SW1 is the white push botton on the FoxG20 board close to pin J7-40. It is wired to PC4, pulled up to 1.8 volts when not depressed (normal state). It uses the gpio-keys device in board-foxg20.c [if CONFIG_KEYBOARD_GPIO is defined in kernel build] Try: evtest /dev/input/event0 and press SW1 Doug Gilbert 20110829