Commit | Line | Data |
---|---|---|
4c076eb0 MP |
1 | Input: sysrq reset sequence |
2 | ||
3 | A simple binding to represent a set of keys as described in | |
4 | include/uapi/linux/input.h. This is to communicate a sequence of keys to the | |
5 | sysrq driver. Upon holding the keys for a specified amount of time (if | |
6 | specified) the system is sync'ed and reset. | |
7 | ||
8 | Key sequences are global to the system but all the keys in a set must be coming | |
9 | from the same input device. | |
10 | ||
11 | The /chosen node should contain a 'linux,sysrq-reset-seq' child node to define | |
12 | a set of keys. | |
13 | ||
14 | Required property: | |
15 | sysrq-reset-seq: array of Linux keycodes, one keycode per cell. | |
16 | ||
17 | Optional property: | |
18 | timeout-ms: duration keys must be pressed together in milliseconds before | |
19 | generating a sysrq. If omitted the system is rebooted immediately when a valid | |
20 | sequence has been recognized. | |
21 | ||
22 | Example: | |
23 | ||
24 | chosen { | |
25 | linux,sysrq-reset-seq { | |
26 | keyset = <0x03 | |
27 | 0x04 | |
28 | 0x0a>; | |
29 | timeout-ms = <3000>; | |
30 | }; | |
31 | }; | |
32 | ||
33 | Would represent KEY_2, KEY_3 and KEY_9. |