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    Subject[PATCH AUTOSEL 5.0 082/262] serial: 8250_pxa: honor the port number from devicetree
    Date
    From: Lubomir Rintel <lkundrak@v3.sk>

    [ Upstream commit fe9ed6d2483fda55465f32924fb15bce0fac3fac ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/tty/serial/8250/8250_pxa.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/drivers/tty/serial/8250/8250_pxa.c b/drivers/tty/serial/8250/8250_pxa.c
    index b9bcbe20a2be..c47188860e32 100644
    --- a/drivers/tty/serial/8250/8250_pxa.c
    +++ b/drivers/tty/serial/8250/8250_pxa.c
    @@ -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;
    --
    2.19.1
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