1 =============================== 1 ===============================
2 C-SKY Performance Monitor Units 2 C-SKY Performance Monitor Units
3 =============================== 3 ===============================
4 4
5 C-SKY Performance Monitor is designed for ck80 5 C-SKY Performance Monitor is designed for ck807/ck810/ck860 SMP soc and
6 it could count cpu's events for helping analys 6 it could count cpu's events for helping analysis performance issues.
7 7
8 ============================ 8 ============================
9 PMU node bindings definition 9 PMU node bindings definition
10 ============================ 10 ============================
11 11
12 Description: Describes PMU 12 Description: Describes PMU
13 13
14 PROPERTIES 14 PROPERTIES
15 15
16 - compatible 16 - compatible
17 Usage: required 17 Usage: required
18 Value type: <string> 18 Value type: <string>
19 Definition: must be "csky,csky 19 Definition: must be "csky,csky-pmu"
20 - interrupts 20 - interrupts
21 Usage: required 21 Usage: required
22 Value type: <u32 IRQ_TYPE_XXX> 22 Value type: <u32 IRQ_TYPE_XXX>
23 Definition: must be pmu irq nu 23 Definition: must be pmu irq num defined by soc
24 - count-width 24 - count-width
25 Usage: optional 25 Usage: optional
26 Value type: <u32> 26 Value type: <u32>
27 Definition: the width of pmu c 27 Definition: the width of pmu counter
28 28
29 Examples: 29 Examples:
30 --------- 30 ---------
31 #include <dt-bindings/interrupt-controller/irq 31 #include <dt-bindings/interrupt-controller/irq.h>
32 32
33 pmu: performace-monitor { 33 pmu: performace-monitor {
34 compatible = "csky,csky-pmu"; 34 compatible = "csky,csky-pmu";
35 interrupts = <23 IRQ_TYPE_EDGE 35 interrupts = <23 IRQ_TYPE_EDGE_RISING>;
36 interrupt-parent = <&intc>; 36 interrupt-parent = <&intc>;
37 count-width = <48>; 37 count-width = <48>;
38 }; 38 };
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