Re: [PATCH v3 5/8] rtc: ac100: Add clk output support

[Maxime Ripard]

On Wed, Jun 22, 2016 at 06:11:55PM +0800, Chen-Yu Tsai wrote:
> On Wed, Jun 22, 2016 at 6:02 PM, Maxime Ripard
> <maxime.ripard@xxxxxxxxxxxxxxxxxx> wrote:
> > Hi,
> >
> > On Mon, Jun 20, 2016 at 10:52:15AM +0800, Chen-Yu Tsai wrote:
> >> +     /*
> >> +      * The ADDA 4 MHz clock is from the codec side of the AC100,
> >> +      * which is likely a different power domain. However, boards
> >> +      * always have both sides powered on, so it is impossible to
> >> +      * test this.
> >> +      */
> >
> > If that ADDA clock is exposed by the codec, why are you putting it in
> > the RTC?
> 
> The thing is it's not entirely clear that it's from the codec side.
> I'm just inferring this from the name. (I'll make the comment clearer.)
> The codec parts of the datasheet don't mention this clock at all.
> 
> Allwinner's SDK puts all the clocks under the RTC module. And the
> are always on, so I can't really turn off the codec and see what
> happens. That and I don't have an oscilloscope or logic analyzer.

Why not just create a separate clock driver then?

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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