Unsupported spi flash:
[ 1.950146] spi-mt7621 1e000b00.spi: sys_freq: 220000000
[ 1.957290] spi-nor spi0.0: unrecognized JEDEC id bytes: a1 40 18 a1 40 18
[ 1.964310] spi-nor: probe of spi0.0 failed with error -2
See this topic
Unsupported spi flash:
[ 1.950146] spi-mt7621 1e000b00.spi: sys_freq: 220000000
[ 1.957290] spi-nor spi0.0: unrecognized JEDEC id bytes: a1 40 18 a1 40 18
[ 1.964310] spi-nor: probe of spi0.0 failed with error -2
See this topic