linux-kernel - RE: [PATCH 3/3] dt-bindings: usb: dwc2: add compatible "intel,socfpga-stratix10-hsotg"

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Message-ID: <PH0PR11MB5191867DF205B301A8FD701EF139A@PH0PR11MB5191.namprd11.prod.outlook.com>
Date:   Wed, 19 Jul 2023 09:49:24 +0000
From:   "Li, Meng" <Meng.Li@...driver.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "dinguyen@...nel.org" <dinguyen@...nel.org>,
        "hminas@...opsys.com" <hminas@...opsys.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 3/3] dt-bindings: usb: dwc2: add compatible
 "intel,socfpga-stratix10-hsotg"



> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Sent: Wednesday, July 19, 2023 4:59 PM
> To: Li, Meng <Meng.Li@...driver.com>; gregkh@...uxfoundation.org;
> robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org; conor+dt@...nel.org;
> dinguyen@...nel.org; hminas@...opsys.com; linux-usb@...r.kernel.org;
> devicetree@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Subject: Re: [PATCH 3/3] dt-bindings: usb: dwc2: add compatible "intel,socfpga-
> stratix10-hsotg"
> 
> CAUTION: This email comes from a non Wind River email account!
> Do not click links or open attachments unless you recognize the sender and
> know the content is safe.
> 
> On 19/07/2023 10:45, Li, Meng wrote:
> >
> >
> >> -----Original Message-----
> >> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> >> Sent: Wednesday, July 19, 2023 2:39 PM
> >> To: Li, Meng <Meng.Li@...driver.com>; gregkh@...uxfoundation.org;
> >> robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org;
> >> robh+conor+dt@...nel.org;
> >> dinguyen@...nel.org; hminas@...opsys.com; linux-usb@...r.kernel.org;
> >> devicetree@...r.kernel.org
> >> Cc: linux-kernel@...r.kernel.org
> >> Subject: Re: [PATCH 3/3] dt-bindings: usb: dwc2: add compatible
> >> "intel,socfpga- stratix10-hsotg"
> >>
> >> CAUTION: This email comes from a non Wind River email account!
> >> Do not click links or open attachments unless you recognize the
> >> sender and know the content is safe.
> >>
> >> On 19/07/2023 04:55, Meng Li wrote:
> >>> Add the compatible "intel,socfpga-stratix10-hsotg" to the DWC2
> >>> implementation, because the Stratix DWC2 implementation does not
> >>> support clock gating. This compatible is used with generic snps,dwc2.
> >>>
> >>> Signed-off-by: Meng Li <Meng.Li@...driver.com>
> >>
> >> Missing changelog, missing versioning. This is v3 or v4.
> >>
> >>> ---
> >>>  Documentation/devicetree/bindings/usb/dwc2.yaml | 1 +
> >>>  1 file changed, 1 insertion(+)
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/usb/dwc2.yaml
> >>> b/Documentation/devicetree/bindings/usb/dwc2.yaml
> >>> index dc4988c0009c..f90094320914 100644
> >>> --- a/Documentation/devicetree/bindings/usb/dwc2.yaml
> >>> +++ b/Documentation/devicetree/bindings/usb/dwc2.yaml
> >>> @@ -51,6 +51,7 @@ properties:
> >>>                - amlogic,meson-g12a-usb
> >>>                - amlogic,meson-a1-usb
> >>>                - intel,socfpga-agilex-hsotg
> >>> +              - intel,socfpga-stratix10-hsotg
> >>
> >> So you just sent the same patch as before. I pointed you to the
> >> proper solution with compatibility.
> >>
> >
> > No. not the same.
> > I don't understand why SoC specific compatible "intel,socfpga-agilex-hsotg" is
> able to be added, but the SoC specific compatible "intel,socfpga-stratix10-hsotg"
> is not allowed.
> >
> > You said "Where is SoC specific compatible?"
> > Now, I add the SoC specific compatible "intel,socfpga-stratix10-hsotg", but
> why it is still not reasonable.
> 
> The compatible should be added, but I said they are compatible, so express it. I
> also gave you example of file which expresses it.
> 
> Why that compatible is not allowed alone? Because what we said here many,
> many times and because the doc I gave you which explains this.
> 

I had a look the doc ,and refer to rk3128.dtsi and commit 5032b269203287c17064d33c72be1ebf30c04a95.
So I think it needs to add " intel,socfpga-stratix10-hsotg" Documentation/devicetree/bindings/usb/dwc2.yaml.
But if you think it is not reasonable, could you please show what is your modification for the dwc2.yaml.

Thanks,
Limeng


> Best regards,
> Krzysztof