[W1] W1 search/alarm search documentation.

[Evgeniy Polyakov <zbr@ioremap.net>]

Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
---
 Documentation/w1/w1.netlink |   18 +++++++++++++++++-
 1 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/Documentation/w1/w1.netlink b/Documentation/w1/w1.netlink
index eae5c8b..c98ca30 100644
--- a/Documentation/w1/w1.netlink
+++ b/Documentation/w1/w1.netlink
@@ -74,7 +74,23 @@ format:
 	Each message is at most 4k in size, so if number of master devices
 	exceeds this, it will be split into several messages, cn.seq will be
 	increased for each one.
-	
+
+W1 search and alarm search commands.
+request:
+[cn_msg]
+  [w1_netlink_msg type = W1_MASTER_CMD id is equal to the bus master id to use for searching]
+  [w1_netlink_cmd cmd = W1_CMD_SEARCH or W1_CMD_ALARM_SEARCH]
+
+reply:
+  [cn_msg, ack = 1 and increasing, 0 means the last message, seq is equal to the request seq]
+  [w1_netlink_msg type = W1_MASTER_CMD]
+  [w1_netlink_cmd cmd = W1_CMD_SEARCH or W1_CMD_ALARM_SEARCH
+	len is equal to number of IDs multiplied by 8]
+  [64bit-id0 ... 64bit-idN]
+Length in each header corresponds to the size of the data behind it, so
+w1_netlink_cmd->len = N * 8; where N is number of IDs in this message. Can be zero.
+w1_netlink_msg->len = sizeof(struct w1_netlink_cmd) + N * 8;
+cn_msg->len = sizeof(struct w1_netlink_msg) + sizeof(struct w1_netlink_cmd) + N*8;
 
 Operation steps in w1 core when new command is received.
 =======================================================
-- 
1.5.2.5