Messages in this thread | | | Subject | Re: [linux-sunxi] [PATCH 2/3] arm64: allwinner: a64: add CPU opp table | From | Samuel Holland <> | Date | Mon, 25 Sep 2017 12:38:47 -0500 |
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Hello,
On 09/22/17 19:15, Icenowy Zheng wrote: > Add the operating table for the CPU (ARM cores) on Allwinner A64 SoC. > > OPPs higher to 816MHz is temporarily dropped, to prevent overheat on > boards with AXP803 support and undervoltage on boards without AXP803 > support. > > Signed-off-by: Icenowy Zheng <icenowy@aosc.io> > --- > arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 24 ++++++++++++++++++++++++ > 1 file changed, 24 insertions(+) > > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi > index 20aba7b186aa..0532da4939eb 100644 > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi > @@ -52,6 +52,23 @@ > #address-cells = <1>; > #size-cells = <1>; > > + cpu0_opp_table: opp_table0 { > + compatible = "operating-points-v2"; > + opp-shared; > + > + opp-648000000 { > + opp-hz = /bits/ 64 <648000000>; > + opp-microvolt = <1040000>; > + clock-latency-ns = <244144>; /* 8 32k periods */ > + }; > + > + opp-816000000 { > + opp-hz = /bits/ 64 <816000000>; > + opp-microvolt = <1100000>; > + clock-latency-ns = <244144>; /* 8 32k periods */ > + }; > + }; > + > cpus { > #address-cells = <1>; > #size-cells = <0>; > @@ -61,6 +78,10 @@ > device_type = "cpu"; > reg = <0>; > enable-method = "psci"; > + clocks = <&ccu CLK_CPUX>; CLK_CPUX is not currently exposed in the dt-bindings header, so this doesn't compile.
> + clock-names = "cpu"; > + operating-points-v2 = <&cpu0_opp_table>; > + #cooling-cells = <2>; > }; > > cpu1: cpu@1 { > @@ -68,6 +89,7 @@ > device_type = "cpu"; > reg = <1>; > enable-method = "psci"; > + operating-points-v2 = <&cpu0_opp_table>; > }; > > cpu2: cpu@2 { > @@ -75,6 +97,7 @@ > device_type = "cpu"; > reg = <2>; > enable-method = "psci"; > + operating-points-v2 = <&cpu0_opp_table>; > }; > > cpu3: cpu@3 { > @@ -82,6 +105,7 @@ > device_type = "cpu"; > reg = <3>; > enable-method = "psci"; > + operating-points-v2 = <&cpu0_opp_table>; > }; > }; > >
Thanks, Samuel
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