On Wed, 2014-11-05 at 12:39 +0900, Masahiro Yamada wrote:
[2] There is no good place to insert a callback to an SoC file. I need to write parameters such as page_size to hardware registers. (You can see my code, nand_denali_fixup() in arch/arm/cpu/armv7/uniphier/board_late_init.c)
The NAND init procedure of U-Boot is like this:
(1) board_nand_init() (drivers/mtd/nand/denali.c) (2) nand_scan_ident() (drivers/mtd/nand/nand_base.c) (3) nand_scan_tail() (drivers/mtd/nand/nand_base.c)
(2) detects the device size and set mtd->write_size, mtd->erase_size, mtd->oob_size. I need to set these values to the Denali hardware, but the Denali driver code is called at (1) which is called before the detection of the device size.
In Linux, nand_scan_ident() and nand_scan_tail() are called from each of NAND drivers, so we can use the values which have been set during nand_scan_ident().
In U-Boot, I think it is impossible.
If you use CONFIG_SYS_NAND_SELF_INIT you can insert code between nand_scan_ident() and nand_scan_tail(), just like in Linux.
-Scott