TODO RC

Minor bugs/improvement

struct ir_raw_event_ctrl member prev_ev. Investigate if this can be removed.
serial_ir tx w/ softcarrier, does it work on 32 bit? "new_duty_cycle * NSEC_PER_SEC" > 2^32.
if driver depends on RC_CORE, change this to select RC_CORE, depends on INPUT? OR use a patch like https://patchwork.linuxtv.org/patch/40601/ and remove "depends on RC_CORE".
RC device RC_DRIVER_IR_RAW_TX leaks dev->raw on rc_unregister_device()?
Unplug iguanair with lirc chardev open causes kernel to go bang

Make it possible to load multiple keymaps with ir-keytable. It should detect if the new keymap conflicts with any already loaded keymap, and ensure the right protocols are selected.
Further improvement: make the kernel mapping rc_proto:scancode -> keycode, not just scancode. This should reduce the number of possible conflicts.
lirc_zilog rc core driver (Sean Young working on this)
Once lirc_zilog is removed, remove lirc kapi. Example is here: https://git.linuxtv.org/syoung/media_tree.git/log/?h=remove-lirc-dev
Implement scancode reading and transmitting:
- It's very hard to tell what protocol a remote is using
- Kernel already has encoders, make sure they can be used for tx
- CEC might want to reuse this interface
- Patch series already exist for this
MS MCE Keyboard keymap needs multiple protocols. Keymap needed to select it. https://www.mail-archive.com/linux-media@vger.kernel.org/msg115706.html