Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fde8be29 authored Jul 17, 2012 by Gabor Juhos Committed by Greg Kroah-Hartman Jul 17, 2012

tty: of_serial: add no-loopback-test property



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>

parent 36b3c070

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

+2 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,8 @@ Optional properties:
		accesses to the UART (e.g. TI davinci).
		- used-by-rtas : set to indicate that the port is in use by the OpenFirmware
		RTAS and should not be registered.
		- no-loopback-test: set to indicate that the port does not implements loopback
		test mode

		Example:

drivers/tty/serial/of_serial.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -105,6 +105,10 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
		port->uartclk = clk;
		port->flags = UPF_SHARE_IRQ \| UPF_BOOT_AUTOCONF \| UPF_IOREMAP
		\| UPF_FIXED_PORT \| UPF_FIXED_TYPE;

		if (of_find_property(np, "no-loopback-test", NULL))
		port->flags \|= UPF_SKIP_TEST;

		port->dev = &ofdev->dev;

		if (type == PORT_TEGRA)