On Sun, Aug 21, 2016 at 02:16:38PM +0200, Hans de Goede wrote: > On some devices the musb otg controller can be used in both device and > host mode, but requires software mode switching since there is no id pin > connected. The usb0 phy code will default to device mode in this case. > > On some systems usb0 is connected to a female USB-A port. It can still > be used in device mode when using software mode switching and a USB > A to A cable. To configure the controller to support both modes we must > set its "dr_mode" dt property to "otg" (*). For these setups the device > mode default is wrong, for a female USB-A port the default should be > host mode. > > This commit adds support to the sun4i phy code for a new > "allwinner,usb0-usb-a-connector" dt property which can be used in dt > files to indicate this scenario and when present it changes the default > mode to host mode. > > *) dr_mode = "host" is used when device mode is _never_ used. E.g. > a wifi module soldered onto the PCB is connected to the musb controller. > > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > --- > Changes in v2: > -New patch in v2 of this patchset > Changes in v3: > -No changes > --- > Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt | 2 ++ > drivers/phy/phy-sun4i-usb.c | 9 ++++++++- > 2 files changed, 10 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt > index 287150d..8646b53 100644 > --- a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt > +++ b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt > @@ -35,6 +35,8 @@ Optional properties: > - usb0_vbus-supply : regulator phandle for controller usb0 vbus > - usb1_vbus-supply : regulator phandle for controller usb1 vbus > - usb2_vbus-supply : regulator phandle for controller usb2 vbus > +- allwinner,usb0-usb-a-connector: usb0 is connected to an USB-A connector, > + rather then an USB-B connector as one would expect (bool) This seems like a pretty generic problem: a board has an A connector wired to an OTG controller. So I think we should have a generic property. The only part is here that is not is you have 3 USB buses for the PHY. That probably should have been 3 child nodes for each PHY port. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
