Patch set 3:Code-Review +1

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1 comment:

• File spi25_statusreg.c:

  • Patch Set #3, Line 118: return spi_read_status_register_generic(flash, 0x35); /* Unclear if this is a std JEDEC opcode. */

    Looks like not, as other vendors use it to enter QPI:

    Macronix: https://www.macronix.com/Lists/ApplicationNote/Attachments/1899/AN0251V1%20-%20Macronix%20Serial%20Flash%20Multi%20IO%20Introduction.pdf
    ISSI: http://www.issi.com/WW/pdf/25WP064A.pdf

    Others use it differently:

    Cypress: https://docs.rs-online.com/e0e8/A700000006483477.pdf

    Others use it for some status register:

    SST: https://www.tme.eu/Document/84d3bb0d3f6d37c285de97bf579cab66/SST25VF020B.pdf
    Adesto: https://www.adestotech.com/wp-content/uploads/doc8715.pdf
    Zbit: https://datasheet.lcsc.com/szlcsc/2003141212_Zbit-ZB25VQ80ATIG_C495747.pdf

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