>> This maybe your spi controller is still extended mode, Once EVCR bit 7 >> is set to 0, the spi nor device will operate in quad >> I/O.Command-address-data line is 4-x-4. >> So after send WRITE EVCR command , spi controller also must transfer >> to quad I/O Mode,and set its Command-address-data line also Should be 4-x-4 .
>Thanks, this helped. I added some code to snoop the command stream for WRITE >EVCR with quad mode, >and then set up the quad mode in the controller. Seems kinda ugly, but >working now. >-Graham Yes ,if enable spi nor Quad I/O, firstly, must check spi controller if support Quad I/O protocol, and after enable spi nor Quad I/O mode ,spi controller also must be transferred to Quad I/O protocol. Their two side must be matched together. Maybe spi controller can do this changes. Hi,Brian Can you give me some tips about this patch? Thanks! -Bean Huo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
