When adding SPL support to a custom i.MX6ULL board with Toshiba TC58NVG0S3 NAND chip the MXS NAND SPL loader failed with "Failed to identify". This reason is that the SPL MXS NAND driver only supports ONFi-compliant NAND chips and the mentioned Toshiba NAND chip is non-ONFi.
This patch set makes `nand_get_flash_type()` from `nand_base.c` public, so it can be used by any SPL NAND driver, introduced a new config option `CONFIG_SPL_NAND_IDENT` to enable the lookup for supported NAND chips in the chip ID list. Finally, the MXS NAND SPL driver is refactored so that the original ONFi-only identification routine is enabled by default. For non-ONFi NAND chips the newly introduced config option can be used.
In my setup the binary size of `u-boot-spl.bin` is increased by about 13 kB when `CONFIG_SPL_NAND_IDENT` is enabled. As the i.MX6, as well as the i.MX28, both have an OCRAM of 128 kB the increase in the binary size is reasonable.
Jörg Krause (4): mtd: nand: export nand_get_flash_type function spl, nand: add option CONFIG_SPL_NAND_IDENT to lookup for supported NAND chips mtd: nand: mxs_nand_spl: refactor mxs_flash_ident mtd: nand: mxs_nand_spl: add mxs_flash_full_ident
README | 4 ++++ drivers/mtd/nand/Makefile | 1 + drivers/mtd/nand/mxs_nand_spl.c | 37 ++++++++++++++++++++++++++++++++++++- drivers/mtd/nand/nand_base.c | 3 ++- include/linux/mtd/rawnand.h | 10 +++++++--- scripts/config_whitelist.txt | 1 + 6 files changed, 51 insertions(+), 5 deletions(-)