xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/cpufreq/imx-cpufreq-dt.txt

i.MX CPUFreq-DT OPP bindings
================================

Certain i.MX SoCs support different OPPs depending on the "market segment" and
"speed grading" value which are written in fuses. These bits are combined with
the opp-supported-hw values for each OPP to check if the OPP is allowed.

Required properties:
--------------------

For each opp entry in 'operating-points-v2' table:
- opp-supported-hw: Two bitmaps indicating:
  - Supported speed grade mask
  - Supported market segment mask
    0: Consumer
    1: Extended Consumer
    2: Industrial
    3: Automotive

Example:
--------

opp_table {
	compatible = "operating-points-v2";
	opp-1000000000 {
		opp-hz = /bits/ 64 <1000000000>;
		/* grade >= 0, consumer only */
		opp-supported-hw = <0xf>, <0x3>;
	};

	opp-1300000000 {
		opp-hz = /bits/ 64 <1300000000>;
		opp-microvolt = <1000000>;
		/* grade >= 1, all segments */
		opp-supported-hw = <0xe>, <0x7>;
	};
}