to remove SD drive module
] rmmod mtk_sd
and get GPIO1-MODE register value (ref. MT7688 page 61, bit[11:10] , b00 -> b01)
] devmem 0x10000060 w
] 0x50054045 (example)
set SD -> GPIO mode
] devmem 0x10000060 32 0x50054445
and try GPIO22~29 access...