[v3] dt/bindings: qoriq-clock: Add binding for FMan clock mux

[Igal.Liberman at freescale.com]

Regards,
Igal Liberman.

> -----Original Message-----
> From: Wood Scott-B07421
> Sent: Wednesday, April 15, 2015 8:36 PM
> To: Liberman Igal-B31950
> Cc: devicetree at vger.kernel.org; linuxppc-dev at lists.ozlabs.org
> Subject: Re: [v3] dt/bindings: qoriq-clock: Add binding for FMan clock mux
> 
> On Tue, 2015-04-14 at 13:56 +0300, Igal.Liberman wrote:
> > From: Igal Liberman <Igal.Liberman at freescale.com>
> >
> > v3: Addressed feedback from Scott:
> > 	- Removed clock specifier description.
> >
> > v2: Addressed feedback from Scott:
> > 	- Moved the "fman-clk-mux" clock provider details
> > 	  under "clocks" property.
> >
> > Signed-off-by: Igal Liberman <Igal.Liberman at freescale.com>
> > ---
> >  .../devicetree/bindings/clock/qoriq-clock.txt      |   17 +++++++++++++++--
> >  1 file changed, 15 insertions(+), 2 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/clock/qoriq-clock.txt
> > b/Documentation/devicetree/bindings/clock/qoriq-clock.txt
> > index b0d7b73..2bb3b38 100644
> > --- a/Documentation/devicetree/bindings/clock/qoriq-clock.txt
> > +++ b/Documentation/devicetree/bindings/clock/qoriq-clock.txt
> > @@ -65,9 +65,10 @@ Required properties:
> >  		It takes parent's clock-frequency as its clock.
> >  	* "fsl,qoriq-platform-pll-1.0" for the platform PLL clock (v1.0)
> >  	* "fsl,qoriq-platform-pll-2.0" for the platform PLL clock (v2.0)
> > +	* "fsl,fman-clk-mux" for the Frame Manager clock.
> >  - #clock-cells: From common clock binding. The number of cells in a
> > -	clock-specifier. Should be <0> for "fsl,qoriq-sysclk-[1,2].0"
> > -	clocks, or <1> for "fsl,qoriq-core-pll-[1,2].0" clocks.
> > +	clock-specifier. Should be <0> for "fsl,qoriq-sysclk-[1,2].0" and
> > +	"fsl,fman-clk-mux" clocks or <1> for "fsl,qoriq-core-pll-[1,2].0".
> >  	For "fsl,qoriq-core-pll-1.0" clocks, the single
> >  	clock-specifier cell may take the following values:
> >  	* 0 - equal to the PLL frequency
> > @@ -145,6 +146,18 @@ Example for clock block and clock provider:
> >  			clocks = <&sysclk>;
> >  			clock-output-names = "platform-pll", "platform-pll-
> div2";
> >  		};
> > +
> > +		fm0clk: fm0-clk-mux {
> > +			#clock-cells = <0>;
> > +			reg = <0x10 4>
> > +			compatible = "fsl,fman-clk-mux";
> > +			clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, <&pll0 3>,
> > +				 <&platform_pll 0>, <&pll1 1>, <&pll1 2>;
> > +			clock-names = "pll0", "pll0-div2", "pll0-div3",
> > +				      "pll0-div4", "platform-pll", "pll1-div2",
> > +				      "pll1-div3";
> > +			clock-output-names = "fm0-clk";
> > +		};
> >  	};
> >  };
> >
> 
> I don't see this register in the manuals for older DPAA chips, such as
> p4080 or p3041.  Is it present but undocumented?  Should I be looking
> somewhere other than "Clocking Memory Map"?
> 

It's available only in part of the new chips (T4, T2, B4).
In T1024/T1040 there's only one option for FMan clock so this register is not available.

> -Scott
> 

Igal.