Re: [PATCH] regmap: add iopoll-like polling macro

[Philipp Zabel <p.zabel@pengutronix.de>]

Hi Mark,

thank you for the comments.

Am Donnerstag, den 07.07.2016, 11:42 +0200 schrieb Mark Brown:
> On Wed, Jul 06, 2016 at 04:19:41PM +0200, Philipp Zabel wrote:
> 
> > This patch adds a macro regmap_read_poll_timeout that works similar
> > to the readx_poll_timeout defined in linux/iopoll.h, except that this
> > can also return the error value returned by a failed regmap_read.
> 
> Please make this a proper function.

I can't, the condition has to be evaluated inside the loop. This is
basically a poor man's function template.

> > +		if (sleep_us) \
> > +			usleep_range((sleep_us >> 2) + 1, sleep_us); \
> 
> Just write / 4 rather than a shift, the compiler should do the right
> thing and it's easier for readers.

Ok. Since this is copied from the readx_poll_timeout macro in
include/linux/iopoll.h, I should probably suggest the same change there.

regards
Philipp