/* SPDX-License-Identifier: GPL-2.0-only */ 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 } }) }