1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
2cac73f20SKeng Soon Cheah /*
3cac73f20SKeng Soon Cheah * Copyright (c) 2015 National Instruments
4cac73f20SKeng Soon Cheah */
5cac73f20SKeng Soon Cheah
6cac73f20SKeng Soon Cheah #include <common.h>
7cac73f20SKeng Soon Cheah #include <dm.h>
8cac73f20SKeng Soon Cheah #include <serial.h>
9cac73f20SKeng Soon Cheah
nulldev_serial_setbrg(struct udevice * dev,int baudrate)10cac73f20SKeng Soon Cheah static int nulldev_serial_setbrg(struct udevice *dev, int baudrate)
11cac73f20SKeng Soon Cheah {
12cac73f20SKeng Soon Cheah return 0;
13cac73f20SKeng Soon Cheah }
14cac73f20SKeng Soon Cheah
nulldev_serial_getc(struct udevice * dev)15cac73f20SKeng Soon Cheah static int nulldev_serial_getc(struct udevice *dev)
16cac73f20SKeng Soon Cheah {
17cac73f20SKeng Soon Cheah return -EAGAIN;
18cac73f20SKeng Soon Cheah }
19cac73f20SKeng Soon Cheah
nulldev_serial_pending(struct udevice * dev,bool input)20b12907f2SWilson Lee static int nulldev_serial_pending(struct udevice *dev, bool input)
21b12907f2SWilson Lee {
22b12907f2SWilson Lee return 0;
23b12907f2SWilson Lee }
24b12907f2SWilson Lee
nulldev_serial_input(struct udevice * dev)25cac73f20SKeng Soon Cheah static int nulldev_serial_input(struct udevice *dev)
26cac73f20SKeng Soon Cheah {
27cac73f20SKeng Soon Cheah return 0;
28cac73f20SKeng Soon Cheah }
29cac73f20SKeng Soon Cheah
nulldev_serial_putc(struct udevice * dev,const char ch)30cac73f20SKeng Soon Cheah static int nulldev_serial_putc(struct udevice *dev, const char ch)
31cac73f20SKeng Soon Cheah {
32cac73f20SKeng Soon Cheah return 0;
33cac73f20SKeng Soon Cheah }
34cac73f20SKeng Soon Cheah
35cac73f20SKeng Soon Cheah static const struct udevice_id nulldev_serial_ids[] = {
36cac73f20SKeng Soon Cheah { .compatible = "nulldev-serial" },
37cac73f20SKeng Soon Cheah { }
38cac73f20SKeng Soon Cheah };
39cac73f20SKeng Soon Cheah
40cac73f20SKeng Soon Cheah
41cac73f20SKeng Soon Cheah const struct dm_serial_ops nulldev_serial_ops = {
42cac73f20SKeng Soon Cheah .putc = nulldev_serial_putc,
43b12907f2SWilson Lee .pending = nulldev_serial_pending,
44cac73f20SKeng Soon Cheah .getc = nulldev_serial_getc,
45cac73f20SKeng Soon Cheah .setbrg = nulldev_serial_setbrg,
46cac73f20SKeng Soon Cheah };
47cac73f20SKeng Soon Cheah
48cac73f20SKeng Soon Cheah U_BOOT_DRIVER(serial_nulldev) = {
49cac73f20SKeng Soon Cheah .name = "serial_nulldev",
50cac73f20SKeng Soon Cheah .id = UCLASS_SERIAL,
51cac73f20SKeng Soon Cheah .of_match = nulldev_serial_ids,
52cac73f20SKeng Soon Cheah .ops = &nulldev_serial_ops,
53cac73f20SKeng Soon Cheah };
54