STM32 CPUFreq and OPP bindings
==============================

STM32 CPUFreq driver needs to read chip information from the SoC to list
available OPPs. Then it depends on cpufreq-dt bindings.

Required properties:
--------------------
- clocks: Phandle to the cpu clock "cpu".
- clocks-name: Should contain "cpu".
- nvmem-cells: Phandle to nvmem cell that contains "part_number".
- nvmem-cell-names: Must be "part_number".
- operating-points-v2: Phandle to operating points table. See ../power/opp.txt
  for more details.

Optional properties:
--------------------
See cpufreq-dt.txt for optional properties.

Examples:
---------
	cpus {
		#address-cells = <1>;
		#size-cells = <0>;

		cpu0: cpu@0 {
			compatible = "arm,cortex-a7";
			device_type = "cpu";
			reg = <0>;
			clocks = <&rcc CK_MPU>;
			clock-names = "cpu";
			operating-points-v2 = <&cpu0_opp_table>;
			nvmem-cells = <&part_number_otp>;
			nvmem-cell-names = "part_number";
		};

		cpu1: cpu@1 {
			compatible = "arm,cortex-a7";
			device_type = "cpu";
			reg = <1>;
			clocks = <&rcc CK_MPU>;
			clock-names = "cpu";
			operating-points-v2 = <&cpu0_opp_table>;
		};
	};

	cpu0_opp_table: cpu0-opp-table {
		compatible = "operating-points-v2";
		opp-shared;

		opp-650000000 {
			opp-hz = /bits/ 64 <650000000>;
			opp-microvolt = <1200000>;
			opp-supported-hw = <0x1>;
		};
		opp-800000000 {
			opp-hz = /bits/ 64 <800000000>;
			opp-microvolt = <1350000>;
			opp-supported-hw = <0x2>;
		};
	};