[PATCH 1/2] dt: bindings: add allwinner, otg-routed property for phy-sun4i-usb

[Icenowy Zheng]

21.09.2016, 15:10, "Hans de Goede" <hdegoede at redhat.com>:
> Hi,
>
> On 09/21/2016 10:04 AM, Icenowy Zheng wrote:
>>  On some newer Allwinner SoCs (H3 or A64), the PHY0 can be either routed to
>>  the MUSB controller (which is an OTG controller) or the OHCI/EHCI pair
>>  (which is a Host-only controller, but more stable and easy to implement).
>>
>>  This property marks whether on a certain board which controller should be
>>  attached to the PHY.
>>
>>  Signed-off-by: Icenowy Zheng <icenowy at aosc.xyz>
>
> Erm, I think that the idea here is to dynamically switch the routing
> based on the id-pin of the otg connector. IOW use the musb controller
> for device mode, and the ehci/ohci proper for proper host support
> when in host mode.

At least on some boards this implementation works...

(I mean Pine64, which has two USB-A connectors)

>
> Regards,
>
> Hans
>
>>  ---
>>   Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt | 7 +++++++
>>   1 file changed, 7 insertions(+)
>>
>>  diff --git a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
>>  index 287150d..5c11d57 100644
>>  --- a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
>>  +++ b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
>>  @@ -36,6 +36,13 @@ Optional properties:
>>   - usb1_vbus-supply : regulator phandle for controller usb1 vbus
>>   - usb2_vbus-supply : regulator phandle for controller usb2 vbus
>>
>>  +Optional properties for H3 or A64 SoCs:
>>  +- allwinner,otg-routed : USB0 (OTG) PHY is routed to OHCI/EHCI pair rather than
>>  + MUSB. (boolean, if this property is set, the OHCI/EHCI
>>  + controllers at PHY0 should be enabled and the MUSB
>>  + controller must *NOT* be enabled, and thus the PHY can
>>  + only work in host mode)
>>  +
>>   Example:
>>           usbphy: phy at 0x01c13400 {
>>                   #phy-cells = <1>;