linux-kernel - Re: [PATCH v3 1/4] dt-bindings: usb: musb: Add support for MediaTek musb controller

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Date:   Thu, 17 Jan 2019 14:06:17 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     min.guo@...iatek.com, Bin Liu <b-liu@...com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Alan Stern <stern@...land.harvard.edu>,
        chunfeng.yun@...iatek.com, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, tony@...mide.com,
        hdegoede@...hat.com
Subject: Re: [PATCH v3 1/4] dt-bindings: usb: musb: Add support for MediaTek
 musb controller

Hello!

On 01/17/2019 10:15 AM, min.guo@...iatek.com wrote:

> From: Min Guo <min.guo@...iatek.com>
> 
> This adds support for MediaTek musb controller in
> host, peripheral and otg mode.
> 
> Signed-off-by: Min Guo <min.guo@...iatek.com>
> ---
>  .../devicetree/bindings/usb/mediatek,musb.txt      | 43 ++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/mediatek,musb.txt
> 
> diff --git a/Documentation/devicetree/bindings/usb/mediatek,musb.txt b/Documentation/devicetree/bindings/usb/mediatek,musb.txt
> new file mode 100644
> index 0000000..3e3f671
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/mediatek,musb.txt
> @@ -0,0 +1,43 @@
> +MediaTek musb DRD/OTG controller
> +-------------------------------------------
> +
> +Required properties:
> + - compatible      : should be "mediatek,mtk-musb"
> + - reg             : specifies physical base address and size of
> +   the registers

   I'd indent it more to align with "specifies", else it looks weird.

> + - interrupts      : interrupt used by musb controller
> + - interrupt-names : must be "mc"
> + - phys            : PHY specifier for the OTG phy
> + - dr_mode         : should be one of "host", "peripheral" or "otg",
> +   refer to usb/generic.txt

  Same here...

> + - clocks          : a list of phandle + clock-specifier pairs, one for
> +   each entry in clock-names

   Here...

> + - clock-names     : must contain "main", "mcu", "univpll"
> +   for clocks of controller

  And here.

> +
> +Optional properties:
> + - extcon : external connector for VBUS and IDPIN changes detection,

   ID pin, maybe?

> +   needed when supports dual-role mode.
> + - vbus-supply : reference to the VBUS regulator, needed when supports
> +   dual-role mode.
> + - power-domains   : a phandle to USB power domain node to control USB's
> +   MTCMOS
[...]

MBR, Sergei