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

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Date:   Wed, 26 Oct 2016 10:28:43 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     icenowy@...c.xyz, Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Kishon Vijay Abraham I <kishon@...com>
Cc:     Mark Rutland <mark.rutland@....com>,
        Reinder de Haan <patchesrdh@...as.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [linux-sunxi] [PATCH RESEND 1/2] dt: bindings: add
 allwinner,otg-routed property for phy-sun4i-usb

Hi,

On 25-10-16 06:11, 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@...c.xyz>

Icenowy, I appreciate your work on this, but we really need full otg
support with dynamic switching rather then hardwiring the routing, so
this cannot go in as is.

NACK.

Regards,

Hans


> ---
>  Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
> index 287150d..a63c766 100644
> --- a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
> @@ -36,6 +36,12 @@ 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)
> +
>  Example:
>  	usbphy: phy@...1c13400 {
>  		#phy-cells = <1>;
>