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[188.155.201.27]) by smtp.gmail.com with ESMTPSA id g2-20020a50bf42000000b0041cc5233252sm13533827edk.57.2022.04.12.02.17.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 12 Apr 2022 02:17:07 -0700 (PDT) Message-ID: <39152c86-ca11-2792-6b25-ae55ffb47b09@linaro.org> Date: Tue, 12 Apr 2022 11:17:06 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH v2 1/2] dt-bindings: devfreq: mediatek: Add mtk cci devfreq dt-bindings Content-Language: en-US To: Johnson Wang , 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> From: Krzysztof Kozlowski In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-3.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,RDNS_NONE,SPF_HELO_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Best regards, Krzysztof