linux-kernel - Re: [PATCH v2 1/5] dt-bindings: Add usb3.0 phy binding for MT65xx SoCs

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Date:	Fri, 10 Jul 2015 07:10:18 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Chunfeng Yun <chunfeng.yun@...iatek.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>, 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
Subject: Re: [PATCH v2 1/5] dt-bindings: Add usb3.0 phy binding for MT65xx
 SoCs

On Wed, Jul 08, 2015 at 05:41:03PM +0800, Chunfeng Yun wrote:
> add a DT binding documentation of usb3.0 phy for MT65xx
> SoCs from Mediatek.
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> ---
>  .../devicetree/bindings/usb/mt65xx-u3phy.txt       | 34 ++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt
> 
> diff --git a/Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt b/Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt
> new file mode 100644
> index 0000000..056b2aa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/mt65xx-u3phy.txt
> @@ -0,0 +1,34 @@
> +MT65xx U3PHY
> +
> +The device node for Mediatek SOC usb3.0 phy
> +
> +Required properties:
> + - compatible : Should be "mediatek,mt8173-u3phy"
> + - reg        : Offset and length of registers, the first is for mac domain,
> +	another for phy domain
> + - power-domains: to enable usb's mtcmos
> + - usb-wakeup-ctrl : to access usb wakeup control register
> + - wakeup-src : 1: ip sleep wakeup mode; 2: line state wakeup mode; others
> +	means don't enable wakeup source of usb
> + - u2port-num : number of usb2.0 ports to support which should be 1 or 2
> + - clocks     : must support all clocks that phy need
> + - clock-names: should be "wakeup_deb_p0", "wakeup_deb_p1" for wakeup
> +	debounce control clocks, and "u3phya_ref" for u3phya reference clock.
> +
> +Example:
> +
> +u3phy: usb-phy@...71000 {
> +	compatible = "mediatek,mt8173-u3phy";
> +	reg = <0 0x11271000 0 0x3000>,
> +	      <0 0x11280000 0 0x20000>;

0x11271000 is the register space the xhci controller takes. You should
not expose the same register space to two different drivers.

Sascha

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