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powerpc/85xx: Specify hwconfig usage for USB controller

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Specify hwconfig usage for USB mode and phy change

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Ramneek Mehresh 2011-03-06 22:17:28 -06:00 committed by Kumar Gala
parent 72f4980b40
commit 636c316f9b
1 changed files with 25 additions and 0 deletions
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doc/README.fsl-hwconfig
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@ -19,3 +19,28 @@ audclk
'audclk:12'
Select the 12.288MHz clock
usb
Specific to boards have USB controller
This option specifies the following for a USB controller:
- which controller mode to use
- which USB PHY to use
This is used by generic USB device-tree fixup function to update
modified values of phy type and controller mode.
Also used for configuring multiple USB controllers such that
'usbN' (where N is 1, 2, etc. refers to controller no.)
'phy_type'
Select USB phy type: 'utmi' OR 'ulpi'
'dr_mode'
Select USB controller mode: 'host', 'peripheral' OR 'otg'
Examples:
usb1:dr_mode=host;usb2:dr_mode=peripheral'
usb1:dr_mode=host,phy_type=utmi;usb2:dr_mode=host'