README.fsl-hwconfig 1.4 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546
  1. Freescale-specific 'hwconfig' options.
  2. This file documents Freescale-specific key:value pairs for the 'hwconfig'
  3. option. See README.hwconfig for general information about 'hwconfig'.
  4. audclk
  5. Specific to the P1022DS reference board.
  6. This option specifies which of the two oscillator frequencies should be
  7. routed to the Wolfson WM8776 codec. The ngPIXIS can be programmed to
  8. route either a 11.2896MHz or a 12.288MHz clock. The default is
  9. 12.288MHz. This option has two effects. First, the MUX on the board
  10. will be programmed accordingly. Second, the clock-frequency property
  11. in the codec node in the device tree will be updated to the correct
  12. value.
  13. 'audclk:11'
  14. Select the 11.2896MHz clock
  15. 'audclk:12'
  16. Select the 12.288MHz clock
  17. usb
  18. Specific to boards have USB controller
  19. This option specifies the following for a USB controller:
  20. - which controller mode to use
  21. - which USB PHY to use
  22. This is used by generic USB device-tree fixup function to update
  23. modified values of phy type and controller mode.
  24. Also used for configuring multiple USB controllers such that
  25. 'usbN' (where N is 1, 2, etc. refers to controller no.)
  26. 'phy_type'
  27. Select USB phy type: 'utmi' OR 'ulpi'
  28. 'dr_mode'
  29. Select USB controller mode: 'host', 'peripheral' OR 'otg'
  30. Examples:
  31. usb1:dr_mode=host;usb2:dr_mode=peripheral'
  32. usb1:dr_mode=host,phy_type=utmi;usb2:dr_mode=host'