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* Temperature Monitor (TEMPMON) on Freescale i.MX SoCs

Required properties:
- compatible : "fsl,imx6q-tempmon" for i.MX6Q, "fsl,imx6sx-tempmon" for i.MX6SX.
  i.MX6SX has two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC,
  when temperature is below than low threshold, IRQ_LOW will be triggered, when temperature
  is higher than panic threshold, system will auto reboot by SRC module.
- fsl,tempmon : phandle pointer to system controller that contains TEMPMON
  control registers, e.g. ANATOP on imx6q.
- nvmem-cells: A phandle to the calibration cells provided by ocotp.
- nvmem-cell-names: Should be "calib", "temp_grade".

Deprecated properties:
- fsl,tempmon-data : phandle pointer to fuse controller that contains TEMPMON
  calibration data, e.g. OCOTP on imx6q.  The details about calibration data
  can be found in SoC Reference Manual.

Direct access to OCOTP via fsl,tempmon-data is incorrect on some newer chips
because it does not handle OCOTP clock requirements.

Optional properties:
- clocks : thermal sensor's clock source.

Example:
ocotp: ocotp@21bc000 {
	#address-cells = <1>;
	#size-cells = <1>;
	compatible = "fsl,imx6sx-ocotp", "syscon";
	reg = <0x021bc000 0x4000>;
	clocks = <&clks IMX6SX_CLK_OCOTP>;

	tempmon_calib: calib@38 {
		reg = <0x38 4>;
	};

	tempmon_temp_grade: temp-grade@20 {
		reg = <0x20 4>;
	};
};

tempmon: tempmon {
	compatible = "fsl,imx6sx-tempmon", "fsl,imx6q-tempmon";
	interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
	fsl,tempmon = <&anatop>;
	nvmem-cells = <&tempmon_calib>, <&tempmon_temp_grade>;
	nvmem-cell-names = "calib", "temp_grade";
	clocks = <&clks IMX6SX_CLK_PLL3_USB_OTG>;
};

Legacy method (Deprecated):
tempmon {
	compatible = "fsl,imx6q-tempmon";
	fsl,tempmon = <&anatop>;
	fsl,tempmon-data = <&ocotp>;
	clocks = <&clks 172>;
};