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Commit 14a8d47d authored by Jamie Iles's avatar Jamie Iles Committed by Greg Kroah-Hartman
Browse files

tty: of_serial: add support for the DesignWare 8250 



Support the DesignWare 8250 by a new compatible string and registering
the DesignWare helpers.  If the registration of the helpers fails, then
continue as a normal 8250 as we may still get some useful debug out.

Cc: Alan Cox <alan@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarJamie Iles <jamie@jamieiles.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6b1a98d1

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

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
Required properties:

- compatible : one of:

	- "ns8250"

	- "ns8250dw"

	- "ns16450"

	- "ns16550a"

	- "ns16550"

drivers/tty/serial/of_serial.c

+7 −0
Original line number Diff line number Diff line
@@ -78,6 +78,12 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev, 
		}

	}



	if (of_device_is_compatible(np, "ns8250dw")) {

		ret = serial8250_use_designware_io(port);

		if (ret)

			dev_warn(&ofdev->dev, "unable to register DesignWare 8250 helpers, continuing as a normal 8250\n");

	}



	port->type = type;

	port->uartclk = clk;

	port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
@@ -176,6 +182,7 @@ static int of_platform_serial_remove(struct platform_device *ofdev) 
 */

static struct of_device_id __devinitdata of_platform_serial_table[] = {

	{ .compatible = "ns8250",   .data = (void *)PORT_8250, },

	{ .compatible = "ns8250dw", .data = (void *)PORT_8250, },

	{ .compatible = "ns16450",  .data = (void *)PORT_16450, },

	{ .compatible = "ns16550a", .data = (void *)PORT_16550A, },

	{ .compatible = "ns16550",  .data = (void *)PORT_16550, },