Hy Sylvain,
I have a custom Lite5200B based board with two S29GL128 expansion flash in two banks (CS0/CSBOOT, CS1) in 8 bit mode. This is my flash configuration in my config/<board.h> file. AFAIK the U-Boot CFI driver detects the flash chip mode, so the configuration is quite simple.
#define CFG_MAX_FLASH_SECT 512 /* max num of sects on one chip */
#define CFG_FLASH_ERASE_TOUT 240000 /* Flash Erase Timeout (in ms) */ #define CFG_FLASH_WRITE_TOUT 500 /* Flash Write Timeout (in ms) */
#define CFG_FLASH_CFI_DRIVER #define CFG_FLASH_CFI #define CFG_FLASH_USE_BUFFER_WRITE
The chip select configuration register of both banks could be important.
#define CFG_BOOTCS_CFG 0x00021800 #define CFG_CS1_CFG 0x00021800
Best regards, Txema