[PATCHv3 2/3] drivers: mtd: devices: Add quad read support.

[Brian Norris]

On Thu, Oct 24, 2013 at 02:14:59PM +0530, Sourav Poddar wrote:
> On Thursday 24 October 2013 01:04 PM, Brian Norris wrote:
> >I just submitted my cleanups which (among other things) fixes this bug.
> >I believe I CC'd you. Go ahead and review it, and if it works to your
> >liking, please just base your work on top of it. I'll apply some or all
> >of that series if no one objects.
> >
> Ok.

I'll push parts the reviewed parts of my patch series now, so you can
base off them. (I'm still open to comments on them, though.)

> >Do all parts that support quad read also support all the other quad
> >opcodes (like quad program)?
> >
> I have Spansion and Macronix flash with me.
> 
> For spansion,
> supported quad commands are:
> QOR(0x6b) which is what I am using.
> QIOR(0xeb)
> DDR QIOR(0xed)
> 
> For macronix,
> QOR(0x6b) which is what I am using.
> QIOR(0xeb)

So it seems there are flash which support quad read but not quad
program. So the flag I recommended (M25P80_QUAD) should be made specific
to quad read (M25P80_QUAD_READ) I guess, since we may support page
program eventually.

Brian