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authorBryan Wu <cooloney@kernel.org>2010-03-21 23:23:24 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2010-04-13 23:27:16 -0700
commit31a6296333b94964e9a073649840bb34d4603369 (patch)
tree18c209d358420a889bc93e376d92e176cffb2326 /include/linux/input.h
parenta5b33e6a207d75120ad9dad0b5401b561991dcce (diff)
Input: add Analog Devices AD714x captouch input driver
AD7142 and AD7147 are integrated capacitance-to-digital converters (CDCs) with on-chip environmental calibration for use in systems requiring a novel user input method. The AD7142 and AD7147 can interface to external capacitance sensors implementing functions such as buttons, scrollwheels, sliders, touchpads and so on. The chips don't restrict the specific usage. Depending on the hardware connection, one special target board can include one or several these components. The platform_data for the device's "struct device" holds these information. The data-struct defined in head file descript the hardware feature of button/scrollwheel/slider/touchpad components on target boards, which need be filled in the arch/mach-/. As the result, the driver is independent of boards. It gets the components layout from the platform_data, registers related devices, fullfills the algorithms and state machines for these components and report related input events to up level. Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Barry Song <21cnbao@gmail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include/linux/input.h')
-rw-r--r--include/linux/input.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/input.h b/include/linux/input.h
index 7ed2251b33f1..83524e4f3290 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -806,6 +806,7 @@ struct input_absinfo {
#define BUS_HOST 0x19
#define BUS_GSC 0x1A
#define BUS_ATARI 0x1B
+#define BUS_SPI 0x1C
/*
* MT_TOOL types