From: "Ivo Manca" <pinkel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: i2c-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org
Subject: i2c-i801: Regression between 2.6.19-1 & 2.6.23.9
Date: Wed, 9 Jan 2008 12:08:28 +0100 [thread overview]
Message-ID: <dba8564e0801090308j34215f98rd758dff3702b194@mail.gmail.com> (raw)
Hey all,
Trying to test interrupt support for i801 I learned that somehow
between kernel version 2.6.22.14 and 2.6.23.9, something went wrong
with the bus driver. Is this a known issue?
When I try to use i2cdump to block-read an EEP OM, my i2cbus hangs.
Please find my output for 2.6.19-1 (working), 2.6.22.14-72 (working)
and 2.6.23.9-85 (not working).
Note: SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R)
Ivo
[root@localhost ~]# uname -r
2.6.19-1.2911.fc6
[root@localhost ~]# modprobe i2c-dev
[root@localhost ~]# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: XX XX XX XX XX 08 XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX 44 XX XX XX XX XX XX XX XX XX XX XX
50: 50 XX XX XX 54 55 XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX 69 XX XX XX XX XX XX
70: XX XX XX 73 XX XX XX XX
[root@localhost ~]# i2cdump -y 0 0x55 s
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 08 07 0d 0a 01 40 00 04 60 70 00 82 08 00 01 0e ?????@.?`p.??.??
10: 04 0c 01 02 20 c0 75 70 00 00 48 30 48 2a 40 75 ???? ?up..H0H*@u
[root@localhost ~]# i2cdump -y 0 0x55 s
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 08 07 0d 0a 01 40 00 04 60 70 00 82 08 00 01 0e ?????@.?`p.??.??
10: 04 0c 01 02 20 c0 75 70 00 00 48 30 48 2a 40 75 ???? ?up..H0H*@u
====
[root@localhost ~]# uname -r
2.6.22.14-72.fc6
[root@localhost ~]# modprobe i2c-dev
[root@localhost ~]# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: XX XX XX XX XX 08 XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX 44 XX XX XX XX XX XX XX XX XX XX XX
50: 50 XX XX XX 54 55 XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX 69 XX XX XX XX XX XX
70: XX XX XX 73 XX XX XX XX
[root@localhost ~]# i2cdump -y 0 0x55 s
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 08 07 0d 0a 01 40 00 04 60 70 00 82 08 00 01 0e ?????@.?`p.??.??
10: 04 0c 01 02 20 c0 75 70 00 00 48 30 48 2a 40 75 ???? ?up..H0H*@u
[root@localhost ~]# i2cdump -y 0 0x55 s
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 08 07 0d 0a 01 40 00 04 60 70 00 82 08 00 01 0e ?????@.?`p.??.??
10: 04 0c 01 02 20 c0 75 70 00 00 48 30 48 2a 40 75 ???? ?up..H0H*@u
====
[root@localhost ~]# uname -r
2.6.23.9-85.fc8
[root@localhost ~]# modprobe i2c-dev
[root@localhost ~]# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- 08 -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- 44 -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- 54 55 -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- 69 -- -- -- -- -- --
70: -- -- -- 73 -- -- -- --
[root@localhost ~]# i2cdump -y 0 0x55 s
Error: Block read failed, return code -1
[root@localhost ~]# i2cdump -y 0 0x55 s
Error: Block read failed, return code -1
(i2c Bus hangs completely, poweroff needed.)
next reply other threads:[~2008-01-09 11:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-09 11:08 Ivo Manca [this message]
[not found] ` <dba8564e0801090308j34215f98rd758dff3702b194-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-01-09 12:53 ` i2c-i801: Regression between 2.6.19-1 & 2.6.23.9 Jean Delvare
[not found] ` <20080109135341.461688d1-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2008-01-09 13:47 ` i2c-i801: Regression between 2.6.22.9 " Ivo Manca
[not found] ` <4784D068.8080401-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2008-01-09 14:42 ` Jean Delvare
[not found] ` <20080109154216.3cec6053-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2008-01-09 18:09 ` Ivo Manca
[not found] ` <47850DDB.5080101-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2008-01-10 14:09 ` Jean Delvare
[not found] ` <20080110150917.646c2677-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2008-02-08 16:22 ` I2c-i801 interrupt support (was: Re: i2c-i801: Regression between 2.6.22.9 & 2.6.23.9) Ivo Manca
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