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[linux-2.6.git] / Documentation / devicetree / bindings / arm / twd.txt
1 * ARM Timer Watchdog
2
3 ARM 11MP, Cortex-A5 and Cortex-A9 are often associated with a per-core
4 Timer-Watchdog (aka TWD), which provides both a per-cpu local timer
5 and watchdog.
6
7 The TWD is usually attached to a GIC to deliver its two per-processor
8 interrupts.
9
10 ** Timer node required properties:
11
12 - compatible : Should be one of:
13         "arm,cortex-a9-twd-timer"
14         "arm,cortex-a5-twd-timer"
15         "arm,arm11mp-twd-timer"
16
17 - interrupts : One interrupt to each core
18
19 - reg : Specify the base address and the size of the TWD timer
20         register window.
21
22 Example:
23
24         twd-timer@2c000600 {
25                 compatible = "arm,arm11mp-twd-timer"";
26                 reg = <0x2c000600 0x20>;
27                 interrupts = <1 13 0xf01>;
28         };
29
30 ** Watchdog node properties:
31
32 - compatible : Should be one of:
33         "arm,cortex-a9-twd-wdt"
34         "arm,cortex-a5-twd-wdt"
35         "arm,arm11mp-twd-wdt"
36
37 - interrupts : One interrupt to each core
38
39 - reg : Specify the base address and the size of the TWD watchdog
40         register window.
41
42 Example:
43
44         twd-watchdog@2c000620 {
45                 compatible = "arm,arm11mp-twd-wdt";
46                 reg = <0x2c000620 0x20>;
47                 interrupts = <1 14 0xf01>;
48         };