I have not tried yet...on which point is the problem (sysfile exists? Writable? Set but nothing happens?)
Have you read the comments below (some gpio not ready):
For GPIO22/GPIO23/GPIO24, we need to set EINTx_BOND_DIS to 1.
Using that functions you must call:
mt_gpio_mode pin mode #no idea,what mode is,maybe pwm,digital or similar
mt_gpio_dir pin dir #dir seems to be in or out
And then write/read the pin with "mt_gpio_out pin value" / "mt_gpio_in pin"
@garywang is that right? Can you explain mode?