| Message ID | 20160812001107.17016-1-stefan@agner.ch (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Aug 11, 2016 at 05:11:06PM -0700, Stefan Agner wrote: > Only i.MX 7Dual SoC supports CPU frequencies of up to 1GHz. The i.MX > 7Solo can run with up to 800MHz and does so without making use of DVFS > usually. While the device tree clearly specified a too fast operating > point for i.MX 7Solo, the kernel did not used it in practise so far > because the CPUfreq driver does not get loaded on i.MX 7Solo devices > (since the fsl,imx7s compatible string is not in the list of devices > making use of the cpufreq-dt driver...). > > Signed-off-by: Stefan Agner <stefan@agner.ch> > --- > Hi Shawn, > > This is based on my earlier patchset: > ARM: dts: imx7d: move ARM platform peripherals inside soc > > This are kind of fixes too, so if possible I would like to see them > in v4.8, what do you think? Patch "ARM: dts: imx7d: move ARM platform peripherals inside soc node" is not really a fix, and the diffstat looks too dramatic to be a -rc material, so I queued it as a -next patch, and any patch based on it will have to go through -next as well. Applied for -next, thanks. Shawn > > -- > Stefan > > arch/arm/boot/dts/imx7d.dtsi | 8 ++++++++ > arch/arm/boot/dts/imx7s.dtsi | 5 ----- > 2 files changed, 8 insertions(+), 5 deletions(-) > > diff --git a/arch/arm/boot/dts/imx7d.dtsi b/arch/arm/boot/dts/imx7d.dtsi > index 3d77d95..d0b199c 100644 > --- a/arch/arm/boot/dts/imx7d.dtsi > +++ b/arch/arm/boot/dts/imx7d.dtsi > @@ -45,6 +45,14 @@ > > / { > cpus { > + cpu0: cpu@0 { > + operating-points = < > + /* KHz uV */ > + 996000 1075000 > + 792000 975000 > + >; > + }; > + > cpu1: cpu@1 { > compatible = "arm,cortex-a7"; > device_type = "cpu"; > diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi > index c63591c..5132e2f 100644 > --- a/arch/arm/boot/dts/imx7s.dtsi > +++ b/arch/arm/boot/dts/imx7s.dtsi > @@ -85,11 +85,6 @@ > compatible = "arm,cortex-a7"; > device_type = "cpu"; > reg = <0>; > - operating-points = < > - /* KHz uV */ > - 996000 1075000 > - 792000 975000 > - >; > clock-latency = <61036>; /* two CLK32 periods */ > clocks = <&clks IMX7D_CLK_ARM>; > }; > -- > 2.9.0 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
diff --git a/arch/arm/boot/dts/imx7d.dtsi b/arch/arm/boot/dts/imx7d.dtsi index 3d77d95..d0b199c 100644 --- a/arch/arm/boot/dts/imx7d.dtsi +++ b/arch/arm/boot/dts/imx7d.dtsi @@ -45,6 +45,14 @@ / { cpus { + cpu0: cpu@0 { + operating-points = < + /* KHz uV */ + 996000 1075000 + 792000 975000 + >; + }; + cpu1: cpu@1 { compatible = "arm,cortex-a7"; device_type = "cpu"; diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi index c63591c..5132e2f 100644 --- a/arch/arm/boot/dts/imx7s.dtsi +++ b/arch/arm/boot/dts/imx7s.dtsi @@ -85,11 +85,6 @@ compatible = "arm,cortex-a7"; device_type = "cpu"; reg = <0>; - operating-points = < - /* KHz uV */ - 996000 1075000 - 792000 975000 - >; clock-latency = <61036>; /* two CLK32 periods */ clocks = <&clks IMX7D_CLK_ARM>; };
Only i.MX 7Dual SoC supports CPU frequencies of up to 1GHz. The i.MX 7Solo can run with up to 800MHz and does so without making use of DVFS usually. While the device tree clearly specified a too fast operating point for i.MX 7Solo, the kernel did not used it in practise so far because the CPUfreq driver does not get loaded on i.MX 7Solo devices (since the fsl,imx7s compatible string is not in the list of devices making use of the cpufreq-dt driver...). Signed-off-by: Stefan Agner <stefan@agner.ch> --- Hi Shawn, This is based on my earlier patchset: ARM: dts: imx7d: move ARM platform peripherals inside soc This are kind of fixes too, so if possible I would like to see them in v4.8, what do you think? -- Stefan arch/arm/boot/dts/imx7d.dtsi | 8 ++++++++ arch/arm/boot/dts/imx7s.dtsi | 5 ----- 2 files changed, 8 insertions(+), 5 deletions(-)