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dt-bindings: add binding for USBSS-DRD controller.

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This patch aim at documenting USB related dt-bindings for the
Cadence USBSS-DRD controller.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Pawel Laszczak 2019-08-26 12:19:26 +01:00 committed by Felipe Balbi
parent cca3854010
commit a7a3a6a941
1 changed files with 45 additions and 0 deletions
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Documentation/devicetree/bindings/usb/cdns-usb3.txt Normal file
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Binding for the Cadence USBSS-DRD controller
Required properties:
- reg: Physical base address and size of the controller's register areas.
Controller has 3 different regions:
- HOST registers area
- DEVICE registers area
- OTG/DRD registers area
- reg-names - register memory area names:
"xhci" - for HOST registers space
"dev" - for DEVICE registers space
"otg" - for OTG/DRD registers space
- compatible: Should contain: "cdns,usb3"
- interrupts: Interrupts used by cdns3 controller:
"host" - interrupt used by XHCI driver.
"peripheral" - interrupt used by device driver
"otg" - interrupt used by DRD/OTG part of driver
Optional properties:
- maximum-speed : valid arguments are "super-speed", "high-speed" and
"full-speed"; refer to usb/generic.txt
- dr_mode: Should be one of "host", "peripheral" or "otg".
- phys: reference to the USB PHY
- phy-names: from the *Generic PHY* bindings;
Supported names are:
- cdns3,usb2-phy
- cdns3,usb3-phy
- cdns,on-chip-buff-size : size of memory intended as internal memory for endpoints
buffers expressed in KB
Example:
usb@f3000000 {
compatible = "cdns,usb3";
interrupts = <GIC_USB_IRQ 7 IRQ_TYPE_LEVEL_HIGH>,
<GIC_USB_IRQ 7 IRQ_TYPE_LEVEL_HIGH>,
<GIC_USB_IRQ 8 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "host", "peripheral", "otg";
reg = <0xf3000000 0x10000>, /* memory area for HOST registers */
<0xf3010000 0x10000>, /* memory area for DEVICE registers */
<0xf3020000 0x10000>; /* memory area for OTG/DRD registers */
reg-names = "xhci", "dev", "otg";
phys = <&usb2_phy>, <&usb3_phy>;
phy-names = "cdns3,usb2-phy", "cnds3,usb3-phy";
};