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-rw-r--r--kernel/Documentation/w1/w1.generic30
1 files changed, 19 insertions, 11 deletions
diff --git a/kernel/Documentation/w1/w1.generic b/kernel/Documentation/w1/w1.generic
index b2033c64c..b3ffaf8cf 100644
--- a/kernel/Documentation/w1/w1.generic
+++ b/kernel/Documentation/w1/w1.generic
@@ -76,21 +76,24 @@ See struct w1_bus_master definition in w1.h for details.
w1 master sysfs interface
------------------------------------------------------------------
-<xx-xxxxxxxxxxxxx> - a directory for a found device. The format is family-serial
+<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_add - (rw) manually register a slave device
+w1_master_attempts - (ro) the number of times a search was attempted
w1_master_max_slave_count
- - maximum number of slaves to search for at a time
-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)
+ - (rw) maximum number of slaves to search for at a time
+w1_master_name - (ro) the name of the device (w1_bus_masterX)
+w1_master_pullup - (rw) 5V strong pullup 0 enabled, 1 disabled
+w1_master_remove - (rw) manually remove a slave device
+w1_master_search - (rw) the number of searches left to do,
+ -1=continual (default)
w1_master_slave_count
- - the number of slaves found
-w1_master_slaves - the names of the slaves, one per line
-w1_master_timeout - the delay in seconds between searches
+ - (ro) the number of slaves found
+w1_master_slaves - (ro) the names of the slaves, one per line
+w1_master_timeout - (ro) the delay in seconds between searches
+w1_master_timeout_us
+ - (ro) the delay in microseconds beetwen searches
If you have a w1 bus that never changes (you don't add or remove devices),
you can set the module parameter search_count to a small positive number
@@ -101,6 +104,11 @@ 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.
+Bus searches occur at an interval, specified as a summ of timeout and
+timeout_us module parameters (either of which may be 0) for as long as
+w1_master_search remains greater than 0 or is -1. Each search attempt
+decrements w1_master_search by 1 (down to 0) and increments
+w1_master_attempts by 1.
w1 slave sysfs interface
------------------------------------------------------------------