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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2016-01-28 02:46:22 +0000
committerSimon Horman <horms+renesas@verge.net.au>2016-02-19 14:52:18 +0900
commit57f9156bc620ac561ed46b2316de328e6b280023 (patch)
tree0e2c9b6d18fd0e8fed10dbd3ce9d621700b87284
parentcac68a56e34b9810e28dfd2e8645f278671d37ce (diff)
ARM: dts: r8a7793: enable to use thermal-zone
This patch enables to use thermal-zone on r8a7793. This thermal sensor can measure temperature from -40000 to 125000, but over 117000 can be critical on this chip. Thus, default critical temperature is now set as 115000 (this driver is using 5000 steps) (Current critical temperature is using it as 90000, but there is no big reason about it) And it doesn't check thermal zone periodically (same as current behavior). You can exchange it by modifying polling-delay[-passive] property. You can set trip temp if your kernel has CONFIG_THERMAL_WRITABLE_TRIPS, but you need to take care to use it, since it will call orderly_poweroff() it it reaches to the value. echo $temp > /sys/class/thermal/thermal_zone0/trip_point_0_temp Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
-rw-r--r--arch/arm/boot/dts/r8a7793.dtsi26
1 files changed, 24 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/r8a7793.dtsi b/arch/arm/boot/dts/r8a7793.dtsi
index 45dba1c79a43..9837f90f1718 100644
--- a/arch/arm/boot/dts/r8a7793.dtsi
+++ b/arch/arm/boot/dts/r8a7793.dtsi
@@ -54,6 +54,25 @@
};
};
+ thermal-zones {
+ cpu_thermal: cpu-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+
+ thermal-sensors = <&thermal>;
+
+ trips {
+ cpu-crit {
+ temperature = <115000>;
+ hysteresis = <0>;
+ type = "critical";
+ };
+ };
+ cooling-maps {
+ };
+ };
+ };
+
gic: interrupt-controller@f1001000 {
compatible = "arm,gic-400";
#interrupt-cells = <3>;
@@ -170,12 +189,15 @@
power-domains = <&cpg_clocks>;
};
- thermal@e61f0000 {
- compatible = "renesas,thermal-r8a7793", "renesas,rcar-thermal";
+ thermal: thermal@e61f0000 {
+ compatible = "renesas,thermal-r8a7793",
+ "renesas,rcar-gen2-thermal",
+ "renesas,rcar-thermal";
reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0100 0 0x38>;
interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&mstp5_clks R8A7793_CLK_THERMAL>;
power-domains = <&cpg_clocks>;
+ #thermal-sensor-cells = <0>;
};
timer {