[PATCH 2/3] arm64: allwinner: a64: add CPU opp table
From: icenowy@aosc.io (Icenowy Zheng)
Date: 2017-09-23 00:16:13
Also in:
linux-clk, linux-devicetree, lkml
Subsystem:
arm/allwinner sunxi soc support, the rest · Maintainers:
Chen-Yu Tsai, Jernej Skrabec, Samuel Holland, Linus Torvalds
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>; + clock-names = "cpu"; + operating-points-v2 = <&cpu0_opp_table>; + #cooling-cells = <2>; }; cpu1: cpu at 1 {
@@ -68,6 +89,7 @@ device_type = "cpu"; reg = <1>; enable-method = "psci"; + operating-points-v2 = <&cpu0_opp_table>; }; cpu2: cpu at 2 {
@@ -75,6 +97,7 @@ device_type = "cpu"; reg = <2>; enable-method = "psci"; + operating-points-v2 = <&cpu0_opp_table>; }; cpu3: cpu at 3 {
@@ -82,6 +105,7 @@ device_type = "cpu"; reg = <3>; enable-method = "psci"; + operating-points-v2 = <&cpu0_opp_table>; }; };
--
2.13.5