Gpio can not out low in physic

i change pn.01
in gpio dts
from gpio-input to gpio-output-high
in pinmux dts
pull low ,enable tristate, enable input
pull none,disable tristate,disable input

but i use /sys/class/gpio echo out > direction echo 0 > value ,and use multimeter to meature voltage ,but it is high

hello user49922,

could you please refer to developer guide, Changing the Pinmux.
you may see-also this section, Identifying the GPIO Number to check the GPIO allocation ranges for each GPIO group.