1 What: /sys/devices/platform/samsung/ 1 What: /sys/devices/platform/samsung/performance_level
2 Date: January 1, 2010 2 Date: January 1, 2010
3 KernelVersion: 2.6.33 3 KernelVersion: 2.6.33
4 Contact: Greg Kroah-Hartman <gregkh@linu 4 Contact: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 Description: Some Samsung laptops have diff 5 Description: Some Samsung laptops have different "performance levels"
6 that can be modified by a func 6 that can be modified by a function key, and by this
7 sysfs file. These values don' 7 sysfs file. These values don't always make a whole lot
8 of sense, but some users like 8 of sense, but some users like to modify them to keep
9 their fans quiet at all costs. 9 their fans quiet at all costs. Reading from this file
10 will show the current performa 10 will show the current performance level. Writing to the
11 file can change this value. 11 file can change this value.
12 12
13 Valid options: 13 Valid options:
14 - "silent" 14 - "silent"
15 - "normal" 15 - "normal"
16 - "overclock" 16 - "overclock"
17 17
18 Note that not all laptops supp 18 Note that not all laptops support all of these options.
19 Specifically, not all support 19 Specifically, not all support the "overclock" option,
20 and it's still unknown if this 20 and it's still unknown if this value even changes
21 anything, other than making th 21 anything, other than making the user feel a bit better.
22 22
23 What: /sys/devices/platform/samsung/ 23 What: /sys/devices/platform/samsung/battery_life_extender
24 Date: December 1, 2011 24 Date: December 1, 2011
25 KernelVersion: 3.3 25 KernelVersion: 3.3
26 Contact: Corentin Chary <corentin.chary@ 26 Contact: Corentin Chary <corentin.chary@gmail.com>
27 Description: Max battery charge level can b 27 Description: Max battery charge level can be modified, battery cycle
28 life can be extended by reduci 28 life can be extended by reducing the max battery charge
29 level. 29 level.
30 30
31 - 0 means normal battery mode 31 - 0 means normal battery mode (100% charge)
32 - 1 means battery life extende 32 - 1 means battery life extender mode (80% charge)
33 33
34 What: /sys/devices/platform/samsung/ 34 What: /sys/devices/platform/samsung/usb_charge
35 Date: December 1, 2011 35 Date: December 1, 2011
36 KernelVersion: 3.3 36 KernelVersion: 3.3
37 Contact: Corentin Chary <corentin.chary@ 37 Contact: Corentin Chary <corentin.chary@gmail.com>
38 Description: Use your USB ports to charge d 38 Description: Use your USB ports to charge devices, even
39 when your laptop is powered of 39 when your laptop is powered off.
40 1 means enabled, 0 means disab 40 1 means enabled, 0 means disabled.
41 41
42 What: /sys/devices/platform/samsung/ 42 What: /sys/devices/platform/samsung/lid_handling
43 Date: December 11, 2014 43 Date: December 11, 2014
44 KernelVersion: 3.19 44 KernelVersion: 3.19
45 Contact: Julijonas Kikutis <julijonas.ki 45 Contact: Julijonas Kikutis <julijonas.kikutis@gmail.com>
46 Description: Some Samsung laptops handle li 46 Description: Some Samsung laptops handle lid closing quicker and
47 only handle lid opening with t 47 only handle lid opening with this mode enabled.
48 1 means enabled, 0 means disab 48 1 means enabled, 0 means disabled.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.