| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | What: /sys/bus/iio/devices/iio:deviceX/in_voltage_spi_clk_freq |
| 2 | KernelVersion: 4.14 |
| 3 | Contact: arnaud.pouliquen@st.com |
| 4 | Description: |
| 5 | For audio purpose only. |
| 6 | Used by audio driver to set/get the spi input frequency. |
| 7 | This is mandatory if DFSDM is slave on SPI bus, to |
| 8 | provide information on the SPI clock frequency during runtime |
| 9 | Notice that the SPI frequency should be a multiple of sample |
| 10 | frequency to ensure the precision. |
| 11 | if DFSDM input is SPI master |
| 12 | Reading SPI clkout frequency, |
| 13 | error on writing |
| 14 | If DFSDM input is SPI Slave: |
| 15 | Reading returns value previously set. |
| 16 | Writing value before starting conversions. |