Add base support for the 10-bit SAR ADC peripheral found
on NXP LPC18xx/43xx SoCs.

This is a minimal driver that does not support burst mode,
interrupts, DMA or hardware triggers.

User manual with register description can be found on:
LPC18xx: www.nxp.com/documents/user_manual/UM10430.pdf
LPC43xx: www.nxp.com/documents/user_manual/UM10503.pdf
Signed-off-by: NJoachim Eastwood <manabian@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The devres.o gets linked if HAS_IOMEM is present so on ARCH=um
allyesconfig (COMPILE_TEST) failed with:

drivers/built-in.o: In function `at91_adc_probe':
at91-sama5d2_adc.c:(.text+0x48f548): undefined reference to `devm_ioremap_resource'
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The driver has sysfs readings with runtime PM support for power saving.
It also offers buffer support that can be used together with IIO software
triggers.

Datasheet can be found here:
	http://www.ti.com.cn/cn/lit/ds/symlink/ads1015.pdfSigned-off-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This is a conversion queue driver for the mx25 SoC. It uses the central
ADC which is used by two seperate independent queues. This driver
prepares different conversion configurations for each possible input.
For a conversion it creates a conversionqueue of one item with the
correct configuration for the chosen channel. It then executes the queue
once and disables the conversion queue afterwards.

The reference voltages are configurable through devicetree subnodes,
depending on the connections of the ADC inputs.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: NDenis Carikli <denis@eukrea.com>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Move mxs-lradc driver from drivers/staging/iio/adc to drivers/iio/adc.
Signed-off-by: NKsenija Stanojevic <ksenija.stanojevic@gmail.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This adds ADC0831/ADC0832/ADC0834/ADC0838 8-bit ADC driver.
I have tested with ADC0831 and ADC0832.  The remaining ADC0834 and
ADC0838 are very similar to ADC0832.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

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>

Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This driver supports the new version of the Atmel ADC device introduced
with the SAMA5D2 SoC family.
Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Acked-by: NRob Herring <robh@kernel.org>
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>

The MCP3425 is a single channel up to 16-bit A/D converter which has
features:

- On-Board Programmable Gain Amplifier (PGA):
 - Gains of 1, 2, 4 or 8
- Programmable Data Rate Options:
 - 15 SPS (16 bits), 60 SPS (14 bits), 240 SPS (12 bits)

The mcp3422 driver also supports the MCP3421 which is a single channel.
So we can support MCP3425 with a little changes to mcp3422 driver.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Cc: linux-iio@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>