change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/drivers/tty/serial/8250/8250_em.c
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@@ -39,7 +39,7 @@
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 		break;
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 	case UART_IER: /* IER @ 0x04 */
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 		value &= 0x0f; /* only 4 valid bits - not Xscale */
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-		/* fall-through */
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+		fallthrough;
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 	case UART_DLL_EM: /* DLL @ 0x24 (+9) */
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 	case UART_DLM_EM: /* DLM @ 0x28 (+9) */
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 		writel(value, p->membase + (offset << 2));
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@@ -78,14 +78,18 @@
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 static int serial8250_em_probe(struct platform_device *pdev)
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 {
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-	struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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 	struct serial8250_em_priv *priv;
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 	struct uart_8250_port up;
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-	int ret;
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+	struct resource *regs;
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+	int irq, ret;
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-	if (!regs || !irq) {
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-		dev_err(&pdev->dev, "missing registers or irq\n");
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+	irq = platform_get_irq(pdev, 0);
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+	if (irq < 0)
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+		return irq;
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+
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+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+	if (!regs) {
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+		dev_err(&pdev->dev, "missing registers\n");
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 		return -EINVAL;
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 	}
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@@ -101,9 +105,9 @@
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 	memset(&up, 0, sizeof(up));
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 	up.port.mapbase = regs->start;
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-	up.port.irq = irq->start;
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-	up.port.type = PORT_UNKNOWN;
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-	up.port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_IOREMAP;
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+	up.port.irq = irq;
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+	up.port.type = PORT_16750;
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+	up.port.flags = UPF_FIXED_PORT | UPF_IOREMAP | UPF_FIXED_TYPE;
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 	up.port.dev = &pdev->dev;
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 	up.port.private_data = priv;
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