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Thu, 03 Sep 2026 00:55:59 -0700 (PDT) X-Received: by 2002:a17:90b:1b47:b0:398:e6b6:acc2 with SMTP id 98e67ed59e1d1-39aee084eddmr14851270a91.12.1788422158960; Thu, 03 Sep 2026 00:55:58 -0700 (PDT) Received: from [10.64.68.32] ([114.94.8.21]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39b083e6e3asm4054175a91.2.2026.09.03.00.55.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Sep 2026 00:55:58 -0700 (PDT) Message-ID: Date: Thu, 3 Sep 2026 15:55:51 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer To: Konrad Dybcio , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, tingwei.zhang@oss.qualcomm.com, jie.gan@oss.qualcomm.com, Guodong Xu References: <20260803132753.994619-1-xin.liu@oss.qualcomm.com> <049be278-8958-4d04-8501-7fb60d2169cc@oss.qualcomm.com> From: Xin Liu In-Reply-To: <049be278-8958-4d04-8501-7fb60d2169cc@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=YcmNIQRf c=1 sm=1 tr=0 ts=6a992810 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=Uz3yg00KUFJ2y2WijEJ4bw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=nF2vwnYNiXGi8mvl9yQA:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAzMDA2OSBTYWx0ZWRfX/cPADM7vOi1i fKwQhZctF7lIaXKh1KzpbHZAjj5YygyjRf88ZsOhNV5n68nXu3M5iHVURjohBGzPvhz94fDrOBp EsEO/HxfMP22Func8CrjZCwEaXDbjVY= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAzMDA2OSBTYWx0ZWRfXwZkEnJ7vqPaz sHWasEPMhviyOkBJu27yoBwGDgLglql0BPp4YVygym+ToBUUG4B71rKr+fJuc7qSrX24ogoP0QI q9o8FUCi03BTHJoxyhBSdbAFFfVI9k4v0SB1+zo+0vcjFydOrJML6Nqu9TMEMYvIFqRmLPV14kN MbFNHD3V+ekG1o3SBHqWkFe7JSUz/Sa0EUAUqXTidvHCJyRBMjPC3c4/sk4wKPLvjLrqRRS3XQW bwW2WDz8skZlnlgo5wHCKsQrusPTp199j5+YKhLB5D6+kuh097ZIWG65bJ24aFOVUqcPlg07Dz+ YIG2rkcGk6Rs9dDEwt7nWkFsDZfyoLWkXHw1CGAx2Wu++SDHZSse1H020I/ZWk60TYSlLNgWx9x pNEVzZChhsQU/q1/RxX2XMb4RgQQUnpUVUIVdt5ueKjkMPHDVQn2nnhc+SZ36yJkkuh+qkTyJBm mVzldVQY8KrgN83/j8Q== X-Proofpoint-GUID: XROgsbwskP6wvX1iFBd8aKrNEkeQulAn X-Proofpoint-ORIG-GUID: XROgsbwskP6wvX1iFBd8aKrNEkeQulAn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-03_02,2026-09-02_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 priorityscore=1501 lowpriorityscore=0 adultscore=0 phishscore=0 impostorscore=0 spamscore=0 suspectscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609030069 On 8/18/2026 6:49 PM, Konrad Dybcio wrote: > On 8/3/26 3:27 PM, Xin Liu wrote: >> The Hamoa IoT EVK hardware design uses a Parade PS8830 retimer on >> I2C3 for USB Type-C port 0. Describe the retimer and route typec0 >> through it to enable USB 3.0 SuperSpeed and DisplayPort Alt Mode. >> >> Supply the PS8830 from the existing vreg_rtmr0_* rails and remove >> their stale "Left unused" annotation. >> >> The FSUSB42 SBU mux chip is present on the PCB but with all signal >> lines unconnected (NC), so remove the fsusb42 node and its pinctrl >> group. > [...] > >> +&i2c3 { >> + clock-frequency = <400000>; >> + status = "okay"; >> + >> + typec-mux@8 { >> + compatible = "parade,ps8830"; >> + reg = <0x08>; >> + >> + clocks = <&rpmhcc RPMH_RF_CLK4>; > On other boards, the port0 retimer normally takes RF_CLK3 - have > you verified this bit? > > Konrad Hi Konrad Thanks for pointing this out. I re-checked the schematic and confirmed that the Type-C0 retimer refclk is provided by a board-level external XO/local XTAL, not by PMK/RPMH. So RPMH_RF_CLK4 is not the correct clock source. Since the binding requires a clock, I will model the board-level XO as a fixed-clock and use it for the PS8830/PS8833 retimer node in v3. Thanks, XIN