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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: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jamie Iles 2011-08-16 17:47:47 +01:00 committed by Greg Kroah-Hartman
parent 6b1a98d1c4
commit 14a8d47d4e
2 changed files with 8 additions and 0 deletions
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1
Documentation/devicetree/bindings/tty/serial/of-serial.txt
View File

@ -3,6 +3,7 @@
Required properties:
- compatible : one of:
- "ns8250"
- "ns8250dw"
- "ns16450"
- "ns16550a"
- "ns16550"

7
drivers/tty/serial/of_serial.c
View File

@ -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, },