if this property is present then device creates
	a new LUN as CD-ROM
	- qcom,android-usb-internal-ums : if this property is present then device
	creates a new LUN as internal usb mass storage.
	- qcom,streaming-func : add list of usb function name. If mention usb function
	is being enable as part of USB composition, streaming mode is enable with
	usb device controller to get better throughput. NOTE: Inverted CRC and
	turnaround timeout is observed on enabling streaming. Hence it is required
	to see these errors and number of erros on enabling this at USB level to make
	final decision to enable this feature or not.
	Example Android USB device node :
	android_usb@fc42b0c8 {
	compatible = "qcom,android-usb";
	reg = <0xfc42b0c8 0xc8>;
	qcom,android-usb-swfi-latency = <1>;
	qcom,streaming-func = "rndis","mtp";
	};


	BAM:

	Required properties:
	- compatible: should be "qcom,usb-bam-msm"
	- reg : pairs of physical base addresses and region sizes
	of all the memory mapped BAM devices present
	- reg-names : Register region name(s), in 1-1 correspondence with the
	registers in 'reg'. This list should contain at least as many names
	as the number of unique values given in both 'usb-active-bam' and
	all the subnodes' 'usb-bam-type' properties.

	If SSUSB_BAM is used, "ssusb" should be present.
	If HSUSB_BAM is used, "hsusb" should be present.
	If HSIC_BAM is used, "hsic" should be present.

	If a QSCRATCH RAM1 register is designated for providing USB3
	private memory to use as a BAM FIFO, specify "qscratch_ram1_reg".
	- interrupts: IRQ lines for BAM devices
	- interrupt-names: BAM interrupt name(s), in 1-1 correspondence with
	'interrupts' above.

	If SSUSB_BAM is used, "ssusb" should be present.
	If HSUSB_BAM is used, "hsusb" should be present.
	If HSIC_BAM is used, "hsic" should be present.
	- qcom,usb-bam-num-pipes: max number of pipes that can be used

	Optional properties:
	- qcom,usb-bam-fifo-baseaddr: base address for bam pipe's data and descriptor
	fifos. This can be on chip memory (ocimem) or usb private memory. This
	property is required if sub-node's mem-type is ocimem or usb private mem.

	A number of USB BAM pipe parameters are represented as sub-nodes:

	Subnode Required:
	- label: a string describing uniquely the usb bam pipe. The string can be
	constracted as follows: <core>-<peer>-<direction>-<pipe num>.
	core options: hsusb, ssusb/dwc3, hsic
	peer options: qdss, ipa, a2
	direction options: in (from peer to usb), out (from usb to peer)
	pipe num options: 0..127
	- qcom,usb-bam-mem-type: Type of memory used by this PIPE. Can be one of
	0 - Uses SPS's dedicated pipe memory
	1 - USB's private memory residing @ 'qcom,usb-bam-fifo-baseaddr'
	2 - System RAM allocated by driver
	3 - OCI memory residing @ 'qcom,usb-bam-fifo-baseaddr'
	- qcom,bam-type: BAM type can be one of
	0 - SSUSB_BAM
	1 - HSUSB_BAM
	2 - HSIC_BAM
	- qcom,dir: pipe direction
	0 - from usb (out)
	1 - to usb (in)
	- qcom,pipe-num: pipe number
	- qcom,peer-bam: peer BAM can be one of
	0 - A2_P_BAM
	1 - QDSS_P_BAM
	2 - IPA_P_BAM
	- qcom,data-fifo-size: data fifo size
	- qcom,descriptor-fifo-size: descriptor fifo size

	Optional Properties for Subnode:
	- qcom,reset-bam-on-connect: If present then BAM is RESET before connecting
	pipe. This may be required if BAM peripheral is also reset before connect.
	- qcom,dst-bam-physical-address: destination BAM physical address
	- qcom,dst-bam-pipe-index: destination BAM pipe index
	- qcom,src-bam-physical-address: source BAM physical address
	- qcom,src-bam-pipe-index: source BAM pipe index
	- qcom,data-fifo-offset: data fifo offset address
	- qcom,descriptor-fifo-offset: descriptor fifo offset address

	Optional properties :
	- qcom,ignore-core-reset-ack: If present then BAM ignores ACK from USB core
	while performing PIPE RESET
	- qcom,disable-clk-gating: If present then disable BAM clock gating.

	Example USB BAM controller device node:

	qcom,usbbam@f9a44000 {
	compatible = "qcom,usb-bam-msm";
	reg = <0xf9a44000 0x11000>;
	reg-names = "hsusb";
	interrupts = <0 135 0>;
	interrupt-names = "hsusb";
	qcom,usb-bam-num-pipes = <16>;
	qcom,ignore-core-reset-ack;
	qcom,disable-clk-gating;

	qcom,pipe0 {
	label = "hsusb-ipa-out-0";
	qcom,usb-bam-mem-type = <0>;
	qcom,bam-type = <1>;
	qcom,dir = <0>;
	qcom,pipe-num = <0>;
	qcom,peer-bam = <2>;
	qcom,src-bam-physical-address = <0xf9a44000>;
	qcom,src-bam-pipe-index = <1>;
	qcom,data-fifo-offset = <0x2200>;
	qcom,data-fifo-size = <0x1e00>;
	qcom,descriptor-fifo-offset = <0x2100>;
	qcom,descriptor-fifo-size = <0x100>;
	};
	qcom,pipe1 {
	label = "hsusb-ipa-in-0";
	qcom,usb-bam-mem-type = <0>;
	qcom,bam-type = <1>;
	qcom,dir = <1>;
	qcom,pipe-num = <0>;
	qcom,peer-bam = <2>;
	qcom,dst-bam-physical-address = <0xf9a44000>;
	qcom,dst-bam-pipe-index = <0>;
	qcom,data-fifo-offset = <0x300>;
	qcom,data-fifo-size = <0x1e00>;
	qcom,descriptor-fifo-offset = <0>;
	qcom,descriptor-fifo-size = <0x300>;
	};
	};