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: NJean Delvare <khali@linux-fr.org>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

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: NJean Delvare <khali@linux-fr.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

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: NMark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This patch removes an init-time kernel log message.
http://marc.theaimsgroup.com/?l=linux-kernel&m=114232987208628&w=3Signed-off-by: NMark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This patch adds I2C_CLASS_HWMON to the ixp4xx bus driver.
Signed-off-by: NAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Add Broadcom HT-1000 south bridge's PCI ID to i2c-piix driver. Note
that at least on Supermicro H8SSL it uses non-standard SMBHSTCFG = 3
and standard values like 0 or 9 causes hangup.
Signed-off-by: NMartin Devera <devik@cdi.cz>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Static mutexes can be initialized at declaration time.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Drop a redundant mutex in driver i2c-ali1535. The struct i2c_adapter
includes a mutex for the same purpose, operated by i2c-core.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Properly set the name member of the i2c_adapter structure of the ite
i2c adapter driver.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Drop the i2c-frodo bus driver. It isn't referenced by the build
system, and depends on code which was never included in 2.6 kernels.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Cleanup after the semaphores to mutexes conversions in the i2c
subsystem.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

semaphore to mutex conversion.

the conversion was generated via scripts, and the result was validated
automatically via a script as well.

build tested.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

scx200_acb is only useful on a few Geode-based systems, and won't
compile on non-x86 systems due to the lack of asm/msr.h, as reported
by Andrew Morton. Thus, we should make that driver depend on X86.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

scx200_acb: Minimal documentation update
Signed-off-by: NBen Gardner <bgardner@wabtec.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

scx200_acb: Fix and speed up the poll loop
Signed-off-by: NBen Gardner <bgardner@wabtec.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

scx200_acb: Add support for the CS5535/CS5536
Signed-off-by: NBen Gardner <bgardner@wabtec.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

scx200_acb: remove use of lock_kernel()
Signed-off-by: NBen Gardner <bgardner@wabtec.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

scx200_acb: refactor/simplify code (no functional changes)
Signed-off-by: NBen Gardner <bgardner@wabtec.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

scx200_acb: debug log cleanup
Signed-off-by: NBen Gardner <bgardner@wabtec.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

scx200_acb: Whitespace and comment cleanup
Signed-off-by: NBen Gardner <bgardner@wabtec.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The patch below converts a few i2c semaphores to mutexes
Signed-off-by: NArjan van de Ven <arjan@infradead.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

platform_get_irq*() now returns on -ENXIO when the resource cannot be
found.  Ensure all users of platform_get_irq*() handle this error
appropriately.
Signed-off-by: NDavid Vrabel <dvrabel@arcom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Probe and remove methods are now defined at bus level. No more need to
redefine them at driver level in i2c-isa.

This lets us get rid of these annoying messages:
Driver 'it87-isa' needs updating - please use bus_type methods

Thanks to Nicolas Mailhot for reporting the problem and testing the fix.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]). Some trailing
whitespaces are also removed.
Signed-off-by: NTobias Klauser <tklauser@nuerscht.ch>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This patch adds the Intel ICH8 DID to the i2c-i801.c and Kconfig files for I2C
support.
Signed-off-by: NJason Gaston <Jason.d.gaston@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Patch from Richard Purdie

This patch adds a check to see if the pxa i2c interface is enabled
before allowing it to be used and resets it if found to be disabled.
This automatically restores the interface if the device has been
suspended and resumed without causing any suspend/resume call ordering
issues.

The patch also fixes a build warning and adds an appropriate module
licence (the module is gpl according to the header).
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This is the continuation of the previous patch. This one removes the old
PowerMac i2c drivers (i2c-keywest and i2c-pmac-smu) and replaces them
both with a single stub driver that uses the new PowerMac low i2c layer.

Now that i2c-keywest is gone, the low-i2c code is extended to support
interrupt driver transfers. All i2c busses now appear as platform
devices. Compatibility with existing drivers should be maintained as the
i2c bus names have been kept identical, except for the SMU bus but in
that later case, all users has been fixed.

With that patch added, matching a device node to an i2c_adapter becomes
trivial.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This is the first part of a rework of the PowerMac i2c code. It
completely reworks the "low_i2c" layer. It is now more flexible,
supports KeyWest, SMU and PMU i2c busses, and provides functions to
match device nodes to i2c busses and adapters.

This patch also extends & fix some bugs in the SMU driver related to i2c
support and removes the clock spreading hacks from the pmac feature code
rather than adapting them to the new API since they'll be replaced by
the platform function code completely in patch 3/5
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This patch unifies udbg for both ppc32 and ppc64 when building the
merged achitecture. xmon now has a single "back end". The powermac udbg
stuff gets enriched with some ADB capabilities and btext output. In
addition, the early_init callback is now called on ppc32 as well,
approx. in the same order as ppc64 regarding device-tree manipulations.
The init sequences of ppc32 and ppc64 are getting closer, I'll unify
them in a later patch.

For now, you can force udbg to the scc using "sccdbg" or to btext using
"btextdbg" on powermacs. I'll implement a cleaner way of forcing udbg
output to something else than the autodetected OF output device in a
later patch.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This is needs to be visible to other architectures using the AMBA
bus and peripherals.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

When the i2c-mv64xxx i2c driver is signalled to abort a transaction,
it aborts it immediately by issuing a stop condition on the bus.
This violates the i2c protocol and can cause what appears to be an i2c
bus hang.  This patch delays issuing the stop condition until the i2c
device can reasonably expect a stop condition.

Also includes a minor fixup.
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

One more supported PCI ID for the i2c-nforce2 driver.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Add the ibm_iic driver to the HWMON class so it will scan the
bus for connected hardware monitor sensors.
Signed-off-by: NMartin Hicks <mort@bork.org>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

We should use the i2c_driver.driver's .name and .owner fields
instead of the i2c_driver's ones.

This patch updates the core of the i2c drivers: it removes .name and
.owner fields from the struct i2c_device and modify various
functions to use struct device fields instead.
Signed-off-by: NLaurent Riffard <laurent.riffard@free.fr>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The following patch adds support for the Barco LPT->DVI I2C adapter to
the i2c-parport driver.
Signed-off-by: NPeter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This patch tweaks i2c-i801.c so that the driver always sets the SMBAUXCTL
register (which enables/disables PEC) explicitly before each transaction.
Signed-off-by: NMark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

It seems that clk_use() and clk_unuse() are additional complexity
which isn't required anymore.  Remove them from the clock framework
to avoid the additional confusion which they cause, and update all
ARM machine types except for OMAP.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The busses/i2c-mv64xxx.c driver doesn't currently compile because of an
incorrect argument to dev_err().  This patch fixes that.
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Platform device conversion missed a couple of spots.
Signed-off-by: NDeepak Saxena <dsaxena@plexity.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>