This patch adds polling mode support for i2c-s3c2410 driver.The
SATA PHY controller's CMU and TRSV block's are of I2C register
map in exynos5250.These blocks can be configured using i2c.

But i2c controller instance on which these block's sits lacks an
interrupt line.Also the current i2c-s3c2410 driver is only interrupt
driven, thus a polling mode support is required in the driver for
supporting this controller. This patch adds this support to the driver.
Signed-off-by: NVasanth Ananthan <vasanth.a@samsung.com>
Signed-off-by: NYuvaraj Kumar C D <yuvaraj.cd@samsung.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

If a reset GPIO support is specified, request the GPIO and get the chip
out of reset at probe time.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Tested with a r7s72100 genmai board acessing an eeprom.
Signed-off-by: NWolfram Sang <wsa@sang-engineering.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This was tested on a NETGEAR ReadyNAS 2120 device (Marvell Armada XP
based board, via DT).
Signed-off-by: NArnaud Ebalard <arno@natisbad.org>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Introduce support for Broadcom Serial Controller (BSC) I2C bus found
in the Kona family of Mobile SoCs.  FIFO hardware is utilized but only
standard mode (100kHz), fast mode (400kHz), fast mode plus (1MHz), and
I2C high-speed (3.4 MHz) bus speeds are supported.
Signed-off-by: NTim Kryger <tim.kryger@linaro.org>
Reviewed-by: NMatt Porter <matt.porter@linaro.org>
Reviewed-by: NMarkus Mayer <markus.mayer@linaro.org>
[wsa: fixed Kconfig sorting, squashed broken out patches into one]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

As we claim to support device tree for mach-omap2, we
should have the necessary flags in the driver to make it
usable.

Cc: linux-i2c@vger.kernel.org
Acked-by: NWolfram Sang <wsa@the-dreams.de>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This patch adds support to SSC (Synchronous Serial Controller)
I2C driver. This IP also supports SPI protocol, but this is not
the aim of this driver.

This IP is embedded in all ST SoCs for Set-top box platorms, and
supports I2C Standard and Fast modes.
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Adds support for High Speed I2C driver found in Exynos5 and
later SoCs from Samsung.

Driver only supports Device Tree method.
Signed-off-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: NTaekgyun Ko <taeggyun.ko@samsung.com>
Reviewed-by: NSimon Glass <sjg@google.com>
Signed-off-by: NYuvaraj Kumar C D <yuvaraj.cd@samsung.com>
Signed-off-by: NAndrew Bresticker <abrestic@google.com>
[wsa: rebased to v3.12-rc4 (no of_i2c.h anymore)]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This is based on the work of Teddy Reed <teddy@prosauce.org> published
on GitHub:
 https://github.com/theopolis/tpm-i2c-atmel.git
 34894b988b67e0ae55088d6388e77b0dbf10c07d

That driver was never merged, I have taken it as a starting port,
forward ported, tested and revised the driver:
 - Make it broadly textually similar to the Infineon and Nuvoton I2C
   driver
 - Place everything in a format suitable for mainline inclusion
 - Use high level I2C functions i2c_master_send and
   i2c_master_recv for data xfer
 - Use the timeout system from the core code, by faking out a status
   register
 - Only I2C transfer the number of bytes in the reply, not a fixed
   message size.
 - checkpatch cleanups
 - Testing on ARM Kirkwood, with this device tree, using a
   AT97SC3204T-X1A180
        tpm@29 {
                compatible = "atmel,at97sc3204t";
                reg = <0x29>;
        };
Signed-off-by: NTeddy Reed <teddy@prosauce.org>
[jgg: revised and tested]
Signed-off-by: NJason Gunthorpe <jgunthorpe@obsidianresearch.com>
[phuewe: minor whitespace changes]
Signed-off-by: NPeter Huewe <peterhuewe@gmx.de>

This chip is/was also branded as a Winbond WPCT301.

Originally written by Dan Morav <dmorav@nuvoton.com> and posted to LKML:
https://lkml.org/lkml/2011/9/7/206

The original posting was not merged, I have taken it as a
starting point, forward ported, tested and revised the driver:
 - Rework interrupt handling to work properly with level triggered
   interrupts. The old version just locked up.
 - Synchronize various items with Peter Huewe's Infineon driver:
    * Add durations/timeouts sysfs calls
    * Remove I2C device auto-detection
    * Don't fiddle with chip->release
    * Call tpm_dev_vendor_release in the probe error path
    * Use MODULE_DEVICE_TABLE for the I2C ids
    * Provide OF compatible strings for DT support
    * Use SIMPLE_DEV_PM_OPS
    * Use module_i2c_driver
 - checkpatch cleanups
 - Testing on ARM Kirkwood with GPIO interrupts, with this device tree:
	tpm@57 {
                compatible = "nuvoton,npct501";
                reg = <0x57>;
                interrupt-parent = <&gpio1>;
                interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
        };
Signed-off-by: NDan Morav <dmorav@nuvoton.com>
[jgg: revised and tested]
Signed-off-by: NJason Gunthorpe <jgunthorpe@obsidianresearch.com>
[phuewe: minor whitespace changes, fixed module name in kconfig]
Signed-off-by: NPeter Huewe <peterhuewe@gmx.de>

This patch adds Device Tree support to the i2c-rcar driver and respective
documentation.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Reported-by: NMark Rutland <mark.rutland@arm.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

use exact SoC revision instead of wildcard describing
the compatible property requirement in the binding
document. This will make the binding more clearer.
Signed-off-by: NJingchang Lu <b35083@freescale.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

The I2C Transaction Generator offloads CPU from managing I2C
transfer step by step.

This feature is currently only available on Armada XP, so usage of
this mechanism is activated through device tree.

Based on the work of Piotr Ziecik and rewrote to use the new way of
handling multiples i2c messages.
Signed-off-by: NPiotr Ziecik <kosmo@semihalf.com>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Adding another way that is device tree to pass the shunt resistor
value to driver except for platform data.
Signed-off-by: NTang Yuantian <Yuantian.Tang@freescale.com>
[Guenter Roeck: Added missing of.h include]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

This patch makes the SDA hold time configurable through device tree.
Signed-off-by: NChristian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: NPierrick Hascoet <pierrick.hascoet@abilis.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com> for arch/arc bits
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This commit adds checking whether clock-frequency property acquisition
has succeeded. If not, the frequency is set to 100kHz by default.

The Device Tree binding documentation is updated accordingly.

Based on the intials patches from Zbigniew Bodek
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NZbigniew Bodek <zbb@semihalf.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This patch adds support for the I2C bus controllers found on Wondermedia
8xxx-series SoCs. Only master-mode is supported.
Signed-off-by: NTony Prisk <linux@prisktech.co.nz>
[wsa: fixed one macro to shift 8 instead of 16]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This adds device tree support for the ST DDC I2C driver known
as "stu300" in the kernel tree.
Reviewed-by: NWolfram Sang <wsa@the-dreams.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix spelling typos in Documentation/devicetree/bindings.
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The i2c-arb-gpio-challenge driver implements an I2C arbitration scheme
where masters need to claim the bus with a GPIO before they can start
a transaction.  This should generally only be used when standard I2C
multimaster isn't appropriate for some reason (errata/bugs).

This driver is based on code that Simon Glass added to the i2c-s3c2410
driver in the Chrome OS kernel 3.4 tree.  The current incarnation as a
mux driver is as suggested by Grant Likely.  See
<https://patchwork.kernel.org/patch/1877311/> for some history.
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This driver adds support for Infineon's new SLB 9645 TT 1.2 I2C TPMs,
which supports clockstretching, combined reads and a bus speed of
up to 400khz. The device also has a new device id.

The driver works now also fine with device trees, so you can
instantiate your device by adding:
 +       tpm {
 +               compatible = "infineon,slb9645tt";
 +               reg = <0x20>;
 +       };
 for SLB 9645 devices or

 +       tpm {
 +               compatible = "infineon,slb9635tt";
 +               reg = <0x20>;
 +       };
 for SLB 9635 devices

to your device tree.
tpm_i2c_infineon is also retained as a compatible id as a fallback to
slb9635 protocol.

The driver was tested on Beaglebone.
Signed-off-by: NPeter Huewe <peter.huewe@infineon.com>
Signed-off-by: NKent Yoder <key@linux.vnet.ibm.com>

Add documentation for device tree binding of NVIDIA's Tegra I2C
controller driver.

Describing all compatible values used for different Tegra SoCs
in details in this documentation.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
[swarren: fixed a couple typos, trimmed examples]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

With the generic DMA device tree helper supported by mxs-dma driver,
client devices only need to call dma_request_slave_channel() for
requesting a DMA channel from dmaengine.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NWolfram Sang <wsa@the-dreams.de>

This implements a very basic I2C host driver for the BCM2835 SoC. Missing
features so far are:

* 10-bit addressing.
* DMA.
Reviewed-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NWolfram Sang <wolfram@the-dreams.de>

Add support for the TI / Burr-Brown INA209 voltage / current / power
monitor.

Cc: Paul Hays <haysp@magma.net>
Cc: Ira W. Snyder <iws@ovro.caltech.edu>
Tested-by: NIra W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Add support for MAX6581, MAX6602, MAX6622, MAX6636, MAX6689, MAX6693,
MAX6694, MAX6697, MAX6698, and MAX6699 temperature sensors
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Reviewed-by: NJean Delvare <khali@linux-fr.org>

Signed-off-by: NGiridhar Maruthy <giridhar.m@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

Add i2c driver to enable access to devices behind CBUS on Nokia Internet
Tablets.

The patch also adds CBUS I2C configuration for N8x0 which is one of the
users of this driver.
Acked-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

i2c: ocores: Add support for the GRLIB port of the controller and use function pointers for getreg and setreg functions

The registers in the GRLIB port of the controller are 32-bit and in big endian
byte order. The PRELOW and PREHIGH registers are merged into one register. The
subsequent registers have their offset decreased accordingly. Hence the register
access needs to be handled in a non-standard manner using custom getreg and
setreg functions.

Add setreg and getreg functions for different register widths and let oc_setreg
and oc_getreg use function pointers to call the appropriate functions.

A type is added as the data of the of match table entries. A new entry with a
different compatible string is added to the table. The type of that entry
triggers usage of the custom grlib functions by setting the setreg and getreg
function pointers.
Signed-off-by: NAndreas Larsson <andreas@gaisler.com>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

This patch adds support for pin configuration using pinctrl subsystem
to the i2c-s3c2410 driver.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

Allow the i2c-mux-gpio to be used by a device tree enabled device. The
bindings are inspired by the one found in the i2c-mux-pinctrl driver.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NPeter Korsgaard <peter.korsgaard@barco.com>

[wsa: fixed some whitespace]
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

Filenames of devictree binding documentation seems to be arbitrary and
for me it is unneeded hazzle to find the corresponding documentation for
a specific driver.

Naming the description the same as the driver is a lot easier and makes
sense to me since the driver defines the binding it understands.

Also, remove a reference in one source to the binding documentation, since path
information easily gets stale.
Signed-off-by: NWolfram Sang <wolfram@the-dreams.de>
Cc: Rob Herring <robherring2@gmail.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Update i2c trivial-devices list by adding the description for
ti,tmp275 temperature sensor and taos,tsl2550 ambient light
sensor.
Signed-off-by: NAnilKumar Ch <anilkumar@ti.com>
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>

This is some amount of work left/forgot from device tree conversion.
Instead of checking cpu_is_xxx to determine the controller type, the
driver should use platform_device_id, which should match the device
tree compatible string.

The patch changes the driver to use platform_device_id rather than
cpu_is_xxx to determine the controller type/version.  It also updates
the platform code and device tree source accordingly.

As the result, mach/hardware.h inclusion gets removed from the driver.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Cc: linux-i2c@vger.kernel.org

This patch implements DMA support into mxs-i2c. DMA transfers are now enabled
via DT. The DMA operation is enabled by default.
Signed-off-by: NMarek Vasut <marex@denx.de>
Tested-by: NFabio Estevam <fabio.estevam@freescale.com>

[wsa: rebased to 3.6-rc7]
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

Here we apply the bindings required for successful Device Tree
probing of the i2c-nomadik driver.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>

Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Acked-by: NNikolaus Voss <n.voss@weinmann.de>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>