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MTD: Change cfi-mtd to accept non-uniform sector sizes

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With this patch non-uniform NOR FLASH chips (chips with multiple erase
regions) can be exported via the cfi-mtd layer and therefor used by UBI.
We select the largest sector size as erasesize. The cfi driver will make
sure that the smaller sectors are handled correctly.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2009-03-18 11:17:37 +01:00
parent 4d9eab89b3
commit f8e2b3107e
1 changed files with 4 additions and 14 deletions
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18
drivers/mtd/cfi_mtd.c
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@ -142,22 +142,12 @@ static int cfi_mtd_set_erasesize(struct mtd_info *mtd, flash_info_t *fi)
int sect_size = 0;
int sect;
/*
* Select the largest sector size as erasesize (e.g. for UBI)
*/
for (sect = 0; sect < fi->sector_count; sect++) {
if (!sect_size) {
if (flash_sector_size(fi, sect) > sect_size)
sect_size = flash_sector_size(fi, sect);
continue;
}
if (sect_size != flash_sector_size(fi, sect)) {
sect_size = 0;
break;
}
}
if (!sect_size) {
puts("cfi-mtd: devices with multiple sector sizes are"
"not supported\n");
return -EINVAL;
}
mtd->erasesize = sect_size;