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1* Temperature Sensor ADC (TSADC) on rockchip SoCs
2
3Required properties:
4- compatible : should be "rockchip,<name>-tsadc"
5 "rockchip,rk3228-tsadc": found on RK3228 SoCs
6 "rockchip,rk3288-tsadc": found on RK3288 SoCs
7 "rockchip,rk3368-tsadc": found on RK3368 SoCs
8 "rockchip,rk3399-tsadc": found on RK3399 SoCs
9- reg : physical base address of the controller and length of memory mapped
10 region.
11- interrupts : The interrupt number to the cpu. The interrupt specifier format
12 depends on the interrupt controller.
13- clocks : Must contain an entry for each entry in clock-names.
14- clock-names : Shall be "tsadc" for the converter-clock, and "apb_pclk" for
15 the peripheral clock.
16- resets : Must contain an entry for each entry in reset-names.
17 See ../reset/reset.txt for details.
18- reset-names : Must include the name "tsadc-apb".
19- pinctrl-names : The pin control state names;
20- pinctrl-0 : The "init" pinctrl state, it will be set before device probe.
21- pinctrl-1 : The "default" pinctrl state, it will be set after reset the
22 TSADC controller.
23- pinctrl-2 : The "sleep" pinctrl state, it will be in for suspend.
24- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
25
26Optional properties:
27- rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value.
28- rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO.
29- rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW
30 1:HIGH.
31- rockchip,grf : The phandle of the syscon node for the general register file.
32
33Exiample:
34tsadc: tsadc@ff280000 {
35 compatible = "rockchip,rk3288-tsadc";
36 reg = <0xff280000 0x100>;
37 interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
38 clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
39 clock-names = "tsadc", "apb_pclk";
40 resets = <&cru SRST_TSADC>;
41 reset-names = "tsadc-apb";
42 pinctrl-names = "init", "default", "sleep";
43 pinctrl-0 = <&otp_gpio>;
44 pinctrl-1 = <&otp_out>;
45 pinctrl-2 = <&otp_gpio>;
46 #thermal-sensor-cells = <1>;
47 rockchip,hw-tshut-temp = <95000>;
48 rockchip,hw-tshut-mode = <0>;
49 rockchip,hw-tshut-polarity = <0>;
50};
51
52Example: referring to thermal sensors:
53thermal-zones {
54 cpu_thermal: cpu_thermal {
55 polling-delay-passive = <1000>; /* milliseconds */
56 polling-delay = <5000>; /* milliseconds */
57
58 /* sensor ID */
59 thermal-sensors = <&tsadc 1>;
60
61 trips {
62 cpu_alert0: cpu_alert {
63 temperature = <70000>; /* millicelsius */
64 hysteresis = <2000>; /* millicelsius */
65 type = "passive";
66 };
67 cpu_crit: cpu_crit {
68 temperature = <90000>; /* millicelsius */
69 hysteresis = <2000>; /* millicelsius */
70 type = "critical";
71 };
72 };
73
74 cooling-maps {
75 map0 {
76 trip = <&cpu_alert0>;
77 cooling-device =
78 <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
79 };
80 };
81 };
82};