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libpayload: ipq808x: introduce uart driver

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This adds a UART driver for the ipq8064 controller. It still does not
quite work in the receive direction - the receive FIFO returns read
data in 32 bit chunks, which means that 4 keys need to be pressed
before a character pops out of the driver (and it reports it as a
single character).

This issue is being addressed separately, the driver is being checked
in to facilitate concurrent development.

BUG=chrome-os-partner:27784, chrome-os-partner:29313

TEST=with deptcharge modifications in place, the AP148 board comes up
     to the depthcharge prompt:

Starting depthcharge on storm...

Original-Change-Id: Ief2cfcca73494be5c4147881144470078adcefb8
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/202045
Original-Reviewed-by: Deepa Dinamani <deepad@codeaurora.org>
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
(cherry picked from commit 4499318fb9a4e663c504d7c41380ccf2aa89da29)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I3e07d7568c20c0e570222971ff219de3a6d9b7cc
Reviewed-on: http://review.coreboot.org/8061
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Vadim Bendebury
2014-05-27 18:28:59 -07:00
committed by Marc Jones
parent bc8b4fad1e
commit 897123ab2f
5 changed files with 375 additions and 2 deletions
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5
payloads/libpayload/Config.in
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@@ -178,6 +178,11 @@ config TEGRA_SERIAL_CONSOLE
depends on SERIAL_CONSOLE
default n
config IPQ806X_SERIAL_CONSOLE
bool "IPQ806x SOC compatible serial port driver"
depends on SERIAL_CONSOLE
default n
config PL011_SERIAL_CONSOLE
bool "PL011 compatible serial port driver"
depends on 8250_SERIAL_CONSOLE