1Binding for Thermal Sensor for STMicroelectronics STM32 series of SoCs. 2 3On STM32 SoCs, the Digital Temperature Sensor (DTS) is in charge of managing an 4analog block which delivers a frequency depending on the internal SoC's 5temperature. By using a reference frequency, DTS is able to provide a sample 6number which can be translated into a temperature by the user. 7 8DTS provides interrupt notification mechanism by threshold. This mechanism 9offers two temperature trip points: passive and critical. The first is intended 10for passive cooling notification while the second is used for over-temperature 11reset. 12 13Required parameters: 14------------------- 15 16compatible: Should be "st,stm32-thermal" 17reg: This should be the physical base address and length of the 18 sensor's registers. 19clocks: Phandle of the clock used by the thermal sensor. 20 See: Documentation/devicetree/bindings/clock/clock-bindings.txt 21clock-names: Should be "pclk" for register access clock and reference clock. 22 See: Documentation/devicetree/bindings/resource-names.txt 23#thermal-sensor-cells: Should be 0. See ./thermal.txt for a description. 24interrupts: Standard way to define interrupt number. 25 26Example: 27 28 thermal-zones { 29 cpu_thermal: cpu-thermal { 30 polling-delay-passive = <0>; 31 polling-delay = <0>; 32 33 thermal-sensors = <&thermal>; 34 35 trips { 36 cpu_alert1: cpu-alert1 { 37 temperature = <85000>; 38 hysteresis = <0>; 39 type = "passive"; 40 }; 41 42 cpu-crit: cpu-crit { 43 temperature = <120000>; 44 hysteresis = <0>; 45 type = "critical"; 46 }; 47 }; 48 49 cooling-maps { 50 }; 51 }; 52 }; 53 54 thermal: thermal@50028000 { 55 compatible = "st,stm32-thermal"; 56 reg = <0x50028000 0x100>; 57 clocks = <&rcc TMPSENS>; 58 clock-names = "pclk"; 59 #thermal-sensor-cells = <0>; 60 interrupts = <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>; 61 }; 62