[U-Boot] serial: ns16550: fix debug uart putc called before init

[Simon Goldschmidt]

On Wed, Jan 16, 2019 at 3:44 AM Tom Rini <trini at konsulko.com> wrote:
>
> On Wed, Jan 09, 2019 at 08:35:31PM +0100, Simon Goldschmidt wrote:
>
> > If _debug_uart_putc() is called before _debug_uart_init(), the
> > ns16550 debug uart driver hangs in a tight loop waiting for the
> > tx FIFO to get empty.
> >
> > As this can happen via a printf sneaking in before the port calls
> > debug_uart_init(), introduce a config option to ignore characters
> > before the debug uart is initialized.
> >
> > This is done by reading the baudrate divisor and aborting if is zero.
> >
> > The Kconfig option is required as reading the baudrate divisor does
> > not seem to work for all ns16500 compatibles (which is why the last
> > attempt on this has been reverted in 1a67969a99).
> >
> > Tested on socfpga_cyclone5_socrates.
> >
> > Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>
> > Reviewed-by: Simon Glass <sjg at chromium.org>
>
> Applied to u-boot/master, thanks!

I don't see this or any of my other patches in u-boot/master (neither github
nor denx.de), is that expected?

Regards,
Simon