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