Input: add dm355evm_keys driver

Simple input driver support for the events reported by the
MSP430 firmware on the DM355 EVM.  Verified using the RC5
remote included with the kit; docs weren't quite right.

Some of the keycode selections might need improvement; they
can be remapped, so there's at least a runtime workaround.
(I also suspect Linux may someday merit more generic support
for RC5 based remote controls.)

These events don't distinguish key press vs release events,
so this reports both and then skips the next event if it's
identical.  The RC5 remote codes include a "toggle" bit that
can help detect autorepeated keys; but this driver doesn't
bother with those nuances.

This driver relies on the drivers/mfd/dm355evm_msp.c code
for core features, including sharing I2C access to this
firmware with GPIO, LED, and RTC support.

[dtor@mail.ru: fix error unwindng path in probe()]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 6cff5acfa85a..4399f54c043c 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -260,4 +260,13 @@ config INPUT_RB532_BUTTON
           To compile this driver as a module, choose M here: the
           module will be called rb532_button.
 
+config INPUT_DM355EVM
+        tristate "TI DaVinci DM355 EVM Keypad and IR Remote"
+        depends on MFD_DM355EVM_MSP
+        help
+          Supports the pushbuttons and IR remote used with
+          the DM355 EVM board.
+
+          To compile this driver as a module, choose M here: the
+          module will be called dm355evm_keys.
 endif