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serial: 8250_pxa: honor the port number from devicetree

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Like the other OF-enabled drivers, use the port number from the firmware if
the devicetree specifies an alias:

  aliases {
      ...
      serial2 = &uart2; /* Should be ttyS2 */
  }

This is how the deprecated pxa.c driver behaved, switching to 8250_pxa
messes up the numbering.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lubomir Rintel 2019-02-24 12:58:02 +01:00 committed by Greg Kroah-Hartman
parent d56f00fd53
commit fe9ed6d248
1 changed files with 4 additions and 0 deletions
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4
drivers/tty/serial/8250/8250_pxa.c
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@ -113,6 +113,10 @@ static int serial_pxa_probe(struct platform_device *pdev)
if (ret)
return ret;
ret = of_alias_get_id(pdev->dev.of_node, "serial");
if (ret >= 0)
uart.port.line = ret;
uart.port.type = PORT_XSCALE;
uart.port.iotype = UPIO_MEM32;
uart.port.mapbase = mmres->start;