Steven Zedeck wrote:
First of all, I inherited much of this code, especially the NAND-related stuff. I've never needed to go into this portion of the code.
It seems we are using the mtd driver as all our files dealing with nand are in drivers/mtd/nand. The only place I see NAND_USE_FLASH_BBT being used is in nand_bbt.c in nand_default_bbt. I see this:
this->options |= NAND_USE_FLASH_BBT; return nand_scan_bbt (mtd, &agand_flashbased);
Is this what you are referring to?
No, I mean in the NAND driver for your specific hardware (fsl_elbc_nand.c, mxc_nand.c, ndfc_nand.c, etc).
Also, once we get the BBT created, does the code that loads Linux use that info ?
The BBT is created on the flash. Linux runs pretty much the same code as u-boot and will use the on-flash BBT if its NAND driver specifies NAND_USE_FLASH_BBT. This isn't about in-memory BBTs.
-Scott