0001 What: /sys/devices/platform/samsung/performance_level
0002 Date: January 1, 2010
0003 KernelVersion: 2.6.33
0004 Contact: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
0005 Description: Some Samsung laptops have different "performance levels"
0006 that can be modified by a function key, and by this
0007 sysfs file. These values don't always make a whole lot
0008 of sense, but some users like to modify them to keep
0009 their fans quiet at all costs. Reading from this file
0010 will show the current performance level. Writing to the
0011 file can change this value.
0012
0013 Valid options:
0014 - "silent"
0015 - "normal"
0016 - "overclock"
0017
0018 Note that not all laptops support all of these options.
0019 Specifically, not all support the "overclock" option,
0020 and it's still unknown if this value even changes
0021 anything, other than making the user feel a bit better.
0022
0023 What: /sys/devices/platform/samsung/battery_life_extender
0024 Date: December 1, 2011
0025 KernelVersion: 3.3
0026 Contact: Corentin Chary <corentin.chary@gmail.com>
0027 Description: Max battery charge level can be modified, battery cycle
0028 life can be extended by reducing the max battery charge
0029 level.
0030
0031 - 0 means normal battery mode (100% charge)
0032 - 1 means battery life extender mode (80% charge)
0033
0034 What: /sys/devices/platform/samsung/usb_charge
0035 Date: December 1, 2011
0036 KernelVersion: 3.3
0037 Contact: Corentin Chary <corentin.chary@gmail.com>
0038 Description: Use your USB ports to charge devices, even
0039 when your laptop is powered off.
0040 1 means enabled, 0 means disabled.
0041
0042 What: /sys/devices/platform/samsung/lid_handling
0043 Date: December 11, 2014
0044 KernelVersion: 3.19
0045 Contact: Julijonas Kikutis <julijonas.kikutis@gmail.com>
0046 Description: Some Samsung laptops handle lid closing quicker and
0047 only handle lid opening with this mode enabled.
0048 1 means enabled, 0 means disabled.
