gpmc_register_read
val = gpmc_register_read(sc, GPMC_CONFIG);
while (!(gpmc_register_read(sc, GPMC_STATUS) & WAIT0)) {
val = gpmc_register_read(sc, GPMC_ECC_CONTROL);
val = gpmc_register_read(sc, GPMC_ECC_SIZE_CONFIG);
val = gpmc_register_read(sc, GPMC_ECC1_RESULT);
val = gpmc_register_read(sc, GPMC_ECC_CONFIG);
val = gpmc_register_read(sc, GPMC_ECC_CONTROL);
val = gpmc_register_read(sc, GPMC_ECC_CONFIG);