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