于 2018年7月12日 GMT+08:00 上午12:13:56, Rob Herring <robh@xxxxxxxxxx> 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@xxxxxxx>
>> ---
>> 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@5210000 {
>> + 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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