linux-kernel - Re: [PATCH v4 1/2] dt-bindings: usb: ehci: add optional external vbus supply property

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Date:   Mon, 5 Mar 2018 19:57:43 -0600
From:   Rob Herring <robh@...nel.org>
To:     Amelie Delaunay <amelie.delaunay@...com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Tony Prisk <linux@...sktech.co.nz>,
        Alan Stern <stern@...land.harvard.edu>,
        Roger Quadros <rogerq@...com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Robin Murphy <robin.murphy@....com>, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 1/2] dt-bindings: usb: ehci: add optional external
 vbus supply property

On Thu, Mar 01, 2018 at 10:51:38AM +0100, Amelie Delaunay wrote:
> On some boards, especially when vbus supply requires large current,
> and the charge pump on the PHY isn't enough, an external vbus power switch
> per port may be used.
> Add portN_vbus-supply property to usb-ehci bindings. As the number of ports
> depends on the ehci controller, and the port on which an external vbus
> supply depends on the platform, <portN> is used to make it generic.
> 
> Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
> ---
>  Documentation/devicetree/bindings/usb/usb-ehci.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt
> index 3efde12..cd576db 100644
> --- a/Documentation/devicetree/bindings/usb/usb-ehci.txt
> +++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt
> @@ -19,6 +19,7 @@ Optional properties:
>   - phys : phandle + phy specifier pair
>   - phy-names : "usb"
>   - resets : phandle + reset specifier pair
> + - portN_vbus-supply : phandle of regulator supplying vbus for port N

Just make this an array with the index being the port (and drop 
"portN_").

Rob