2011-03-12 01:41:19 +08:00
|
|
|
What: /sys/devices/platform/samsung/performance_level
|
|
|
|
|
Date: January 1, 2010
|
|
|
|
|
KernelVersion: 2.6.33
|
2012-02-16 06:48:01 +08:00
|
|
|
Contact: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
2011-03-12 01:41:19 +08:00
|
|
|
Description: Some Samsung laptops have different "performance levels"
|
|
|
|
|
that are can be modified by a function key, and by this
|
|
|
|
|
sysfs file. These values don't always make a whole lot
|
|
|
|
|
of sense, but some users like to modify them to keep
|
|
|
|
|
their fans quiet at all costs. Reading from this file
|
|
|
|
|
will show the current performance level. Writing to the
|
|
|
|
|
file can change this value.
|
|
|
|
|
Valid options:
|
|
|
|
|
"silent"
|
|
|
|
|
"normal"
|
|
|
|
|
"overclock"
|
|
|
|
|
Note that not all laptops support all of these options.
|
|
|
|
|
Specifically, not all support the "overclock" option,
|
|
|
|
|
and it's still unknown if this value even changes
|
|
|
|
|
anything, other than making the user feel a bit better.
|
2011-11-26 18:00:05 +08:00
|
|
|
|
|
|
|
|
What: /sys/devices/platform/samsung/battery_life_extender
|
|
|
|
|
Date: December 1, 2011
|
|
|
|
|
KernelVersion: 3.3
|
|
|
|
|
Contact: Corentin Chary <corentin.chary@gmail.com>
|
|
|
|
|
Description: Max battery charge level can be modified, battery cycle
|
|
|
|
|
life can be extended by reducing the max battery charge
|
|
|
|
|
level.
|
|
|
|
|
0 means normal battery mode (100% charge)
|
|
|
|
|
1 means battery life extender mode (80% charge)
|
2011-11-26 18:00:06 +08:00
|
|
|
|
|
|
|
|
What: /sys/devices/platform/samsung/usb_charge
|
|
|
|
|
Date: December 1, 2011
|
|
|
|
|
KernelVersion: 3.3
|
|
|
|
|
Contact: Corentin Chary <corentin.chary@gmail.com>
|
|
|
|
|
Description: Use your USB ports to charge devices, even
|
|
|
|
|
when your laptop is powered off.
|
|
|
|
|
1 means enabled, 0 means disabled.
|
