Re: [U-Boot] [PATCH] [NAND] Add board_nand_init_tail to give board module a chance to init after NAND chip is scaned.

On Fri, Aug 08, 2008 at 10:06:03AM +0800, Hong Xu wrote:

Sometimes, board module needs to know some information about the NAND chip e.g. page size to continue it's initialization. This short patch give board module a chance to continue its initialization after the NAND chip is scaned.

[snip]

nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr; if (board_nand_init(nand) == 0) {

• if (nand_scan(mtd, 1) == 0) {
  

• if ((nand_scan(mtd, 1) == 0) && (board_nand_init_tail(nand) == 0)) {
  if (!mtd->name)
  	mtd->name = (char *)default_nand_name;
  

  } else

This doesn't give the board driver a chance to run before the bad block scan, though. The MTD code itself does (nand_scan_ident and nand_scan_tail, around which nand_scan is a wrapper), but the u-boot glue code doesn't currently let board drivers take advantage of that.

I'd like to transition away from having a centralized nand_init(), and instead have the board drivers call nand_scan*() themselves.

-Scott