tjh.dev
Linux kernel mirror (for testing)
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linux
1* Temperature Sensor ADC (TSADC) on rockchip SoCs
2
3Required properties:
4- compatible : should be "rockchip,<name>-tsadc"
5 "rockchip,px30-tsadc": found on PX30 SoCs
6 "rockchip,rv1108-tsadc": found on RV1108 SoCs
7 "rockchip,rk3228-tsadc": found on RK3228 SoCs
8 "rockchip,rk3288-tsadc": found on RK3288 SoCs
9 "rockchip,rk3328-tsadc": found on RK3328 SoCs
10 "rockchip,rk3368-tsadc": found on RK3368 SoCs
11 "rockchip,rk3399-tsadc": found on RK3399 SoCs
12- reg : physical base address of the controller and length of memory mapped
13 region.
14- interrupts : The interrupt number to the cpu. The interrupt specifier format
15 depends on the interrupt controller.
16- clocks : Must contain an entry for each entry in clock-names.
17- clock-names : Shall be "tsadc" for the converter-clock, and "apb_pclk" for
18 the peripheral clock.
19- resets : Must contain an entry for each entry in reset-names.
20 See ../reset/reset.txt for details.
21- reset-names : Must include the name "tsadc-apb".
22- pinctrl-names : The pin control state names;
23- pinctrl-0 : The "init" pinctrl state, it will be set before device probe.
24- pinctrl-1 : The "default" pinctrl state, it will be set after reset the
25 TSADC controller.
26- pinctrl-2 : The "sleep" pinctrl state, it will be in for suspend.
27- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
28
29Optional properties:
30- rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value.
31- rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO.
32- rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW
33 1:HIGH.
34- rockchip,grf : The phandle of the syscon node for the general register file.
35
36Exiample:
37tsadc: tsadc@ff280000 {
38 compatible = "rockchip,rk3288-tsadc";
39 reg = <0xff280000 0x100>;
40 interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
41 clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
42 clock-names = "tsadc", "apb_pclk";
43 resets = <&cru SRST_TSADC>;
44 reset-names = "tsadc-apb";
45 pinctrl-names = "init", "default", "sleep";
46 pinctrl-0 = <&otp_gpio>;
47 pinctrl-1 = <&otp_out>;
48 pinctrl-2 = <&otp_gpio>;
49 #thermal-sensor-cells = <1>;
50 rockchip,hw-tshut-temp = <95000>;
51 rockchip,hw-tshut-mode = <0>;
52 rockchip,hw-tshut-polarity = <0>;
53};
54
55Example: referring to thermal sensors:
56thermal-zones {
57 cpu_thermal: cpu_thermal {
58 polling-delay-passive = <1000>; /* milliseconds */
59 polling-delay = <5000>; /* milliseconds */
60
61 /* sensor ID */
62 thermal-sensors = <&tsadc 1>;
63
64 trips {
65 cpu_alert0: cpu_alert {
66 temperature = <70000>; /* millicelsius */
67 hysteresis = <2000>; /* millicelsius */
68 type = "passive";
69 };
70 cpu_crit: cpu_crit {
71 temperature = <90000>; /* millicelsius */
72 hysteresis = <2000>; /* millicelsius */
73 type = "critical";
74 };
75 };
76
77 cooling-maps {
78 map0 {
79 trip = <&cpu_alert0>;
80 cooling-device =
81 <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
82 };
83 };
84 };
85};