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

[Hans de Goede <hdegoede@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@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.

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@0x01c13400 {
>  		#phy-cells = <1>;
>