Qualcomm's TSENS driver

The TSENS driver supports reading temperature from sensors across
the MSM. The driver defaults to support a 10 bit ADC.

The driver uses the Thermal sysfs framework to provide thermal
clients the ability to enable/disable the sensors, read trip zones,
read cool/warm temperature thresholds, set temperature thresholds
for cool/warm notification and receive notification on temperature
threshold events.

TSENS node

Required properties:
- compatible : should be "qcom,msm-tsens" for 8974, 9625, 8084, Samarium TSENS driver.
	       should be "qcom,msm8x10-tsens" for 8x10 TSENS driver.
	       should be "qcom,msm8x26-tsens" for 8x26 TSENS driver.
	       should be "qcom,fsm9900-tsens" for 9900 TSENS driver.
	       should be "qcom,mdm9630-tsens" for 9630 TSENS driver.
	       should be "qcom,msm8994-tsens" for 8994 TSENS driver.
	       should be "qcom,msm8996-tsens" for 8996 TSENS driver.
	       should be "qcom,msm8992-tsens" for 8992 TSENS driver.
	       should be "qcom,msm8916-tsens" for 8916 TSENS driver.
	       should be "qcom,msm8939-tsens" for 8939 TSENS driver.
	       should be "qcom,msm8909-tsens" for 8909 TSENS driver.
	       should be "qcom,msm8952-tsens" for 8952 TSENS driver.
	       should be "qcom,msmzirc-tsens" for zirc TSENS driver.
	       should be "qcom,mdm9607-tsens" for 9607 TSENS driver.
	       should be "qcom,msmtitanium-tsens" for titanium TSENS driver.
	       should be "qcom,msm8937-tsens" for 8937 TSENS driver.
	       should be "qcom,msmgold-tsens" for gold TSENS driver.
	       should be "qcom,msmcobalt-tsens" for cobalt TSENS driver.
	       The compatible property is used to identify the respective fusemap to use
	       for the corresponding SoC.
- reg : offset and length of the TSENS registers.
- reg : offset and length of the QFPROM registers used for storing
	the calibration data for the individual sensors.
- reg-names : resource names used for the physical address of the TSENS
	      registers, the QFPROM efuse primary calibration address region,
	      Should be "tsens_physical" for physical address of the TSENS,
	      "tsens_eeprom_physical" for physical address where primary
	      calibration data is stored. This includes the backup
	      calibration address region if TSENS calibration data is stored
	      in the region.
- interrupts : TSENS interrupt to notify Upper/Lower temperature threshold.
- interrupt-names: Should be "tsens-upper-lower" for temperature threshold.
		   Add "tsens-critical" for Critical temperature threshold notification
		   in addition to "tsens-upper-lower" for 8996 TSENS since
		   8996 supports Upper/Lower and Critical temperature threshold.
- qcom,sensors : Total number of available Temperature sensors for TSENS.
- qcom,slope : One point calibration characterized slope data for each
	       sensor used to compute the offset. Slope is represented
	       as ADC code/DegC and the value is multipled by a factor
	       of 1000.

Optional properties:
- qcom,calibration-less-mode : If present the pre-characterized data for offsets
		are used else it defaults to use calibration data from QFPROM.
- qcom,tsens-local-init : If the flag is present the TSENS control registers are
		initialized. If the boot configures the control register there is
		no need to re-initialize them. The control registers are also
		under a secure domain which can prevent them from being initialized
		locally.
- qcom,sensor-id : If the flag is present map the TSENS sensors based on the
		remote sensors that are enabled in HW. Ensure the mapping is not
		more than the number of supported sensors.
- qcom,client-id : If the flag is present use it to identify the SW ID mapping
		used to associate it with the controller and the physical sensor
		mapping within the controller. The physical sensor mapping within
		each controller is done using the qcom,sensor-id property. If the
		property is not present the SW ID mapping with default from 0 to
		total number of supported sensors with each controller instance.
- qcom,valid-status-check: If property is present, check the VALID bit is set
		before reporting the temperature data.
- qcom,temp1-offset: If property is present, Use these offset values
		to be added for 30 deg calib points.
- qcom,temp2-offset: If property is present, Use these offset values
		to be added for 120 deg calib points.

Example:

tsens@fc4a8000 {
	compatible = "qcom,msm-tsens";
	reg = <0xfc4a8000 0x2000>,
	      <0xfc4b8000 0x1000>;
	reg-names = "tsens_physical",
		    "tsens_eeprom_physical";
	interrupts = <0 184 0>;
	interrupt-names = "tsens-upper-lower";
	qcom,calibration-less-mode;
	qcom,sensors = <11>;
	qcom,slope = <3200 3200 3200 3200 3200 3200 3200 3200 3200
			3200>;
};