Documentation/devicetree/bindings/input/input-reset.txt

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/input/input-reset.txt

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/input/input-reset.txt
Extension
.txt
Size
1060 bytes
Lines
34
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

Input: sysrq reset sequence

A simple binding to represent a set of keys as described in
include/uapi/linux/input.h. This is to communicate a sequence of keys to the
sysrq driver. Upon holding the keys for a specified amount of time (if
specified) the system is sync'ed and reset.

Key sequences are global to the system but all the keys in a set must be coming
from the same input device.

The /chosen node should contain a 'linux,sysrq-reset-seq' child node to define
a set of keys.

Required property:
keyset: array of Linux keycodes, one keycode per cell.

Optional property:
timeout-ms: duration keys must be pressed together in milliseconds before
generating a sysrq. If omitted the system is rebooted immediately when a valid
sequence has been recognized.

Example:

 chosen {
                linux,sysrq-reset-seq {
                        keyset = <0x03
                                  0x04
                                  0x0a>;
                        timeout-ms = <3000>;
                };
         };

Would represent KEY_2, KEY_3 and KEY_9.

Annotation

Implementation Notes