diff options
| author |   Jamie Iles <jamie@jamieiles.com> | 2011-06-27 13:32:34 +0100 |
|---|---|---|
| committer |   Grant Likely <grant.likely@secretlab.ca> | 2011-06-30 13:02:00 -0600 |
| commit | 7423734e19e7e0a90e3379152eacca2647f4377e (patch) | |
| tree | 134745d5a331c27fa0a63da59264a2aceaa0d4ac /drivers/tty | |
| parent | dt: document the of_serial bindings (diff) | |
| download | linux-dev-7423734e19e7e0a90e3379152eacca2647f4377e.tar.xz linux-dev-7423734e19e7e0a90e3379152eacca2647f4377e.zip | |
tty: of_serial: support for 32 bit accesses
Some platforms e.g. TI Davinci require 32-bit accesses to the UARTs.
The of_serial driver currently registers all UARTs as UPIO_MEM. Add a
new attribute "reg-io-width" to allow the port to be registered with
different IO width requirements.
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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 |