serial: 8250_pxa: Switch to use uart_read_port_properties()

Since we have now a common helper to read port properties
use it instead of sparse home grown solution.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240304123035.758700-13-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: andy-shev

drivers/tty/serial/8250/8250_pxa.c

@@ -92,11 +92,7 @@ static int serial_pxa_probe(struct platform_device *pdev)
 	struct uart_8250_port uart = {};
 	struct pxa8250_data *data;
 	struct resource *mmres;
-	int irq, ret;
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
+	int ret;
 
 	mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!mmres)
@@ -114,21 +110,21 @@ 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;
-	uart.port.regshift = 2;
-	uart.port.irq = irq;
-	uart.port.fifosize = 64;
 	uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST | UPF_FIXED_TYPE;
 	uart.port.dev = &pdev->dev;
 	uart.port.uartclk = clk_get_rate(data->clk);
 	uart.port.pm = serial_pxa_pm;
 	uart.port.private_data = data;
+
+	ret = uart_read_port_properties(&uart.port);
+	if (ret)
+		return ret;
+
+	uart.port.iotype = UPIO_MEM32;
+	uart.port.regshift = 2;
+	uart.port.fifosize = 64;
 	uart.dl_write = serial_pxa_dl_write;
 
 	ret = serial8250_register_8250_port(&uart);