linux/drivers/tty/serial/8250/8250_fsl.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Freescale 16550 UART "driver", Copyright (C) 2011 Paul Gortmaker.
 * Copyright 2020 NXP
 * Copyright 2020 Puresoftware Ltd.
 *
 * This isn't a full driver; it just provides an alternate IRQ
 * handler to deal with an errata and provide ACPI wrapper.
 * Everything else is just using the bog standard 8250 support.
 *
 * We follow code flow of serial8250_default_handle_irq() but add
 * a check for a break and insert a dummy read on the Rx for the
 * immediately following IRQ event.
 *
 * We re-use the already existing "bug handling" lsr_saved_flags
 * field to carry the "what we just did" information from the one
 * IRQ event to the next one.
 */

#include <linux/acpi.h>
#include <linux/serial_reg.h>
#include <linux/serial_8250.h>

#include "8250.h"

int fsl8250_handle_irq(struct uart_port *port)
{ … }
EXPORT_SYMBOL_GPL(…);

#ifdef CONFIG_ACPI
struct fsl8250_data { … };

static int fsl8250_acpi_probe(struct platform_device *pdev)
{ … }

static void fsl8250_acpi_remove(struct platform_device *pdev)
{ … }

static const struct acpi_device_id fsl_8250_acpi_id[] = …;
MODULE_DEVICE_TABLE(acpi, fsl_8250_acpi_id);

static struct platform_driver fsl8250_platform_driver = …;

module_platform_driver(…) …;
#endif

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;