tty: of_serial: add no-loopback-test property

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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 <juhosg@openwrt.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Gabor Juhos 2012-07-17 17:08:31 +01:00 • committed by Greg Kroah-Hartman

parent 36b3c070d2

commit fde8be2923

2 changed files with 6 additions and 0 deletions

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2

Documentation/devicetree/bindings/tty/serial/of-serial.txt

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4

drivers/tty/serial/of_serial.c

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