The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/src/arm/omap3-cpu-thermal.dtsi

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    1 // SPDX-License-Identifier: GPL-2.0-only
    2 /*
    3  * Device Tree Source for OMAP3 SoC CPU thermal
    4  *
    5  * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
    6  */
    7 
    8 #include <dt-bindings/thermal/thermal.h>
    9 
   10 cpu_thermal: cpu-thermal {
   11         polling-delay-passive = <250>; /* milliseconds */
   12         polling-delay = <1000>; /* milliseconds */
   13         coefficients = <0 20000>;
   14 
   15                         /* sensor       ID */
   16         thermal-sensors = <&bandgap     0>;
   17 
   18         cpu_trips: trips {
   19                 cpu_alert0: cpu_alert {
   20                         temperature = <80000>; /* millicelsius */
   21                         hysteresis = <2000>; /* millicelsius */
   22                         type = "passive";
   23                 };
   24                 cpu_crit: cpu_crit {
   25                         temperature = <90000>; /* millicelsius */
   26                         hysteresis = <2000>; /* millicelsius */
   27                         type = "critical";
   28                 };
   29         };
   30 
   31         cpu_cooling_maps: cooling-maps {
   32                 map0 {
   33                         trip = <&cpu_alert0>;
   34                         cooling-device =
   35                                 <&cpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
   36                 };
   37         };
   38 };

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