diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/of_serial.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index c911b2419abb..36038ed8f09a 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -65,6 +65,23 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev, port->irq = irq_of_parse_and_map(np, 0); port->iotype = UPIO_MEM; + prop = of_get_property(np, "reg-io-width", &prop_size); + if (prop && (prop_size == sizeof(u32))) { + switch (be32_to_cpup(prop)) { + case 1: + port->iotype = UPIO_MEM; + break; + case 4: + port->iotype = UPIO_MEM32; + break; + default: + dev_warn(&ofdev->dev, + "unsupported io width (%d bytes)\n", + be32_to_cpup(prop)); + return -EINVAL; + } + } + port->type = type; port->uartclk = be32_to_cpup(clk); port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP |