On Fri, Aug 09, 2013 at 01:42:15PM -0500, Kumar Gala wrote: > > On Aug 9, 2013, at 11:28 AM, Mark Rutland wrote: > > > On Fri, Aug 09, 2013 at 04:40:32PM +0100, Kumar Gala wrote: > >> The binding spec wasn't clear that the order of the phandles in the > >> usb-phy array has meaning. Clarify this point in the binding that > >> it should be <USB2-HS-PHY, USB3-SS-PHY>. > >> > >> Signed-off-by: Kumar Gala <galak@xxxxxxxxxxxxxx> > >> --- > >> Documentation/devicetree/bindings/usb/dwc3.txt | 4 +++- > >> 1 file changed, 3 insertions(+), 1 deletion(-) > >> > >> diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt > >> index 7a95c65..8a9770b 100644 > >> --- a/Documentation/devicetree/bindings/usb/dwc3.txt > >> +++ b/Documentation/devicetree/bindings/usb/dwc3.txt > >> @@ -6,7 +6,9 @@ Required properties: > >> - compatible: must be "synopsys,dwc3" > >> - reg : Address and length of the register set for the device > >> - interrupts: Interrupts used by the dwc3 controller. > >> - - usb-phy : array of phandle for the PHY device > >> + - usb-phy : array of phandle for the PHY device. The first element > >> + in the array is expected to be a handle to the USB2/HS PHY and > >> + the second element is expected to be a handle to the USB3/SS PHY > > > > Just to check - it's not valid to have a USB3 phy without a USB2 phy? > > Don't know, hopefully Felipe will chime in on that. that'd be a really non-standard implementation. Per-spec, USB3 is *always* backwards compatible with USB2. -- balbi
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