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Piccoli" , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, phone-devel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, linux@mainlining.org Subject: Re: [PATCH 4/6] arm64: dts: qcom: sm6125-xiaomi-ginkgo: Fix reserved gpio ranges Date: Tue, 13 Jan 2026 14:13:36 +0000 Message-ID: <20260113141342.11057-1-nathbappai@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Tue, 13 Jan 2026 10:45:02 +0100 Konrad Dybcio wrote: > I was referring to the NFC eSE (embedded Secure Element) which usually > has a separate connection to the SoC Yes, gpio 0-4 are connected to NFC eSE and gpio 30-34 are for fingerprint scanner. Here is the list of reserved gpio and their functions according to the device's schematic. 0 - ESE_SPI_MISO 1 - ESE_SPI_MOSI 2 - ESE_SPI_SCLK 3 - ESE_SPI_CS_N 30 - FP_SPI_MISO 31 - FP_SPI_MOSI 32 - FP_SPI_SCLK 33 - FP_SPI_CS_N Though Redmi Note 8 does not have NFC, kernel crashes if 0-4 gpios are not reserved. Tested-by: Biswapriyo Nath Thanks.