add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/tty/serial/arc_uart.c
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@@ -609,10 +609,11 @@
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 	}
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 	uart->baud = val;
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-	port->membase = of_iomap(np, 0);
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-	if (!port->membase)
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+	port->membase = devm_platform_ioremap_resource(pdev, 0);
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+	if (IS_ERR(port->membase)) {
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 		/* No point of dev_err since UART itself is hosed here */
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-		return -ENXIO;
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+		return PTR_ERR(port->membase);
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+	}
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 	port->irq = irq_of_parse_and_map(np, 0);
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