samsung-laptop is not at all related to ACPI, but since this interface
is not documented at all, and the driver has to use it at load to
understand how it works on the laptop, I think it's a good idea to
disable it if a better solution is available.
Signed-off-by: NCorentin Chary <corentincj@iksaif.net>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

Create _init()/_exit() function for each subsystem, remove
the local struct samsung_laptop * and only keep a
struct platform_device * that can only be used in samsung_init()
and samsung_exit().
Signed-off-by: NCorentin Chary <corentincj@iksaif.net>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

Even if this driver can only be loaded once, it is still a good
idea to create some kind of context structure.
Signed-off-by: NCorentin Chary <corentincj@iksaif.net>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

module_param(bool) used to counter-intuitively take an int.  In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.

It's time to remove the int/unsigned int option.  For this version
it'll simply give a warning, but it'll break next kernel version.
Acked-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>

my samsung laptop would be very happy if you add
these lines to the file drivers/platform/x86/samsung-laptop.c

Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

My DMI model is this:
>dmesg |grep DMI
[    0.000000] DMI present.
[    0.000000] DMI: SAMSUNG ELECTRONICS CO., LTD. SR700/SR700, BIOS
04SR 02/20/2008

adding dmi information of Samsung R700 laptops
This adds the dmi information of Samsungs R700 laptops.
Signed-off-by: NStefan Beller <stefanbeller@googlemail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

This patch depends on the "Platform: Brightness quirk for samsung
laptop driver" patch from Jason Stubbs. This patch adds a check for an
initial brightness level of 0; if the level is 0, this patch changes
the brightness level to 1 before the driver attempts to detect the
brightness quirk.

The Samsung N150 netbook experiences the brightness quirk. Without
Jason's patch, the only brightness levels available on the N150 are 0,
1, and 8. This patch ensures that, when the initial brightness level
is 0, the samsang-laptop driver detects the brightness quirk on the
N150, thereby making brightness levels 0 through 8 available.
Signed-off-by: NJohn Serock <john.serock@gmail.com>
Acked-by: NJason Stubbs <jasonbstubbs@gmail.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

This is a follow-up for commit 78a7539b, which didn't cover the
Samsung N220 laptop. With this backlight brightness works nicely
on the N220 netbook.
Signed-off-by: NRaul Gutierrez Segales <rgs@collabora.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

This patch just adds the DMI info for the samsung laptop driver to work with
the NC210/NC110. It needs the brightness quirk patch for proper support.
Signed-off-by: NJason Stubbs <jasonbstubbs@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

On some Samsung laptops the brightness regulation works slightly different.
All SABI commands except for set_brightness work as expected. The behaviour
of set_brightness is as follows:

- Setting a new brightness will only step one level toward the new brightness
  level. For example, setting a level of 5 when the current level is 2 will
  result in a brightness level of 3.
- A spurious KEY_BRIGHTNESS_UP or KEY_BRIGHTNESS_DOWN event is also generated
  along with the change in brightness.
- Neither of the above two issues occur when changing from/to brightness
  level 0.

This patch adds detection and a non-intrusive workaround for the above issues.
Signed-off-by: NJason Stubbs <jasonbstubbs@gmail.com>
Tested-by: NDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

samsung_init() should not return success if not all devices are initialized.
Otherwise, samsung_exit() will dereference sdev NULL pointers and others.
Signed-off-by: NDavid Herrmann <dh.herrmann@googlemail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

The min_brightness value of the sabi_config is incorrectly used in brightness
calculations. For the config where min_brightness = 1 and max_brightness = 8,
the user visible range should be 0 to 7 with hardware being set in the range
of 1 to 8. What is actually happening is that the user visible range is 0 to
8 with hardware being set in the range of -1 to 7.

This patch fixes the above issue as well as a miscalculation that would occur
in the case of min_brightness > 1.
Signed-off-by: NJason Stubbs <jasonbstubbs@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

patch works for me, but I need to add "acpi_backlight=vendor" to kernel
params
Signed-off-by: NSmelov Andrey <xor29a@bk.ru>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

Some samsung latop of the N150/N2{10,20,30} serie are badly detected by the samsung-laptop platform driver, see bug # 36082.
It appears that N230 identifies itself as N150/N210/N220/N230 whereas the other identify themselves as N150/N210/220.
This patch attemtp fix #36082 allowing correct identification for all the said netbook model.
Reported-by: NDaniel Eklöf <daniel@ekloef.se>
Signed-off-by: NThomas Courbon <thcourbon@gmail.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

The N510 benefits from this code as well. Below is a patch to include support.
Signed-off-by: NJouke Witteveen <j.witteveen@gmail.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

Cherry-picked from drivers/staging/samsung-laptop/samsung-laptop.c
Signed-off-by: NMichal Marek <mmarek@suse.cz>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

Here's a trivial patch which adds support to the backlight device found
in Samsung R410 Plus laptops.
Signed-off-by: NAlberto Mardegan <mardy@users.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
[mmarek: cherry-picked from staging commit d542f180]
Signed-off-by: NMichal Marek <mmarek@suse.cz>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
[mmarek: cherry-picked from staging commit 0789b003]
Signed-off-by: NMichal Marek <mmarek@suse.cz>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

dmi_check_system() walks the table running matching functions until
someone returns non zero or we hit the end.

This patch makes dmi_check_cb to return 1 so dmi_check_system() return
immediately when a match is found.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

This adds the samsung-laptop driver to the kernel.  It now supports
all known Samsung laptops that use the SABI interface.
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>

There may be multiple ways of controlling the backlight on a given
machine.  Allow drivers to expose the type of interface they are
providing, making it possible for userspace to make appropriate policy
decisions.
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Here's a trivial patch which adds support to the backlight device found
in Samsung R410 Plus laptops.
Signed-off-by: NAlberto Mardegan <mardy@users.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The patch is against the 2.6.37 drivers/staging/samsung-laptop
driver and implements some extra enhancements.

It fixes an issue that the brightness would not change the level at
once as well as and some other oddities. It was resolved by
reallocated the SABI memory reagion using the "nocache" option.

The patch also introduces a new set of supported netbook models,
especially the NC10plus which was used for testing this patch. This new
set of models also offer 9 instead of just 8 brightness levels so it
also introduces an additional parameter for the models struct so that
models can define their own brightness range.
Signed-off-by: NNils Faerber <nils.faerber@kernelconcepts.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Signed-off-by: NRiccardo Magliocchetti <riccardo.magliocchetti@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Change sabi_config to const.
Reduces data, increases text ~200 bytes.

$ size drivers/platform/x86/samsung-laptop.o*
   text	   data	    bss	    dec	    hex	filename
   6933	   5084	   1560	  13577	   3509	drivers/platform/x86/samsung-laptop.o.new
   6765	   5252	   1560	  13577	   3509	drivers/platform/x86/samsung-laptop.o.old
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Fixed up the printk stuff to use pr_XXX where applicable, and reversed
the logic when testing for commands to complete properly.
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

When doing the conversion to the "support more than one model" the
header address of the N128 was incorrectly copied.

This fixes the driver to work properly now on this laptop model.

Cc: Ingmar Steen <iksteen@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Add Samsung NP-X120/X170 laptop DMI signature to samsung-laptop DMI table.
Signed-off-by: NRoman Grebennikov <grebennikov.roman@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Reported-by: NPiotr Mitas <yabolus@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Reported-by: NEvgeny Bobkin <stwooe@mail.tu-berlin.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Add DMI data for Samsung N145P/N250P/N260P
Signed-off-by: NRichard Schütz <r.schtz@t-online.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Taken from the fork of the driver at:
	http://code.google.com/p/easy-slow-down-manager/
which should no longer be needed now that the in-kernel driver now
supports these laptops.

Cc: Kobelkov Sergey <sergeyko81@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Support for the Samsung NP-Q45 from Jérémie Huchet added
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Info was provided by Soeren Sonnenburg <bugreports@nn7.de>

Cc: Soeren Sonnenburg <bugreports@nn7.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

No camelcase in the Linux kernel please.

Cc: Ingmar Steen <iksteen@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Cc: Ingmar Steen <iksteen@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This makes the coding style checker a lot happier.

Cc: Ingmar Steen <iksteen@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

These were introduced with the patch, "staging: samsung-laptop: Extend
samsung-laptop platform driver to support another flavor of its platform
BIOS."

Cc: Ingmar Steen <iksteen@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

These were introduced with the patch, "staging: samsung-laptop: Extend
samsung-laptop platform driver to support another flavor of its platform
BIOS."

Cc: Ingmar Steen <iksteen@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>