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[199.106.103.52]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3142a02b7f2sm40346757eec.13.2026.07.20.18.51.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jul 2026 18:51:54 -0700 (PDT) From: Wei Deng To: Bartosz Golaszewski Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Manivannan Sadhasivam Subject: Re: [PATCH 2/3] power: sequencing: pcie-m2: Match WCN6855 and WCN7851 UART BT variants by subdevice ID Date: Tue, 21 Jul 2026 07:21:50 +0530 Message-Id: <20260721015150.60198-1-wei.deng@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzIxMDAxNiBTYWx0ZWRfX5nYqlxtx9uwp LJwxXTFYWp2Pm6LDnxr4czuhrfwgZs+W2pE62M/TLysqqoeE2lLZkfAup3jTSZueLr2yWlkQR1a IUJYUIAj2VuUFqRxAqVoBRok+sn4tf16IsNk9psrBh/bg8DCPGa+J7jtNst1e2lM/eoZ6uDOmAF bq1Z7gH0lwB4YOHnTUhsgNSJ1G6NQweI2FDYweBLmDzxaNP39bKIiL0QzmuA75aPJiuXI8xi0GP GhP4VudKTE4HE6IX1f4v/NmlwyYTfzDT+2gJ+EcZNaJPCVOU+PQgv/EQUhplj3TuZkmnfU31z1k 6vXzDt8EEAHRxSFthGOV4ExQ7+vsjYyn/j2Uham5yBZMk/lEASjOkHjpoBM/GwiUamoSwyQS1oT UXQgAmlH27sWuHG7UYHsgaYoskW8Qg90yAi0trag8eTCvzekuxs9PZtcU4JWM8VHpEa62JDEdS1 0DGTNnVWe3xgZ7zoQjg== X-Proofpoint-ORIG-GUID: E6_H5zHPj9Mj6tdEkJNsr-HXZ7LznDNP X-Proofpoint-GUID: E6_H5zHPj9Mj6tdEkJNsr-HXZ7LznDNP X-Authority-Analysis: v=2.4 cv=M5F97Sws c=1 sm=1 tr=0 ts=6a5ed0bb cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=b9+bayejhc3NMeqCNyeLQQ==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=VwQbUJbxAAAA:8 a=cm27Pg_UAAAA:8 a=EUspDBNiAAAA:8 a=6OLaB2FWHzg5-YzQX7YA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzIxMDAxNiBTYWx0ZWRfX68UBPc6gzRi6 PAIfO+FAAPe4iqC50xBN159zXaO1GXOWN/3bB4oWSC2qZHzI6h4xnagXcsInZeGimzYmk2bIPWu igQ1cWJkF8rKXadOV/BD5y6WOYM31hU= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-20_06,2026-07-20_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 spamscore=0 bulkscore=0 impostorscore=0 phishscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607210016 Hi Bart, On Thu, 16 Jul 2026 06:56:36 -0700, Bartosz Golaszewski wrote: > On Thu, 9 Jul 2026 09:29:41 +0200, Wei Deng said: > > The WCN6855 and WCN7851 combo chips are available in M.2 card variants > > that differ by their BT interface: some expose BT over UART while others > > expose BT over USB. Both variants use the same PCIe device ID for the > > WiFi interface, distinguished only by their sub-system device ID. > > > > Narrow the matches to UART variants only by using PCI_DEVICE_SUB with > > their respective sub-system IDs. USB variants no longer match the table > > and will be handled separately to deassert W_DISABLE2# for USB BT > > enumeration. > > > > Signed-off-by: Wei Deng > > Do you want me to queue this independently from patch 3/3? Yes, this can be queued independently. I'll send a new patch with an updated commit message — the previous one mentioned "handled separately to deassert W_DISABLE2# for USB BT enumeration" which was tied to Patch 3/3. Since we are dropping Patch 3 in favor of Chen-Yu Tsai's USB hub power sequencing series [1], the commit message should just say that USB variants no longer trigger UART serdev creation. [1] https://lore.kernel.org/all/20260715085348.3457359-1-wenst@chromium.org/ -- Best Regards, Wei Deng