This patch adds a common callback for gpio_to_irq() for external and
gpio interrupts for Samsung SoCs.
Signed-off-by: NJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
[kgene.kim@samsung.com: moved samsung_gpiolib_to_irq() for s3c24xx build]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Add locking to each GPIO bank to allow for SMP capable code
to use the gpiolib functions. See the gpio-core.h header file
for more information.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Rename mach-s3c2410/include/mach/gpio-core.h to mach/gpio-track.h so that
it can be included by <plat/gpio-core.h> when needed.

Eliminate all other empty gpio-core.h files and just include the
<plat/gpio-core.h> as necessary.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move the gpio.c code containing the core gpiolib and GPIO support to
plat-samsung from plat-s3c as it is used by all current Samsung SoCs.

Note, we didn't move this to gpiolib.c as it contains code that is not
strictly for gpiolib support and the 4bit code is already called gpiolib.c
so make the change easier by not renaming both files in one go.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

The check of the s3c_gpios[] index had an off-by-one.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Acked-by: NBen Dooks <ben-linux@fluff.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Move the GPIO suspend/resume support inline with the gpiolib support
so that it will work with both the S3C24XX and S3C64XX series.

The s3c_gpio_chip is extended to have a pm callback and a save block
to keep the state of the GPIO over suspend, and the code from the
s3c24xx implementation is added to a new common file.

The suspend process now uses the list of registered chips to go through
saving and restoring each one as appropriate, using the pm callback to
select the appropriate routine depending on the type of control register
present.

This change also means that any additional GPIO added should not require
changes to the PM.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

The gpiolib driver keeps its chip array to itself
and having a separate array for s3c-only gpios stops
any non-s3c gpio being used in one of the s3c specific
configuration calls.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move the common parts of the GPIO code into plat-s3c
for use with both the s3c24xx and s3c64xx systems.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>