12d70b73aSGreg Kroah-HartmanWhat: /sys/devices/platform/samsung/performance_level 22d70b73aSGreg Kroah-HartmanDate: January 1, 2010 32d70b73aSGreg Kroah-HartmanKernelVersion: 2.6.33 4bc5bca53SGreg Kroah-HartmanContact: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 52d70b73aSGreg Kroah-HartmanDescription: Some Samsung laptops have different "performance levels" 6064cbc4fSGeert Uytterhoeven that can be modified by a function key, and by this 72d70b73aSGreg Kroah-Hartman sysfs file. These values don't always make a whole lot 82d70b73aSGreg Kroah-Hartman of sense, but some users like to modify them to keep 92d70b73aSGreg Kroah-Hartman their fans quiet at all costs. Reading from this file 102d70b73aSGreg Kroah-Hartman will show the current performance level. Writing to the 112d70b73aSGreg Kroah-Hartman file can change this value. 12*34433332SMauro Carvalho Chehab 132d70b73aSGreg Kroah-Hartman Valid options: 14*34433332SMauro Carvalho Chehab - "silent" 15*34433332SMauro Carvalho Chehab - "normal" 16*34433332SMauro Carvalho Chehab - "overclock" 17*34433332SMauro Carvalho Chehab 182d70b73aSGreg Kroah-Hartman Note that not all laptops support all of these options. 192d70b73aSGreg Kroah-Hartman Specifically, not all support the "overclock" option, 202d70b73aSGreg Kroah-Hartman and it's still unknown if this value even changes 212d70b73aSGreg Kroah-Hartman anything, other than making the user feel a bit better. 22cb5b5c91SCorentin Chary 233a75d378SCorentin CharyWhat: /sys/devices/platform/samsung/usb_charge 243a75d378SCorentin CharyDate: December 1, 2011 253a75d378SCorentin CharyKernelVersion: 3.3 263a75d378SCorentin CharyContact: Corentin Chary <corentin.chary@gmail.com> 273a75d378SCorentin CharyDescription: Use your USB ports to charge devices, even 283a75d378SCorentin Chary when your laptop is powered off. 293a75d378SCorentin Chary 1 means enabled, 0 means disabled. 30b0dcaf4fSJulijonas Kikutis 31b0dcaf4fSJulijonas KikutisWhat: /sys/devices/platform/samsung/lid_handling 32b0dcaf4fSJulijonas KikutisDate: December 11, 2014 33b0dcaf4fSJulijonas KikutisKernelVersion: 3.19 34b0dcaf4fSJulijonas KikutisContact: Julijonas Kikutis <julijonas.kikutis@gmail.com> 35b0dcaf4fSJulijonas KikutisDescription: Some Samsung laptops handle lid closing quicker and 36b0dcaf4fSJulijonas Kikutis only handle lid opening with this mode enabled. 37b0dcaf4fSJulijonas Kikutis 1 means enabled, 0 means disabled. 38