| What: /sys/class/spi_master/spiB/new_device |
| Date: July 2026 |
| KernelVersion: 7.3 |
| Contact: linux-spi@vger.kernel.org |
| Description: (WO) Instantiate a new SPI device on bus B, where B |
| is the bus number (0, 1, 2, ...). Takes parameters |
| in the format: |
| |
| <modalias> <chip_select> [<max_speed_hz> [<mode>]] |
| |
| where modalias is the driver name, chip_select is the |
| CS line number, and max_speed_hz and mode are optional. |
| |
| The device can later be removed with delete_device. |
| |
| Only devices created via this interface can be removed |
| with delete_device; platform and DT devices are not |
| affected. |
| |
| Example: |
| # echo spidev 0 > /sys/class/spi_master/spi0/new_device |
| # echo spidev 0 10000000 > /sys/class/spi_master/spi0/new_device |
| # echo spidev 0 10000000 3 > /sys/class/spi_master/spi0/new_device |
| |
| What: /sys/class/spi_master/spiB/delete_device |
| Date: July 2026 |
| KernelVersion: 7.3 |
| Contact: linux-spi@vger.kernel.org |
| Description: (WO) Remove a SPI device previously created via |
| new_device. Takes a single parameter: the chip select |
| number of the device to remove. |
| |
| Example: |
| # echo 0 > /sys/class/spi_master/spi0/delete_device |
