On Fri, May 08, 2015 at 06:07:52PM +0100, Ryan Harkin wrote: > 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: Ryan Harkin <ryan.har...@linaro.org> > Reviewed-by: Linus Walleij <linus.wall...@linaro.org>
Applied to u-boot/master, thanks! -- Tom
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