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ARM: dts: r8a7790: enable to use thermal-zone

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This patch enables to use thermal-zone on r8a7790.
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>
This commit is contained in:
Kuninori Morimoto 2016-01-28 02:45:34 +00:00 committed by Simon Horman
parent f3b063c8f4
commit a8b805f360
1 changed files with 24 additions and 2 deletions
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26
arch/arm/boot/dts/r8a7790.dtsi
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@ -112,6 +112,25 @@
};
};
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>;
@ -202,12 +221,15 @@
power-domains = <&cpg_clocks>;
};
thermal@e61f0000 {
compatible = "renesas,thermal-r8a7790", "renesas,rcar-thermal";
thermal: thermal@e61f0000 {
compatible = "renesas,thermal-r8a7790",
"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 R8A7790_CLK_THERMAL>;
power-domains = <&cpg_clocks>;
#thermal-sensor-cells = <0>;
};
timer {