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This add the necessary binding documentation for the thermal found on Rockchip SoCs Signed-off-by: zhaoyifeng <zyf@rock-chips.com> Signed-off-by: Caesar Wang <caesar.wang@rock-chips.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
69 lines
2.1 KiB
Plaintext
69 lines
2.1 KiB
Plaintext
* Temperature Sensor ADC (TSADC) on rockchip SoCs
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Required properties:
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- compatible : "rockchip,rk3288-tsadc"
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- reg : physical base address of the controller and length of memory mapped
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region.
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- interrupts : The interrupt number to the cpu. The interrupt specifier format
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depends on the interrupt controller.
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- clocks : Must contain an entry for each entry in clock-names.
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- clock-names : Shall be "tsadc" for the converter-clock, and "apb_pclk" for
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the peripheral clock.
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- resets : Must contain an entry for each entry in reset-names.
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See ../reset/reset.txt for details.
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- reset-names : Must include the name "tsadc-apb".
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- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
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- rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value.
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- rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO.
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- rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW
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1:HIGH.
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Exiample:
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tsadc: tsadc@ff280000 {
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compatible = "rockchip,rk3288-tsadc";
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reg = <0xff280000 0x100>;
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interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
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clock-names = "tsadc", "apb_pclk";
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resets = <&cru SRST_TSADC>;
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reset-names = "tsadc-apb";
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pinctrl-names = "default";
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pinctrl-0 = <&otp_out>;
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#thermal-sensor-cells = <1>;
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rockchip,hw-tshut-temp = <95000>;
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rockchip,hw-tshut-mode = <0>;
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rockchip,hw-tshut-polarity = <0>;
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};
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Example: referring to thermal sensors:
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thermal-zones {
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cpu_thermal: cpu_thermal {
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polling-delay-passive = <1000>; /* milliseconds */
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polling-delay = <5000>; /* milliseconds */
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/* sensor ID */
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thermal-sensors = <&tsadc 1>;
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trips {
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cpu_alert0: cpu_alert {
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temperature = <70000>; /* millicelsius */
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hysteresis = <2000>; /* millicelsius */
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type = "passive";
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};
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cpu_crit: cpu_crit {
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temperature = <90000>; /* millicelsius */
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hysteresis = <2000>; /* millicelsius */
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type = "critical";
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};
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};
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cooling-maps {
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map0 {
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trip = <&cpu_alert0>;
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cooling-device =
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<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
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};
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};
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};
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};
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