ARM: SAMSUNG: Fix null pointer dereference in ADC driver

Use struct adc_device instead of relying on client (which could be
NULL) when checking for SoC type.
Signed-off-by: NMaurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add S3C64XX support to the generic Samsung ADC driver
Signed-off-by: NMaurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move S3C24XX ADC driver to plat-samsung
Signed-off-by: NMaurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

The function s3c_adc_remove is used only wrapped by __devexit_p so define
it using __devexit.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-By: NBen Dooks <ben@simtec.co.uk>
Cc: Ramax Lo <ramaxlo@gmail.com>
Cc: Nelson Castillo <arhuaco@freaks-unidos.net>
Cc: linux-kernel@vger.kernel.org
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Ryan Mallon <ryan@bluewatersys.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Fix the export of s3c_adc_read.
Signed-off-by: NRyan Mallon <ryan@bluewatersys.com>
[ben-linux@fluff.org: remove unexport of s3c_adc_start, needed for ts]
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

After m68k's task_thread_info() doesn't refer to current,
it's possible to remove sched.h from interrupt.h and not break m68k!
Many thanks to Heiko Carstens for allowing this.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>

To add HWMON support, we need a synchronous read() call that blocks
until completion. Add the client that is being service to the select
and convert callbacks to make the code easier.
Signed-off-by: NBen Dooks <ben@simtec.co.uk>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

convert callback

This patch allow us to efficiently modify the number of
remaining conversions from the client side. This us useful
when we do not know in advance how many conversions we will
need or when we need to cancel pending conversions.

This change is simple enough to be compatible with existing
code that can just define the new pointer in the callback
and ignore it.

Sample usage:

http://tinyurl.com/s3c2410-ts-c (function stylus_adc_action).
Signed-off-by: NNelson Castillo <arhuaco@freaks-unidos.net>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Check pending queue and remove the adc client being released.
Signed-off-by: NRamax Lo <ramaxlo@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

The symbol 's3c_adc_try' in arch/arm/plat-s3c24xx/adc.c
does not need to be exported and thus should be static.

This fixes the following sparse warning:

adc.c:103:6: warning: symbol 's3c_adc_try' was not declared. Should it be static?
Signed-off-by: NBen Dooks <ben@simtec.co.uk>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

A common core driver for the S3C24XX ADC block so that
the touchscreen, hwmon and any other drivers can share
the resource.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>