linux-kernel - Re: [PATCH v2 02/10] dt-bindings: misc: Add bindings for HiSilicon usb hub and data role switch functionality on HiKey960

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Date:   Wed, 20 Feb 2019 10:34:16 +0800
From:   Chen Yu <chenyu56@...wei.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <liuyu712@...ilicon.com>, <john.stultz@...aro.org>,
        <suzhuangluan@...ilicon.com>, <kongfei@...ilicon.com>,
        <wanghu17@...ilicon.com>, <butao@...ilicon.com>,
        <chenyao11@...wei.com>, <fangshengzhou@...ilicon.com>,
        <lipengcheng8@...wei.com>, <songxiaowei@...ilicon.com>,
        <xuyiping@...ilicon.com>, <xuyoujun4@...wei.com>,
        <yudongbin@...ilicon.com>, <zangleigang@...ilicon.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Binghui Wang <wangbinghui@...ilicon.com>
Subject: Re: [PATCH v2 02/10] dt-bindings: misc: Add bindings for HiSilicon
 usb hub and data role switch functionality on HiKey960

Hi,

On 2019/2/19 16:25, Sergei Shtylyov wrote:
> Hello!
> 
> On 18.02.2019 14:23, Yu Chen wrote:
> 
>> This patch adds binding documentation to support usb hub and usb
>> data role switch of Hisilicon HiKey960 Board.
>>
>> Cc: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
>> Cc: Rob Herring <robh+dt@...nel.org>
>> Cc: Mark Rutland <mark.rutland@....com>
>> Cc: John Stultz <john.stultz@...aro.org>
>> Cc: Binghui Wang <wangbinghui@...ilicon.com>
>> Signed-off-by: Yu Chen <chenyu56@...wei.com>
>> ---
>> v1:
>> * Fix some format errors as suggested by Sergei.
>> * Modify gpio description to use gpiod API.
>> v2:
>> * Remove information about Hikey.
>> * Fix gpio description.
>> * Remove device_type of endpoint.
>> ---
>> ---
>>   .../bindings/misc/hisilicon-hikey-usb.txt          | 35 ++++++++++++++++++++++
>>   1 file changed, 35 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.txt
>>
>> diff --git a/Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.txt b/Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.txt
>> new file mode 100644
>> index 000000000000..c2b789b515df
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.txt
>> @@ -0,0 +1,35 @@
>> +Support usb hub and usb data role switch of Hisilicon HiKey960 Board.
>> +
>> +-----------------------------
>> +
>> +Required properties:
>> +- compatible: "hisilicon,gpio-hubv1","hisilicon,hikey960-usb"
> 
>    Only one of those, looking at your example?
"hisilicon,gpio-hubv1" is similar as "hisilicon,hikey960-usb".

>    Need a space after comma, BTW.
OK. Thanks!

> 
>> +- typec-vbus-gpios: gpio to control the vbus of typeC port
>> +- typec-vbus-enable-val: gpio value that enable the vbus of typeC port
> 
>    Hm, I thought that can be inferred from the GPIO specifier above...
> 
OK. Thanks!

>> +- otg-switch-gpios: gpio to switch DP & DM between the hub and typeC port
>> +- hub-vdd33-en-gpios: gpio to enable the power of hub
>> +- pinctrl-0: pinctrl config
> 
>    You forgot about "pinctrl-names"...
OK. Thanks!

> 
>> +
>> +Example
>> +-----
>> +
>> +    hisi_hikey_usb: hisi_hikey_usb {
>> +        compatible = "hisilicon,hikey960-usb";
>> +        typec-vbus-gpios = <&gpio25 2 0>;
>> +        typec-vbus-enable-val = <1>;
>> +        otg-switch-gpios = <&gpio25 6 0>;
>> +        hub-vdd33-en-gpios = <&gpio5 6 0>;
>> +        pinctrl-names = "default";
>> +        pinctrl-0 = <&usbhub5734_pmx_func>;
>> +
>> +        port {
>> +            #address-cells = <1>;
>> +            #size-cells = <0>;
>> +
>> +            hikey_usb_ep: endpoint@0 {
>> +                reg = <0>;
>> +                remote-endpoint = <&dwc3_role_switch_notify>;
>> +            };
>> +        };
>> +
>> +    };
> 
> MBR, Sergei
> 
> .
> 

Thanks
Yu Chen