linux-kernel - Re: [PATCH v2 6/9] dt-bindings: phy: add binding for Allwinner USB3 PHY

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Message-ID: <C01136F1-594C-4459-B9C6-6E0434855234@aosc.io>
Date:   Thu, 12 Jul 2018 00:19:28 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Rob Herring <robh@...nel.org>
CC:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v2 6/9] dt-bindings: phy: add binding for Allwinner USB3 PHY



于 2018年7月12日 GMT+08:00 上午12:13:56, Rob Herring <robh@...nel.org> 写到:
>On Fri, Jul 06, 2018 at 11:38:02PM +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>
>> ---
>> Splitted from the PHY driver patch in v1.
>> 
>>  .../bindings/phy/sun50i-usb3-phy.txt          | 24
>+++++++++++++++++++
>>  1 file changed, 24 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..912d55f9f69d
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/sun50i-usb3-phy.txt
>> @@ -0,0 +1,24 @@
>> +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:
>> +- phy-supply : from the generic phy bindings, a phandle to a
>regulator that
>> +	       provides power to VBUS.
>
>Power to the phy or Vbus? If the latter only, then this property should
>
>be elsewhere (like a connector node).

I don't think there's connector nodes for USB ports now.

And by checking existed device trees, use phy-supply on USB
phy is common. It's seen on Meson GXBB, RK3399 and Hi6220
in arch/arm64/boot/dts.

>
>> +
>> +Example:
>> +	usb3phy: phy@...0000 {
>> +		compatible = "allwinner,sun50i-h6-usb3-phy";
>> +		reg = <0x5210000 0x10000>;
>> +		clocks = <&ccu CLK_USB_PHY1>;
>> +		resets = <&ccu RST_USB_PHY1>;
>> +		#phy-cells = <0>;
>> +		status = "disabled";
>> +	};
>> -- 
>> 2.17.1
>> 
>> --
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