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Tue, 11 Nov 2025 04:37:52 -0800 (PST) X-Google-Smtp-Source: AGHT+IE0q+p3aApFgfFXqkFESOn3QG4Gvbs1jnstOAi+s6mYdXc9o8PALRvTBIKDC6BrvFmGzWhTuw== X-Received: by 2002:a17:902:d490:b0:25a:4437:dbb7 with SMTP id d9443c01a7336-29840fee954mr19743165ad.4.1762864672475; Tue, 11 Nov 2025 04:37:52 -0800 (PST) Received: from [10.233.17.95] ([114.94.8.21]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29651ccec04sm180165815ad.102.2025.11.11.04.37.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 Nov 2025 04:37:52 -0800 (PST) Message-ID: Date: Tue, 11 Nov 2025 20:37:42 +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] arm64: dts: qcom: lemans-evk: Enable Bluetooth support To: Dmitry Baryshkov Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , 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: Wei Deng In-Reply-To: Content-Type: text/plain; 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On 11/10/2025 8:39 PM, Dmitry Baryshkov wrote: > On Mon, Nov 10, 2025 at 11:27:09AM +0530, 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 > > Why do you need to assume anything? The M.2 interface provides a 3.3V supply, which originates from the main board’s 12V rail. To represent this power hierarchy in the device tree, add a fixed 12V regulator node as the DC-IN source and link it to the 3.3V regulator node. Will update commit message in the next patch. > >> 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 >> --- >> arch/arm64/boot/dts/qcom/lemans-evk.dts | 115 ++++++++++++++++++++++++ >> 1 file changed, 115 insertions(+) > > Why do you cc stable for this patch? I will remove the Cc: stable in the next patch. > -- Best Regards, Wei Deng