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serial: 8250: add support for ACPI-probed serial port for X-Gene platform 

Enable APM X-Gene SoC serial port functionality when using ACPI table to
initialize serial port.

Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Feng Kan 2014-12-05 17:45:57 -08:00 committed by Greg Kroah-Hartman
parent 9bdd6369aa
commit 5e1aeea52f
1 changed files with 11 additions and 0 deletions
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11
drivers/tty/serial/8250/8250_dw.c
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@ -351,10 +351,20 @@ static int dw8250_probe_of(struct uart_port *p,
static int dw8250_probe_acpi(struct uart_8250_port *up,
struct dw8250_data *data)
{
const struct acpi_device_id *id;
struct uart_port *p = &up->port;
dw8250_setup_port(up);
id = acpi_match_device(p->dev->driver->acpi_match_table, p->dev);
if (!id)
return -ENODEV;
if (!p->uartclk)
if (device_property_read_u32(p->dev, "clock-frequency",
&p->uartclk))
return -EINVAL;
p->iotype = UPIO_MEM32;
p->serial_in = dw8250_serial_in32;
p->serial_out = dw8250_serial_out32;
@ -577,6 +587,7 @@ static const struct acpi_device_id dw8250_acpi_match[] = {
{ "INT3435", 0 },
{ "80860F0A", 0 },
{ "8086228A", 0 },
{ "APMC0D08", 0},
{ },
};
MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match);