Use a PWM lookup table to provide the PWM to the pwm-backlight device.
The driver has a legacy code path that is required only because boards
still use the legacy method of requesting PWMs by global ID. Replacing
these usages allows that legacy fallback to be removed.
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

This patch moves backlight header file into mach-s3c64xx.
Because it is not used for others except mach-s3c64xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

This patch moves dev-backlight from plat-samsung into mach-s3c64xx
because it is used for only s3c64xx no other platforms.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

The pwm-backlight driver is moving to use the gpiod interface,
which has its own mapping mechanism for platform data GPIOs.
These mappings carry GPIO properties like active low so they don't have
to be explicitly handled by GPIO consumers.

Because of this change, the enable_gpio_flags member of
platform_pwm_backlight_data is going away. dev-backlight was passing
this member, but had no user making use of it, so it can safely be
removed. Further GPIOs used by pwm-backlight are expected to be
defined using the mechanisms provided by the gpiod API.
Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com>
Reviewed-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>

The GPIO API defines 0 as being a valid GPIO number, so this field needs
to be initialized explicitly.
Signed-off-by: NThierry Reding <treding@nvidia.com>

This patch modifies any board files using the legacy PWM device to use
the new device instead.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: NHeiko Stuebner <heiko@sntech.de>
Tested-by: NMark Brown <broonie@linaro.org>
Tested-by: NSylwester Nawrocki <sylvester.nawrocki@gmail.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>

This patch modifies dev-backlight helpers to get private data using
container_of instead of abusing platform_data field of PWM device.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: NHeiko Stuebner <heiko@sntech.de>
Tested-by: NMark Brown <broonie@linaro.org>
Tested-by: NSylwester Nawrocki <sylvester.nawrocki@gmail.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>

s3c_set_platdata() is defined with __init attribute, hence all functions
referencing this function should also be defined with __init attribute.

samsung_bl_set() is referenced only in '__init xxx_machine_init()' functions,
thus this change won't put any additional constraint on the usage of
samsung_bl_set().
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The callback 'notify_after' was added to struct platform_pwm_backlight_data
provided by PWM backlight driver. Therefore, this patch adds a callback
'notify_after' which can be called after pwm_enable, pwm_disable and
pwm_config.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch removes duplicated slab header for pwm backlight.
arch/arm/plat-samsung/dev-backlight.c: slab.h is included
more than once.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Fix following build error.
arch/arm/plat-samsung/dev-backlight.c: In function 'samsung_bl_set':
arch/arm/plat-samsung/dev-backlight.c:145: error: implicit declaration of function 'kfree'
Signed-off-by: NJonghwan Choi <jhbird.choi@gmail.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

To fix messages like this:

  CC      arch/arm/plat-samsung/platformdata.o
arch/arm/plat-samsung/platformdata.c: In function 's3c_set_platdata':
arch/arm/plat-samsung/platformdata.c:29: error: 'GFP_KERNEL' undeclared (first use in this function)
arch/arm/plat-samsung/platformdata.c:29: error: (Each undeclared identifier is reported only once
arch/arm/plat-samsung/platformdata.c:29: error: for each function it appears in.)
make[3]: *** [arch/arm/plat-samsung/platformdata.o] Error 1
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

This patch creates a common structure for LCD backlight
using PWM timer to be used by various Samsung boards.
Signed-off-by: NBanajit Goswami <banajit.g@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>