linux/Documentation/devicetree/bindings/usb/pxa-usb.txt
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   1PXA USB controllers
   2
   3OHCI
   4
   5Required properties:
   6 - compatible: Should be "marvell,pxa-ohci" for USB controllers
   7   used in host mode.
   8
   9Optional properties:
  10 - "marvell,enable-port1", "marvell,enable-port2", "marvell,enable-port3"
  11   If present, enables the appropriate USB port of the controller.
  12 - "marvell,port-mode" selects the mode of the ports:
  13        1 = PMM_NPS_MODE
  14        2 = PMM_GLOBAL_MODE
  15        3 = PMM_PERPORT_MODE
  16 - "marvell,power-sense-low" - power sense pin is low-active.
  17 - "marvell,power-control-low" - power control pin is low-active.
  18 - "marvell,no-oc-protection" - disable over-current protection.
  19 - "marvell,oc-mode-perport" - enable per-port over-current protection.
  20 - "marvell,power_on_delay" Power On to Power Good time - in ms.
  21
  22Example:
  23
  24        usb0: ohci@4c000000 {
  25                compatible = "marvell,pxa-ohci", "usb-ohci";
  26                reg = <0x4c000000 0x100000>;
  27                interrupts = <18>;
  28                marvell,enable-port1;
  29                marvell,port-mode = <2>; /* PMM_GLOBAL_MODE */
  30        };
  31
  32