2 # X86 Platform Specific Drivers
5 menuconfig X86_PLATFORM_DEVICES
6 bool "X86 Platform Specific Device Drivers"
9 Say Y here to get to see options for device drivers for various
10 x86 platforms, including vendor-specific laptop extension drivers.
11 This option alone does not add any kernel code.
13 If you say N, all options in this submenu will be skipped and disabled.
15 if X86_PLATFORM_DEVICES
18 tristate "ThinkPad ACPI Laptop Extras"
21 select BACKLIGHT_LCD_SUPPORT
22 select BACKLIGHT_CLASS_DEVICE
30 This is a driver for the IBM and Lenovo ThinkPad laptops. It adds
31 support for Fn-Fx key combinations, Bluetooth control, video
32 output switching, ThinkLight control, UltraBay eject and more.
33 For more information about this driver see
34 <file:Documentation/laptops/thinkpad-acpi.txt> and
35 <http://ibm-acpi.sf.net/> .
37 This driver was formerly known as ibm-acpi.
39 If you have an IBM or Lenovo ThinkPad laptop, say Y or M here.
41 config THINKPAD_ACPI_DEBUGFACILITIES
42 bool "Maintainer debug facilities"
43 depends on THINKPAD_ACPI
46 Enables extra stuff in the thinkpad-acpi which is completely useless
47 for normal use. Read the driver source to find out what it does.
49 Say N here, unless you were told by a kernel maintainer to do
52 config THINKPAD_ACPI_DEBUG
53 bool "Verbose debug mode"
54 depends on THINKPAD_ACPI
57 Enables extra debugging information, at the expense of a slightly
58 increase in driver size.
60 If you are not sure, say N here.
62 config THINKPAD_ACPI_UNSAFE_LEDS
63 bool "Allow control of important LEDs (unsafe)"
64 depends on THINKPAD_ACPI
67 Overriding LED state on ThinkPads can mask important
68 firmware alerts (like critical battery condition), or misled
69 the user into damaging the hardware (undocking or ejecting
70 the bay while buses are still active), etc.
72 LED control on the ThinkPad is write-only (with very few
73 exceptions on very ancient models), which makes it
74 impossible to know beforehand if important information will
75 be lost when one changes LED state.
77 Users that know what they are doing can enable this option
78 and the driver will allow control of every LED, including
79 the ones on the dock stations.
81 Never enable this option on a distribution kernel.
83 Say N here, unless you are building a kernel for your own
84 use, and need to control the important firmware LEDs.
86 config THINKPAD_ACPI_DOCK
87 bool "Legacy Docking Station Support"
88 depends on THINKPAD_ACPI
89 depends on ACPI_DOCK=n
93 Allows the thinkpad_acpi driver to handle docking station events.
94 This support was made obsolete by the generic ACPI docking station
95 support (CONFIG_ACPI_DOCK). It will allow locking and removing the
96 laptop from the docking station, but will not properly connect PCI
99 If you are not sure, say N here.
101 config THINKPAD_ACPI_BAY
102 bool "Legacy Removable Bay Support"
103 depends on THINKPAD_ACPI
107 Allows the thinkpad_acpi driver to handle removable bays. It will
108 electrically disable the device in the bay, and also generate
109 notifications when the bay lever is ejected or inserted.
111 If you are not sure, say Y here.
113 config THINKPAD_ACPI_VIDEO
114 bool "Video output control support"
115 depends on THINKPAD_ACPI
118 Allows the thinkpad_acpi driver to provide an interface to control
119 the various video output ports.
121 This feature often won't work well, depending on ThinkPad model,
122 display state, video output devices in use, whether there is a X
123 server running, phase of the moon, and the current mood of
124 Schroedinger's cat. If you can use X.org's RandR to control
125 your ThinkPad's video output ports instead of this feature,
126 don't think twice: do it and say N here to save some memory.
128 If you are not sure, say Y here.
130 config THINKPAD_ACPI_HOTKEY_POLL
131 bool "Support NVRAM polling for hot keys"
132 depends on THINKPAD_ACPI
135 Some thinkpad models benefit from NVRAM polling to detect a few of
136 the hot key press events. If you know your ThinkPad model does not
137 need to do NVRAM polling to support any of the hot keys you use,
138 unselecting this option will save about 1kB of memory.
140 ThinkPads T40 and newer, R52 and newer, and X31 and newer are
141 unlikely to need NVRAM polling in their latest BIOS versions.
143 NVRAM polling can detect at most the following keys: ThinkPad/Access
144 IBM, Zoom, Switch Display (fn+F7), ThinkLight, Volume up/down/mute,
145 Brightness up/down, Display Expand (fn+F8), Hibernate (fn+F12).
147 If you are not sure, say Y here. The driver enables polling only if
148 it is strictly necessary to do so.
150 endif # X86_PLATFORM_DEVICES