GPMC_ECC_CONTROL
val = gpmc_register_read(sc, GPMC_ECC_CONTROL);
gpmc_register_write(sc, GPMC_ECC_CONTROL, val);
gpmc_register_write(sc, GPMC_ECC_CONTROL, val);
val = gpmc_register_read(sc, GPMC_ECC_CONTROL);
gpmc_register_write(sc, GPMC_ECC_CONTROL, val);