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:   Tue, 19 Feb 2019 11:25:55 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Yu Chen <chenyu56@...wei.com>, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     john.stultz@...aro.org, suzhuangluan@...ilicon.com,
        kongfei@...ilicon.com, liuyu712@...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

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?
    Need a space after comma, BTW.

> +- 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...

> +- 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"...

> +
> +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