The patch titled
i2c-i801: Fix resume when PEC is used
has been added to the -mm tree. Its filename is
i2c-i801-fix-resume-when-pec-is-used.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Jean Delvare <khali@xxxxxxxxxxxx>
Fix for bug #6395:
Fail to resume on Tecra M2 with ADM1032 and Intel 82801DBM
The BIOS of the Tecra M2 doesn't like it when it has to reboot or resume
after the i2c-i801 driver has left the SMBus in PEC mode. The most simple
fix is to clear the PEC bit after after every transaction. That's what
this driver was doing up to 2.6.15 (inclusive).
Thanks to Daniele Gaffuri for the very good report.
Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/i2c/busses/i2c-i801.c | 5 +++++
1 files changed, 5 insertions(+)
diff -puN drivers/i2c/busses/i2c-i801.c~i2c-i801-fix-resume-when-pec-is-used drivers/i2c/busses/i2c-i801.c
--- devel/drivers/i2c/busses/i2c-i801.c~i2c-i801-fix-resume-when-pec-is-used 2006-04-19 23:38:28.000000000 -0700
+++ devel-akpm/drivers/i2c/busses/i2c-i801.c 2006-04-19 23:38:28.000000000 -0700
@@ -478,6 +478,11 @@ static s32 i801_access(struct i2c_adapte
ret = i801_transaction();
}
+ /* Some BIOSes don't like it when PEC is enabled at reboot or resume
+ time, so we forcibly disable it after every transaction. */
+ if (hwpec)
+ outb_p(0, SMBAUXCTL);
+
if(block)
return ret;
if(ret)
_
Patches currently in -mm which might be from khali@xxxxxxxxxxxx are
origin.patch
i2c-i801-fix-resume-when-pec-is-used.patch
fs-fix-ocfs2-warning-when-debug_fs-is-not-enabled.patch
scx200_acb-fix-for-cs5535-eratta.patch
scx200_acb-use-pci-i-o-resource-when-appropriate.patch
i2c-add-support-for-virtual-i2c-adapters.patch
i2c-pca954x-i2c-mux-driver.patch
i2c-mpc-fix-up-error-handling.patch
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