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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
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