fmxx
initr_nand (board_r.c)
nand_init (nand.c)
board_nand_init (fmxx_nfc.c)
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_GET_DRIVER(fmsh_nand_dt), &dev); 、、
priv = dev_get_priv(dev);
nand_init_chip(priv, i);
nand_set_controller_data
nand_init_chip ()