config SPI_GPIO_CUSTOM tristate "Custom GPIO-based SPI driver" depends on GENERIC_GPIO select SPI_GPIO help This is an SPI driver to register 1 to 4 custom SPI buses using GPIO lines. Each bus can have up to 8 slaves. The devices will be exposed to userspace as /dev/spidevX.X This module is maily intended to interface microcontrollers and other SPI devices without a specific kernel driver. This support is also available as a module. If so, the module will be called spi-gpio-custom.