Re: [RFC 5/5] arm64: dts: imx8mq: Add the opp table and the cpu-supply nodes

[Abel Vesa]

On 19-02-14 16:55:22, Angus Ainslie wrote:
> On 2019-02-13 11:05, Abel Vesa wrote:
> > Add the opp table containing only non over drive opps.
> > Also add the cpu-supply nodes for the A53 cores in the EVK board.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@xxxxxxx>
> > ---
> >  arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 17 +++++++++++++++++
> >  arch/arm64/boot/dts/freescale/imx8mq.dtsi    | 23
> > +++++++++++++++++++++++
> >  2 files changed, 40 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > index 54737bf..114359e 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > +++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > @@ -31,6 +31,23 @@
> >  		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
> >  		enable-active-high;
> >  	};
> > +
> > +};
> > +
> > +&A53_0 {
> > +	cpu-supply = <&sw1a_reg>;
> > +};
> > +
> > +&A53_1 {
> > +	cpu-supply = <&sw1a_reg>;
> > +};
> > +
> > +&A53_2 {
> > +	cpu-supply = <&sw1a_reg>;
> > +};
> > +
> > +&A53_3 {
> > +	cpu-supply = <&sw1a_reg>;
> >  };
> > 
> >  &fec1 {
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > index 1a89062..89b2d5f 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > @@ -91,6 +91,7 @@
> >  			clocks = <&clk IMX8MQ_CLK_ARM>;
> >  			enable-method = "psci";
> >  			next-level-cache = <&A53_L2>;
> > +			operating-points-v2 = <&a53_0_opp_table>;
> >  		};
> > 
> >  		A53_1: cpu@1 {
> > @@ -101,6 +102,7 @@
> >  			clocks = <&clk IMX8MQ_CLK_ARM>;
> >  			enable-method = "psci";
> >  			next-level-cache = <&A53_L2>;
> > +			operating-points-v2 = <&a53_0_opp_table>;
> >  		};
> > 
> >  		A53_2: cpu@2 {
> > @@ -111,6 +113,7 @@
> >  			clocks = <&clk IMX8MQ_CLK_ARM>;
> >  			enable-method = "psci";
> >  			next-level-cache = <&A53_L2>;
> > +			operating-points-v2 = <&a53_0_opp_table>;
> >  		};
> > 
> >  		A53_3: cpu@3 {
> > @@ -121,6 +124,7 @@
> >  			clocks = <&clk IMX8MQ_CLK_ARM>;
> >  			enable-method = "psci";
> >  			next-level-cache = <&A53_L2>;
> > +			operating-points-v2 = <&a53_0_opp_table>;
> >  		};
> > 
> >  		A53_L2: l2-cache0 {
> > @@ -666,6 +670,25 @@
> >  			status = "disabled";
> >  		};
> > 
> > +
> > +		a53_0_opp_table: opp-table {
> > +			compatible = "operating-points-v2";
> > +			opp-shared;
> > +
> > +			opp-800000000 {
> > +				opp-hz = /bits/ 64 <800000000>;
> > +				opp-microvolt = <900000>;
> > +				clock-latency-ns = <150000>;
> > +			};
> > +
> > +			opp-1000000000 {
> > +				opp-hz = /bits/ 64 <1000000000>;
> > +				opp-microvolt = <900000>;
> 
> Shouldn't this be
> 
> opp-microvolt = <1000000>;
> 

Hmm, I looked into some older datasheet which said the maximum non
overdrive is 1GHz.

But the latest one I could find:

https://www.nxp.com/docs/en/data-sheet/IMX8MDQLQIEC.pdf

says it's 0.8GHz. 

So I'll fix it in the next version.

Thanks.

> > +				clock-latency-ns = <150000>;
> > +				opp-suspend;
> > +			};
> > +		};
> > +
> >  		gic: interrupt-controller@38800000 {
> >  			compatible = "arm,gic-v3";
> >  			reg = <0x38800000 0x10000>,	/* GIC Dist */
>