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Mon, 29 Jun 2026 03:24:52 -0700 (PDT) X-Received: by 2002:a05:6a00:8c11:b0:842:672e:7b5d with SMTP id d2e1a72fcca58-845b39f9acdmr15279454b3a.17.1782728691963; Mon, 29 Jun 2026 03:24:51 -0700 (PDT) Received: from [10.217.222.146] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8477594750esm2435981b3a.21.2026.06.29.03.24.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 29 Jun 2026 03:24:51 -0700 (PDT) Message-ID: <86321e30-2bee-41bb-9d63-d0e6ab4154db@oss.qualcomm.com> Date: Mon, 29 Jun 2026 15:54:44 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 5/6] arm64: dts: qcom: monaco: Add OPP-table for ICE UFS and ICE eMMC nodes To: Konrad Dybcio , Abhinaba Rakshit Cc: Bjorn Andersson , Konrad Dybcio , Manivannan Sadhasivam , "James E.J. Bottomley" , "Martin K. Petersen" , Adrian Hunter , Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neeraj Soni , Harshal Dev , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org References: <20260609-enable-ice-clock-scaling-v11-0-1cebc8b3275b@oss.qualcomm.com> <20260609-enable-ice-clock-scaling-v11-5-1cebc8b3275b@oss.qualcomm.com> Content-Language: en-US From: Kuldeep Singh In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjI5MDA4NCBTYWx0ZWRfX/CBWLKaI/CsS G0XW3BJB5SwHy4mgNAb+VnB12mYL8JyoiLujUmoR6BhMN5MjOSvpDKsXOiV6jzxzM/nFM76Yca3 EJXP7vuzG+bAmH7K2N9D7pQqI+GtZJdBDiAArPeLNDBpEMs+yOUUADEO8QQq98Nb4UEe6VKHzxQ 74EJgwML/CI/ECocuSlAFKB7o2RJQJwg2uSu2McPJe6WWLShT7MxGISbqqqC+Hb6F5ICL0zgZNk Ubt8eg9hoDk1Kl5Zzq9Xhimz393mtuKrLGTQy/DK0+zC95TuxQjPaxmKFiCAmSAaJIJd+DNh3HP yIZeoyuNH77PMAvIGofEJap87xsvkcjJ78jDG5SZrj0avwKwgSS7MEcoSDH5OwC2JztEUksAZoA /zDW86+svgMl0mToP8qSS6H+gPAhuj7PHxhHEVmS4bAHMTEa9WqVoFCHLuVbetGUcwgxFk9lAoM AI1tuCLRlCeDUsmwnCA== X-Authority-Analysis: v=2.4 cv=R58z39RX c=1 sm=1 tr=0 ts=6a4247f5 cx=c_pps a=rEQLjTOiSrHUhVqRoksmgQ==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=nI5agbhGWDarof4E6psA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=2VI0MkxyNR6bbpdq8BZq:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjI5MDA4NCBTYWx0ZWRfX4pcm6LsmDZQH kjVhB0s/4o2g+rWwjajGtK5g1yl16rxECOQIM3ZS9pC32qo00D6wylmjUNEVVLz2noNT8dqmx0q +q7gknP9RpAXhLUoysFS83r4mP2CCdQ= X-Proofpoint-ORIG-GUID: kZ-hr5B2XiTXFpC5pCGStPlAng9ZikSa X-Proofpoint-GUID: kZ-hr5B2XiTXFpC5pCGStPlAng9ZikSa X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-29_02,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 suspectscore=0 phishscore=0 clxscore=1015 adultscore=0 malwarescore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606290084 >>> Since 75 MHz and 201.6 Mhz require the same power level, is the former >>> OPP any useful? >> >> Yes, both use the same power requirements. However recommended by the ICE team, >> the DT should include all opp/freq supported by the hardware. > > Is there any reason at all where the OS would prefer the lower OPP? > > I think you at one point mentioned some dependency vs the storage > controller's clock frequency I think Abhinaba captured all possible frequencies(even lowest ones) as what the hardware currently describes. It's upto storage controller running frequency and let it scale ice clocks to higher/lower to it's max capabilities. Describing hardware based information also avoid revisiting DTs at later moment. -- Regards Kuldeep