Austrian Microsystems AS3935 Franklin lightning sensor device driver Required properties: - compatible: must be "ams,as3935" - reg: SPI chip select number for the device - spi-max-frequency: specifies maximum SPI clock frequency - spi-cpha: SPI Mode 1. Refer to spi/spi-bus.txt for generic SPI slave node bindings. - interrupts : the sole interrupt generated by the device Refer to interrupt-controller/interrupts.txt for generic interrupt client node bindings. Optional properties: - ams,tuning-capacitor-pf: Calibration tuning capacitor stepping value 0 - 120pF. This will require using the calibration data from the manufacturer. - ams,nflwdth: Set the noise and watchdog threshold register on startup. This will need to set according to the noise from the MCU board, and possibly the local environment. Refer to the datasheet for the threshold settings. Example: as3935@0 { compatible = "ams,as3935"; reg = <0>; spi-max-frequency = <400000>; spi-cpha; interrupt-parent = <&gpio1>; interrupts = <16 1>; ams,tuning-capacitor-pf = <80>; ams,nflwdth = <0x44>; };