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Date:   Wed, 19 Jul 2023 11:52:36 +0200
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Subject: Re: [PATCH 3/3] dt-bindings: usb: dwc2: add compatible
 "intel,socfpga-stratix10-hsotg"
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To:     "Li, Meng" <Meng.Li@windriver.com>,
        "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
        "robh+dt@kernel.org" <robh+dt@kernel.org>,
        "krzysztof.kozlowski+dt@linaro.org" 
        <krzysztof.kozlowski+dt@linaro.org>,
        "conor+dt@kernel.org" <conor+dt@kernel.org>,
        "dinguyen@kernel.org" <dinguyen@kernel.org>,
        "hminas@synopsys.com" <hminas@synopsys.com>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Cc:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
References: <20230719025509.3007986-1-Meng.Li@windriver.com>
 <20230719025509.3007986-4-Meng.Li@windriver.com>
 <488835c0-e08e-c0cc-abac-192f658b093f@linaro.org>
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 <PH0PR11MB5191867DF205B301A8FD701EF139A@PH0PR11MB5191.namprd11.prod.outlook.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <PH0PR11MB5191867DF205B301A8FD701EF139A@PH0PR11MB5191.namprd11.prod.outlook.com>
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On 19/07/2023 11:49, Li, Meng wrote:
> 
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
>> Sent: Wednesday, July 19, 2023 4:59 PM
>> To: Li, Meng <Meng.Li@windriver.com>; gregkh@linuxfoundation.org;
>> robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; conor+dt@kernel.org;
>> dinguyen@kernel.org; hminas@synopsys.com; linux-usb@vger.kernel.org;
>> devicetree@vger.kernel.org
>> Cc: linux-kernel@vger.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@linaro.org>
>>>> Sent: Wednesday, July 19, 2023 2:39 PM
>>>> To: Li, Meng <Meng.Li@windriver.com>; gregkh@linuxfoundation.org;
>>>> robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org;
>>>> robh+conor+dt@kernel.org;
>>>> dinguyen@kernel.org; hminas@synopsys.com; linux-usb@vger.kernel.org;
>>>> devicetree@vger.kernel.org
>>>> Cc: linux-kernel@vger.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@windriver.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.

Open the DTSI and look at compatibles. Now open the driver and look at
the compatibles - surprise, there is no rockchip,rk3128-usb! Now open
the binding and look how it is done.

> But if you think it is not reasonable, could you please show what is your modification for the dwc2.yaml.

Open the binding - it is already there.

I bet there is someone in Windriver who does Linux and can help here as
well, none of existing code is working for you as an example?

Best regards,
Krzysztof