GNU Linux-libre 4.14.266-gnu1
[releases.git] / Documentation / devicetree / bindings / thermal / qcom-spmi-temp-alarm.txt
1 Qualcomm QPNP PMIC Temperature Alarm
2
3 QPNP temperature alarm peripherals are found inside of Qualcomm PMIC chips
4 that utilize the Qualcomm SPMI implementation. These peripherals provide an
5 interrupt signal and status register to identify high PMIC die temperature.
6
7 Required properties:
8 - compatible:      Should contain "qcom,spmi-temp-alarm".
9 - reg:             Specifies the SPMI address and length of the controller's
10                    registers.
11 - interrupts:      PMIC temperature alarm interrupt.
12 - #thermal-sensor-cells: Should be 0. See thermal.txt for a description.
13
14 Optional properties:
15 - io-channels:     Should contain IIO channel specifier for the ADC channel,
16                    which report chip die temperature.
17 - io-channel-names: Should contain "thermal".
18
19 Example:
20
21         pm8941_temp: thermal-alarm@2400 {
22                 compatible = "qcom,spmi-temp-alarm";
23                 reg = <0x2400 0x100>;
24                 interrupts = <0 0x24 0 IRQ_TYPE_EDGE_RISING>;
25                 #thermal-sensor-cells = <0>;
26
27                 io-channels = <&pm8941_vadc VADC_DIE_TEMP>;
28                 io-channel-names = "thermal";
29         };
30
31         thermal-zones {
32                 pm8941 {
33                         polling-delay-passive = <250>;
34                         polling-delay = <1000>;
35
36                         thermal-sensors = <&pm8941_temp>;
37
38                         trips {
39                                 passive {
40                                         temperature = <1050000>;
41                                         hysteresis = <2000>;
42                                         type = "passive";
43                                 };
44                                 alert {
45                                         temperature = <125000>;
46                                         hysteresis = <2000>;
47                                         type = "hot";
48                                 };
49                                 crit {
50                                         temperature = <145000>;
51                                         hysteresis = <2000>;
52                                         type = "critical";
53                                 };
54                         };
55                 };
56         };
57