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| author | Dmitry Khromov <dk@icelogic.net> | 2015-05-12 21:29:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 21:08:59 +0200 |
| commit | c3098356927254be270e5dc186a2ca144b64463b (patch) | |
| tree | 940a4cbc322141f72c57507bc9867cf1489466a9 /Documentation/ABI/stable/sysfs-bus-w1 | |
| parent | lz4: fix system halt at boot kernel on x86_64 (diff) | |
| download | linux-c3098356927254be270e5dc186a2ca144b64463b.tar.xz linux-c3098356927254be270e5dc186a2ca144b64463b.zip | |
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>
Diffstat (limited to 'Documentation/ABI/stable/sysfs-bus-w1')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-bus-w1 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-bus-w1 b/Documentation/ABI/stable/sysfs-bus-w1 new file mode 100644 index 000000000000..140d85b4ae92 --- /dev/null +++ b/Documentation/ABI/stable/sysfs-bus-w1 @@ -0,0 +1,11 @@ +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 |