1 Thermal driver for MAX77620 Power management IC from Maxim Semiconductor.
2
3 Maxim Semiconductor MAX77620 supports alarm interrupts when its
4 die temperature crosses 120C and 140C. These threshold temperatures
5 are not configurable. Device does not provide the real temperature
6 of die other than just indicating whether temperature is above or
7 below threshold level.
8
9 Required properties:
10 -------------------
11 #thermal-sensor-cells: For more details, please refer to
12 <devicetree/bindings/thermal/thermal-sensor.yaml>
13 The value must be 0.
14
15 For more details, please refer generic thermal DT binding document
16 <devicetree/bindings/thermal/thermal*.yaml>.
17
18 Please refer <devicetree/bindings/mfd/max77620.txt> for mfd DT binding
19 document for the MAX77620.
20
21 Example:
22 --------
23 #include <dt-bindings/mfd/max77620.h>
24 #include <dt-bindings/thermal/thermal.h>
25 ...
26
27 i2c@7000d000 {
28 spmic: max77620@3c {
29 compatible = "maxim,max77620";
30 :::::
31 #thermal-sensor-cells = <0>;
32 :::
33 };
34 };
35
36 cool_dev: cool-dev {
37 compatible = "cooling-dev";
38 #cooling-cells = <2>;
39 };
40
41 thermal-zones {
42 PMIC-Die {
43 polling-delay = <0>;
44 polling-delay-passive = <0>;
45 thermal-sensors = <&spmic>;
46
47 trips {
48 pmic_die_warn_temp_thresh: hot-die {
49 temperature = <120000>;
50 type = "hot";
51 hysteresis = <0>;
52 };
53
54 pmic_die_cirt_temp_thresh: cirtical-die {
55 temperature = <140000>;
56 type = "critical";
57 hysteresis = <0>;
58 };
59 };
60
61 cooling-maps {
62 map0 {
63 trip = <&pmic_die_warn_temp_thresh>;
64 cooling-device = <&cool_dev THERMAL_NO_LIMIT
65 THERMAL_NO_LIMIT>;
66 contribution = <100>;
67 };
68 };
69 };
70 };
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