serial: pl011: Fix DMA issues on 64bit PL330 based systems

This patch set fixes a number of issues found when using DMA driven UART transfers on the PL011 UART through a DMA330 DMA controller on a 64bit system.

Andrew Jackson (5):
serial: pl011: Allocate TX DMA buffer from DMA capable memory
serial: pl011: Avoid assumptions about buffer size when refilling TX
DMA
serial: pl011: Set length of DMA transfer
serial: pl011: Don't enable RX DMA if residue processing not
supported
serial: pl011: Add device tree support for RX DMA polling

 Documentation/devicetree/bindings/serial/pl011.txt |   19 +++++---
 drivers/tty/serial/amba-pl011.c                    |   46 +++++++++++++++++--
 2 files changed, 53 insertions(+), 12 deletions(-)