[U-Boot] [PATCH] serial: pl01x: Add support for devices with the rate pre-configured.

[Stephen Warren]

On 02/05/2016 02:43 PM, Eric Anholt wrote:
> For Raspberry Pi, we had the input clock rate to the pl011 fixed in
> the rpi.c file, but it may be changed by firmware due to user changes
> to config.txt.  Since the firmware always sets up the uart (default
> 115200 output unless the user changes it), we can just skip our own
> uart init to simplify the boot process and more reliably get serial
> output.

Tested-by: Stephen Warren <swarren at wwwdotorg.org>
(With a 6MHz init_uart_clock and with/without init_uart_baud=9600)