menuconfig JTAG tristate "JTAG support" help This provides basic core functionality support for JTAG class devices. Hardware that is equipped with a JTAG microcontroller can be supported by using this driver's interfaces. This driver exposes a set of IOCTLs to the user space for the following commands: SDR: Performs an IEEE 1149.1 Data Register scan SIR: Performs an IEEE 1149.1 Instruction Register scan. RUNTEST: Forces the IEEE 1149.1 bus to a run state for a specified number of clocks or a specified time period. If you want this support, you should say Y here. To compile this driver as a module, choose M here: the module will be called jtag. menuconfig JTAG_ASPEED tristate "Aspeed SoC JTAG controller support" depends on JTAG && HAS_IOMEM depends on ARCH_ASPEED || COMPILE_TEST help This provides a support for Aspeed JTAG device, equipped on Aspeed SoC 24xx and 25xx families. Drivers allows programming of hardware devices, connected to SoC through the JTAG interface. If you want this support, you should say Y here. To compile this driver as a module, choose M here: the module will be called jtag-aspeed.