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

[Robin Murphy <robin.murphy@arm.com>]

On 06/03/18 01:57, Rob Herring wrote:
> 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@st.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_").

Does that still work if there is an external supply for port 1 but none 
for port 0? I believe that was brought up as a possibility before.

Robin.