forked from Minki/linux
d524dac927
The device tree is used by more than just PowerPC. Make the documentation
directory available to all.
v2: reorganized files while moving to create arch and driver specific
directories.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
82 lines
2.8 KiB
Plaintext
82 lines
2.8 KiB
Plaintext
Freescale SOC USB controllers
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The device node for a USB controller that is part of a Freescale
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SOC is as described in the document "Open Firmware Recommended
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Practice : Universal Serial Bus" with the following modifications
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and additions :
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Required properties :
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- compatible : Should be "fsl-usb2-mph" for multi port host USB
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controllers, or "fsl-usb2-dr" for dual role USB controllers
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or "fsl,mpc5121-usb2-dr" for dual role USB controllers of MPC5121
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- phy_type : For multi port host USB controllers, should be one of
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"ulpi", or "serial". For dual role USB controllers, should be
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one of "ulpi", "utmi", "utmi_wide", or "serial".
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- reg : Offset and length of the register set for the device
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- port0 : boolean; if defined, indicates port0 is connected for
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fsl-usb2-mph compatible controllers. Either this property or
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"port1" (or both) must be defined for "fsl-usb2-mph" compatible
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controllers.
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- port1 : boolean; if defined, indicates port1 is connected for
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fsl-usb2-mph compatible controllers. Either this property or
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"port0" (or both) must be defined for "fsl-usb2-mph" compatible
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controllers.
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- dr_mode : indicates the working mode for "fsl-usb2-dr" compatible
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controllers. Can be "host", "peripheral", or "otg". Default to
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"host" if not defined for backward compatibility.
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Recommended properties :
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- interrupts : <a b> where a is the interrupt number and b is a
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field that represents an encoding of the sense and level
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information for the interrupt. This should be encoded based on
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the information in section 2) depending on the type of interrupt
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controller you have.
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- interrupt-parent : the phandle for the interrupt controller that
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services interrupts for this device.
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Optional properties :
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- fsl,invert-drvvbus : boolean; for MPC5121 USB0 only. Indicates the
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port power polarity of internal PHY signal DRVVBUS is inverted.
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- fsl,invert-pwr-fault : boolean; for MPC5121 USB0 only. Indicates
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the PWR_FAULT signal polarity is inverted.
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Example multi port host USB controller device node :
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usb@22000 {
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compatible = "fsl-usb2-mph";
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reg = <22000 1000>;
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#address-cells = <1>;
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#size-cells = <0>;
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interrupt-parent = <700>;
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interrupts = <27 1>;
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phy_type = "ulpi";
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port0;
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port1;
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};
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Example dual role USB controller device node :
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usb@23000 {
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compatible = "fsl-usb2-dr";
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reg = <23000 1000>;
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#address-cells = <1>;
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#size-cells = <0>;
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interrupt-parent = <700>;
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interrupts = <26 1>;
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dr_mode = "otg";
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phy = "ulpi";
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};
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Example dual role USB controller device node for MPC5121ADS:
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usb@4000 {
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compatible = "fsl,mpc5121-usb2-dr";
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reg = <0x4000 0x1000>;
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#address-cells = <1>;
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#size-cells = <0>;
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interrupt-parent = < &ipic >;
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interrupts = <44 0x8>;
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dr_mode = "otg";
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phy_type = "utmi_wide";
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fsl,invert-drvvbus;
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fsl,invert-pwr-fault;
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};
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