AM3517 EVM with APPS board includes keys interfaced to TCA6416 IO expander.
User keys are connected as GPIO lines to TCA6416 IO expander. Unlike the
case with generic gpio-keypad driver individual keys do not generate an
interrupt event. Hence we implement a simple keypad driver(based on gpio-keys)
that registers as direct I2C client.
The implementation has been tested on AM3517 EVM with the driver tested
in polling mode.
Sriramakrishnan (3):
TCA6416 keypad : Implement keypad driver for keys interfaced to
TCA6416
AM3517 EVM : Enable TCA6416 keypad
AM3517: Board hookup for TCA6416 keypad driver.
arch/arm/configs/am3517_evm_defconfig | 15 ++-
arch/arm/mach-omap2/board-am3517evm.c | 48 ++++-
drivers/input/keyboard/Kconfig | 17 ++
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/tca6416-keypad.c | 355 +++++++++++++++++++++++++++++++
include/linux/tca6416_keypad.h | 30 +++
6 files changed, 460 insertions(+), 6 deletions(-)
create mode 100755 drivers/input/keyboard/tca6416-keypad.c
create mode 100755 include/linux/tca6416_keypad.h
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