config BR2_PACKAGE_SPIDEV_TEST bool "spidev_test" help SPI testing utility (using spidev driver). This package builds and installs the userspace 'spidev_test' command. It is up to the user to ensure that the kernel configuration has all suitable options enabled to allow a proper operation of 'spidev_test'. The version used is based on your toolchain headers version, if it's older than 3.15 then 3.0 is used, otherwise 3.15 is used. This means you won't have quad-pumped SPI support if your toolchain is too old. https://www.kernel.org/doc/html/latest/spi/index.html