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