162306a36Sopenharmony_ciWhat: /sys/bus/iio/devices/iio:deviceX/in_voltage_spi_clk_freq 262306a36Sopenharmony_ciKernelVersion: 4.14 362306a36Sopenharmony_ciContact: arnaud.pouliquen@st.com 462306a36Sopenharmony_ciDescription: 562306a36Sopenharmony_ci For audio purpose only. 662306a36Sopenharmony_ci 762306a36Sopenharmony_ci Used by audio driver to set/get the spi input frequency. 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci This is mandatory if DFSDM is slave on SPI bus, to 1062306a36Sopenharmony_ci provide information on the SPI clock frequency during runtime 1162306a36Sopenharmony_ci Notice that the SPI frequency should be a multiple of sample 1262306a36Sopenharmony_ci frequency to ensure the precision. 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci if DFSDM input is SPI master: 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci Reading SPI clkout frequency, 1762306a36Sopenharmony_ci error on writing 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci If DFSDM input is SPI Slave: 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci Reading returns value previously set. 2262306a36Sopenharmony_ci Writing value before starting conversions. 23