[coreboot-gerrit] Patch merged into coreboot/master: 612163eb chrome ec: Add ACPI Device for ALS if enabled

the following patch was just integrated into master:
commit 612163ebaae60b0bc724324abb882f995072b104
Author: Duncan Laurie 
Date:   Fri Jun 13 10:35:22 2014 -0700

chrome ec: Add ACPI Device for ALS if enabled

The EC can export ALS information if the sensor is attached
    to it directly rather than to the host.  This adds a basic
    ACPI ALS device and implements the required information.

The kernel does not use the _ALR tuple set but it is required
    by the ACPI spec so this just adds the sample two point
    response curve defined in ACPI 5.0 section 9.2.5.

The EC does not currently send events for lux value changes so
    a polling interval of 1 second is defined.

BUG=chrome-os-partner:24208
    BRANCH=None
    TEST=build and boot on samus, add acpi-als driver to the kernel
    and read /sys/bus/iio/devices/iio:device0/in_illuminance_raw

Original-Change-Id: Id29b72a68aa21c1a7c71d5f87223ac010cef0377
    Original-Signed-off-by: Duncan Laurie 
    Original-Reviewed-on: https://chromium-review.googlesource.com/203743
    Original-Reviewed-by: Aaron Durbin 
    (cherry picked from commit 81f44b33b87a6ee3079b8ef6efffacd0eeb0283f)
    Signed-off-by: Marc Jones

Change-Id: I5a0ccd30e8b453675beaf7d0363dbfa162bd5b3f
    Reviewed-on: http://review.coreboot.org/8132
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/8132 for details.

-gerrit