linux-kernel - Re: [PATCH v12 1/3] dt-bindings: Add a binding for Mediatek xHCI host controller

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Date:	Thu, 19 Nov 2015 11:36:51 +0800
From:	chunfeng yun <chunfeng.yun@...iatek.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.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>,
	"Roger Quadros" <rogerq@...com>, <linux-usb@...r.kernel.org>,
	<linux-mediatek@...ts.infradead.org>,
	John Crispin <blogic@...nwrt.org>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Pawel Moll <pawel.moll@....com>,
	"Ian Campbell" <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v12 1/3] dt-bindings: Add a binding for Mediatek xHCI
 host controller

Hi,
On Tue, 2015-11-17 at 13:58 +0300, Sergei Shtylyov wrote:
> Hello.
> 
> On 11/17/2015 12:18 PM, 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        | 51 ++++++++++++++++++++++
> >   1 file changed, 51 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..a78f20b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/usb/mt8173-xhci.txt
> > @@ -0,0 +1,51 @@
> > +MT8173 xHCI
> > +
> > +The device node for Mediatek SOC USB3.0 host controller
> > +
> > +Required properties:
> > + - compatible : should contain "mediatek,mt8173-xhci"
> > + - reg : specifies physical base address and size of the registers,
> > +	the first one for MAC, the second for IPPC
> > + - interrupts : interrupt used by the controller
> > + - power-domains : a phandle to USB power domain node to control USB's
> > +	mtcmos
> 
>     What's that?
It works as a gateway in fact which can turn on/off usb power
> 
> > + - vusb33-supply : regulator of USB avdd3.3v
> > +
> > + - clocks : a list of phandle + clock-specifier pairs, one for each
> > +	entry in clock-names
> > + - clock-names : must contain
> > +	"sys_ck": for clock of xHCI MAC
> > +	"wakeup_deb_p0": for USB wakeup debounce clock of port0
> > +	"wakeup_deb_p0": for USB wakeup debounce clock of port1
> 
>     "wakeup_deb_p1"?
Yes, it's a typo
> 
> > +
> > + - phys : a list of phandle + phy specifier pairs
> > +
> > +Optional properties:
> > + - mediatek,wakeup-src : 1: ip sleep wakeup mode; 2: line state wakeup
>                                 ^^ IP?
Ok
> 
> > +	mode;
> > + - mediatek,syscon-wakeup : phandle to syscon used to access USB wakeup
> > +	control register, it depends on "mediatek,wakeup-src".
> > + - vbus-supply : reference to the VBUS regulator;
> > + - usb3-lpm-capable : supports USB3.0 LPM
> 
> [...]
> 
> MBR, Sergei
> 


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