arm-trusted-firmware/drivers/arm
Juan Castillo 9400b40ea4 Disable PL011 UART before configuring it
The PL011 TRM (ARM DDI 0183G) specifies that the UART must be
disabled before any of the control registers are programmed. The
PL011 driver included in TF does not disable the UART, so the
initialization in BL2 and BL31 is violating this requirement
(and potentially in BL1 if the UART is enabled after reset).

This patch modifies the initialization function in the PL011
console driver to disable the UART before programming the
control registers.

Register clobber list and documentation updated.

Fixes ARM-software/tf-issues#300

Change-Id: I839b2d681d48b03f821ac53663a6a78e8b30a1a1
2016-01-21 17:27:47 +00:00
..
cci Use uintptr_t as base address type in ARM driver APIs 2015-07-09 11:53:32 +01:00
cci400 Fix debug assertion in deprecated CCI-400 driver 2015-10-12 10:21:55 +01:00
ccn Add a generic driver for ARM CCN IP 2015-09-14 22:09:40 +01:00
gic Rename GICv3 interrupt group macros 2015-12-04 12:02:12 +00:00
pl011 Disable PL011 UART before configuring it 2016-01-21 17:27:47 +00:00
sp804 Add SP804 delay timer driver 2015-06-18 16:06:26 +01:00
sp805 Add a simple ARM SP805 watchdog driver 2015-11-27 09:34:20 +00:00
tzc400 Remove the assert for TZC base during initialization 2015-12-08 15:32:43 +00:00