Forum Post: RE: Confusion regarding BLOCK size in NAND chip and NAND sector size in u-boot

Hi Titus,

Thank you for that reply,

My uboot common/cmd_nand.c code also loks similar to your uboot code.

But interestingy its not printing sectorsize as 512Kib.

int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])  {  int i, dev, ret = 0;  ulong addr, off;  size_t size;  char *cmd, *s;  nand_info_t *nand;  #ifdef CFG_NAND_QUIET  int quiet = CFG_NAND_QUIET;  #else  int quiet = 0;  #endif  const char *quiet_str = getenv("quiet");  /* at least two arguments please */  if (argc < 2)  goto usage;  if (quiet_str)  quiet = simple_strtoul(quiet_str, NULL, 0) != 0;  cmd = argv[1];  if (strcmp(cmd, "info") == 0) {  putc('\n');  for (i = 0; i < CFG_MAX_NAND_DEVICE; i++) {  if (nand_info[i].name)  printf("Device %d: %s, sector size %u KiB\n",        i, nand_info[i].name,        nand_info[i].erasesize >> 10);  }  return 0;  } 

I think they are doing rightshift to divide erase-block by 1024 to get the blocksize in "XXXkib" format.(purely for printing).

Thank you,

Regards,

Ankur