Documentation/devicetree/bindings/cpufreq/imx-cpufreq-dt.txt

   1 i.MX CPUFreq-DT OPP bindings
   2 ================================
   3
   4 Certain i.MX SoCs support different OPPs depending on the "market segment" and
   5 "speed grading" value which are written in fuses. These bits are combined with
   6 the opp-supported-hw values for each OPP to check if the OPP is allowed.
   7
   8 Required properties:
   9 --------------------
  10
  11 For each opp entry in 'operating-points-v2' table:
  12 - opp-supported-hw: Two bitmaps indicating:
  13   - Supported speed grade mask
  14   - Supported market segment mask
  15     0: Consumer
  16     1: Extended Consumer
  17     2: Industrial
  18     3: Automotive
  19
  20 Example:
  21 --------
  22
  23 opp_table {
  24         compatible = "operating-points-v2";
  25         opp-1000000000 {
  26                 opp-hz = /bits/ 64 <1000000000>;
  27                 /* grade >= 0, consumer only */
  28                 opp-supported-hw = <0xf>, <0x3>;
  29         };
  30
  31         opp-1300000000 {
  32                 opp-hz = /bits/ 64 <1300000000>;
  33                 opp-microvolt = <1000000>;
  34                 /* grade >= 1, all segments */
  35                 opp-supported-hw = <0xe>, <0x7>;
  36         };
  37 }