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- * Temperature Sensor ADC (TSADC) on rockchip SoCs
- Required properties:
- - compatible : should be "rockchip,<name>-tsadc"
- "rockchip,rk3288-tsadc": found on RK3288 SoCs
- "rockchip,rk3368-tsadc": found on RK3368 SoCs
- - reg : physical base address of the controller and length of memory mapped
- region.
- - interrupts : The interrupt number to the cpu. The interrupt specifier format
- depends on the interrupt controller.
- - clocks : Must contain an entry for each entry in clock-names.
- - clock-names : Shall be "tsadc" for the converter-clock, and "apb_pclk" for
- the peripheral clock.
- - resets : Must contain an entry for each entry in reset-names.
- See ../reset/reset.txt for details.
- - reset-names : Must include the name "tsadc-apb".
- - pinctrl-names : The pin control state names;
- - pinctrl-0 : The "init" pinctrl state, it will be set before device probe.
- - pinctrl-1 : The "default" pinctrl state, it will be set after reset the
- TSADC controller.
- - pinctrl-2 : The "sleep" pinctrl state, it will be in for suspend.
- - #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
- - rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value.
- - rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO.
- - rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW
- 1:HIGH.
- Exiample:
- tsadc: tsadc@ff280000 {
- compatible = "rockchip,rk3288-tsadc";
- reg = <0xff280000 0x100>;
- interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
- clock-names = "tsadc", "apb_pclk";
- resets = <&cru SRST_TSADC>;
- reset-names = "tsadc-apb";
- pinctrl-names = "init", "default", "sleep";
- pinctrl-0 = <&otp_gpio>;
- pinctrl-1 = <&otp_out>;
- pinctrl-2 = <&otp_gpio>;
- #thermal-sensor-cells = <1>;
- rockchip,hw-tshut-temp = <95000>;
- rockchip,hw-tshut-mode = <0>;
- rockchip,hw-tshut-polarity = <0>;
- };
- Example: referring to thermal sensors:
- thermal-zones {
- cpu_thermal: cpu_thermal {
- polling-delay-passive = <1000>; /* milliseconds */
- polling-delay = <5000>; /* milliseconds */
- /* sensor ID */
- thermal-sensors = <&tsadc 1>;
- trips {
- cpu_alert0: cpu_alert {
- temperature = <70000>; /* millicelsius */
- hysteresis = <2000>; /* millicelsius */
- type = "passive";
- };
- cpu_crit: cpu_crit {
- temperature = <90000>; /* millicelsius */
- hysteresis = <2000>; /* millicelsius */
- type = "critical";
- };
- };
- cooling-maps {
- map0 {
- trip = <&cpu_alert0>;
- cooling-device =
- <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
- };
- };
- };
- };
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