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