[PATCH RFC 0/3] clk: CCF clock primitives + custom IO accessors

Sören Brinkmann soren.brinkmann at xilinx.com
Mon Mar 3 14:13:11 EST 2014


On Mon, 2014-03-03 at 08:07PM +0100, Gerhard Sittig wrote:
> On Mon, Mar 03, 2014 at 09:35 -0800, Sören Brinkmann wrote:
> > 
> > It would be nice if we could use the logic provided in the mux, div etc
> > primitives independently of how the HW is accessed and what is
> > necessary to shift and mask those register values around, right? I
> > mean, at then end we want to model a clk-(div|mux) and not a
> > clk-(div|mux) which has only a single, memory-mapped control register,
> > that does not overlap with other things, ...
> 
> Did you lookup the ll_ops discussion in the thread that
> originated from
> http://article.gmane.org/gmane.linux.ports.arm.kernel/289895 and
> did you see the outlined logic in
> http://article.gmane.org/gmane.linux.ports.arm.omap/109233 and
> http://article.gmane.org/gmane.linux.ports.arm.omap/109381 ?
> 
> Support for regmap access instead of mere MMIO was one of the
> things you could do with this approach.  You appear to be in the
> situation where you need such an extension (or something similar,
> but you really should look into the ll_ops thing).

Thanks for those pointer, I have some reading to do. That seems to
go into the right direction.  What is the status of those patches?
Are they already merged or actively worked on?

	Thanks,
	Sören





More information about the linux-arm-kernel mailing list