linux.git/drivers/i2c, branch v2.6.17.10

i2c: Fix 'ignore' module parameter handling in i2c-core

2006-08-07T03:52:13+00:00

This patch fixes a bug in the handling of 'ignore' module parameters of I2C
client drivers.

Signed-off-by: Mark M. Hoffman 
Signed-off-by: Jean Delvare 
Signed-off-by: Greg Kroah-Hartman

scx200_acb: Fix the block transactions

2006-08-07T03:52:13+00:00

The scx200_acb i2c bus driver pretends to support SMBus block
transactions, but in fact it implements the more simple I2C block
transactions. Additionally, it lacks sanity checks on the length
of the block transactions, which could lead to a buffer overrun.

This fixes an oops reported by Alexander Atanasov:
http://marc.theaimsgroup.com/?l=linux-kernel&m=114970382125094

Thanks to Ben Gardner for fixing my bugs :)

Signed-off-by: Jean Delvare 
Signed-off-by: Greg Kroah-Hartman

scx200_acb: Fix the state machine

2006-08-07T03:52:13+00:00

Fix the scx200_acb state machine:

* Nack was sent one byte too late on reads >= 2 bytes.
* Stop bit was set one byte too late on reads.

Signed-off-by: Jean Delvare 
Signed-off-by: Greg Kroah-Hartman

[PATCH] scx200_acb: fix section mismatch warning

2006-05-26T18:55:46+00:00

WARNING: drivers/i2c/busses/scx200_acb.o - Section mismatch: reference to
.init.text: from .text after 'scx200_add_cs553x' (at offset 0x528)

Signed-off-by: Randy Dunlap 
Signed-off-by: Jean Delvare 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] scx200_acb: Fix for the CS5535 errata

2006-05-09T20:04:21+00:00

This is a fix for the CS5535 errata 111:

When the SMBus controller tries to access a non-existing device, it sets
the NEGACK bit, SMBus I/O offset 01h[4], to 1 after it detects no
acknowledge at the ninth clock.  The specification states that the bit
can be cleared by writing a 1 to it, but under certain circumstances it
is possible for this bit to not clear.

Writing a 0 to the bit resets the internal state machine and clears the
issue.

Since all writable bits in ACBST are W1C bits (write-one-to-clear) the
second write doesn't affect any other logic except the buggy NEGACK
state machine. The second write clears an internal register which is
responsible for "overwriting" the NEGACK bit in ACBST.

Signed-off-by: Jordan Crouse 
Signed-off-by: Andrew Morton 
Signed-off-by: Jean Delvare 
Signed-off-by: Greg Kroah-Hartman

[PATCH] scx200_acb: Fix resource name use after free

2006-05-09T20:04:21+00:00

We can't pass a string on the stack to request_region. As soon as we
leave the function that stack is gone and the string is lost. Let's
use the same string we identify the i2c_adapter with instead, it's
more simple, more consistent, and just works.

This is the second half of fix to bug #6445.

Signed-off-by: Jean Delvare 
Signed-off-by: Greg Kroah-Hartman

[PATCH] scx200_acb: Fix return on init error

2006-05-09T20:04:21+00:00

The scx200_acb driver shouldn't return failure after initialization
if it successfully registered at least one i2c_adapter, else we are
leaking resources. The driver was OK in that respect up to 2.6.16, a
recent change broke it.

This is part of the fix to bug #6445.

Signed-off-by: Jean Delvare 
Cc: Ben Gardner 
Signed-off-by: Greg Kroah-Hartman

[PATCH] i2c-i801: Fix resume when PEC is used

2006-04-20T14:54:04+00:00

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 
Cc: Greg KH 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] m41t00: fix bitmasks when writing to chip

2006-04-19T16:13:49+00:00

Fix the bitmasks used when writing to the M41T00 registers.

The original code used a mask of 0x7f when writing to each register,
this is incorrect and probably the result of a copy-paste error.  As a
result years from 1980 to 1999 will be read back as 2000 to 2019.

Signed-off-by: David Barksdale 
Acked-by: Jean Delvare 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] i2c-parport: Make type parameter mandatory

2006-04-14T18:18:34+00:00

This patch forces the user to specify what type of adapter is present when
loading i2c-parport or i2c-parport-light.  If none is specified, the driver
init simply fails - instead of assuming adapter type 0.

This alleviates the sometimes lengthy boot time delays which can be caused
by accidentally building one of these into a kernel along with several i2c
slave drivers that have lengthy probe routines (e.g. hwmon drivers).

Kconfig and documentation updated accordingly.

Signed-off-by: Mark M. Hoffman 
Signed-off-by: Jean Delvare 
Signed-off-by: Greg Kroah-Hartman