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
nulldev_serial_setbrg(struct udevice * dev,int baudrate)9 static int nulldev_serial_setbrg(struct udevice *dev, int baudrate)
10 {
11 return 0;
12 }
13
nulldev_serial_getc(struct udevice * dev)14 static int nulldev_serial_getc(struct udevice *dev)
15 {
16 return -EAGAIN;
17 }
18
nulldev_serial_pending(struct udevice * dev,bool input)19 static int nulldev_serial_pending(struct udevice *dev, bool input)
20 {
21 return 0;
22 }
23
nulldev_serial_putc(struct udevice * dev,const char ch)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 };
47