Anton Staaf 1e3d00ff7a USART: Add DMA based transmitter ...

This adds a new transmission implementation for the multi UART driver.
It is a DMA based transmitter that can directly read from the TX queue
with zero copy overhead.  The DMA channel used as well as the maximum
DMA transmission size are configurable per UART at the board level.

This also updates the Ryu AP UART to use DMA transmission.

Signed-off-by: Anton Staaf <robotboy@chromium.org>

BRANCH=None
BUG=None
TEST=make buildall -j
     Manually verify that the AP UART forwarding works

Change-Id: I3cb27d0f9015043d75a38c12919388afe90dc4af
Reviewed-on: https://chromium-review.googlesource.com/286274
Trybot-Ready: Anton Staaf <robotboy@chromium.org>
Tested-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>

2015-07-21 18:30:40 +00:00

..

g

cleanup: GPIO: Use common macro for converting mask to GPIO

2015-07-19 20:38:37 +00:00

host

cleanup: fix all the header guards

2015-06-18 19:07:00 +00:00

it83xx

ADC: Add common priority for the ADC init

2015-07-16 05:15:22 +00:00

lm4

ADC: Add common priority for the ADC init

2015-07-16 05:15:22 +00:00

mec1322

mec1322: hibernate: Fix wake-on-AC for USB-C

2015-07-20 19:13:25 +00:00

npcx

ADC: Add common priority for the ADC init

2015-07-16 05:15:22 +00:00

nrf51

cleanup: GPIO: Use common macro for converting mask to GPIO

2015-07-19 20:38:37 +00:00

stm32

USART: Add DMA based transmitter

2015-07-21 18:30:40 +00:00