AMD/bettong: Add UART support

Hardware / Coreboot - Zheng Bao [gmail.com] - 24 November 2015 13:57 UTC

The function delay in uart8250mem.c is not enough for hudson. I guess there are some problems in lapic_timer(). I uploaded a patch to gerrit to show the way to enable UART feature. http://review.coreboot.org/#/c/12343/4

Currently the HUDSON_UART is unchecked by default. Select HUDSON_UART to enable this feature.

The UART is test at BIOS stage.

Since it is not a standart UART device, the windows internal UART driver doesnt support it. I guess we need a driver to use it on windows.

Change-Id: I4cec833cc2ff8069c82886837f7cbd4483ff11bb

2286138 AMD/bettong: Add UART support
src/mainboard/amd/bettong/romstage.c | 3 +++
src/southbridge/amd/pi/hudson/Kconfig | 16 ++++++++++++++
src/southbridge/amd/pi/hudson/Makefile.inc | 5 +++++
src/southbridge/amd/pi/hudson/early_setup.c | 31 +++++++++++++++++++++++++++
src/southbridge/amd/pi/hudson/hudson.h | 3 +++
5 files changed, 58 insertions(+)

Upstream: review.coreboot.org

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