[PATCH v7 1/7] mtd: spi-nor: add Octal DTR support for Macronix flash

[Michael Walle]

> Create Macronix specify method for enable Octal DTR mode and
> set 20 dummy cycles to allow running at the maximum supported
> frequency for Macronix Octal flash.
> 
> Use number of dummy cycles which is parse by SFDP then convert
> it to bit pattern and set in CR2 register.
> Set CR2 register for enable octal DTR mode.
> 
> Use Read ID to confirm that enabling/diabling octal DTR mode
> was successful.
> 
> Macronix ID format is A-A-B-B-C-C in octal DTR mode.
> To ensure the successful enablement of octal DTR mode, confirm
> that the 6-byte data is entirely correct.
> 
> Signed-off-by: JaimeLiao <jaimeliao at mxic.com.tw>
> Co-developed-by: Tudor Ambarus <tudor.ambarus at linaro.org>

Acked-by: Michael Walle <mwalle at kernel.org>