projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c610afaa II |
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 |