Commit f19f389f authored by Ryan Harkin's avatar Ryan Harkin Committed by Tom Rini

vexpress64: specify CONFIG_SYS_FLASH_CFI_WIDTH

Testing on the ARM Versatile Express Juno board showed intermittent CFI
flash detection problems.

Debug output in exception cases showed that the NOR flash was returning
incorrect values to a query command:

fwc addr 0000000008000000 cmd f0 f0f0f0f0 32bit x 8 bit
fwc addr 0000000008000000 cmd ff ffffffff 32bit x 8 bit
fwc addr 0000000008000154 cmd 98 98989898 32bit x 8 bit
is= cmd 51(Q) addr 0000000008000040 is= 00800051 51515151
fwc addr 0000000008001554 cmd 98 98989898 32bit x 8 bit
is= cmd 51(Q) addr 0000000008000040 is= 00800051 51515151
fwc addr 0000000008000000 cmd f0 00f000f0 32bit x 16 bit
fwc addr 0000000008000000 cmd ff 00ff00ff 32bit x 16 bit
fwc addr 0000000008000154 cmd 98 00980098 32bit x 16 bit
is= cmd 51(Q) addr 0000000008000040 is= 00800051 00510051
fwc addr 0000000008001554 cmd 98 00980098 32bit x 16 bit
is= cmd 51(Q) addr 0000000008000040 is= 00800051 00510051

Debugging showed that the problem could be solved by preventing u-boot
from scanning different flash widths by specifying
CONFIG_SYS_FLASH_CFI_WIDTH so that only using the 'correct' width was
used.
Signed-off-by: 's avatarRyan Harkin <ryan.harkin@linaro.org>
Reviewed-by: 's avatarLinus Walleij <linus.walleij@linaro.org>
parent 2efef404
......@@ -264,6 +264,7 @@
#define CONFIG_CMD_ARMFLASH
#define CONFIG_SYS_FLASH_CFI 1
#define CONFIG_FLASH_CFI_DRIVER 1
#define CONFIG_SYS_FLASH_CFI_WIDTH FLASH_CFI_32BIT
#define CONFIG_SYS_FLASH_BASE 0x08000000
#define CONFIG_SYS_FLASH_SIZE 0x04000000 /* 64 MiB */
#define CONFIG_SYS_MAX_FLASH_BANKS 2
......
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