tjh.dev
Linux kernel mirror (for testing)
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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- rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value.
26- rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO.
27- rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW
28 1:HIGH.
29
30Exiample:
31tsadc: tsadc@ff280000 {
32 compatible = "rockchip,rk3288-tsadc";
33 reg = <0xff280000 0x100>;
34 interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
35 clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
36 clock-names = "tsadc", "apb_pclk";
37 resets = <&cru SRST_TSADC>;
38 reset-names = "tsadc-apb";
39 pinctrl-names = "init", "default", "sleep";
40 pinctrl-0 = <&otp_gpio>;
41 pinctrl-1 = <&otp_out>;
42 pinctrl-2 = <&otp_gpio>;
43 #thermal-sensor-cells = <1>;
44 rockchip,hw-tshut-temp = <95000>;
45 rockchip,hw-tshut-mode = <0>;
46 rockchip,hw-tshut-polarity = <0>;
47};
48
49Example: referring to thermal sensors:
50thermal-zones {
51 cpu_thermal: cpu_thermal {
52 polling-delay-passive = <1000>; /* milliseconds */
53 polling-delay = <5000>; /* milliseconds */
54
55 /* sensor ID */
56 thermal-sensors = <&tsadc 1>;
57
58 trips {
59 cpu_alert0: cpu_alert {
60 temperature = <70000>; /* millicelsius */
61 hysteresis = <2000>; /* millicelsius */
62 type = "passive";
63 };
64 cpu_crit: cpu_crit {
65 temperature = <90000>; /* millicelsius */
66 hysteresis = <2000>; /* millicelsius */
67 type = "critical";
68 };
69 };
70
71 cooling-maps {
72 map0 {
73 trip = <&cpu_alert0>;
74 cooling-device =
75 <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
76 };
77 };
78 };
79};