path: root/Documentation/rapidio/sysfs.txt
diff options
Diffstat (limited to 'Documentation/rapidio/sysfs.txt')
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/rapidio/sysfs.txt b/Documentation/rapidio/sysfs.txt
index 97f71ce575d..19878179da4 100644
--- a/Documentation/rapidio/sysfs.txt
+++ b/Documentation/rapidio/sysfs.txt
@@ -88,3 +88,20 @@ that exports additional attributes.
errlog - reads contents of device error log until it is empty.
+5. RapidIO Bus Attributes
+RapidIO bus subdirectory /sys/bus/rapidio implements the following bus-specific
+ scan - allows to trigger enumeration discovery process from user space. This
+ is a write-only attribute. To initiate an enumeration or discovery
+ process on specific mport device, a user needs to write mport_ID (not
+ RapidIO destination ID) into this file. The mport_ID is a sequential
+ number (0 ... RIO_MAX_MPORTS) assigned to the mport device.
+ For example, for a machine with a single RapidIO controller, mport_ID
+ for that controller always will be 0.
+ To initiate RapidIO enumeration/discovery on all available mports
+ a user must write '-1' (or RIO_MPORT_ANY) into this attribute file.