Re: [PATCH] regmap: flat: introduce register striding to savesomememories

[Xiubo Li]

On 31/12/2015 01:58, Mark Brown wrote:
> On Fri, Dec 18, 2015 at 04:59:38PM +0800, lixiubo@xxxxxxxxxxxxxxxxxxxx wrote:
>
> > > I think we'll need to continue supporting non power of two strides so
> > > an unconditional conversion to shifts might be an issue - some weird DSP
> > > probably does that.
>
> > Yes, agreed.
>
> > IMO this won't happen to MMIO, and for the device using MMIO the
> > register strides should equal to power of two.
>
> > Are there some cases I have met?
>
> DSPs exposed via I2C and SPI are the main things I'm worried about.
> It's fairly common for DSPs to have unusual word sizes including things
> like three bytes.

Yes, if so, for this case the non power of two strides should be still 
supported.

Thanks for your promotion, and I will think over of this carefully.

BRs

Xiubo Li




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