linux-kernel - RE: [PATCH] ARM: dts: imx7d: use operating-points-v2 for cpu

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Message-ID: <AM3PR04MB1315E332CBFDA4151F6F3FA8F5950@AM3PR04MB1315.eurprd04.prod.outlook.com>
Date:   Mon, 21 May 2018 01:58:21 +0000
From:   Anson Huang <anson.huang@....com>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] ARM: dts: imx7d: use operating-points-v2 for cpu



Anson Huang
Best Regards!


> -----Original Message-----
> From: Shawn Guo [mailto:shawnguo@...nel.org]
> Sent: Sunday, May 20, 2018 8:51 PM
> To: Anson Huang <anson.huang@....com>
> Cc: kernel@...gutronix.de; Fabio Estevam <fabio.estevam@....com>;
> robh+dt@...nel.org; mark.rutland@....com; dl-linux-imx
> <linux-imx@....com>; linux-arm-kernel@...ts.infradead.org;
> devicetree@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] ARM: dts: imx7d: use operating-points-v2 for cpu
> 
> On Wed, May 16, 2018 at 12:48:17PM +0800, Anson Huang wrote:
> > This patch uses "operating-points-v2" instead of "operating-points" to
> > be more fit with cpufreq-dt driver.
> >
> > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > ---
> >  arch/arm/boot/dts/imx7d.dtsi | 24 +++++++++++++++++++-----
> >  1 file changed, 19 insertions(+), 5 deletions(-)
> >
> > diff --git a/arch/arm/boot/dts/imx7d.dtsi
> > b/arch/arm/boot/dts/imx7d.dtsi index 4c9877e..28980c8 100644
> > --- a/arch/arm/boot/dts/imx7d.dtsi
> > +++ b/arch/arm/boot/dts/imx7d.dtsi
> > @@ -9,12 +9,8 @@
> >  / {
> >  	cpus {
> >  		cpu0: cpu@0 {
> > -			operating-points = <
> > -				/* KHz	uV */
> > -				996000	1075000
> > -				792000	975000
> > -			>;
> >  			clock-frequency = <996000000>;
> > +			operating-points-v2 = <&cpu0_opp_table>;
> >  		};
> >
> >  		cpu1: cpu@1 {
> > @@ -22,6 +18,24 @@
> >  			device_type = "cpu";
> >  			reg = <1>;
> >  			clock-frequency = <996000000>;
> > +			operating-points-v2 = <&cpu0_opp_table>;
> > +		};
> > +	};
> > +
> > +	cpu0_opp_table: opp_table0 {
> 
> Hyphen is recommended in node name.  Also the suffix 0 doesn't mean too
> much here.  That said, a better node name would be 'opp-table'.
> 
> > +		compatible = "operating-points-v2";
> > +		opp-shared;
> > +
> > +		opp-792000000 {
> > +			opp-hz = /bits/ 64 <792000000>;
> > +			opp-microvolt = <975000>;
> > +			clock-latency-ns = <150000>;
> > +		};
> 
> We recommend to have a newline between nodes.
> 
> I fixed them all and applied the patch.
> 
> Shawn
 
Thanks Shawn.

Anson.



> 
> > +		opp-996000000 {
> > +			opp-hz = /bits/ 64 <996000000>;
> > +			opp-microvolt = <1075000>;
> > +			clock-latency-ns = <150000>;
> > +			opp-suspend;
> >  		};
> >  	};
> >
> > --
> > 2.7.4
> >