linux-kernel - Re: [PATCH v4 07/10] dt-bindings: phy: add binding for Allwinner USB3 PHY

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Date:   Sun, 14 Oct 2018 10:41:29 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Rob Herring <robh@...nel.org>
Cc:     devicetree@...r.kernel.org,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        linux-sunxi@...glegroups.com, linux-kernel@...r.kernel.org,
        Kishon Vijay Abraham I <kishon@...com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 07/10] dt-bindings: phy: add binding for Allwinner
 USB3 PHY

在 2018-10-05五的 15:58 -0500，Rob Herring写道：
> On Thu, Oct 04, 2018 at 08:28:52PM +0800, Icenowy Zheng wrote:
> > The new Allwinner H6 SoC contains a USB3 PHY that is wired to the
> > external USB3 pins of the SoC.
> > 
> > Add a device tree binding for the PHY.
> > 
> > Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> > Reviewed-by: Chen-Yu Tsai <wens@...e.org>
> > ---
> > Changes in v4:
> > - Changed Vbus regulator property to vbus-supply.
> > 
> > Changes in v3:
> > - Added Chen-Yu's Review tag.
> > 
> > No changes in v2, v1.
> > 
> >  .../bindings/phy/sun50i-usb3-phy.txt          | 23
> > +++++++++++++++++++
> >  1 file changed, 23 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/phy/sun50i-
> > usb3-phy.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/phy/sun50i-usb3-
> > phy.txt b/Documentation/devicetree/bindings/phy/sun50i-usb3-phy.txt
> > new file mode 100644
> > index 000000000000..9f49c6b8c7e7
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/phy/sun50i-usb3-phy.txt
> > @@ -0,0 +1,23 @@
> > +Allwinner sun50i USB3 PHY
> > +-----------------------
> > +
> > +Required properties:
> > +- compatible : should be one of
> > +  * allwinner,sun60i-h6-usb3-phy
> > +- reg : a list of offset + length pairs
> > +- #phy-cells : from the generic phy bindings, must be 0
> > +- clocks : phandle + clock specifier for the phy clock
> > +- resets : phandle + reset specifier for the phy reset
> > +
> > +Optional Properties:
> > +- vbus-supply : a phandle to a regulator that provides power to
> > VBUS.
> 
> This belongs in a connector node as it is part of the connector
> unless 
> the phy physically needs Vbus for power.
> 
> But others have done this, so all the phys can just be wrong...

How should we reference the connector?

Via OF graph or simply a property in PHY node?

> 
> > +
> > +Example:
> > +	usb3phy: phy@...0000 {
> 
> usb-phy@
> 
> > +		compatible = "allwinner,sun50i-h6-usb3-phy";
> > +		reg = <0x5210000 0x10000>;
> > +		clocks = <&ccu CLK_USB_PHY1>;
> > +		resets = <&ccu RST_USB_PHY1>;
> > +		#phy-cells = <0>;
> > +		status = "disabled";
> 
> Don't show status in examples.
> 
> > +	};
> > -- 
> > 2.18.0
> > 
> 
> _______________________________________________
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