From 4c076eb0cfd9fa3f8900ac3dbdcaaca2f5fc2c1e Mon Sep 17 00:00:00 2001 From: "Mathieu J. Poirier" Date: Sat, 3 Aug 2013 17:22:08 -0700 Subject: Input: sysrq - DT binding for key sequence Adding a simple device tree binding for the specification of key sequences. Definition of the keys found in the sequence are located in 'include/uapi/linux/input.h'. For the sysrq driver, holding the sequence of keys down for a specific amount of time will reset the system. Signed-off-by: Mathieu Poirier Acked-by: Grant Likely Signed-off-by: Dmitry Torokhov --- .../devicetree/bindings/input/input-reset.txt | 33 ++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/input-reset.txt (limited to 'Documentation/devicetree/bindings/input/input-reset.txt') diff --git a/Documentation/devicetree/bindings/input/input-reset.txt b/Documentation/devicetree/bindings/input/input-reset.txt new file mode 100644 index 0000000..2bb2626 --- /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. -- cgit v1.1