Re: [PATCH v2 2/5] dts: sun8i-h3: Add APB0 related clocks and resets

[Krzysztof Adamski]

On Wed, Feb 03, 2016 at 01:35:34PM +0100, Maxime Ripard wrote:
> Hi,
>
> On Tue, Feb 02, 2016 at 10:21:50PM +0100, Krzysztof Adamski wrote:
> > APB0 is bearly mentioned in H3 User Manual and it is only setup in the
> > Allwinners kernel dump for CIR. I have verified experimentally that the
> > gate for R_PIO exists and works, though. There are probably other gates
> > there but I don't know their order right now and I don't have access to
> > their peripherals on my board to test them.
> >
> > Signed-off-by: Krzysztof Adamski <k@xxxxxxxx>
> > ---
> >  arch/arm/boot/dts/sun8i-h3.dtsi | 32 ++++++++++++++++++++++++++++++++
> >  1 file changed, 32 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> > index 1524130e..ce35e93 100644
> > --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> > @@ -276,6 +276,32 @@
> >  			clocks = <&osc24M>, <&pll6 1>, <&pll5>;
> >  			clock-output-names = "mbus";
> >  		};
> > +
> > +		ahb0: ahb0_clk {
> > +			compatible = "fixed-factor-clock";
> > +			#clock-cells = <0>;
> > +			clock-div = <1>;
> > +			clock-mult = <1>;
> > +			clocks = <&osc24M>, <&osc32k>;
> > +			clock-output-names = "ahb0";
> > +		};
>
> I'm not sure what you mean there. The fixed factor clocks only take a
> single parent, and you provided two.

True, I that's actually some stupid leftover. As mentioned in the commit 
message I didn't really know how the clock tree looks like here so I 
wanted to just pretend it's connectet to osc24M. After some experiments 
I think that 0x01f0140c register does not exist on H3 and I was finally 
(hopefully) able to understand how this clock is set up in Allwinner's 
code. So I changed the clock to factors clock with possible osc32k and 
osc24M parrents. Will send it in v3.