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asus-wmi: provide access to ALS control

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[ Upstream commit aca234f6378864d85514be558746c0ea6eabfa8e ]

Asus Zenbook ux31a is providing ACPI0008 interface for ALS
(Ambient Light Sensor), which is accessible for OS => Win 7.
This sensor can be used with iio/acpi-als driver.
Since it is disabled by default, we should use asus-wmi
interface to enable it.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Oleksij Rempel 2016-04-01 13:35:21 +02:00 • committed by Greg Kroah-Hartman
parent 0e0280b077
commit 32101be323
1 changed files with 5 additions and 0 deletions
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5
drivers/platform/x86/asus-wmi.c
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@ -117,6 +117,7 @@ MODULE_LICENSE("GPL");
#define ASUS_WMI_DEVID_LED6 0x00020016
/* Backlight and Brightness */
#define ASUS_WMI_DEVID_ALS_ENABLE 0x00050001 /* Ambient Light Sensor */
#define ASUS_WMI_DEVID_BACKLIGHT 0x00050011
#define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
#define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021
@ -1759,6 +1760,7 @@ ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
ASUS_WMI_CREATE_DEVICE_ATTR(als_enable, 0644, ASUS_WMI_DEVID_ALS_ENABLE);
static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
@ -1785,6 +1787,7 @@ static struct attribute *platform_attributes[] = {
&dev_attr_cardr.attr,
&dev_attr_touchpad.attr,
&dev_attr_lid_resume.attr,
&dev_attr_als_enable.attr,
NULL
};
@ -1805,6 +1808,8 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
devid = ASUS_WMI_DEVID_TOUCHPAD;
else if (attr == &dev_attr_lid_resume.attr)
devid = ASUS_WMI_DEVID_LID_RESUME;
else if (attr == &dev_attr_als_enable.attr)
devid = ASUS_WMI_DEVID_ALS_ENABLE;
if (devid != -1)
ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);