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| author | David Fries <david@fries.net> | 2008-10-15 22:04:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:50 -0700 |
| commit | eba3b06da4bd8b79fe6c8ed922a319362c1a40c0 (patch) | |
| tree | f6463a23555b02150839c840292b99838fb936a3 /Documentation/w1 | |
| parent | 9141f57c7edd40a48a41b7e31427c4b2831a36af (diff) | |
| download | lwn-eba3b06da4bd8b79fe6c8ed922a319362c1a40c0.tar.gz lwn-eba3b06da4bd8b79fe6c8ed922a319362c1a40c0.zip | |
W1: Document add, remove, search_count, and pullup.
Document w1_master_add, w1_master_remove, search_count, and pullup.
Signed-off-by: David Fries <david@fries.net>
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/w1')
| -rw-r--r-- | Documentation/w1/w1.generic | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/w1/w1.generic b/Documentation/w1/w1.generic index 4c6509dd4789..e3333eec4320 100644 --- a/Documentation/w1/w1.generic +++ b/Documentation/w1/w1.generic @@ -79,10 +79,13 @@ w1 master sysfs interface <xx-xxxxxxxxxxxxx> - a directory for a found device. The format is family-serial bus - (standard) symlink to the w1 bus driver - (standard) symlink to the w1 driver +w1_master_add - Manually register a slave device w1_master_attempts - the number of times a search was attempted w1_master_max_slave_count - the maximum slaves that may be attached to a master w1_master_name - the name of the device (w1_bus_masterX) +w1_master_pullup - 5V strong pullup 0 enabled, 1 disabled +w1_master_remove - Manually remove a slave device w1_master_search - the number of searches left to do, -1=continual (default) w1_master_slave_count - the number of slaves found @@ -90,7 +93,13 @@ w1_master_slaves - the names of the slaves, one per line w1_master_timeout - the delay in seconds between searches If you have a w1 bus that never changes (you don't add or remove devices), -you can set w1_master_search to a positive value to disable searches. +you can set the module parameter search_count to a small positive number +for an initially small number of bus searches. Alternatively it could be +set to zero, then manually add the slave device serial numbers by +w1_master_add device file. The w1_master_add and w1_master_remove files +generally only make sense when searching is disabled, as a search will +redetect manually removed devices that are present and timeout manually +added devices that aren't on the bus. w1 slave sysfs interface |