From: Ramneek Mehresh ramneek.mehresh@freescale.com
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 --- doc/README.fsl-hwconfig | 26 ++++++++++++++++++++++++++ 1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/doc/README.fsl-hwconfig b/doc/README.fsl-hwconfig index 03fea74..6889a70 100644 --- a/doc/README.fsl-hwconfig +++ b/doc/README.fsl-hwconfig @@ -19,3 +19,29 @@ 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' +