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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b72bdbce8f9sm1072113366b.2.2025.11.10.03.49.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Nov 2025 03:49:59 -0800 (PST) Message-ID: <28ffece5-29b7-4d6f-a6cf-5fdf3b8259ef@oss.qualcomm.com> Date: Mon, 10 Nov 2025 12:49:57 +0100 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] arm64: dts: qcom: lemans-evk: Enable Bluetooth support To: Wei Deng , 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, linux-bluetooth@vger.kernel.org, stable@vger.kernel.org, cheng.jiang@oss.qualcomm.com, quic_jiaymao@quicinc.com, quic_chezhou@quicinc.com, quic_shuaz@quicinc.com References: <20251110055709.319587-1-wei.deng@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20251110055709.319587-1-wei.deng@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: oI1WMAPKyYcSyhCKA4wPvm9wEcEWY6EE X-Authority-Analysis: v=2.4 cv=PL4COPqC c=1 sm=1 tr=0 ts=6911d169 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=b7yh_2p2DTCkp5fgmd0A:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTEwMDEwMyBTYWx0ZWRfXzC5oEplg98lS mSsTrJuX9NhaYQS0R8Q6UhPs+AIowYYjh6b2YvCIEvgLibBxIbO8mFh5Y7kYzFc7NCGh+7G0Tvg trACFg09gKlfdiB52DgckUGD6Dut95gYtK/gYIUHapVHGiee2bU6Xm+T3ALWnzPc5TwxB2vVZlb QFtBMsE0jCyKJPaPYk83HHsv7Paoq9LlRRyraxJeC2FpkidfsLeEa+E81MfhLA899g8cfIa6HXZ 5gs5Gq0mI1L2Ikhq9p/J2Qmb53UPHrBLiGYga7gbZYPpIEMDufgt0jgqmOOJ5SIssAOCZ43pd3R BybZCakdJc9hOAbNp4Z+9BXr706VZ+dOJAvxsR7EC+jk4waqxWDTnPZGP5DTjWn9kHLUB9YkSNh L1AsvxdD9CkHJJSnOS4Jcz2bmIEJxg== X-Proofpoint-ORIG-GUID: oI1WMAPKyYcSyhCKA4wPvm9wEcEWY6EE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-10_04,2025-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 malwarescore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 adultscore=0 bulkscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511100103 On 11/10/25 6:57 AM, Wei Deng wrote: > There's a WCN6855 WiFi/Bluetooth module on an M.2 card. To make > Bluetooth work, we need to define the necessary device tree nodes, > including UART configuration and power supplies. > > Since there is no standard M.2 binding in the device tree at present, > the PMU is described using dedicated PMU nodes to represent the > internal regulators required by the module. > > The 3.3V supply for the module is assumed to come directly from the > main board supply, which is 12V. To model this in the device tree, we > add a fixed 12V regulator node as the DC-IN source and connect it to > the 3.3V regulator node. > > Signed-off-by: Wei Deng > --- [...] > &apps_rsc { > @@ -627,6 +708,22 @@ &qupv3_id_2 { > status = "okay"; > }; > > +&qup_uart17_cts { > + bias-disable; > +}; > + > +&qup_uart17_rts { > + bias-pull-down; > +}; > + > +&qup_uart17_tx { > + bias-pull-up; > +}; > + > +&qup_uart17_rx { > + bias-pull-down; > +}; This is notably different than all other platforms' bluetooth pin settings - for example pulling down RX sounds odd, since UART signal is supposed to be high at idle see hamoa.dtsi : qup_uart14_default as an example Konrad