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 <20190312134525.GA9706@bogus> <594394e2-c399-39db-979a-fadb17ef28df@huawei.com>
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From:   Rob Herring <robh@kernel.org>
Date:   Wed, 13 Mar 2019 14:38:12 -0500
Message-ID: <CAL_JsqKUCBcKOjaU9WMUjzKtOALAJDpVABbRJLeFTNk3bM5oVA@mail.gmail.com>
Subject: Re: [PATCH v3 01/12] dt-bindings: phy: Add support for HiSilicon's
 hi3660 USB PHY
To:     Chen Yu <chenyu56@huawei.com>
Cc:     liuyu712@hisilicon.com, Linux USB List <linux-usb@vger.kernel.org>,
        devicetree@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        John Stultz <john.stultz@linaro.org>,
        Suzhuangluan <suzhuangluan@hisilicon.com>, kongfei@hisilicon.com,
        wanghu17@hisilicon.com, butao@hisilicon.com, chenyao11@huawei.com,
        fangshengzhou@hisilicon.com,
        Li Pengcheng <lipengcheng8@huawei.com>,
        Song Xiaowei <songxiaowei@hisilicon.com>,
        Yiping Xu <xuyiping@hisilicon.com>, xuyoujun4@huawei.com,
        yudongbin@hisilicon.com, zangleigang <zangleigang@hisilicon.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Binghui Wang <wangbinghui@hisilicon.com>
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On Tue, Mar 12, 2019 at 8:40 PM Chen Yu <chenyu56@huawei.com> wrote:
>
> Hi Rob,
>
> On 2019/3/12 21:45, Rob Herring wrote:
> > On Sat, Mar 02, 2019 at 05:04:54PM +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@kernel.org>
> >> Cc: Mark Rutland <mark.rutland@arm.com>
> >> Cc: John Stultz <john.stultz@linaro.org>
> >> Cc: Binghui Wang <wangbinghui@hisilicon.com>
> >> Signed-off-by: Yu Chen <chenyu56@huawei.com>
> >> ---
> >> v1:
> >> * Fix some format error as suggested by Rob.
> >> v2:
> >> * Change hi3660 usb PHY to hi3660 USB PHY
> >> v3:
> >> * Make device node a subnode of usb3_otg_bc register.
> >> ---
> >> ---
> >>  .../devicetree/bindings/phy/phy-hi3660-usb3.txt    | 28 ++++++++++++++++++++++
> >>  1 file changed, 28 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..6096214a2bc6
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/phy/phy-hi3660-usb3.txt
> >> @@ -0,0 +1,28 @@
> >> +Hisilicon hi3660 USB PHY
> >> +-----------------------
> >> +
> >> +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.
> >
> > You can drop this as it is now just the parent node.
> >
> >> +- hisilicon,eye-diagram-param: parameter set for phy
> >> +Refer to phy/phy-bindings.txt for the generic PHY binding properties
> >> +
> >> +This is a subnode of usb3_otg_bc register node.
> >> +
> >> +Example:
> >> +    usb3_otg_bc: usb3_otg_bc@ff200000 {
> >> +            compatible = "syscon", "simple-mfd";
> >
> > This node should have a specific compatible.
> >
> Do you mean I need write a specific driver for this node ?

No, only that you could if needed in the future. You can still use the
fallbacks for now.

Rob