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The M.2 slot's 3.3V supply rail is GPIO-controlled > via a TCA9538 I/O expander on I2C4. > > The M.2 E key slot hosts a WLAN card connected over PCIe and a Bluetooth > device connected over UART. Model the connector using the > pcie-m2-e-connector binding, wiring the PCIe root port and UART5 for > the respective interfaces. > > Signed-off-by: Krishna Chaitanya Chundru > --- Reviewed-by: Konrad Dybcio Konrad