ACPI spec defines ACPI Ambient Light Sensor device (hid ACPI0008),
which provides a standard interface by which the OS may query properties
of the ambient light environment the system is currently operating in,
as well as the ability to detect meaningful changes in these values when
the environment changes.

This patch introduces the ACPI ALS device driver.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Documentation/ABI/testing/sysfs-class-als
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

_BQC on some laptops returns an uninitialized value when it's
invoked for the first time.

Set the laptop to the maximum backlight level in this case.
http://bugzilla.kernel.org/attachment.cgi?id=22675Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Only one ACPI video bus device for a VGA controller.

Some buggy BIOS exports multiple ACPI video bus devices for the same
VGA controller, and multiple backlight control methods as well.
This messes up the ACPI video backlight control.
http://bugzilla.kernel.org/show_bug.cgi?id=13577

With this patch applied, only the first ACPI video bus device
under a PCI device node is bind to ACPI video driver.

The questions is that, we never notice this kind of devices before,
thus I'm not sure this won't break any laptops.

I suggest we put this patch in ACPI test tree first.
Tested-by: Hector Martin <hector@marcansoft.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Conflicts:
	drivers/acpi/video.c
Signed-off-by: Len Brown <len.brown@intel.com>

Cdev name is normally used for ether class devices or character
devices so rename member to avoid confusion for casual reader
of the code.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Len Brown <len.brown@intel.com>

thermal_cooling_device_register() returns error encoded in a pointer
when it fails in which case we need to explictly set device->cdev
to NULL so we don't try to unregister it when unloading.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv3 Notebook PC")

http://bugzilla.kernel.org/show_bug.cgi?id=13745Signed-off-by: Len Brown <len.brown@intel.com>

Only one ACPI video bus device for a VGA controller.

Some buggy BIOS exports multiple ACPI video bus devices for the same
VGA controller, and multiple backlight control methods as well.
This messes up the ACPI video backlight control.
http://bugzilla.kernel.org/show_bug.cgi?id=13577

With this patch applied, only the first ACPI video bus device
under a PCI device node is bind to ACPI video driver.

The questions is that, we never notice this kind of devices before,
thus I'm not sure this won't break any laptops.

I suggest we put this patch in ACPI test tree first.
Tested-by: Hector Martin <hector@marcansoft.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Only one ACPI video bus device for a VGA controller.

Some buggy BIOS exports multiple ACPI video bus devices for the same
VGA controller, and multiple backlight control methods as well.
This messes up the ACPI video backlight control.
http://bugzilla.kernel.org/show_bug.cgi?id=13577

With this patch applied, only the first ACPI video bus device
under a PCI device node is bind to ACPI video driver.

The questions is that, we never notice this kind of devices before,
thus I'm not sure this won't break any laptops.

I suggest we put this patch in ACPI test tree first.
Tested-by: Hector Martin <hector@marcansoft.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Conflicts:
	drivers/acpi/ec.c
Signed-off-by: Len Brown <len.brown@intel.com>

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

In general, EC transaction should complete in less than 1ms, thus it is possible to merge wait for
1ms in poll mode and 1ms of interrupt transaction timeout.
Still, driver will wait 500ms for EC to complete transaction.

This significantly simplifies driver and makes it immune to problematic EC interrupt
implementations.

It also may lessen kernel start-up time by 500ms.

References: http://bugzilla.kernel.org/show_bug.cgi?id=12949Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

Acer Aspire 8930G laptops (and possibly others) report the battery current
as a 16-bit signed negative when it is charging.  It also reports it as
0x10000 when the current is 0.  This patch adds a quirk for this which
takes the absolute value of the reported current cast to an s16.  This is
a DSDT bug present in the latest BIOS revision (the EC register is 16 bits
signed and the DSDT attempts to take the 16-bit two's complement of this,
which works for discharge but not charge.  It also breaks zero values
because a 32-bit register is used and the high bits aren't thrown away).

I've enabled this for all Acer systems which report in mA units.  This
should be safe since it won't break compliant systems unless they report a
current above 32A, which is insane.  The patch also detects the valid
32-bit value -1, which indicates unknown status, and does not attempt the
fix in that case (note that this does not conflict with 16-bit -1, which
is 65535 as read normally and gets translated to 1mA).
Signed-off-by: Hector Martin <hector@marcansoft.com>
Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

_BQC doesn't return a value listed in _BCL method.
http://bugzilla.kernel.org/show_bug.cgi?id=13511

ingore the buggy _BQC method in this case
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Signed-off-by: Scott Howard <showard314@gmail.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

The 900A provides hotplug notifications on a different ACPI object to
other models.
Reported-by: Trevor <trevor.chart@gmail.com>
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>

rfkill_unregister() should always be followed by rfkill_destroy()
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>