iio: acpi: Add support for ACPI0008 Ambient Light Sensor
authorGabriele Mazzotta <gabriele.mzt@gmail.com>
Sat, 2 May 2015 12:30:57 +0000 (14:30 +0200)
committerJonathan Cameron <jic23@kernel.org>
Sun, 10 May 2015 19:31:48 +0000 (20:31 +0100)
commitfeca56ff400b7b166c86af9ff5c131d1d33cf615
tree816828eaebcdab83edca6ad1e28d6d22b2920995
parentee1a81f90f28a5a2c3339ec62b2a6a6d165075d2
iio: acpi: Add support for ACPI0008 Ambient Light Sensor

This driver adds the initial support for the ACPI Ambient Light Sensor
as defined in Section 9.2 of the ACPI specification (Revision 5.0) [1].

Sensors complying with the standard are exposed as ACPI devices with
ACPI0008 as hardware ID and provide standard methods by which the OS
can query properties of the ambient light environment the system is
currently operating in.

This driver currently allows only to get the current ambient light
illuminance reading through the _ALI method, but is ready to be
extended extended to handle _ALC, _ALT and _ALP as well.

[1] http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf

Signed-off-by: Martin Liska <marxin.liska@gmail.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
drivers/iio/light/Kconfig
drivers/iio/light/Makefile
drivers/iio/light/acpi-als.c [new file with mode: 0644]