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input: Add support for keyboard matrix decoding from an fdt

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Matrix keyboards require a key map to be set up, and must also deal with
key ghosting.

Create a keyboard matrix management implementation which can be leveraged
by various keyboard drivers. This includes code to read the keymap from
the FDT and perform debouncing.

Signed-off-by: Bernie Thompson <bhthompson@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Bernie Thompson
2012-04-17 09:01:31 +00:00
committed by Albert ARIBAUD
parent 9bc590e511
commit 92c27c5193
3 changed files with 309 additions and 0 deletions
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2
drivers/input/Makefile
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@@ -26,11 +26,13 @@ include $(TOPDIR)/config.mk
LIB := $(obj)libinput.o
COBJS-$(CONFIG_I8042_KBD) += i8042.o
COBJS-$(CONFIG_TEGRA2_KEYBOARD) += tegra-kbc.o
ifdef CONFIG_PS2KBD
COBJS-y += keyboard.o pc_keyb.o
COBJS-$(CONFIG_PS2MULT) += ps2mult.o ps2ser.o
endif
COBJS-y += input.o
COBJS-$(CONFIG_OF_CONTROL) += key_matrix.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)