Spansion S256
Checking if the Quad Enable bit is set is possible from u-boot
> sspi 0 16 35
if result is 0002 then the nonvolatile Quad Enable bit is set
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Checking if the Quad Enable bit is set is possible from u-boot
> sspi 0 16 35
if result is 0002 then the nonvolatile Quad Enable bit is set