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Freescale SOC USB controllers
The device node for a USB controller that is part of a Freescale
SOC is as described in the document "Open Firmware Recommended
Practice : Universal Serial Bus" with the following modifications
and additions :
Required properties :
- compatible : Should be "fsl-usb2-mph" for multi port host USB
controllers, or "fsl-usb2-dr" for dual role USB controllers
or "fsl,mpc5121-usb2-dr" for dual role USB controllers of MPC5121.
Wherever applicable, the IP version of the USB controller should
also be mentioned (for eg. fsl-usb2-dr-v2.2 for bsc9132).
- phy_type : For multi port host USB controllers, should be one of
"ulpi", or "serial". For dual role USB controllers, should be
one of "ulpi", "utmi", "utmi_wide", or "serial".
- reg : Offset and length of the register set for the device
- port0 : boolean; if defined, indicates port0 is connected for
fsl-usb2-mph compatible controllers. Either this property or
"port1" (or both) must be defined for "fsl-usb2-mph" compatible
controllers.
- port1 : boolean; if defined, indicates port1 is connected for
fsl-usb2-mph compatible controllers. Either this property or
"port0" (or both) must be defined for "fsl-usb2-mph" compatible
controllers.
- dr_mode : indicates the working mode for "fsl-usb2-dr" compatible
controllers. Can be "host", "peripheral", or "otg". Default to
"host" if not defined for backward compatibility.
Recommended properties :
- interrupts : <a b> where a is the interrupt number and b is a
field that represents an encoding of the sense and level
information for the interrupt. This should be encoded based on
the information in section 2) depending on the type of interrupt
controller you have.
Optional properties :
- fsl,invert-drvvbus : boolean; for MPC5121 USB0 only. Indicates the
port power polarity of internal PHY signal DRVVBUS is inverted.
- fsl,invert-pwr-fault : boolean; for MPC5121 USB0 only. Indicates
the PWR_FAULT signal polarity is inverted.
Example multi port host USB controller device node :
usb@22000 {
compatible = "fsl-usb2-mph";
reg = <22000 1000>;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <700>;
interrupts = <27 1>;
phy_type = "ulpi";
port0;
port1;
};
Example dual role USB controller device node :
usb@23000 {
compatible = "fsl-usb2-dr";
reg = <23000 1000>;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <700>;
interrupts = <26 1>;
dr_mode = "otg";
phy = "ulpi";
};
Example dual role USB controller device node for MPC5121ADS:
usb@4000 {
compatible = "fsl,mpc5121-usb2-dr";
reg = <0x4000 0x1000>;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = < &ipic >;
interrupts = <44 0x8>;
dr_mode = "otg";
phy_type = "utmi_wide";
fsl,invert-drvvbus;
fsl,invert-pwr-fault;
};
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