linux-kernel - Re: [PATCH] usb: dwc3: core: clarify usb-phy array binding

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Date:	Fri, 9 Aug 2013 17:28:49 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Kumar Gala <galak@...eaurora.org>
Cc:	"balbi@...com" <balbi@...com>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	Pawel Moll <Pawel.Moll@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb: dwc3: core: clarify usb-phy array binding

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@...eaurora.org>
> ---
>  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?

Mark.
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