if TOSHIBA_RBTX4938 comment "Multiplex Pin Select" choice prompt "PIO[58:61]" default TOSHIBA_RBTX4938_MPLEX_PIO58_61 config TOSHIBA_RBTX4938_MPLEX_PIO58_61 bool "PIO" config TOSHIBA_RBTX4938_MPLEX_NAND bool "NAND" config TOSHIBA_RBTX4938_MPLEX_ATA bool "ATA" endchoice config TX4938_NAND_BOOT depends on EXPERIMENTAL && TOSHIBA_RBTX4938_MPLEX_NAND bool "NAND Boot Support (EXPERIMENTAL)" help This is only for Toshiba RBTX4938 reference board, which has NAND IPL. Select this option if you need to use NAND boot. endif