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authorDavid Fries <David@Fries.net>2014-01-16 04:29:23 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-07 23:40:18 (GMT)
commitd53f0a2c0574e6414dceeec59ae5a9e749bd058b (patch)
tree7cd0c86e616ea1a271e13cff8aad611e51c469d2 /Documentation/w1
parentda78b7e74ac5964015bed78d27e1fca8bae8e29a (diff)
w1: ds2490 fix and enable hardware search
The hardware search was failing without the COMM_RST flag. Enabled the flag and rewrote the function to handle more than one buffer of results and to continuing where the search left off. Remove hardware search note from the limitations now that it works. The "w1: ds2490 USB setup fixes" change went from 23.16 seconds to about 3 seconds, this takes the time for the search down to .307346 seconds. Signed-off-by: David Fries <David@Fries.net> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/w1')
-rw-r--r--Documentation/w1/masters/ds24902
1 files changed, 0 insertions, 2 deletions
diff --git a/Documentation/w1/masters/ds2490 b/Documentation/w1/masters/ds2490
index 28176de..3e09115 100644
--- a/Documentation/w1/masters/ds2490
+++ b/Documentation/w1/masters/ds2490
@@ -21,8 +21,6 @@ Notes and limitations.
- The weak pullup current is a minimum of 0.9mA and maximum of 6.0mA.
- The 5V strong pullup is supported with a minimum of 5.9mA and a
maximum of 30.4 mA. (From DS2490.pdf)
-- While the ds2490 supports a hardware search the code doesn't take
- advantage of it (in tested case it only returned first device).
- The hardware will detect when devices are attached to the bus on the
next bus (reset?) operation, however only a message is printed as
the core w1 code doesn't make use of the information. Connecting

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