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.delau...@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.
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