The unicore32 port is removed from the kernel.
There is no point to keep stale i2c bus driver for this architecture.
Signed-off-by: NMike Rapoport <rppt@linux.ibm.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NGuenter Roeck <linux@roeck-us.net>

Add Nuvoton NPCM BMC I2C controller driver.
Signed-off-by: NTali Perry <tali.perry1@gmail.com>
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NWolfram Sang <wsa@kernel.org>

Baikal-T1 System Controller is equipped with a dedicated I2C Controller
which functionality is based on the DW APB I2C IP-core, the only
difference in a way it' registers are accessed. There are three access
register provided in the System Controller registers map, which indirectly
address the normal DW APB I2C registers space. So in order to have the
Baikal-T1 System I2C Controller supported by the common DW APB I2C driver
we created a dedicated Dw I2C controller model quirk, which retrieves the
syscon regmap from the parental dt node and creates a new regmap based on
it.
Signed-off-by: NSerge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NWolfram Sang <wsa@kernel.org>

Seeing the DW I2C driver is using flags-based accessors with two
conditional clauses it would be better to replace them with the regmap
API IO methods and to initialize the regmap object with read/write
callbacks specific to the controller registers map implementation. This
will be also handy for the drivers with non-standard registers mapping
(like an embedded into the Baikal-T1 System Controller DW I2C block, which
glue-driver is a part of this series).

As before the driver tries to detect the mapping setup at probe stage and
creates a regmap object accordingly, which will be used by the rest of the
code to correctly access the controller registers. In two places it was
appropriate to convert the hand-written read-modify-write and
read-poll-loop design patterns to the corresponding regmap API
ready-to-use methods.

Note the regmap IO methods return value is checked only at the probe
stage. The rest of the code won't do this because basically we have
MMIO-based regmap so non of the read/write methods can fail (this also
won't be needed for the Baikal-T1-specific I2C controller).
Suggested-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NSerge Semin <Sergey.Semin@baikalelectronics.ru>
Tested-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
[wsa: fix type of 'rx_valid' and remove outdated kdoc var description]
Signed-off-by: NWolfram Sang <wsa@kernel.org>

Currently Intel Baytrail I2C semaphore is a feature of the DW APB I2C
platform driver. It's a bit confusing to see it's config in the menu at
some separated place with no reference to the platform code. Let's move the
config definition to be below the I2C_DESIGNWARE_PLATFORM config and mark
it with "depends on I2C_DESIGNWARE_PLATFORM" statement. By doing so the
config menu will display the feature right below the DW I2C platform
driver item and will indent it to the right so signifying its belonging.
Signed-off-by: NSerge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NWolfram Sang <wsa@kernel.org>

DW APB I2C slave code in fact depends on the DW I2C driver core, but not
on the platform code as it used to be before commit 90bc1ee6de9f ("i2c:
designware: Allow slave mode for PCI enumerated devices"). Yes, the I2C
slave interface is currently supported by both the platform and PCI
versions of the IP core, but it still depends on the DW I2C core
functionality and must be available only if the last one is enabled.
So make sure the DW APB I2C slave config is only available if the
I2C_DESIGNWARE_CORE config is enabled.
Signed-off-by: NSerge Semin <Sergey.Semin@baikalelectronics.ru>
Acked-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: NWolfram Sang <wsa@kernel.org>

Allow slave mode for PCI enumerated devices by calling a common i2c_dw_probe()
instead of i2c_dw_probe_master().

While dropping dependency to platform driver in slave module, move its
configuration section above, closer to core.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: NWolfram Sang <wsa@kernel.org>

The BCM2711, supported by ARCH_BCM2835, also has a controller by the
brcmstb driver so let's allow it to be compiled on that platform.
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NMaxime Ripard <maxime@cerno.tech>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This commit adds I2C bus support for the Camera Control Interface
(CCI) I2C controller found on the Qualcomm SoC processors. This I2C
controller supports two masters and they are registered to the core.

CCI versions supported in the driver are msm8916, msm8996 and sdm845.

This is a rework of the patch posted by Vinod:
https://patchwork.kernel.org/patch/10569961/

With additional fixes + most of the comments addressed.
Signed-off-by: NTodor Tomov <todor.tomov@linaro.org>
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NLoic Poulain <loic.poulain@linaro.org>
Tested-by: NRobert Foss <robert.foss@linaro.org>
Reviewed-by: NBjorn Andersson <bjorn.andersson@linaro.org>
[wsa: removed err msg after platform_get_irq]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Update the help text to reflect current support devices:
1. The Exynos high speed I2C driver supports Exynos5 (ARMv7), Exynos5433
   and Exynos7 (both ARMv8) SoCs,
2. The S3C I2C driver supports S3C, S5Pv210 and Exynos{3,4,5} SoCs.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Some of the I2C bus drivers can be compile tested to increase build
coverage.  This requires also:
1. Adding dependencies on COMMON_CLK for BCM2835 and Meson I2C
   controllers,
2. Adding 'if' conditional to 'default y' so they will not get enabled
   by default on all other architectures,
3. Limiting few compile test options to supported architectures (which
   provide the readsX()/writesX() primitives).
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
[wsa: revert chunk for ZX2967. it needs more preparation]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

The driver is not 'new' anymore, so remove details from the driver it
surpassed.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

The justification of a light version of the parport driver was less
overhead for embedded systems. Well, today, even if an embedded system
still has a parport, it surely can handle the fully-fledged parport
driver. Remove it to reduce the maintenance burden.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
	$ sed -e 's/^        /\t/' -i */Kconfig
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Acked-by: NPeter Rosin <peda@axentia.se>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

There is no suffix applied to Intel Jasper Lake SOC. Remove it
from the comments and definitions. Besides that, it's a SOC,
thus replace PCH with SOC where it appropriate.

Fixes: e0c61c04 ("i2c: i801: Add support for Intel Jasper Lake")
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

The i2c subsystem was enhanced circa 2015 to support operating as
an i2c-slave device.  Prior to that, the i2c-pxa driver supported
an i2c-slave but had its own APIs.  There are no existing in-kernel
drivers or platforms that utilize the i2c-pxa APIs.

Migrate the i2c-pxa driver to the general i2c-slave APIs so that
existing drivers, such as the i2c-slave-eeprom, can be used.

This has been tested with a Marvell EspressoBin, using i2c-pxa and
i2c-slave-eeprom, acting as a slave, and a RaspeberryPi 3, using the
at24 driver, acting as a master.
Signed-off-by: NPatrick Williams <alpawi@amazon.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add support for SMBus controller on Intel Jasper Lake PCH-N.
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>

Now, the ChromeOS EC core driver has nothing related to an MFD device, so
move that driver from the MFD subsystem to the platform/chrome subsystem.
Signed-off-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NThierry Reding <thierry.reding@gmail.com>
Acked-by: NMark Brown <broonie@kernel.org>
Acked-by: NWolfram Sang <wsa@the-dreams.de>
Acked-by: NNeil Armstrong <narmstrong@baylibre.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: NBenjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: NSebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: NChanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: NGwendal Grignou <gwendal@chromium.org>
Tested-by: NGwendal Grignou <gwendal@chromium.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

This device contains both master and slave controllers which can be
enabled simultaneously. Both controllers share the same SDA/SCL lines
and interrupt source but has separate control and status registers.
Controllers also works in loopback mode - slave device can communicate
with its own master controller internally. The controller can handle up
to two addresses, both of which may be 10 bit. Most of the logic
(sending (N)ACK, handling repeated start or switching between
write/read) is handled automatically which makes working with this
controller quite easy.

For simplicity, this patch adds basic support, limiting to only one
slave address. Support for the 2nd device may be added in the future.

Note that synchronize_irq() is used to ensure any running slave interrupt
is finished to make sure slave i2c_client structure can be safely used
by i2c_slave_event.
Signed-off-by: NKrzysztof Adamski <krzysztof.adamski@nokia.com>
Reviewed-by: NAlexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Since the 2019 a1k.org community re-print of these PCBs sports an
LTC2990 hwmon chip as an example use case, let this driver autoprobe
for that as well. If it is present, modprobing ltc2990 is sufficient.

The property_entry enables the three additional inputs available on
this particular board:

  in1 will be the voltage of the 5V rail, divided by 2.
  in2 will be the voltage of the 12V rail, divided by 4.
  temp3 will be measured using a PCB loop next the chip.
Signed-off-by: NMax Staudt <max@enpas.org>
Reviewed-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This is the i2c-icy driver for the ICY board for Amiga computers.
It connects a PCF8584 I2C controller to the Zorro bus, providing I2C
connectivity. The original documentation can be found on Aminet:

https://aminet.net/package/docs/hard/icy

IRQ support is currently not implemented, as i2c-algo-pcf is built for
the ISA bus and a straight implementation of the same stack locks up a
Zorro machine.
Signed-off-by: NMax Staudt <max@enpas.org>
Reviewed-by: NGeert Uytterhoeven <geert@linux-m68k.org>
[wsa: added a missing newline reported by checkpatch]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

There are three families of IOP machines we support in Linux: iop32x
(which includes EP80219), iop33x and iop13xx (aka IOP34x aka WP8134x).

All products we support in the kernel are based on the first of these,
iop32x, the other families only ever supported the Intel reference
boards but no actual machine anyone could ever buy.

While one could clearly make them all three work in a single kernel
with some work, this takes the easy way out, removing the later two
platforms entirely, under the assumption that there are no remaining
users.

Earlier versions of OpenWRT and Debian both had support for iop32x
but not the others, and they both dropped iop32x as well in their 2015
releases.

Link: https://lore.kernel.org/r/20190809163334.489360-1-arnd@arndb.deSigned-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for I2C parts
Acked-by: NDan Williams <dan.j.williams@intel.com>
Acked-by: NMartin Michlmayr <tbm@cyrius.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Now there is no need to keep our I2C driver to be initialized so early,
thus changing to module level and let it can be built as a module,
meanwhile adding some module information.
Signed-off-by: NBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Convert each file at I2C subsystem, renaming them to .rst and
adding to the driver-api book.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: NWolfram Sang <wsa@the-dreams.de>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Add SMBUS PCI ID for Intel Tiger Lake -LP.
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>

This patch adds a driver for the I2C controller found on the MediaTek
MT7621/7628/7688 SoC's. The base version of this driver was done by
Steven Liu (according to the copyright and MODULE_AUTHOR lines). It
can be found in the OpenWRT repositories (v4.14 at the time I looked).

The base driver had many issues, which are disccussed here:

https://en.forum.labs.mediatek.com/t/openwrt-15-05-loads-non-working-i2c-kernel-module-for-mt7688/1286/3

>From this link an enhanced driver version (complete rewrite, mayor
changes: support clock stretching, repeated start, ACK handling and
unlimited message length) from Jan Breuer can be found here:

https://gist.github.com/j123b567/9b555b635c2b4069d716b24198546954

This patch now adds this enhanced I2C driver to mainline.

Changes by Stefan Roese for upstreaming:
- Add devicetree bindings
- checkpatch clean
- Use module_platform_driver()
- Minor cosmetic enhancements
- Removed IO warpped functions
- Use readl_relaxed_poll_timeout() and drop poll_down_timeout()
- Removed superfluous barrier() in mtk_i2c_reset()
- Use i2c_8bit_addr_from_msg()
- Added I2C_FUNC_PROTOCOL_MANGLING
- Removed adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
Signed-off-by: NStefan Roese <sr@denx.de>
Tested-by: NRené van Dorst <opensource@vdorst.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add PCI ID for Intel Elkhart Lake PCH.
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>

Depending on MACH_JZ4780 prevent us from creating a generic kernel that
works on more than one MIPS board. Instead, we just depend on MIPS being
set.
Signed-off-by: NPaul Cercueil <paul@crapouillou.net>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

ARCH_BRCMSTB platforms have the BCM2835 I2C controllers, allow
selecting the i2c-bcm2835 driver on such platforms.
Signed-off-by: NKamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The Hygon Dhyana CPU has the SMBus device with PCI device ID 0x790b,
which is the same as AMD CZ SMBus device. So add Hygon Dhyana support
to the i2c-piix4 driver by using the code path of AMD.
Signed-off-by: NPu Wen <puwen@hygon.cn>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add slave mode support to the iProc I2C driver.
Signed-off-by: NRayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Signed-off-by: NMichael Cheng <ccheng@broadcom.com>
Signed-off-by: NShreesha Rajashekar <shreesha.rajashekar@broadcom.com>
Signed-off-by: NRay Jui <ray.jui@broadcom.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

MP2 controllers have two separate busses, so may accommodate up to two I2C
adapters. Those adapters are listed in the ACPI namespace with the
"AMDI0011" HID, and probed by a platform driver.

Communication with the MP2 takes place through MMIO registers, or through
DMA for more than 32 bytes transfers.

This is major rework of the patch submitted by Nehal-bakulchandra Shah from
AMD (https://patchwork.kernel.org/patch/10597369/).

Most of the event handling of v3 was rewritten to make it work with more
than one bus (e.g on Ryzen-based Lenovo Yoga 530), and this version
contains many other improvements.
Signed-off-by: NElie Morisse <syniurge@gmail.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Slave mode driver is based on the concept of i2c-designware driver.
Signed-off-by: NJuergen Fitschen <me@jue.yt>
[ludovic.desroches@microchip.com: rework Kconfig and replace IS_ENABLED
by defined]
Signed-off-by: NLudovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add PCI ID for Intel Comet Lake PCH.
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>

Latest NVIDIA GPU card has USB Type-C interface. There is a
Type-C controller which can be accessed over I2C.

This driver adds I2C bus driver to communicate with Type-C controller.
I2C client driver will be part of USB Type-C UCSI driver.
Signed-off-by: NAjay Gupta <ajayg@nvidia.com>
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
[wsa: kept Makefile sorting]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Allow I2C_OMAP to be built for K3 platforms.
Signed-off-by: NVignesh R <vigneshr@ti.com>
Reviewed-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

ARCH_BCM_63XX which is used by ARM-based DSL SoCs from Broadcom uses the
same controller, make it possible to select the STB driver and update
the Kconfig and help text a bit.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add Actions Semiconductor Owl family S900 I2C driver.
Signed-off-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: NPeter Rosin <peda@axentia.se>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This bus driver supports the GENI based i2c hardware controller in the
Qualcomm SOCs. The Qualcomm Generic Interface (GENI) is a programmable
module supporting a wide range of serial interfaces including I2C. The
driver supports FIFO mode and DMA mode of transfer and switches modes
dynamically depending on the size of the transfer.
Signed-off-by: NKarthikeyan Ramasubramanian <kramasub@codeaurora.org>
Signed-off-by: NSagar Dharia <sdharia@codeaurora.org>
Signed-off-by: NGirish Mahadevan <girishm@codeaurora.org>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Reviewed-by: NStephen Boyd <swboyd@chromium.org>
Tested-by: NStephen Boyd <swboyd@chromium.org>
[wsa: squashed the MAINTAINER addition and a RPM fix by Evan Green]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>