Hi,
On 2018/12/19 22:14, Rob Herring wrote:
> On Mon, Dec 03, 2018 at 11:45:05AM +0800, Yu Chen wrote:
>> This patch adds binding documentation for supporting the hi3660 usb
>> phy on boards like the HiKey960.
>>
>> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
>> Cc: Mark Rutland <mark.rutland@xxxxxxx>
>> Cc: John Stultz <john.stultz@xxxxxxxxxx>
>> Cc: Binghui Wang <wangbinghui@xxxxxxxxxxxxx>
>> Signed-off-by: Yu Chen <chenyu56@xxxxxxxxxx>
>> --
>> v1: Fix some format error as suggested by Rob.
>> --
>> ---
>> .../devicetree/bindings/phy/phy-hi3660-usb3.txt | 21 +++++++++++++++++++++
>> 1 file changed, 21 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/phy/phy-hi3660-usb3.txt
>>
>> diff --git a/Documentation/devicetree/bindings/phy/phy-hi3660-usb3.txt b/Documentation/devicetree/bindings/phy/phy-hi3660-usb3.txt
>> new file mode 100644
>> index 000000000000..8ea52d51aa13
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/phy-hi3660-usb3.txt
>> @@ -0,0 +1,21 @@
>> +Hisilicon hi3660 usb PHY
>
> s/usb/USB/
OK.
>
>> +-----------------------
>> +
>> +Required properties:
>> +- compatible: should be "hisilicon,hi3660-usb-phy"
>> +- #phy-cells: must be 0
>> +- hisilicon,pericrg-syscon: phandle of syscon used to control phy.
>> +- hisilicon,pctrl-syscon: phandle of syscon used to control phy.
>> +- hisilicon,usb3-otg-bc-syscon: phandle of syscon used to control phy.
>> +- hisilicon,eye-diagram-param: parameter set for phy
>> +Refer to phy/phy-bindings.txt for the generic PHY binding properties
>
> Doesn't a phy need some clocks?
>
Yes, the clocks of USB phy currently is enabled by config the
pctrl-syscon registers and pericrg-syscon.
>> +
>> +Example:
>> + usb-phy {
>> + compatible = "hisilicon,hi3660-usb-phy";
>> + #phy-cells = <0>;
>> + hisilicon,pericrg-syscon = <&crg_ctrl>;
>> + hisilicon,pctrl-syscon = <&pctrl>;
>> + hisilicon,usb3-otg-bc-syscon = <&usb3_otg_bc>;
>
> Is one of these the "main" registers for the phy? If so, then make this
> a child of that syscon node.
>
Ok, the usb3-otg-bc-syscon is the "main" registers for the phy.
>> + hisilicon,eye-diagram-param = <0x22466e4>;
>> + };
>> --
>> 2.15.0-rc2
>>
>
> .
>
