According to gpio-samsung.c, this patch updates the name of
regarding Samsung GPIO. Basically the samsung_xxx prefix is
used in gpio-samsung.c instead of s3c_xxx, because unified
name can reduce its complexity.

Note: some s3c_xxx stil remains because it is used widely.
It will be updated next time.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>

This patch removes all global data from common s5p gpio interrupt
handler code. This enables to reuse this code on EXYNOS4 platform.
Instead of global data (IRQ_GPIOINT interrupt number,
S5P_GPIOINT_GROUP_MAXNR groups count), a s5p_register_gpioint_bank()
function is introduced. It is aimed to be called from gpiolib init.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

A number of the SDHCI code configure a GPIO to a special function
and remove any pull-up, so add s3c_gpio_cfgrange_nopull() as a
wrapper to the s3c_gpio_cfgall_range() to make the code that
calls it fit on one line.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Add a function to configure a range of GPIOs function and
pull in one go, mainly for the SDHCI and framebuffer helpers
which tend to do this.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
[kgene.kim@samsung.com: Fix small comments]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Add s3c_gpio_cfgpin_range() to configure a range of pins to the given
value. This is useful for a number of blocks where the pins are in order
and saves multiple calls to s3c_gpio_cfgpin().
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch adds common code to enable support of GPIO interrupt on
S5P SoCs.

The total number of GPIO pins is quite large on S5P SoCs. Registering
irq support for all of them would be a resource waste. Because of that
the interrupt support for standard GPIO pins is registered dynamically
by the s5p_register_gpio_interrupt() function.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: minor title fixes]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch fixes on defined drive strength value for GPIO.
According to data sheet, if we want drive strength 1x, the value
should be 00(b), if 2x should be 10(b), if 3x should be 01(b),
and if 4x should be 11(b). Also fixes comment(from S5C to S5P).
Reported-by: NJanghyuck Kim <janghyuck.kim@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Update the documentation on the gpio configuration calls to add more
references to useful information and also to document the values that
are passed.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Fix typo in s3c_gpio_cfgpin() documentation, the second argument is @to
not @pin again.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Driver strength parameter can be changed not only on S5PC100 but also
on S5PV210/S5PC110 platforms, so move the helper functions to the common
plat-samsung directory.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add s3c_gpio_getcfg() and change anything using s3c2410_gpio_getcfg() to
use this instead.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Move the GPIO and GPIO configuration headers into arch/arm/plat-samsung
as they are common to all the Samsung SoCs.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add new GPIO configuration calls that mesh with the
new gpiolib support.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>