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authorDmitry Khromov <dk@icelogic.net>2015-05-12 22:29:44 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-05-24 22:08:59 +0300
commitc3098356927254be270e5dc186a2ca144b64463b (patch)
tree940a4cbc322141f72c57507bc9867cf1489466a9 /Documentation/ABI/stable
parent99b7e93c95c78952724a9783de6c78def8fbfc3f (diff)
downloadlinux-c3098356927254be270e5dc186a2ca144b64463b.tar.xz
w1: introduce an ability to specify microseconds bus scanning intervals
Some of 1-Wire devices commonly associated with physical access control systems are attached/generate presence for as short as 100 ms - hence the tens-to-hundreds milliseconds scan intervals are required. Signed-off-by: Dmitry Khromov <dk@icelogic.net> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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+What: /sys/bus/w1/devices/.../w1_master_timeout_us
+Date: April 2015
+Contact: Dmitry Khromov <dk@icelogic.net>
+Description: Bus scanning interval, microseconds component.
+ Some of 1-Wire devices commonly associated with physical access
+ control systems are attached/generate presence for as short as
+ 100 ms - hence the tens-to-hundreds milliseconds scan intervals
+ are required.
+ see Documentation/w1/w1.generic for detailed information.
+Users: any user space application which wants to know bus scanning
+ interval