On Sat, 14 Jul 2012 14:06:20 +0200
Gabor Juhos [off-list ref] wrote:

The loopback test mode is not implemented in all
NS16550 compatible UARTs. The 8250 driver uses the
UPF_SKIP_TEST flag to indicate this, however it is
not possible to set this flag via device-tree.

Add a new 'no-loopback-test' property, and modify
the of_serial driver to set the UPF_SKIP_TEST flag
if the property is present.

Signed-off-by: Gabor Juhos <redacted>

Looks good to me but clashes with the sync of the termios changes, which
we urgently need to get in first.

Greg - I'll add this to my patch stack with the relevant changes so that
it doesn't get messed up.

Alan