linux-kernel - Re: [PATCH v2 2/5] dt-bindings: Add a binding for Mediatek xHCI host controller

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Date:	Tue, 14 Jul 2015 10:36:18 +0800
From:	chunfeng yun <chunfeng.yun@...iatek.com>
To:	Roger Quadros <rogerq@...com>
CC:	Mathias Nyman <mathias.nyman@...el.com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	"Matthias Brugger" <matthias.bgg@...il.com>,
	Felipe Balbi <balbi@...com>,
	"Sascha Hauer" <s.hauer@...gutronix.de>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-usb@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v2 2/5] dt-bindings: Add a binding for Mediatek xHCI
 host controller

hi Roger,

On Fri, 2015-07-10 at 11:31 +0300, Roger Quadros wrote:
> Hi,
> 
> On 08/07/15 12:41, Chunfeng Yun wrote:
> > add a DT binding documentation of xHCI host controller for the
> > MT8173 SoC from Mediatek.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> >  .../devicetree/bindings/usb/mt8173-xhci.txt        | 27 ++++++++++++++++++++++
> >  1 file changed, 27 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/usb/mt8173-xhci.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/mt8173-xhci.txt b/Documentation/devicetree/bindings/usb/mt8173-xhci.txt
> > new file mode 100644
> > index 0000000..94cec94
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/usb/mt8173-xhci.txt
> > @@ -0,0 +1,27 @@
> > +MT65XX xhci
> > +
> > +The device node for Mediatek SOC usb3.0 host controller
> > +
> > +Required properties:
> > + - compatible : supports "mediatek,mt8173-xhci"
> > + - reg        : Offset and length of registers
> > + - interrupts : Interrupt mode, number and trigger mode
> > + - reg-vusb33-supply:  regulator of usb avdd3.3v
> > + - reg-vbus-supply : regulator of vbus;
> 
> General trend is to use <supply-name>-supply.
> We already know it is a regulator so no need to add "reg-"
> 
> So those two can be
> 
> vusb33-supply:
> vbus-supply:
> 
I will adjust it later, thanks a lot

> 
> > + - usb-phy : the phy that xhci will bind
> > + - usb3-lpm-capable: supports USB3 LPM
> > + - clocks     : must support all clocks that xhci needs
> > + - clock-names: should be "sys_mac" for sys and mac clocks
> > +
> > +Example:
> > +usb: usb30@...70000 {
> > +	compatible = "mediatek,mt8173-xhci";
> > +	reg = <0 0x11270000 0 0x1000>;
> > +	interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
> > +	reg-vusb33-supply = <&mt6397_vusb_reg>;
> > +	reg-vbus-supply = <&usb_p1_vbus>;
> > +	usb-phy = <&u3phy>;
> > +	usb3-lpm-capable;
> > +	clocks = <&topckgen CLK_TOP_USB30_SEL>;
> > +	clock-names = "sys_mac";
> > +};
> > 
> 
> cheers,
> -roger


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