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serial: 8250_exar: Extract exar_get_platform() helper

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We would like to use DMI matching in other functions as well.
Hence, extract it as exar_get_platform() helper function.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210608144239.12697-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2021-06-08 17:42:38 +03:00 committed by Greg Kroah-Hartman
parent e901000aa6
commit 7d356a438b
1 changed files with 12 additions and 8 deletions
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20
drivers/tty/serial/8250/8250_exar.c
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@ -501,23 +501,27 @@ static const struct dmi_system_id exar_platforms[] = {
{}
};
static const struct exar8250_platform *exar_get_platform(void)
{
const struct dmi_system_id *dmi_match;
dmi_match = dmi_first_match(exar_platforms);
if (dmi_match)
return dmi_match->driver_data;
return &exar8250_default_platform;
}
static int
pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
struct uart_8250_port *port, int idx)
{
const struct exar8250_platform *platform;
const struct dmi_system_id *dmi_match;
const struct exar8250_platform *platform = exar_get_platform();
unsigned int offset = idx * 0x400;
unsigned int baud = 7812500;
u8 __iomem *p;
int ret;
dmi_match = dmi_first_match(exar_platforms);
if (dmi_match)
platform = dmi_match->driver_data;
else
platform = &exar8250_default_platform;
port->port.uartclk = baud * 16;
port->port.rs485_config = platform->rs485_config;