1 Synopsys ARC Local Timer with Interrupt Capabi 1 Synopsys ARC Local Timer with Interrupt Capabilities
2 - Found on all ARC CPUs (ARC700/ARCHS) 2 - Found on all ARC CPUs (ARC700/ARCHS)
3 - Can be optionally programmed to interrupt on 3 - Can be optionally programmed to interrupt on Limit
4 - Two identical copies TIMER0 and TIMER1 exist !! 4 - Two idential copies TIMER0 and TIMER1 exist in ARC cores and historically
5 TIMER0 used as clockevent provider (true for 5 TIMER0 used as clockevent provider (true for all ARC cores)
6 TIMER1 used for clocksource (mandatory for A 6 TIMER1 used for clocksource (mandatory for ARC700, optional for ARC HS)
7 7
8 Required properties: 8 Required properties:
9 9
10 - compatible : should be "snps,arc-timer" 10 - compatible : should be "snps,arc-timer"
11 - interrupts : single Interrupt going into par 11 - interrupts : single Interrupt going into parent intc
12 (16 for ARCHS cores, 3 for ARC7 12 (16 for ARCHS cores, 3 for ARC700 cores)
13 - clocks : phandle to the source clock 13 - clocks : phandle to the source clock
>> 14
>> 15 Optional properties:
>> 16
>> 17 - interrupt-parent : phandle to parent intc
14 18
15 Example: 19 Example:
16 20
17 timer0 { 21 timer0 {
18 compatible = "snps,arc-timer"; 22 compatible = "snps,arc-timer";
19 interrupts = <3>; 23 interrupts = <3>;
20 interrupt-parent = <&core_intc 24 interrupt-parent = <&core_intc>;
21 clocks = <&core_clk>; 25 clocks = <&core_clk>;
22 }; 26 };
23 27
24 timer1 { 28 timer1 {
25 compatible = "snps,arc-timer"; 29 compatible = "snps,arc-timer";
26 clocks = <&core_clk>; 30 clocks = <&core_clk>;
27 }; 31 };
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