Commit 9066073c authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Zhang Rui
Browse files

thermal: qcom: tsens: Add a skeletal TSENS drivers 



TSENS is Qualcomms' thermal temperature sensor device. It
supports reading temperatures from multiple thermal sensors
present on various QCOM SoCs.
Calibration data is generally read from a non-volatile memory
(eeprom) device.

Add a skeleton driver with all the necessary abstractions so
a variety of qcom device families which support TSENS can
add driver extensions.

Also add the required device tree bindings which can be used
to describe the TSENS device in DT.

Signed-off-by: default avatarRajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: default avatarLina Iyer <lina.iyer@linaro.org>
Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent c6935931

Documentation/devicetree/bindings/thermal/qcom-tsens.txt

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* QCOM SoC Temperature Sensor (TSENS)



Required properties:

- compatible :

 - "qcom,msm8916-tsens" : For 8916 Family of SoCs

 - "qcom,msm8974-tsens" : For 8974 Family of SoCs

 - "qcom,msm8996-tsens" : For 8996 Family of SoCs



- reg: Address range of the thermal registers

- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.

- Refer to Documentation/devicetree/bindings/nvmem/nvmem.txt to know how to specify

nvmem cells



Example:

tsens: thermal-sensor@900000 {

		compatible = "qcom,msm8916-tsens";

		reg = <0x4a8000 0x2000>;

		nvmem-cells = <&tsens_caldata>, <&tsens_calsel>;

		nvmem-cell-names = "caldata", "calsel";

		#thermal-sensor-cells = <1>;

	};

drivers/thermal/Kconfig

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@@ -399,4 +399,9 @@ config GENERIC_ADC_THERMAL 
	  to this driver. This driver reports the temperature by reading ADC

	  channel and converts it to temperature based on lookup table.



menu "Qualcomm thermal drivers"

depends on (ARCH_QCOM && OF) || COMPILE_TEST

source "drivers/thermal/qcom/Kconfig"

endmenu



endif

drivers/thermal/Makefile

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@@ -47,6 +47,7 @@ obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ 
obj-$(CONFIG_INT340X_THERMAL)  += int340x_thermal/

obj-$(CONFIG_INTEL_PCH_THERMAL)	+= intel_pch_thermal.o

obj-$(CONFIG_ST_THERMAL)	+= st/

obj-$(CONFIG_QCOM_TSENS)	+= qcom/

obj-$(CONFIG_TEGRA_SOCTHERM)	+= tegra/

obj-$(CONFIG_HISI_THERMAL)     += hisi_thermal.o

obj-$(CONFIG_MTK_THERMAL)	+= mtk_thermal.o

drivers/thermal/qcom/Kconfig

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config QCOM_TSENS

	tristate "Qualcomm TSENS Temperature Alarm"

	depends on THERMAL

	depends on QCOM_QFPROM

	depends on ARCH_QCOM || COMPILE_TEST

	help

	  This enables the thermal sysfs driver for the TSENS device. It shows

	  up in Sysfs as a thermal zone with multiple trip points. Disabling the

	  thermal zone device via the mode file results in disabling the sensor.

	  Also able to set threshold temperature for both hot and cold and update

	  when a threshold is reached.

drivers/thermal/qcom/Makefile

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obj-$(CONFIG_QCOM_TSENS)	+= qcom_tsens.o

qcom_tsens-y			+= tsens.o tsens-common.o

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