# # Multiplexer devices # menuconfig MULTIPLEXER tristate "Multiplexer subsystem" help Multiplexer controller subsystem. Multiplexers are used in a variety of settings, and this subsystem abstracts their use so that the rest of the kernel sees a common interface. When multiple parallel multiplexers are controlled by one single multiplexer controller, this subsystem also coordinates the multiplexer accesses. To compile the subsystem as a module, choose M here: the module will be called mux-core. if MULTIPLEXER config MUX_GPIO tristate "GPIO-controlled Multiplexer" depends on GPIOLIB || COMPILE_TEST help GPIO-controlled Multiplexer controller. The driver builds a single multiplexer controller using a number of gpio pins. For N pins, there will be 2^N possible multiplexer states. The GPIO pins can be connected (by the hardware) to several multiplexers, which in that case will be operated in parallel. To compile the driver as a module, choose M here: the module will be called mux-gpio. endif