[coreboot-gerrit] Change in coreboot[master]: soc/amd/picasso/acpi: add UART DMA controller devices

[Felix Held (Code Review)]

Hello build bot (Jenkins), Raul Rangel, Furquan Shaikh, Marshall Dawson, Aaron Durbin,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/45479

to look at the new patch set (#2).

Change subject: soc/amd/picasso/acpi: add UART DMA controller devices
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soc/amd/picasso/acpi: add UART DMA controller devices

The four Designware UARTs in the SoC each have a PL330 DMA controller
attached that shares the IRQ of the UART and has its two DMA channels
hard wired to the RX and TX channels of the UART. This patch exposes
those DMA controllers as ACPI devices with the HID AMD0023. At 3Mbaud
we need to use the DMA controller to avoid that some bytes got dropped
occasionally.

The kernel-side patches are currently still work in progress.

BUG=b:160208269

Change-Id: I54c3f3d9b6806884366fdef131306c02d1142657
Signed-off-by: Julian Schroeder 
---
M src/soc/amd/picasso/acpi/sb_fch.asl
1 file changed, 130 insertions(+), 16 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/79/45479/2