linux-kernel - RE: [PATCH v4 2/2] dt-bindings: usb: snps,dwc3: Add the compatible name 'snps,dwc3-rtk-soc'

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Date:   Tue, 2 May 2023 10:37:39 +0000
From:   Stanley Chang[昌育德] 
        <stanley_chang@...ltek.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Felipe Balbi <balbi@...nel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v4 2/2] dt-bindings: usb: snps,dwc3: Add the compatible name 'snps,dwc3-rtk-soc'

Hi Krzysztof,

> >>>> On 02/05/2023 07:04, Stanley Chang wrote:
> >>>>> Add a new compatible name 'snps,dwc3-rtk-soc' of DT for realtek
> >>>>> dwc3 core to adjust the global register start address
> >>>>>
> >>>>> The RTK DHC SoCs were designed, the global register address offset
> >>>>> at
> >>>>
> >>>> What are: "RTK" and "DHC"? These are manufactured by Synopsys as
> >>>> you suggest in the patch?
> >>>
> >>> RTK is Realtek.
> >>> DHC is the department name in Realtek and the abbreviation of the
> >>> Digital
> >> Home Center.
> >>> The USB controller of RTK DHC SoCs used the DWC3 IP of Synopsys.
> >>
> >> Then entire compatible is not correct. Vendor is Realtek not Synopsys.
> >> DHC is not even device name. Use real device names.
> >
> > So, can we use the compatible name as 'realtek,dwc3' ?
> 
> dwc3 is not a real device name for Realtek.

We still use dwc3 IP in Realtek's SoC. Why is the name "dwc3" inappropriate?

Should compatibility names use the SoC name?
For example, our SoC name
RTD129x, RTD139x, RTD161x, RTD161xB, etc.
Should we use these names in compatible names?
"realtek, rtd129x", "realtek, rtd139x", "realtek, rtd161x"...etc.

Thanks,
Stanley