[PATCH] memory: renesas-rpc-if: Fix IO state based on flash type

[Michael Walle]

>> For eg: here Adesto flash requires HI-Z for IO3 pin and Micron flash
>> requires setting "1" for IO3 pin for 4-bit mode to work.
> 
> That is odd. You'd need to ask Micron, but I assume it is because
> IO3 is shared with hold# and reset#. And there is a note "For pin
> configurations that share the DQ3 pin with RESET#, the RESET#
> functionality is disabled in QIO-SPI mode". So I guess the reason
> why they asking for a '1' is because they don't want to reset the
> flash. I'm pretty sure, we don't really support this in linux, so
> you'd probably want to disable that feature, i.e. see Table 7,
> bit 4. You could also come around this by enabling a pull-up on
> that line (assuming the SPI controller 'drives' HiZ during command
> phase).

Oh and I forgot. You probably can do some kind of fixup (where you
set this bit) for this flash in drivers/mtd/spi-nor/micron.c.

-michael