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.goldschm...@gmail.com> > Reviewed-by: Simon Glass <s...@chromium.org>
Applied to u-boot/master, thanks! -- Tom
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