0001 Thermal driver for MAX77620 Power management IC from Maxim Semiconductor.
0002
0003 Maxim Semiconductor MAX77620 supports alarm interrupts when its
0004 die temperature crosses 120C and 140C. These threshold temperatures
0005 are not configurable. Device does not provide the real temperature
0006 of die other than just indicating whether temperature is above or
0007 below threshold level.
0008
0009 Required properties:
0010 -------------------
0011 #thermal-sensor-cells: For more details, please refer to
0012 <devicetree/bindings/thermal/thermal-sensor.yaml>
0013 The value must be 0.
0014
0015 For more details, please refer generic thermal DT binding document
0016 <devicetree/bindings/thermal/thermal*.yaml>.
0017
0018 Please refer <devicetree/bindings/mfd/max77620.txt> for mfd DT binding
0019 document for the MAX77620.
0020
0021 Example:
0022 --------
0023 #include <dt-bindings/mfd/max77620.h>
0024 #include <dt-bindings/thermal/thermal.h>
0025 ...
0026
0027 i2c@7000d000 {
0028 spmic: max77620@3c {
0029 compatible = "maxim,max77620";
0030 :::::
0031 #thermal-sensor-cells = <0>;
0032 :::
0033 };
0034 };
0035
0036 cool_dev: cool-dev {
0037 compatible = "cooling-dev";
0038 #cooling-cells = <2>;
0039 };
0040
0041 thermal-zones {
0042 PMIC-Die {
0043 polling-delay = <0>;
0044 polling-delay-passive = <0>;
0045 thermal-sensors = <&spmic>;
0046
0047 trips {
0048 pmic_die_warn_temp_thresh: hot-die {
0049 temperature = <120000>;
0050 type = "hot";
0051 hysteresis = <0>;
0052 };
0053
0054 pmic_die_cirt_temp_thresh: cirtical-die {
0055 temperature = <140000>;
0056 type = "critical";
0057 hysteresis = <0>;
0058 };
0059 };
0060
0061 cooling-maps {
0062 map0 {
0063 trip = <&pmic_die_warn_temp_thresh>;
0064 cooling-device = <&cool_dev THERMAL_NO_LIMIT
0065 THERMAL_NO_LIMIT>;
0066 contribution = <100>;
0067 };
0068 };
0069 };
0070 };
