Fix:

drivers/i2c/busses/i2c-jz4780.c: In function 'jz4780_i2c_readw':
drivers/i2c/busses/i2c-jz4780.c:181:2: error:
		implicit declaration of function 'readw'
drivers/i2c/busses/i2c-jz4780.c: In function 'jz4780_i2c_writew':
drivers/i2c/busses/i2c-jz4780.c:187:2: error:
		implicit declaration of function 'writew'

seen with sparc64:allmodconfig and m68k:allmodconfig.

The driver has to include linux/io.h.

Fixes: ba92222e ("i2c: jz4780: Add i2c bus controller driver
	for Ingenic JZ4780")
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add an I2C bus driver i2c-xlp9xx.c to support the I2C block in the
XLP9xx/XLP5xx MIPS SoC. Update Kconfig and Makefile to add the
CONFIG_I2C_XLP9XX option.
Signed-off-by: NSubhendu Sekhar Behera <sbehera@broadcom.com>
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Reviewed-by: NRay Jui <rjui@broadcom.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Having a board where the I2C bus locks up occasionally made it clear
that the bus recovery in the i2c-davinci driver will only work on
some boards, because on regular boards, this will only toggle GPIO
lines that aren't muxed to the actual pins.

The I2C controller on SoCs like da850 (and da830), Keystone 2 has the
built-in capability to bit-bang its lines by using the ICPFUNC registers
of the i2c controller.
Implement the suggested procedure by toggling SCL and checking SDA using
the ICPFUNC registers of the I2C controller when present. Allow platforms
to indicate the presence of the ICPFUNC registers with a has_pfunc platform
data flag and add optional DT property "ti,has-pfunc" to indicate
the same in DT.
Reviewed-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: NAlexander Sverdlin <alexander.sverdlin@nokia.com>
Tested-by: NMichael Lawnick <michael.lawnick@nokia.com>
Signed-off-by: NBen Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: NMike Looijmans <milo-software@users.sourceforge.net>
[grygorii.strashko@ti.com: combined patches from Ben Gardiner and
Mike Looijmans and reimplemented ICPFUNC bus recovery using I2C
bus recovery infrastructure]
Signed-off-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This patch converts Davinci I2C driver to use I2C bus recovery
infrastructure, introduced by commit 5f9296ba ("i2c: Add
bus recovery infrastructure").

The i2c_bus_recovery_info is configured for Davinci I2C adapter
only in case scl_pin is provided in platform data.

As the controller must be held in reset while doing so, the
recovery routine must re-init the controller. Since this was already
being done after each call to i2c_recover_bus, move those calls into
the recovery_prepare/unprepare routines and as well.
Acked-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Adds the i2c bus controller driver for the Ingenic JZ4780 SoC.
Signed-off-by: NZubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This patch makes sure the platform device tree node is inherited by
the adapter device. This allows the DLN2 bus to work with i2c devices
defined in the device tree.
Signed-off-by: NOctavian Purdila <octavian.purdila@intel.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

wait_for_completion_timeout return 0 (timeout) or >=1 (completion) so the check
for >= 0 is always true and can be dropped implying that r==-EREMOTEIO and thus
the return of -EREMOTEIO can be done in the   if (dev->buf_len)  branch.
As wait_for_completion_timeout returns unsigned long not int, and   int r   is
exclusively used for wait_for_completion_timeout it is renamed and the type
changed to unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NAlexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

ISR should not return IRQ_HANDLED for not handling anything.
This patch fixes the return value of ISR for the same case.
Signed-off-by: NAmit Singh Tomar <amit.tomar@freescale.com>
Acked-by: NDanielle Costantino <danielle.costantino@gmail.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

After more discussion, brave users, and additional datasheet evaluation,
some API updates for the new I2C slave framework became imminent. The
slave events now get some easier to understand naming. Also, the event
handling has been simplified to only need a single call to the slave
callback when an action by the backend is required.
Reported-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

The CX92755 is an SoC in the Conexant Digicolor series. The devicetree binding
document describes the I2C controller on the CX92755 SoC, that is also shared
by some other SoCs in the Digicolor series. The driver adds support.
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
[wsa: fixed spaces around operators]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Now that the ACPI companions of devices are represented by pointers
to struct fwnode_handle, it is not quite efficient to check whether
or not an ACPI companion of a device is present by evaluating the
ACPI_COMPANION() macro.

For this reason, introduce a special static inline routine for that,
has_acpi_companion(), and update the code to use it where applicable.
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

With -EPROBE_DEFER, this message is confusing and we hope for a
centralized printout in the future anyhow.
Signed-off-by: NAlexey Brodkin <abrodkin@synopsys.com>
Acked-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: NChristian Ruppert <christian.ruppert@alitech.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

For the 85xx platforms, the source clock for the i2c-mpc can change from
one SoC to another. This is documented in the AN2919 "Determining the
I2C Frequency Divider Ratio for SCL" by Freescale. Not taking this into
account can lead to the output SCL frequency to by off by an offset. It
was observed on the P2041 from the QorIQ family.

This patch fixes this problem by setting the prescaler value to the
appropriate value when required. The SoCs that required a different
prescaler than 1 are identified by reading out the SVR as discussed in
http://thread.gmane.org/gmane.linux.drivers.devicetree/94247/focus=20556Signed-off-by: NValentin Longchamp <valentin.longchamp@keymile.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Return type of wait_for_completion_timeout is unsigned long not int.
Appropriately typed/named variable are added and assignment fixed up.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NJames Hogan <james.hogan@imgtec.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Return type of wait_for_completion_timeout is unsigned long not int. This
patch adds a timeout variable of appropriate type and fixes up the assignment.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int. The
return variable is renamed to reflect its use and the type adjusted to
unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of read_i2c() is int not u32. As the assignments to status
are consistent with int here its type is changed to int.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int. as
timeout is used for wait_for_completion_timeout exclusively here its
type is simply changed to unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int.
An appropriate variable of type unsigned long is introduced and the
assignments fixed up.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int. As
ret is in used for other calls a new appropriately typed variable timeout
is added to handle wait_for_completion_timeout
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int. as
wait_result is only used for wait_for_completion_timeout here the type
is simply changed to unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int. as
time_left is used for wait_for_completion_timeout exclusively here its
type is simply changed to unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int, rather
than introducing a new variable the wait_for_completion_timeout is moved
into the if condition as the return value is only used to detect timeout.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Reviewed-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int. The
return variable is renamed to make the timeout condition clearly readable
and the type adjusted to unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This is only an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var).
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

return type of wait_for_completion_timeout is unsigned long not int. As ret
was only used for wait_for_completion_timeout here it is renamed to time_left
the type changed to unsigned long and references fixed up.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Return type of wait_for_completion_timeout is unsigned long not int.
An appropriately named unsigned long is added and the assignment fixed up.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Hardware can do write-then-anything. Activate that.
Signed-off-by: NNeelesh Gupta <neelegup@linux.vnet.ibm.com>
[wsa: cosmetic updates]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Tested-by: NRay Jui <rjui@broadcom.com>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Tested-by: NIvan T. Ivanov <iivanov@mm-sol.com>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Tested-by: NNeelesh Gupta <neelegup@linux.vnet.ibm.com>

Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Tested-By: NLudovic Desroches <ludovic.desroches@atmel.com>

Simplifies the code a bit and makes easier to disable PCI device on driver
detach by removing the pcim_pin_device() call in the future if needed.

Reason why i2c-i801.c doesn't ever call pci_disable_device() was because it
made some systems to hang during power-off. See commit d6fcb3b9
("[PATCH] i2c-i801.c: don't pci_disable_device() after it was just enabled")
and
http://marc.info/?l=linux-kernel&m=115160053309535&w=2Signed-off-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Since pci_disable_device() is not called from i801_suspend() and power
state is set already it means that subsequent pci_enable_device() calls do
practically nothing but monotonically increase struct pci_dev enable_cnt.
Signed-off-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>