blob: f3d40f889c82c2fe9d8161c74cf0e2a982dbc246 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2014 Google Inc.
*/
Device (ALS)
{
Name (_HID, "ACPI0008")
Name (_UID, 1)
Method (_STA, 0, NotSerialized)
{
Return (0xF)
}
/*
* Returns the current ambient light illuminance reading in lux
*
* 0: Reading is below the range of sensitivity of the sensor
* -1: Reading is above the range or sensitivity of the sensor
*/
Method (_ALI, 0, NotSerialized)
{
Return (^^ALS0)
}
/*
* Returns a recommended polling frequency in tenths of seconds
*
* 0: No need to poll, async notifications will indicate changes
*/
Name (_ALP, 10)
/*
* Returns a package of packages where each tuple consists of a pair
* of integers mapping ambient light illuminance to display brightness.
*
* {<display luminance adjustment>, <ambient light illuminance>}
*
* Ambient light illuminance values are specified in lux.
*
* Display luminance adjustment values are relative percentages where
* 100 is no (0%) display brightness adjustment. Values <100 indicate
* negative adjustment (dimming) and values >100 indicate positive
* adjustment (brightening).
*
* This is currently unused by the Linux kernel ACPI ALS driver but
* is required by the ACPI specification so just define a basic two
* point response curve.
*/
Name (_ALR, Package ()
{
Package () { 70, 30 }, // Min { -30% adjust at 30 lux }
Package () { 150, 1000 } // Max { +50% adjust at 1000 lux }
})
}
|