This is a note to let you know that I've just added the patch titled
staging: comedi: das08: Correct AI encoding for das08jr-16-ao
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
staging-comedi-das08-correct-ai-encoding-for-das08jr-16-ao.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7672832a4ebe555d580a0cdb41a09da0cb8264ba Mon Sep 17 00:00:00 2001
From: Ian Abbott <abbotti@xxxxxxxxx>
Date: Fri, 31 Aug 2012 20:41:29 +0100
Subject: staging: comedi: das08: Correct AI encoding for das08jr-16-ao
From: Ian Abbott <abbotti@xxxxxxxxx>
commit e6391a182865efc896cb2a8d79e07b7ac2f45b48 upstream.
The element of `das08_boards[]` for the 'das08jr-16-ao' board has the
`ai_encoding` member set to `das08_encode12`. It should be set to
`das08_encode16` same as the 'das08jr/16' board. After all, this board
has 16-bit AI resolution.
The description of the A/D LSB register at offset 0 seems incorrect in
the user manual "cio-das08jr-16-ao.pdf" as it implies that the AI
resolution is only 12 bits. The diagrams of the A/D LSB and MSB
registers show 15 data bits and a sign bit, which matches what the
software expects for the `das08_encode16` AI encoding method.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
[bwh: Backported to 3.2: adjust indentation]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: Yijing Wang <wangyijing@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/das08.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/comedi/drivers/das08.c
+++ b/drivers/staging/comedi/drivers/das08.c
@@ -385,7 +385,7 @@ static const struct das08_board_struct d
.ai = das08_ai_rinsn,
.ai_nbits = 16,
.ai_pg = das08_pg_none,
- .ai_encoding = das08_encode12,
+ .ai_encoding = das08_encode16,
.ao = das08jr_ao_winsn,
.ao_nbits = 16,
.di = das08jr_di_rbits,
Patches currently in stable-queue which might be from abbotti@xxxxxxxxx are
queue-3.4/staging-comedi-das08-correct-ai-encoding-for-das08jr-16-ao.patch
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