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Date:   Thu, 14 Apr 2022 05:54:31 +0900
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Subject: Re: [PATCH v2 1/2] dt-bindings: devfreq: mediatek: Add mtk cci
 devfreq dt-bindings
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To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Johnson Wang <johnson.wang@mediatek.com>,
        cw00.choi@samsung.com, krzk+dt@kernel.org, robh+dt@kernel.org,
        kyungmin.park@samsung.com
Cc:     khilman@kernel.org, linux-pm@vger.kernel.org,
        linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, jia-wei.chang@mediatek.com,
        Project_Global_Chrome_Upstream_Group@mediatek.com
References: <20220408052150.22536-1-johnson.wang@mediatek.com>
 <20220408052150.22536-2-johnson.wang@mediatek.com>
 <855d7daa-45d1-d6d8-32bd-51778cf58392@linaro.org>
 <fe7d2b878c18a42ff36ebd9911ecb562fe29c953.camel@mediatek.com>
 <39152c86-ca11-2792-6b25-ae55ffb47b09@linaro.org>
From:   Chanwoo Choi <cwchoi00@gmail.com>
In-Reply-To: <39152c86-ca11-2792-6b25-ae55ffb47b09@linaro.org>
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On 22. 4. 12. 18:17, Krzysztof Kozlowski wrote:
> On 11/04/2022 14:10, Johnson Wang wrote:
>>> Also please put it in the "interconnect" directory.
>>>
>>
>> I don't really know about "interconnect".
>> However, it looks like a Linux framework about data transfer and "NoC".
>>
>> While this cci driver is more like a power managment which is
>> responsible for adjusting voltages and frequencies.
>> In my opinion, "devfreq" should be more suitable.
>>
>> Please correct me if my understanding is wrong.
> 
> devfreq is a Linux mechanism, not a real device/hardware. We try to put
> the bindings in directories/subsystems matching the hardware, therefore
> devfreq is not appropriate.
> 
> Whether interconnect - or other subsystem - is appropriate, I am not
> sure. To me this looks exactly like bus bandwidth management and you
> even use "interconnect" in several places. So interconnect matches.

I think that 'Documentation/devicetree/bindings/arm/mediatek' is proper.

-- 
Best Regards,
Samsung Electronics
Chanwoo Choi