Not every arch has io memory.
So, unbreak the build by fixing the dependencies.
Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Ran into this on UML:

drivers/built-in.o: In function `vf610_adc_probe':
drivers/iio/adc/vf610_adc.c:744: undefined reference to `devm_ioremap_resource'

devm_ioremap_resource() is defined only when HAS_IOMEM is selected.
Signed-off-by: NVegard Nossum <vegard.nossum@oracle.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Freescale i.MX7D soc contains a new ADC IP. This patch add this ADC
driver support, and the driver only support ADC software trigger.
Signed-off-by: NHaibo Chen <haibo.chen@freescale.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

in SOFTWARE buffer mode, a kthread will capture the active scan_elements
into a kfifo, then compute the remaining time until the next capture tick
and do an active wait (udelay).

This will produce a stream of up to fours channels plus a 64bits
timestamps (ns).

Tested with ina226, on BeagleBoneBlack.

Datasheet: http://www.ti.com/lit/gpn/ina226Signed-off-by: NMarc Titinger <mtitinger@baylibre.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NOliver Stäbler <oliver.staebler@bytesatwork.ch>
Reviewed-by: NMartin Kepplinger <martink@posteo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds support for the Texas Intruments ADS8688 ADC.
Signed-off-by: NSean Nyekjaer <sean.nyekjaer@prevas.dk>
Reviewed-by: NMartin Hundebøll <martin.hundeboll@prevas.dk>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This driver code was found as:

https://android.googlesource.com/kernel/tegra/+/aaabb2e045f31e5a970109ffdaae900dd403d17e/drivers/staging/iio/adc

Fixed various compilation issues and test this driver on omap5 evm.
Signed-off-by: NPradeep Goudagunta <pgoudagunta@nvidia.com>
Signed-off-by: NH. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: NMarek Belisko <marek@goldelico.com>
Acked-by: NLaxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: NJonathan Cameron <jic23@kernel.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add Holt threshold detector driver for HI-8435 chip
Signed-off-by: NVladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds support for IIO buffer to the Vybrid ADC driver.
IIO triggered buffer infrastructure along with iio sysfs trigger
is used to leverage continuous sampling support provided by the
ADC block.
Signed-off-by: NSanchayan Maity <maitysanchayan@gmail.com>
Acked-by: NFugang Duan <B38611@freescale.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Move the entry for the CC 10001 ADC driver in Kconfig and Makefile up to
maintain alphabetic order.
Signed-off-by: NHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This adds support for Microchip's 13 bit 1 channel AD converter MCP3301
Signed-off-by: NAndrea Galbusera <gizero@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The Cosmic Circuits 10001 ADC driver depends on HAS_IOMEM, HAVE_CLK and
REGULATOR together, not just any of these.
Signed-off-by: NHartmut Knaack <knaack.h@gmx.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Rework the help text of several ADCs to make sure that:
  - the module name is mentioned, if the driver can be built as a module
  - "If unsure, say N" messages are dropped
  - right indentation is maintained
Signed-off-by: NHartmut Knaack <knaack.h@gmx.de>
Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The Cosmic Circuits 10001 ADC driver depends on HAS_IOMEM, HAVE_CLK and
REGULATOR together, not just any of these.
Signed-off-by: NHartmut Knaack <knaack.h@gmx.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NUrs Fässler <urs.fassler@bytesatwork.ch>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds the support of the Berlin ADC, available on Berlin SoCs.
This ADC has 8 channels available, with one connected to a temperature
sensor.

The particularity here, is that the temperature sensor connected to the
ADC has its own registers, and both the ADC and the temperature sensor
must be configured when using it.
Signed-off-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Fixes:
drivers/built-in.o: In function `cc10001_adc_probe':
cc10001_adc.c:(.text+0x412e92): undefined reference to `devm_ioremap_resource'
Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Bring the Kconfig entry up to date with parts supported by
the driver.
Signed-off-by: NSoeren Andersen <san@rosetechnology.dk>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds support for DA9150 Charger & Fuel-Gauge IC GPADC.
Signed-off-by: NAdam Thomson <Adam.Thomson.Opensource@diasemi.com>
Reviewed-by: NHartmut Knaack <knaack.h@gmx.de>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NSebastian Reichel <sre@kernel.org>

This commit adds support for Cosmic Circuits 10001 10-bit ADC device.
Reviewed-by: NAndrew Bresticker <abrestic@chromium.org>
Signed-off-by: NPhani Movva <Phani.Movva@imgtec.com>
Signed-off-by: NNaidu Tellapati <Naidu.Tellapati@imgtec.com>
[ezequiel: code style cleaning]
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The voltage ADC is peripheral of Qualcomm SPMI PMIC chips. It has
15bits resolution and register space inside PMIC accessible across
SPMI bus.

The vadc driver registers itself through IIO interface.
Signed-off-by: NStanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The current ADC is peripheral of Qualcomm SPMI PMIC chips. It has
16 bits resolution and register space inside PMIC accessible across
SPMI bus.

The driver registers itself through IIO interface.
Signed-off-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Platform driver for X-Powers AXP288 ADC, which is a sub-device of the
customized AXP288 PMIC for Intel Baytrail-CR platforms. GPADC device
enumerates as one of the MFD cell devices. It uses IIO infrastructure
to communicate with userspace and consumer drivers.

Usages of ADC channels include battery charging and thermal sensors.

Based on initial work by:
Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NJacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

This patch add support for s3c2410/s3c2416/s3c2440/s3c2443 ADC. The s3c24xx
is alomost same as ADCv1. But, There are a little difference as following:
- ADCMUX register address
- ADCDAT mask (10 bit or 12 bit ADC resolution according to SoC version)
- s3c24xx/s3c64xx has not included ADC_PHY enable register
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The ADC is a 3-channel signal-ended 10-bit Successive Approximation
Register (SAR) A/D Converter. It uses the supply and ground as its reference
and converts the analog input signal into 10-bit binary digital codes.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Reviewed-by: NHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds support for ADC128S052 from TI.
Signed-off-by: NAngelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The ad7291 driver is in a reasonable shape. It does not use non-standard API/ABI
and there are no major style issues with the driver. So this patch moves it out
of staging.

There is one small warning from checkpatch which is also fixed in this patch.
The patch also sorts the #include directives in alphabetical order.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This driver add partial support of the
maxim 1027/1029/1031. Differential mode is not
supported.

It was tested on armadeus apf27 board.
Signed-off-by: NPhilippe Reynes <tremyfr@yahoo.fr>
Reviewed-by: NHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Building the at91 adc driver with CONFIG_INPUT disabled results in this
build error:

ERROR: "input_event" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_unregister_device" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_free_device" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_register_device" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_set_abs_params" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_allocate_device" [drivers/iio/adc/at91_adc.ko] undefined!

To make sure we can build random configurations, this adds a Kconfig
dependency on CONFIG_INPUT, as we do for other similar drivers.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: linux-iio@vger.kernel.org
Cc: Josh Wu <josh.wu@atmel.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The whole IIO subsystem can be built as modules.  If you make it a
module then stuff marked as "Y" in the adc directory simply won't be
linked in properly.

The two configs that were wrong were EXYNOS_ADC and LP8788_ADC.  I
know for a fact that EXYNOS_ADC will work as a module. I assume
LP8788_ADC will also be fine.
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

EXYNOS_ADC shouldn't only depend on OF. It is useless on architectures
other than Exynos so it should depend on ARCH_EXYNOS (which implies
OF.)
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This is a driver for an A/D converter, which belongs into
drivers/iio/adc.
Signed-off-by: NSebastian Reichel <sre@debian.org>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

This patch extends previous mcp3422 driver to support
missing members of the family, mcp3426/7/8.
Signed-off-by: NAngelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The driver is now at a reasonable quality level. Move it out of staging.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Acked-by: NHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The Xilinx XADC is a ADC that can be found in the series 7 FPGAs from Xilinx.
The XADC has a DRP interface for communication. Currently two different
frontends for the DRP interface exist. One that is only available on the ZYNQ
family as a hardmacro in the SoC portion of the ZYNQ. The other one is available
on all series 7 platforms and is a softmacro with a AXI interface. This driver
supports both interfaces and internally has a small abstraction layer that hides
the specifics of these interfaces from the main driver logic.

The ADC has a couple of internal channels which are used for voltage and
temperature monitoring of the FPGA as well as one primary and up to 16 channels
auxiliary channels for measuring external voltages. The external auxiliary
channels can either be directly connected each to one physical pin on the FPGA
or they can make use of an external multiplexer which is responsible for
multiplexing the external signals onto one pair of physical pins.

The voltage and temperature monitoring channels also have an event capability
which allows to generate a interrupt when their value falls below or raises
above a set threshold.

Buffered sampling mode is supported by the driver, but only for AXI-XADC since
the ZYNQ XADC interface does not have capabilities for supporting buffer mode
(no end-of-conversion interrupt). If buffered mode is supported the driver will
register two triggers. One "xadc-samplerate" trigger which will generate samples
with the configured samplerate. And one "xadc-convst" trigger which will
generate one sample each time the CONVST (conversion start) signal is asserted.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add support for MEN 16z188 ADC IP Core on MCB FPGAs.
Signed-off-by: NJohannes Thumshirn <johannes.thumshirn@men.de>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add Freescale Vybrid vf610 adc driver. The driver only support
ADC software trigger.

VF610 ADC device documentation is available at below reference manual
(chapter 37):
http://cache.freescale.com/files/32bit/doc/ref_manual/VYBRIDRM.pdf?
fpsp=1&WT_TYPE=Reference%20Manuals&WT_VENDOR=FREESCALE&WT_FILE_FORMAT
=pdf&WT_ASSET=Documentation

CC: Shawn Guo <shawn.guo@linaro.org>
CC: Jonathan Cameron <jic23@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Otavio Salvador <otavio@ossystems.com.br>
CC: Peter Meerwald <pmeerw@pmeerw.net>
CC: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NFugang Duan <B38611@freescale.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This avoids build problems such iio_push_to_buffers* not being defined.
Signed-off-by: NJonathan Cameron <jic23@kernel.org>
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>

Previously the driver had only one-shot reading functionality.
This patch adds continuous sampling support to the driver.

Continuous sampling starts when buffer is enabled.
HW IRQ wakes worker thread that pushes samples to userspace.
Sampling stops when buffer is disabled by userspace.

Patil Rachna (TI) laid the ground work for ADC HW register access.
Russ Dill (TI) fixed bugs in the driver relevant to FIFOs and IRQs.

I fixed channel scanning so multiple ADC channels can be read
simultaneously and pushed to userspace.
Restructured the driver to fit IIO ABI.
And added INDIO_BUFFER_HARDWARE mode.
Signed-off-by: NZubair Lutfullah <zubair.lutfullah@gmail.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NRuss Dill <Russ.Dill@ti.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Sysfs access to all channels.
Signed-off-by: NAngelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>