summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/input/input-reset.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/input/input-reset.txt')
-rw-r--r--Documentation/devicetree/bindings/input/input-reset.txt33
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/input-reset.txt b/Documentation/devicetree/bindings/input/input-reset.txt
new file mode 100644
index 00000000000..2bb2626fdb7
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/input-reset.txt
@@ -0,0 +1,33 @@
+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:
+sysrq-reset-seq: 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.