tree c73cfddac689a1b0a1827ae2687a30bd08e2a2ce
parent 4e647338944d0caede167bca2792b26a1dd39b54
author Juan Castillo <juan.castillo@arm.com> 1447692818 +0000
committer Juan Castillo <juan.castillo@arm.com> 1449739364 +0000

De-feature PL011 UART driver to match generic UART spec

The Server Base System Architecture document (ARM-DEN-0029)
specifies a generic UART device. The programmer's view of this
generic UART is a subset of the ARM PL011 UART. However, the
current PL011 driver in Trusted Firmware uses some features
that are outside the generic UART specification.

This patch modifies the PL011 driver to exclude features outside
the SBSA generic UART specification by setting the boolean build
option 'PL011_GENERIC_UART=1'. Default value is 0 (use full
PL011 features).

User guide updated.

Fixes ARM-software/tf-issues#216

Change-Id: I6e0eb86f9d69569bc3980fb57e70d6da5d91a737