Platform: add Samsung Laptop platform driver

[linux-2.6-microblaze.git] / Documentation / ABI / testing / sysfs-driver-samsung-laptop

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+What:          /sys/devices/platform/samsung/performance_level
+Date:          January 1, 2010
+KernelVersion: 2.6.33
+Contact:       Greg Kroah-Hartman <gregkh@suse.de>
+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.