arm-trusted-firmware/drivers
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
..
arm Disable PL011 UART before configuring it 2016-01-21 17:27:47 +00:00
auth Always build with '-pedantic' 2016-01-05 11:41:08 +00:00
console Disable PL011 UART before configuring it 2016-01-21 17:27:47 +00:00
delay_timer Add a simple delay timer driver API 2015-06-17 13:13:54 +01:00
io Remove deprecated IO return definitions 2015-11-02 10:47:01 +00:00
ti/uart Driver for 16550 UART interface 2015-05-29 11:25:20 +05:30