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authorWolfram Sang <wsa+renesas@sang-engineering.com>2018-12-19 19:48:17 +0300
committerWolfram Sang <wsa@the-dreams.de>2019-01-08 23:01:07 +0300
commit9ac6cb5fbb1781d120ca0ad29d014d35c9c3f0c4 (patch)
treeb44a8a6d12a88ed839e4b6bd670a32e59ade2b95 /Documentation/i2c
parentbfeffd155283772bbe78c6a05dec7c0128ee500c (diff)
downloadlinux-9ac6cb5fbb1781d120ca0ad29d014d35c9c3f0c4.tar.xz
i2c: add suspended flag and accessors for i2c adapters
A few drivers open code the handling of suspended adapters. It could be handled by the core, though, to ensure generic handling. This patch adds the flag and accessor functions. The usage of these helpers is optional, though. See the kerneldoc in this patch. Using the new flag, we now reject further transfers if the adapter is already marked suspended. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation/i2c')
-rw-r--r--Documentation/i2c/fault-codes4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/i2c/fault-codes b/Documentation/i2c/fault-codes
index 47c25abb7d52..0cee0fc545b4 100644
--- a/Documentation/i2c/fault-codes
+++ b/Documentation/i2c/fault-codes
@@ -112,6 +112,10 @@ EPROTO
case is when the length of an SMBus block data response
(from the SMBus slave) is outside the range 1-32 bytes.
+ESHUTDOWN
+ Returned when a transfer was requested using an adapter
+ which is already suspended.
+
ETIMEDOUT
This is returned by drivers when an operation took too much
time, and was aborted before it completed.