This adds support for the touchscreen on Samsung s3c64xx.
The driver is completely untested but shows roughly how
it could be done, following the example of the at91 driver.

compared to the old plat-samsung/adc driver, there is
no support for prioritizing ts over other clients, nor
for oversampling. From my reading of the code, the
priorities didn't actually have any effect at all, but
the oversampling might be needed.

Verifying this driver is the main issue that is currently
holding up multiplatform support for s3c64xx, so any help
in testing is very much appreciated.

The current version uses the IS_REACHABLE() that is
going to be introduced in the linux-media tree, please
comment this out for testing.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The ADC on exynos7 is quite similar to ADCv2. The differences are as
follows:
	- exynos7-adc has 8 input channels (as against 10 in ADCv2).
	- exynos7 does not include an ADC PHY control register.
	- Some ADC_CON2 register bits being used in ADCv2 are listed as
	  reserved in exynos7-adc. This results in a different init_hw
	  function for exynos7.
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Reviewed-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch updates the DT bindings for ADC in exynos-adc.txt with the
syscon phandle to the ADC nodes.
Signed-off-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
To: devicetree@vger.kernel.org
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.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 in s3c64xx is almost the same as exynosv1, but
has a different 'select' method. Adding this here will be
helpful to move over the existing s3c64xx platform from the
legacy plat-samsung/adc driver to the new exynos-adc.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch add DT binding documentation for Exynos3250 ADC IP. Exynos3250 has
special clock ('sclk_adc') for ADC which provide clock to internal ADC.
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Murata Manufacturing Co., Ltd is the vendor for
NTC (Negative Temperature coefficient) based Thermistors.
But, the driver extensively uses "NTC" as the vendor name.

This patch corrects the vendor name also updates the
compatibility strings according to the vendor-prefix.txt

Note: Drivers continue to support the previous compatible strings
but further addition of these compatible strings in device tree
is deprecated.
Signed-off-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

This patch fix typo of property name from 'pullup-uV' to 'pullup-uv'.
The ntc_thermistor.c use 'pullup-uv' when parsing dt data.
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

The exynos ADC won't work without a regulator called "vdd" and a clock
called "adc".  Document this fact in the device tree bindings.
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Reviewed-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Fixes some typos in the documentation of exynos-adc.txt.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Without this change the exynos adc controller needed to have its phy
enabled in some out-of-driver C code.  Add support for specifying the
phy enable register by listing it in the reg list.
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Tested-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds New driver to support:
1. Supports ADC IF found on EXYNOS4412/EXYNOS5250
   and future SoCs from Samsung
2. Add ADC driver under iio/adc framework
3. Also adds the Documentation for device tree bindings
Signed-off-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>