| What: /sys/bus/iio/devices/iio:deviceX/in_voltage_spi_clk_freq |
| KernelVersion: 4.14 |
| Contact: arnaud.pouliquen@st.com |
| Description: |
| For audio purpose only. |
| Used by audio driver to set/get the spi input frequency. |
| This is mandatory if DFSDM is slave on SPI bus, to |
| provide information on the SPI clock frequency during runtime |
| Notice that the SPI frequency should be a multiple of sample |
| frequency to ensure the precision. |
| if DFSDM input is SPI master |
| Reading SPI clkout frequency, |
| error on writing |
| If DFSDM input is SPI Slave: |
| Reading returns value previously set. |
| Writing value before starting conversions. |