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1What: /sys/bus/iio/devices/iio:deviceX/in_voltage_spi_clk_freq2KernelVersion: 4.143Contact: arnaud.pouliquen@st.com4Description:5 For audio purpose only.6 7 Used by audio driver to set/get the spi input frequency.8 9 This is mandatory if DFSDM is slave on SPI bus, to10 provide information on the SPI clock frequency during runtime11 Notice that the SPI frequency should be a multiple of sample12 frequency to ensure the precision.13 14 if DFSDM input is SPI master:15 16 Reading SPI clkout frequency,17 error on writing18 19 If DFSDM input is SPI Slave:20 21 Reading returns value previously set.22 Writing value before starting conversions.23