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author | Kunihiko Hayashi <hayashi.kunihiko@socionext.com> | 2017-08-01 17:04:50 +0900 |
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committer | Zhang Rui <rui.zhang@intel.com> | 2017-08-11 10:49:25 +0800 |
commit | 0fad424465021aeeb11a816f3a749167f8c776eb (patch) | |
tree | 2ac77013957b8c1fedb6926a7212da6f0b657e5f /Documentation/devicetree/bindings/thermal | |
parent | 16f73eb02d7e1765ccab3d2018e0bd98eb93d973 (diff) | |
download | linux-0fad424465021aeeb11a816f3a749167f8c776eb.tar.gz linux-0fad424465021aeeb11a816f3a749167f8c776eb.tar.bz2 linux-0fad424465021aeeb11a816f3a749167f8c776eb.zip |
dt-bindings: thermal: add binding documentation for UniPhier thermal monitor
Add devicetree binding documentation for thermal monitor implemented on
Socionext UniPhier SoCs.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'Documentation/devicetree/bindings/thermal')
-rw-r--r-- | Documentation/devicetree/bindings/thermal/uniphier-thermal.txt | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/thermal/uniphier-thermal.txt b/Documentation/devicetree/bindings/thermal/uniphier-thermal.txt new file mode 100644 index 000000000000..686c0b42ed3f --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/uniphier-thermal.txt @@ -0,0 +1,64 @@ +* UniPhier Thermal bindings + +This describes the devicetree bindings for thermal monitor supported by +PVT(Process, Voltage and Temperature) monitoring unit implemented on Socionext +UniPhier SoCs. + +Required properties: +- compatible : + - "socionext,uniphier-pxs2-thermal" : For UniPhier PXs2 SoC + - "socionext,uniphier-ld20-thermal" : For UniPhier LD20 SoC +- interrupts : IRQ for the temperature alarm +- #thermal-sensor-cells : Should be 0. See ./thermal.txt for details. + +Optional properties: +- socionext,tmod-calibration: A pair of calibrated values referred from PVT, + in case that the values aren't set on SoC, + like a reference board. + +Example: + + sysctrl@61840000 { + compatible = "socionext,uniphier-ld20-sysctrl", + "simple-mfd", "syscon"; + reg = <0x61840000 0x10000>; + ... + pvtctl: pvtctl { + compatible = "socionext,uniphier-ld20-thermal"; + interrupts = <0 3 1>; + #thermal-sensor-cells = <0>; + }; + ... + }; + + thermal-zones { + cpu_thermal { + polling-delay-passive = <250>; /* 250ms */ + polling-delay = <1000>; /* 1000ms */ + thermal-sensors = <&pvtctl>; + + trips { + cpu_crit: cpu_crit { + temperature = <110000>; /* 110C */ + hysteresis = <2000>; + type = "critical"; + }; + cpu_alert: cpu_alert { + temperature = <100000>; /* 100C */ + hysteresis = <2000>; + type = "passive"; + }; + }; + + cooling-maps { + map0 { + trip = <&cpu_alert>; + cooling-device = <&cpu0 (-1) (-1)>; + }; + map1 { + trip = <&cpu_alert>; + cooling-device = <&cpu2 (-1) (-1)>; + }; + }; + }; + }; |