On Mon, Aug 15, 2016 at 05:48:51PM +0200, Alexander Graf wrote: > On the raspberry pi, you can disable the serial port to gain dynamic frequency > scaling which can get handy at times. > > However, in such a configuration the serial controller gets its rx queue > filled > up with zero bytes which then happily get transmitted on to whoever calls > getc() today. > > This patch adds detection logic for that case by checking whether the RX pin > is > mapped to GPIO15 and disables the mini uart if it is not mapped properly. > > That way we can leave the driver enabled in the tree and can determine during > runtime whether serial is usable or not, having a single binary that allows > for > uart and non-uart operation. > > Signed-off-by: Alexander Graf <ag...@suse.de> > Acked-by: Stephen Warren <swar...@wwwdotorg.org> > Reviewed-by: Simon Glass <s...@chromium.org>
Applied to u-boot/master, thanks! -- Tom
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