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doc: dt-binding: usb: add otg related properties 

Add otg version, srp, hnp and adp support for usb OTG port, then those OTG
features don't have to be decided by usb gadget drivers.

Signed-off-by: Li Jun <jun.li@freescale.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Li Jun 2015-07-09 15:18:43 +08:00 committed by Felipe Balbi
parent 53e6242db8
commit b5513dede7
1 changed files with 15 additions and 0 deletions
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15
Documentation/devicetree/bindings/usb/generic.txt
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@ -11,6 +11,19 @@ Optional properties:
"peripheral" and "otg". In case this attribute isn't "peripheral" and "otg". In case this attribute isn't
passed via DT, USB DRD controllers should default to passed via DT, USB DRD controllers should default to
OTG. OTG.
- otg-rev: tells usb driver the release number of the OTG and EH supplement
with which the device and its descriptors are compliant,
in binary-coded decimal (i.e. 2.0 is 0200H). This
property is used if any real OTG features(HNP/SRP/ADP)
is enabled, if ADP is required, otg-rev should be
0x0200 or above.
- hnp-disable: tells OTG controllers we want to disable OTG HNP, normally HNP
is the basic function of real OTG except you want it
to be a srp-capable only B device.
- srp-disable: tells OTG controllers we want to disable OTG SRP, SRP is
optional for OTG device.
- adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is
optional for OTG device.
This is an attribute to a USB controller such as: This is an attribute to a USB controller such as:
@ -21,4 +34,6 @@ dwc3@4a030000 {
usb-phy = <&usb2_phy>, <&usb3,phy>; usb-phy = <&usb2_phy>, <&usb3,phy>;
maximum-speed = "super-speed"; maximum-speed = "super-speed";
dr_mode = "otg"; dr_mode = "otg";
otg-rev = <0x0200>;
adp-disable;
}; };