Input: add keypad driver for keys interfaced to TCA6416

This patch implements a simple Keypad driver that functions
as an I2C client. It handles key press events for keys
connected to TCA6416 I2C based IO expander.

Signed-off-by: Sriramakrishnan <srk@ti.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index a8293388d019..3525f533e186 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -179,6 +179,22 @@ config KEYBOARD_GPIO
           To compile this driver as a module, choose M here: the
           module will be called gpio_keys.
 
+config KEYBOARD_TCA6416
+        tristate "TCA6416 Keypad Support"
+        depends on I2C
+        help
+          This driver implements basic keypad functionality
+          for keys connected through TCA6416 IO expander
+
+          Say Y here if your device has keys connected to
+          TCA6416 IO expander. Your board-specific setup logic
+          must also provide pin-mask details(of which TCA6416 pins
+          are used for keypad).
+
+          If enabled the complete TCA6416 device will be managed through
+          this driver.
+
+
 config KEYBOARD_MATRIX
         tristate "GPIO driven matrix keypad support"
         depends on GENERIC_GPIO