Setup a thermal zone driven by SoC temperature sensor. Create passive trip
points and bind them to CPUFreq cooling device that supports power
extension.
Based on work by Dien Pham <dien.pham...@renesas.com> for r8a7796 SoC.
Signed-off-by: Biju Das <biju....@bp.renesas.com>
---
arch/arm64/boot/dts/renesas/r8a774a1.dtsi | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/renesas/r8a774a1.dtsi
b/arch/arm64/boot/dts/renesas/r8a774a1.dtsi
index 603cfdb..6f52451 100644
--- a/arch/arm64/boot/dts/renesas/r8a774a1.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a774a1.dtsi
@@ -138,6 +138,7 @@
clocks = <&cpg CPG_CORE R8A774A1_CLK_Z>;
operating-points-v2 = <&cluster0_opp>;
capacity-dmips-mhz = <1024>;
+ #cooling-cells = <2>;
};
a57_1: cpu@1 {
@@ -150,6 +151,7 @@
clocks = <&cpg CPG_CORE R8A774A1_CLK_Z>;
operating-points-v2 = <&cluster0_opp>;
capacity-dmips-mhz = <1024>;
+ #cooling-cells = <2>;
};
a53_0: cpu@100 {
@@ -159,6 +161,7 @@
power-domains = <&sysc R8A774A1_PD_CA53_CPU0>;
next-level-cache = <&L2_CA53>;
enable-method = "psci";
+ #cooling-cells = <2>;
clocks = <&cpg CPG_CORE R8A774A1_CLK_Z2>;
operating-points-v2 = <&cluster1_opp>;
capacity-dmips-mhz = <560>;
@@ -2248,6 +2251,7 @@
polling-delay-passive = <250>;
polling-delay = <1000>;
thermal-sensors = <&tsc 0>;
+ sustainable-power = <3874>;
trips {
sensor1_crit: sensor1-crit {
@@ -2262,6 +2266,7 @@
polling-delay-passive = <250>;
polling-delay = <1000>;
thermal-sensors = <&tsc 1>;
+ sustainable-power = <3874>;
trips {
sensor2_crit: sensor2-crit {
@@ -2270,21 +2275,39 @@
type = "critical";
};
};
-
};
sensor_thermal3: sensor-thermal3 {
polling-delay-passive = <250>;
polling-delay = <1000>;
thermal-sensors = <&tsc 2>;
+ sustainable-power = <3874>;
trips {
+ target: trip-point1 {
+ temperature = <100000>;
+ hysteresis = <1000>;
+ type = "passive";
+ };
+
sensor3_crit: sensor3-crit {
temperature = <120000>;
hysteresis = <1000>;
type = "critical";
};
};
+ cooling-maps {
+ map0 {
+ trip = <&target>;
+ cooling-device = <&a57_0 0 2>;
+ contribution = <1024>;
+ };
+ map1 {
+ trip = <&target>;
+ cooling-device = <&a53_0 0 2>;
+ contribution = <1024>;
+ };
+ };
};
};
--
2.7.4
