// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2015 National Instruments */ #include <common.h> #include <dm.h> #include <serial.h> static int nulldev_serial_setbrg(struct udevice *dev, int baudrate) { return 0; } static int nulldev_serial_getc(struct udevice *dev) { return -EAGAIN; } static int nulldev_serial_pending(struct udevice *dev, bool input) { return 0; } static int nulldev_serial_input(struct udevice *dev) { return 0; } static int nulldev_serial_putc(struct udevice *dev, const char ch) { return 0; } static const struct udevice_id nulldev_serial_ids[] = { { .compatible = "nulldev-serial" }, { } }; const struct dm_serial_ops nulldev_serial_ops = { .putc = nulldev_serial_putc, .pending = nulldev_serial_pending, .getc = nulldev_serial_getc, .setbrg = nulldev_serial_setbrg, }; U_BOOT_DRIVER(serial_nulldev) = { .name = "serial_nulldev", .id = UCLASS_SERIAL, .of_match = nulldev_serial_ids, .ops = &nulldev_serial_ops, };